Datasets:

cwinkler

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patents_green_plastics

like 1

a kitchen storage bag filling device including a resilient sheet of water - resistant material having an interior portion and an exterior portion , separated by a pre - scored arc . a user grips and squeezes the interior portion of the sheet to bend the sheet along the pre - scored arc , thereby creating a free - standing funnel - like structure . the interior portion is inserted into a plastic bag and the plastic bag is held open to increase the ease of filling the bag with liquid or solid material .

a multiple cell flat molded from lightweight plastic . the cells are defined primarily by sinuous partition walls that are arranged to define an individual cell shape in the form of two opposed ogee arches connected at the wide ends of the arches . short lateral support ears are located in the cells and support the eggs with the egg surfaces spaced from the cell walls . the flats can be stacked or nested , and have special shapes at the ends for identification and end to end nesting when the stacks are used in the incubator .

a fabric packing has a plurality of layers made of a filament of metal or plastic and includes bulges for maintaining the fabric layers at a distance . the bulges have first protuberances of generally trough - shaped configuration and second protuberances formed on the first protuberances , thereby defining respective apexes . the second protuberances are sized smaller than the first protuberances , wherein neighboring fabric layers are supported on one another via the second protuberances .

an improved article for preparing critical surfaces , in particular for polishing , comprises means including a surface carrying a polishing abrasive of an average particle size less than 10 microns carried on a polymer matrix which has at least one of the following properties , microporosity , hydrophilicity and weak bonding to the polishing abrasive .

epigenetic events such as dna methylation play important roles in the regulation of gene expression . dna methylation patterns have been found to differ between healthy and diseased tissue , such as healthy and cancerous tissue , thereby allowing dna methylation to serve as a biomarker for disease states . embodiments of the invention provide methods for detecting methylation patterns in dna polymers . methylation patterns are detected , in part , through the use of surface enhanced raman spectroscopy . sers provides a sensitive structure - based technique for chemical analysis .

a process and medium are disclosed for the lyophilization of red blood cells which comprises the use of solutions including monosaccharide hexoses and pentoses , and / or biocompatible polymers to permit the reconstitution of viable red blood cells .

new aerogels are disclosed which comprise silica , at least one organic polymer having polar functional groups , and at least one metal ion . also disclosed are methods for making such aerogels . the present invention further concerns printable objects comprising these aerogels , specifically when the print media are imaged by the absorption of liquid and the spatial localization of pigments or dyes .

a strip of container carrier stock formed from a thin resilient plastic sheet material which is designed to be applied to containers by machines and which may particularly accommodate stretching forces applied nonsymmetrically relative to either the longitudinal axis of the stock or to the lateral axis extending across each laterally aligned series of bands . the stock of this invention is thus configured to be nonsymmetrical about the longitudinal axis of the stock or about a lateral axis extending through the midpoints of each row of container receiving aperture creating bands .

the specification discloses a multilaminar paperboard composite having improved recyclability and methods for forming and recycling the paperboard composite . the paperboard composite comprises a paperboard substrate having two surfaces , a highly alcoholized polyvinyl alcohol binder layer adjacent at least one surface of the paperboard substrate and a polyethylene polymeric layer bound to the polyvinyl alcohol layer . the highly alcoholized polyvinyl alcohol layer is present in an amount of from about 2 to about 12 pounds per 3000 square feet of substrate .

method of manufacturing a tubular capsule comprising fiber having a wall delimiting internal compartments that are isolated from one another , the wall being made from a solution of at least one polymer and the compartments being full of a biologically active medium , the method comprising the steps of : coextruding the solution of at least one polymer and the biologically active medium by simultaneously injecting the polymer solution and the biologically active medium through a die of determined dimensions ; interrupting the injection of the biologically active medium at determined points in time to form in the fiber successive compartments full of the biologically active medium and separated by a solid partition section consisting only of the polymer solution ; immersing the fiber in a coagulation liquid as it leaves the die so as to initiate early coagulation of the polymer solution around the outside of the fiber ; and simultaneously driving the fiber through the coagulation liquid along a determined path .

the invention is the use and application of a system having a non - toxic and biodegradable surfactant , which is not ethoxylated and is built up from alkyl polyglycoside derivatives , for use in the oilfield industry to mitigate the release of toxic chemicals into the environment . where the surfactant system incorporates a non - ethoxylated polymerized sugar for use in downhole and surface applications in the oilfield industry . the use of alkyl polyglycoside derivatives allows the creation of surfactants , which are water soluble without any ethylene oxide or propylene oxide groups attached to the main carbon backbone of the molecule . by not ethoxylating and / or propoxylating the alkyl - backbone no 1 , 4 - dioxane is produced as a by - product therefore there are no traces of this molecule in the surfactant produced using alkyl polyglycoside derivatives . additionally , these surfactants do not contain nonyl , butyl , or other alkylphenol groups .

this invention relates to bioabsorbable fibers , comprising a semicrystalline fiber - forming core polymer and an amorphous sheath polymer , wherein the core polymer and sheath polymer are separately melt extruded and connected to one another through an adhesive bond . the present invention also relates to reinforced composites of the bioabsorbable fibers , and to devices comprising the reinforced composites . the devices are suitable for in vivo implantation . some embodiments of the present devices can also support high loads , making then useful for fracture fixation and spinal fusion . the invention also relates to methods of making the various materials of the invention .

a new microsphere formulation for controlled - or sustained - release delivery of therapeutic ingredient , mainly peptides and proteins not over 10k in molecular weight , comprises at least a therapeutic ingredient , a helping agent and a biodegradable polymer . the therapeutic ingredient and the helping agent are in the form of fine particles , less than 1o um in diameter , encapsulated in the polymer which forms the microsphere matrix . a method for preparing the composition comprises a step of in - situ precipitating the therapeutic ingredient and the helping agent to the fine particles and successive steps for forming the microspheres . such a microsphere formulation offers a well - controlled release profile for prolonged period and encapsulation efficiency over 95 %.

a process and apparatus for cutting sheets of plastic material takes place upon a mobile support , such as a pallet . the pallets is centered for the cutting of the material and for the removal thereof in an assembly zone integral with a production line in which the materials of laminate glass are assembled . the pallet passes along a closed circuitous route , preferably in the presence of a plurality of similar pallets .

a highly porous three - dimensional biodegradable poly matrix with hydrolytically unstable side chains is prepared and used as a scaffold for the growth of osteoblast cells . in a preferred embodiment , the poly includes between 10 and 90 % hydrolytically unstable side chains including glucosyl , glyceryl , glyceryl , imidazolyl or ethoxy units , for example , poly phosphazene ]. the addition of the glucosyl , glycinyl or glyceryl side chains to the polymer can also be used generally to enhance growth rates of cells adhered to the polymer , presumably through uptake and metabolism of the simple sugar or alcohol units .

polymer compositions comprised of small , dry polyacrylamide particles may be dispersed into water at industrially useful rates to form aqueous compositions , by separating the particles from each other and bringing them into contact with a moving stream of water in the manner described herein . the resulting aqueous compositions may be used as a treating solution in diverse applications such as flocculants in water treating , papermaking , mining , oil field , and biotechnological separations .

the invention relates to porous ceramic composites incorporating biodegradable polymers for use as a bone substitute in the fields of orthopaedics and dentistry or as a scaffold for tissue engineering applications . the porous ceramic composite implant for connective tissue replacement comprises a porous ceramic matrix having a biodegradable polymer provided on internal and external surfaces of the ceramic matrix . the biodegradable polymer allows for the passage and / or delivery of a variety of agents throughout the porous ceramic matrix and improves mechanical properties of the implant in vivo .

a system and related techniques provide a platform for encoding high density geometric symbol sets , for example a triangular barcode - type of encoding which may be used to encode drivers &# 39 ; licenses , biometric ids , passports , or other transaction or identification media . according to embodiments of the invention in one regard , an inkjet , laser or other printer or output device may imprint a paper , plastic or other media with geometric symbols such as triangles in a defined array , to represent , for instance , name , address , or other identifying information , for instance such as digital facial photographs , iris or retinal scans , fingerprints , signatures , or other information . the geometric symbols may in one regard be arranged in a staggered format , separated in embodiments by a white space that may serve to reduce aliasing effects and other distortions . because triangular symbols may in general be packed more closely together , and the number of distinct individual symbols may scale according to the range of color space employed for the symbol set , information densities high enough to satisfactorily encode biometric iris or retinal scans , digital facial photographs , or other identification or other information may be achieved . in embodiments , error correcting processing such as reed - solomon techniques may be employed to enhance scanning accuracy . in further embodiments , a reference palette may be embedded within the imprinted media , to provide a scale against which color fading or other distortion may be measured .

this invention relates to novel macromolecular compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen , such a petroleum products , synthetic polymers , and elastomeric substances .

a vascular prosthesis is made by wetting a porous polyester fiber tubing with water until it gains close to maximum amount of weight , removing excess liquid from inside the tubing , repeatedly contacting the inside surface of the tubing with a solution of a biocompatible polymer in a water - immiscible solvent to adsorb some solution on the inside surface of the tubing , and removing excess solution , then removing solvent from the adsorbed solution to form a nonporous elastomer coating of the desired thickness on the inside surface of the tubing .

the invention herein relates to a method and apparatus for forming an embossed blister from a laminated film wherein an indicia is formed on the base of the blister . in particular , the invention involves a single pass process of combining the formation of a blister and the formation of an indicia on the blister , wherein the blister - forming pin contains a face with an indicia and is adapted to controllably stretch the laminated film during blister formation to minimize stretching of the film at the base of the blister . the invention is particularly useful in manufacturing processes which involve the formation of blisters having laminated films which contain a metal foil and polymer layer , wherein improved control in the stretching of the laminate during blister formation is desirable .

a molded plastic retainer for supporting a spiked vehicle stud . in a construction useable with snowmobile studs , a ground engaging surface includes a self threading center bore and concentrically disposed to which are a raised , hexagon tool surface and a number of pointed secondary , traction enhancing studs . a track engaging surface of the retainer includes a tapered recess concentric to the stud receiving bore and a number of projections which enhance the grip between the retainer and track without squeeze out or tearing . alternative configurations and mounting arrangements of the secondary studs and gripping projections are disclosed and some of which provide multi - faceted surfaces .

a scraper bar for use with conveyor belting and the like to clean such belting of material adhering to its surface . the scraper bar consists of a layer of hard abrasion - resistant pellets embedded in an elastomer to form an elastomer / pellet matrix . an additional layer of elastomer is cast to the matrixed layer to provide a surface for attaching the scraper to its support when in service . embedded in the layer of unmatrixed elastomer is an insert of particle board , chipboard , plywood or fibreglass reinforced plastic sheeting . the insert prevents bowing of the scraper bar due to differential shrinkage between the layer of matrixed elastomer and pellets and the supporting layer of elastomer .

a can package comprising a plurality of cans , preferably twelve , including a flat carrier in the form of a sheet having openings stretched over the upper ends of the cans and a tubular banding strap of plastic material stretched about the periphery of the group of cans and bonded along one edge to the periphery of the carrier . the band includes an integral handle .

an ink jet recording sheet comprises a support carrying an ink - receiving layer , this layer comprising a hydrophilic polymer , preferably poly and a poly of the formula : ## str1 ## wherein each of r 1 , r 2 , r 3 , r 4 , r 5 and r 6 is independently alkyl of from 1 to 4 carbon atoms ; each of r 7 , r 8 and r 9 is independently alkyl of from 1 to 18 carbon atoms and the total number of carbon atoms in r 7 , r 8 and r 9 is from 13 to 20 ; each m - is an anion ; and each of a , b and c is the molar proportion of the respective repeating units .

rubbery polymers made by anionic polymerization can be coupled with tin halides or silicon halides to improve the characteristics of the rubber for use in some applications , such as tire treads . in cases where the rubbery polymer was synthesized utilizing a polar modifier it is difficult to attain a high level of coupling . this invention is based upon the unexpected finding that coupling efficiency can be significantly improved by conducting the coupling reaction in the presence of a lithium salt of a saturated aliphatic alcohol , such as lithium t - amylate . this invention discloses a process for coupling a living rubbery polymer that comprises reacting the living rubbery polymer with coupling agent selected from the group consisting of tin halides and silicon halides in the presence of a lithium salt of a saturated aliphatic alcohol . the lithium salt of the saturated aliphatic alcohol can be added immediately prior to the coupling reaction or it can be present throughout the polymerization and coupling process . lithium t - amylate reacts with water to form t - amyl alcohol during steam stripping . since t - amyl alcohol forms an azeotrope with hexane , it co - distills with hexane and can contaminate recycle feed streams . this problem of recycle stream contamination can be solved by using metal salts of cyclic alcohols that do not co - distill with hexane or form compounds during steam stripping which co - distill with hexane . thus , the use of metal salts of cyclic alcohols is preferred for this reason and because they are considered to be environmentally safe .

polymer composite including a compatibilizer and having selective permeability to chemical permeants due to interaction differences between the compatibilizer and the chemical permeants , includes 50 - 99 wt % of an amorphous thermoplastic resin selected from the group polyethylenepropylendienterpolymer , poly - 1 - propyne ), amorphous nylon , polystyrene and polycarbonate ; 0 . 9 - 50 wt % of a semi - crystalline polymer selected from the group polyamide , polyethylene terephthalate , polybutylene terephthalate , polyethylene , polypropylene , polyetheretherketone , polyvinylidene fluoride , polytetrafluoroethylene , polyphenylene sulfide , and thermotropic or lyotropic liquid crystal polymer , and dispersed in the amorphous thermoplastic resin to provide a dispersed phase having an interface with the amorphous thermoplastic resin ; and 0 . 1 - 10 wt % of a compatibilizer positioned at the interface of the dispersed phase with the amorphous thermoplastic resin and having different interactions with different chemical permeants so that the selective permeability of the polymer composite is affected .

a plastic motion sickness receptacle is disclosed having a seamless perimeter defined by a tubular member folded at a first closed end , and an open end including means for closing the receptacle after use . the plastic tubular member comprises integrally formed walls that terminate in a base at said closed end with the edges of the walls cooperating to form a fluid - tight relationship . an outer surface of the receptacle includes indicia printed thereon including instructions for using the bag upon the occurrence of motion sickness .

an exemplary embodiment of a temperature sensor includes housing , and a solid state temperature sensing device disposed within the housing . a first wiring conductor makes electrical connection from outside the housing to a first terminal of the sensing device . a second wiring conductor makes electrical connection outside the housing to a second terminal of the device . the housing is an over - molded plastic structure encapsulating the sensing device and portions of the first and second wiring conductors . the plastic structure is fabricated of a thermally conductive material . a method for fabricating a temperature sensor positioning a sensor assembly including an elongated circuit board , a solid state sensing device mounted to a tip of the circuit board , and a portion of a cable assembly electrically connected to the circuit board within a mold assembly defining a housing cavity . molten plastic material is injected into the housing cavity to encapsulate the circuit board , the solid state sensing device and the portion of the cable assembly . the plastic material is thermally conductive and electrically non - conductive . the molten plastic material cools to form a housing structure protecting the sensing device .

a method of cleaning a pin head or other implements between handling a plurality of samples of nucleic acid subject to an amplification process using a biochemical amplification product . the method comprises exposing the pin head or other implement to ultraviolet and preferably also infrared illumination between handling different samples in order to suppress cross - contamination by non - specific amplification . the biochemical amplification product may be obtained from a rolling circle amplification procedure , such as that catalyzed by bacteriophage phi29 , or a polymerase chain reaction amplification product .

container transport apparatus for transporting containers such as plastic bottles and the like which are subject to damage without damaging the containers . the container transport apparatus includes container guiding members for guiding containers such as plastic bottles through a bottle rinser or the like and elongated endless belt members for contacting the sides of the containers to move the containers along the path of the container guiding members . the container transport apparatus eliminates the problems associated with conventional bottle rinsers and the like when used with non - rigid bottles .

an assay element is described including recognition ligands adapted for binding to carcinoembryonic antigen bound to a film on a single mode planar optical waveguide , the film from the group of a membrane , a polymerized bilayer membrane , and a self - assembled monolayer containing polyethylene glycol or polypropylene glycol groups therein and an assay process for detecting the presence of cea is described including injecting a possible cea - containing sample into a sensor cell including the assay element , maintaining the sample within the sensor cell for time sufficient for binding to occur between cea present within the sample and the recognition ligands , injecting a solution including a reporter ligand into the sensor cell ; and , interrogating the sample within the sensor cell with excitation light from the waveguide , the excitation light provided by an evanescent field of the single mode penetrating into the biological target - containing sample to a distance of less than about 200 nanometers from the waveguide thereby exciting any bound reporter ligand within a distance of less than about 200 nanometers from the waveguide and resulting in a detectable signal .

a tubular intraluminal prosthesis includes a ptfe or eptfe tubular structure such as a graft , and a tubular diametrically deformable stent circumferentially surrounding the tubular structure . the diametrically deformable stent includes a polymeric coating which allows for attachment to the tubular graft structure and enhances the biocompatibility and integrity of the composite prosthesis .

a model airplane , airplane kit , and method of making a model airplane . the kit of the present invention enables children and adults to easily make a well - flying model airplane using recycled plastic foam moldings such as polystyrene food trays well known as 10 - s in the food packaging arts .

recycle bins and recycle attachments for stacking and condensing discarded paper cups and plastic glasses inside each other . the process of stacking cups and glasses in a series will greatly increase the available space within recycle bins by eliminating the “ wasted empty space ” void typically found within empty cups and glasses . accordingly , recyclable containers will need to be emptied less often which ultimately saves municipalities time , money and maintenance . additionally , this invention greatly aids in the later sorting and processing of recyclables .

a preferred embodiment of the present invention provides a method and system for building cost - efficient biocompatible hydrogel constructs using stereolithography . hydrogel constructs may be used in , for example , multi - lumen nerve regeneration conduits and other tissue engineering scaffolds with embedded channel architecture that facilitate tissue regeneration through possible incorporation of precisely located bioactive agents , cells , and other desired inert and / or active chemical agents and devices . another preferred embodiment of the present invention provides a method of fabricating a hydrogel construct comprising : solidifying a first solution into a first construct layer with a first energy dosage using stereolithography , the first solution comprising : a first polymer ; and a first photoinitiator , wherein the first polymer and first photoinitiator are of a first concentration .

non - polymeric drag reducing agents in the form of maleated fatty acids and the esters thereof and the organic , inorganic or amine salts thereof are described herein . these additives are useful to reduce drag in hydrocarbon fluids and multi - phase fluids of hydrocarbon and water . no injection probes or other special equipment is expected to be required to introduce the drag reducing agent into the liquid stream , nor is grinding of the additive necessary to form a suitable drag reducing agent . the drag reducing additives of the invention are not subject to shear degradation and do not cause undesirable changes in the emulsion or fluid quality of the fluid being treated , or undesirable foaming .

disclosed is a steering wheel for an automotive vehicle , comprising a light weight expandable hollow member which is capable of maintaining its predetermined shape and defining therein a gas - sealed space , and a reinforced plastic material covering and in contact with the hollow member , thereby providing a necessary large cross - sectional area of at least the rim section of a steering wheel of decreased weight at low production cost and high production efficiency .

the invention discloses the incorporation of nanostructured additives into high - performance , hydrogen - rich polymeric materials to provide radiation shields for use against galactic cosmic radiation and solar energetic particles as well as secondary particulate and electromagnetic radiation resulting from nuclear reactions within the shield . nanostructured materials are defined as having at least one dimension in the nanometer range , and may include metallic and metal - oxide nanoparticles , nanotubes , nanoclays , coated polymeric nanoparticles and pairs of materials forming a nanostructured interface . functionalization of additives is performed to increase their compatability with polymeric materials . hydrogen - rich polymers refer to those having interstitial hydrogen or hydrogen - containing materials pendant to the polymer backbone . one embodiment of the invention comprises a radiation shield in which a nanostructured additive capable of shielding against electromagnetic radiation is incorporated with a hydrogen - rich polymer capable of slowing energetic particles . multifunctional structural shields may also protect against atomic oxygen degradation and control electrostatic discharge .

improved powder coatings exhibit enhanced resistance to bacterial and fungal attack , while possessing excellent toughness , appearance , corrosion resistance , durability , processability , and ease of application . the coating is comprised of anti - microbial agents that are homogeneously dispersed within the powder or impact fused to powder particles or both . an article may be coated with a thermoset thermoplastic , or radiation curable powder , which may be applied by electrostatic spray or fluidized bed or by thermal or flame spray .

a polymeric device releasing biologically active , water - soluble materials having a molecular weight of less than 1000 in a controlled , continuous and linear manner over an extended period of time . insoluble polymer matrixes can be defined in any shape , size and drug content . when applied to medical use , biocompatible polymers are used so that the device is implantable . the device is made by modifying prior art devices based on diffusion of fluid into a polymeric matrix containing dispersed biologically active molecules to yield a polymer device which can be placed in a fluid environment , so that fluid is absorbed by the device and the water soluble molecules diffuse into the fluid environment , leaving behind pores and channels , where the rate of diffusion is limited by an impermeable coating over a portion of t the u . s . government has rights in this invention by virtue of this research supported in part by n . i . h . grant gm26698 .

a first drive apparatus for a thermoplastic web operates at an automatically adjusted , substantially constant , speed to deliver the thermoplastic web to a welding tool which rotates with a second pair of rollers . the second pair of rollers are driven at a cyclically variable speed in which the minimum speed is attained at the time when the welding tool is in contact with the thermoplastic web . an automatic control system adjusts the speed of the feed rollers to correspond to the speed of the welding tool at the instant during which welding is performed . adjustment of the ratio of the maximum to the minimum speed of the cyclically variable speed of the second pair of rollers controls the length of thermoplastic web between welds without changing the speed of the driving input to the second pair of rollers .

composite panels with high fire - proofing capacity have two outer layers and a core that features a core mixture containing aluminum hydroxide in compacted form , lightweight fillers , in some cases fine gained or splintery aluminum hydroxide , as desired magnesium hydroxide and polymer - based binding agents . the composite panels are suitable e . g . as facade panels for building constructions .

the present invention provides a novel apparatus to grow cells where the cultivation chamber is partially filled with liquid cultivation medium and cells . mixing and aeration is achieved by generating intermittently one single large gas bubble at the bottom of the column bioreactor , the single large bubble width representing from 50 99 % of the tank width , preferably from 60 to 99 %, more preferably 98 . 5 %. the culture medium flows out as a film between the large bubble and the inner wall of the bioreactor . this rising bubble allows mixing and aeration of the bulk . as the design of the invention is very simple , it is possible to manufacture it with flexible plastic material and use the apparatus as a disposable system . moreover , such a mixing / aeration principle minimizes cell damages usually due to shear stress and small bubbles and allows easy and efficient scale - up from small scale to a larger one . such a large - scale , efficient and disposable culture system can largely reduce production costs .

the present invention relates to a composition of matter for the time - dependent liberation of therapeutic agents . this composition of matter comprises a polymeric slab and a homogeneously dispersed enzyme which degrades the polymeric slab in the presence of moisture . the therapeutic agent is physically entrapped in the polymeric slab by inclusion during polymerization to form the polymeric slab or by mixture of the therapeutic agent with a liquid form of the polymeric slab and conversion of the liquid to a solid form . the therapeutic agent is not chemically bound to the polymer , and thus release of the agent is immediately effected upon the specific moisture - activated enzymatic degradation of the polymer slab . moisture for enzymatic activation is provided by the biological surface on which the slab is emplaced , such as the dermal surface . the composition comprises a polymer such as poly and an enzyme such as proteinase k together with chlorpheniramine maleate as the therapeutic agent .

a recording sheet for ink - jet printing includes a supporting substrate , at least one microporous ink - receptive coating overlying a front surface of said supporting substrate and at least one protective overcoating overlying said microporous coating . the protective overcoating includes at least one compound selected from the group consisting of polysaccharides and polyacrylamides , and fluoropolymer particles . the diameter of the fluoropolymer particles is between about 0 . 5 and 3 micrometers .

metallized plastic such as chrome plated plastic is processed to separate metal from plastic and especially to recover reusable , essentially metal - free plastic . metallized plastic is comminuted , as necessary , to suitably sized pieces which then are exposed to cryogenic temperature and impacted in a rotary mill to form a mixture of plastic and metal particles . subsequently most of the metal particles are removed from the mixture by effecting particle size and magnetic separation steps . oversized particles can be recycled for further processing . the recovered plastic is then extruded , under conditions which render it molten , through one or more screens .

an improved method and apparatus for coating semiconductor substrates with organic photoresist polymers by extruding a ribbon of photoresist in a spiral pattern which covers the entire top surface of the wafer . the invention provides a more uniform photoresist layer and is much more efficient than are current methods in the use of expensive photoresist solutions . a wafer is mounted on a chuck , aligned horizontally and oriented upward . an extrusion head is positioned adjacent to the outer edge of the wafer and above the top surface of the wafer with an extrusion slot aligned radially with respect to the wafer . the wafer is rotated and the extrusion head moved radially toward the center of the wafer while photoresist is extruded out the extrusion slot . the rotation rate of the wafer and the radial speed of the extrusion head are controlled so that the tangential velocity of the extrusion head with respect to the rotating wafer is a constant .

a process for removing blowing agent from polymeric foam . the process comprises breaking up the foam in a liquid medium to obtain a solid phase of polymeric fragments and a liquid phase of blowing agent and liquid medium . the polymeric particles are then separated from said liquid phase .

the invention is directed to a method of making carboxylated cellulose fibers whose fiber strength and degree of polymerization is not significantly sacrificed . the method involves the use of cyclic nitroxide free radical compounds as a primary oxidant and a hypohalite salt as a secondary oxidant in an aqueous environment . preferably the oxidized cellulose is then stabilized against d . p . loss in alkaline environments and color reversion with a reducing agent such as sodium borohydride . alternatively it may be treated with an oxidant such as sodium chlorite . the method results in a high percentage of carboxyl groups located at the fiber surface . the product is especially useful as a papermaking fiber where it contributes strength and has a higher attraction for cationic additives . the product is also useful as an additive to recycled fiber to increase strength . the method can be used to improve properties of either virgin or recycled fiber . it does not require high α - cellulose fiber but is suitable for regular market pulps .

yarn strands derived from a creel are compressed together in parallel orientation and moved forward by reciprocating clamping means . a knife periodically severs a bundle comprising preselected short yarn lengths , which is compressed together and dropped into a chute . an impeller pushes each bundle through the wedge - shaped lower end of the reciprocating chute which extends in turn into each of a series of plastic bags being furnished from a roll or by an associated machine . the filled bag is sealed , cut loose and tossed into a bin .

high accuracy positioning relative to an absolute reference position is provided for a plurality of cores constituting a polymer waveguide array for connection to ferrules at ends of a plurality of these assemblies to form a single - mode polymer waveguide array assembly . a method for forming a single - mode polymer waveguide array assembly enables a plurality of cores constituting a polymer waveguide array to be positioned with high accuracy . also provided is a combination of process molds used in the processes unique to the present methods .

a method for preparing a metal substrate for inkjet ctp , comprising : treating a metal substrate by anodizing or non - anodizing , and then applying a hydrophilic polymer paint on the surface of the metal substrate . due to the existence of nano - size or micron - size oxide particles in the hydrophilic polymer paint , the metal substrate has high specific surface energy , while the metal substrate has a certain roughness , therefore the metal substrate has ink absorbency and good abrasive resistance . the metal substrate can reduce the spread of ink droplets and produces print image having better resolution and definition . the non - anodizing method can avoid environmental pollution which is caused by waste acid and waste alkali discharge of anodizing method .

described is an optical compensator device that can maintain a high degree of performance in the demanding environment of projection display . a mounting process involves using a sealant between optically clear glass or ceramic substrate and low elastic polymer retarder film . the sealant may mitigate or prevent the degradation of the retarder film by acting as an oxygen barrier that seals the substrate and increases the lifetime of the device in high luminance .

multi - layer nonwoven sheet structures are disclosed in which at least one synthetic polymeric fibrous nonwoven layer is adhesively bonded to a second layer using a water - based adhesive . the nonwoven layer is chosen to provide fast drying times . the multi - layer nonwoven sheet structures are useful in medical garments .

fibroblast cells are treated with a chemical inhibitor of protein kinase c such as staurosporine , in conjunction with functionally hypoxic micromass culture so as to be induced into chondrogenic differentiation . such fibroblast - derived , chondrocyte - like cells may be seeded onto three - dimensional polymer scaffolds for use in the repair of articular cartilage lesions , and thus can obviate the need for invasive techniques to harvest autologous chondrocytes from a limited supply of existing articular cartilage , or to avoid the need for obtaining allogeneic chondrocytes from non - biocompatible donor tissues .

this invention is intended to provide a high strength porous concrete structure which is preferably applied to a water permeable pavement , a draining pavement , a sound insulating board , a sound - proofing barrier , a sound absorbing block for acoustic , a block for plants , a riverbed block , a water purifying matrix , a gas absorbing matrix , a decorative board for building , a fish reef , a block for fish reef or a block for breeding algae and to provide a method of manufacturing the high strength porous concrete structure . the high strength porous concrete structure 1 having an arrangement in which a plurality of lumps 2 whose configuration is rough aggregates are integrally formed with the same concrete tissue and a gap 3 formed between the lumps 2 is through to a back side 2 a of the lump 2 is manufactured by putting a thermoplastic material 8 into contact with a surface of a porous concrete structure 6 using rough aggregates 10 so as to form a form 9 and placing mortar or concrete 13 which does not include rough aggregates into the form 9 .

a composite biocompatible hydrogel material includes a porous polymer matrix , the polymer matrix including a plurality of pores and providing a young &# 39 ; s modulus of at least 10 gpa . a calcium comprising salt is disposed in at least some of the pores . the porous polymer matrix can comprise cellulose , including bacterial cellulose . the composite can be used as a bone graft material . a method of tissue repair within the body of animals includes the steps of providing a composite biocompatible hydrogel material including a porous polymer matrix , the polymer matrix including a plurality of pores and providing a young &# 39 ; s modulus of at least 10 gpa , and inserting the hydrogel material into cartilage or bone tissue of an animal , wherein the hydrogel material supports cell colonization in vitro for autologous cell seeding .

a plastic lid for a metal can including a liquid . the lid includes a cavity receiving a neck that can be folded down and secured to a wall section of the cavity . the free end of the folded - down neck compresses a wall of the cavity and seals the can , closing an air intake slit provided in an elastomer material .

a sifting screen and method of manufacturing such a screen . segments of the screen are provided with a unique cross - sectional structure to afford various desirable characteristics to such an implement . the cross section includes , typically , a wire frame , a hard plastic encapsulation layer and an elastomeric outer layer .

a plastic film fluid storage bag and dispensing spike assembly and method wherein the spike punctures the film and forms a fluid tight seal with the film surrounding a hole formed by the puncture . the film has no separate port structure for dispensing its contents . the spike may include a bulbous body with a sharpened tip at one end , an enlarged central portion , and a reduced diameter portion at its opposite end , adjacent a radially extending skirt . when seated , a seal is created around the smaller diameter portion of the body and against the skirt . the spike may alternatively include a cylindrical body with a slightly rounded point at one end and a radially extending skirt intermediate its ends . finally , the cylindrical body spike may be used without a skirt . in all cases , a fluid passage extends through the body .

a smokeless tobacco product adapted for oral administration includes a permeable pouch adapted for administration into a user &# 39 ; s mouth and adapted to be removed from the mouth and disposed in nature and smokeless tobacco contained in the pouch . the pouch is made from a degradable polymer whose degradation properties allow the pouch to be essentially intact until the time of disposal and allow the pouch to degrade in nature after disposal .

polymeric organic compounds are pyrolyzed to remove them from objects by heating in a first vacuum chamber to render flowable such polymers as are fusible at a temperature below that at which appreciable degradation is initiated . the fused polymer drops by free fall from the first chamber to a second vacuum chamber through a conduit connecting the two without contacting any intervening structure . the second chamber is maintained at a substantially lower temperature , where the polymer resolidifies . upon further heating , polymer remaining in the first chamber is volatilized and withdrawn from the chamber to a water mist scrubber where it is largely trapped . remaining vapors in the scrubber are drawn through a vapor separator to a vent stack . after the combustible volatiles are removed from the first chamber , air is admitted into the chamber to oxidize any residual carbon ash , leaving only the inorganic residue which is easily removable from the objects or materials that were not affected by the pyrolysis action .

the shelf life of fresh harvest produce is extended by coating the exterior surface of freshly harvested produce with a coating composition comprising an aqueous emulsion of polyvinylidene chloride copolymers containing from about 0 . 25 to 25 % by weight of copolymer solids to water and between 0 . 001 and 20 % plasticizer preferably a polyethylene oxide based additive such as triton - x to weight of copolymer solids in the emulsion . the coating may also contain biocides as well to control bacteria and fungal growth an the post harvest produce during storage , shipping , distribution , and sale of the product . the coating composition is effective in extending the shelf life of produce .

the present invention provides a biomimetic polymer for stabilizing wellbore , a method for preparation of the biomimetic polymer , and a drilling fluid . the polymer contains carboxymethyl chitosan that serves as a backbone and dopamine - derived groups grafted on the backbone . the polymer provided in the present invention can improve the strength of shale in the wellbore , seal the shale pores and reduce the filter loss of drilling fluid , and thereby attains an effect of stabilizing the wellbore in shale formation in drilling process .

a device for feeding flowable material , such as plastic granulate to a production machine , e . g . an injection molding machine , the device having a pneumatic granulate conveying line terminating at a feed barrel above the production machine and a bypass line leading through the storage receptacle , thereby automatically diverting the air flow to the bypass line , when the feed barrel is full . heating of the conveying air makes it possible to dry and preheat the granulate inside the storage receptacle .

a transcutaneous access device includes a subcutaneous skirt , a transcutaneous neck and an extracutaneous extensible sleeve all of which may be made of an inexpensive plastic material . preferably , the skirt and neck are covered with a porous bed material which encourages the growth of tissue and collagen . the device functions as a conduit for an access catheter and is sized to minimize contact with the catheter and to allow vertical and horizontal motion of the catheter relative to the implanted portions of the access device so that twisting and stretching of the tissue adjacent to the implanted access device caused by normal body motions do not upset the biological seal that forms around the access device .

the present invention comprises preparations of polyoxypropylene / polyoxyethylene copolymers which retain the therapeutic activity of the commercial preparations , but are substantially free from the undesirable effects which are inherent in the prior art preparations . because the preparations of polyoxypropylene / polyoxyethylene copolymers which comprise the present invention are a less polydisperse population of molecules than the prior art polyoxypropylene / polyoxyethylene copolymers , the biological activity of the copolymers is better defined and more predictable .

there is disclosed a method for the imprinting and decorating rotomolded products . the method comprises the application to the interior surfaces of the mold of a viscous suspension of pigment in a preselected pattern . the suspension is applied to the mold surface in an oil carrier using a vegetable , animal or mineral oil that is inert under the molding conditions and that has a sufficient viscosity at the molding conditions to maintain the film on the mold surfaces . the pattern of the pigment suspension is applied by spraying , brushing , screen printing and the like and , after its application , the conventional rotomolding can be practiced . in this method , the powdered plastic , typically high density polyethylene , in powder form is charged to the mold , the mold is closed and placed in an oven heated to from 500 ° f . to about 800 ° f . while rotating the mold along two axes , to tumble the plastic powder against the heated side of the mold where the powder consolidates into an integral molded wall of a plastic shape . the invention provides a very high line or character definition preferably using finely subdivided pigments .

feed stock is made from an assortment of post - consumer polymer articles by assembling those articles of the assortment which are suitable for recycling into feed stock . the assemblage is granulated into particles of a size suitable for feed stock . a detergent solution of predetermined concentration is formed for cleaning the granulated particles . the solution is added to the particles during the granulating step to mix the detergent solution with the articles to facilitate cleaning during granulating .

a cutter hub pin drive mechanism and a quick disconnect hub for a pelletizer and a pelletizer having a cutter hub pin drive mechanism are provided . the pelletizer has a cutter hub that includes a cutter hub holder which is engaged with the pelletizer shaft through a plurality of drive pins . the drive pins ride in drive pin channels formed by grooves cut into an inner surface of the cutter hub holder and aligned grooves formed in the outer surface of the forward end of the pelletizer shaft . by machining of grooves into the cutter hub holder and shaft to form channels that receive the drive pins , more precise engagement between the pelletizer shaft , cutter hub holder and drive pins is obtained , resulting in improved torque transmission from the shaft to the cutter hub . also provided is a seal around the pelletizer shaft to prevent the egress of fines into the drive pin area which might otherwise interfere with the unobstructed movement of the cutter hub holder necessary to adjust blade position . finally , a quick disconnect hub is provided by which the pelletizer shaft can be readily disconnected from the cutting assembly to facilitate the removal of agglomerated polymer in the cutting chamber .

a moisture - permeable acoustic lamina which is usable as a wall covering has a foraminous woven fabric layer adhered to a fabric backing by a discontinuous thermoplastic polymer layer . the woven fabric preferably has an embossed undulate outer surface to enhance the acoustic properties of the lamina and to impart an aesthetic textural appearance . the individual yarns of the woven fabric are preferably substantially uniformly coated with a polyvinyl chloride plastisol to impart stain and wear - resistance , inhibit the growth of molds , fungi , bacteria and the like , and to enhance the appearance of the exposed face of the lamina . the moisture - permeable lamina structure allows wall covering paste , used to adhere the lamina to a wall , to dry at an acceptable rate , yet does not allow paste to bleed through the foraminous woven fabric layer .

a composite structure which comprises , in intimate jointed lamination , a substrate layer , and intermediate adhesion layer , and a tightly adhered polymeric film , the adhesion layer comprising an aqueous emulsion polymer containing a vinylamine homopolymer or copolymer , preferably polyvinyl alcohol / polyvinylamine copolymer .

disclosed is a gas generating polymer compound that when irradiated with light or other radiation sources makes a solid to gas phase transition due to chemically catylized degradation , irradiative degradation or both . this provides a low cost , stable and easily manufactured means of gas production . also disclosed are possible uses for the gas generator such as a low cost micro thruster .

a waste disposal receptacle comprising a receptacle body and a lid . the receptacle body has a bottom and four side walls which may be formed from one unitary blank or a pair of interconnected blanks . the side walls may be scored to be folded flat in either a square parallelogram configuration or a hexagonal configuration . the side walls define trapezoidal apertures through which weights such as sand bags , bricks , or boards may be placed onto the bottom to weigh down and stabilize the waste disposal receptacle . two of the opposing side walls define upwardly projecting ridges that are received through correspondingly aligned slots in the lid , the ridges and lid holding a thin plastic bag within the waste disposal container in an upright and open position . the lid may define one or more waste receiving openings particularly designed for recyclable waste , such as a pair of circular openings for receiving metal cans and glass bottles . the receptacle body and lid are preferably constructed from a double - faced corrugated plastic sheet material .

the invention provides compounds of formula : and salts thereof , wherein x and y have any of the values defined herein . the compounds inhibit bacterial rna polymerase , inhibit bacterial growth , and have applications in , analysis of rna polymerase structure and function , control of bacterial gene expression , control of bacterial growth , antibacterial chemistry , antibacterial therapy , and drug discovery .

a flexible sachet for transporting bio - pharmaceutical liquids with a volume of 50 liters or more , of the bellows type , assumes when filled a substantially parallelepiped shape . it comprises a bottom wall , a top wall and four lateral walls . it is made of a single laminated film with three or more layers , the innermost layer being a plastics material layer that can be heat welded and is biocompatible with the media transported . a method of manufacturing the sachet is also disclosed .

polymer - based biomaterials are popular due to ease of fabrication and low costs . however , many polymer substrates have undesirable surface properties . the invention provides a procedure to covalently apply a graft polymer to the surface of a polymer substrate by ultraviolet graft polymerization . the graft polymer is formed from monomers such as peg , aa , monomethoxy acrylate peg , hema , or dma . also , mixed monomers may be used to create the graft and the surface properties of the graft may be tailored for different properties , including hydrophobicity , friction coefficient , electroosmotic mobilities and electrophoretic separations . the invention has particular utility in tailoring surface chemistries in ocular lenses and polymer microdevices . i . ii . r : — oh acrylic acid — nh 2 acrylamide — n 2 dimethylacrylamide — och 2 ch 2 oh 2 - hydroxyethylacrylate — o n ch 3 peg monomethyoxylacrylate

enhanced performance yarns which are functional alternatives to 100 % petroleum oil based virgin continuous filament yarns , and yarns of natural fibers and methods of making them . the yarns may comprise an inner portion of spun staple fibers of recycled plastic and an outer portion comprising a different material and incorporate highly significant amounts of recycled plastics , particularly post consumer recycled , thermoplastic material such as polyethylene terephthalate which contains medium to high levels of contamination . one embodiment of yarn comprises a core , an inner portion of spun staple fibers surrounding the core , and an outer portion comprising an inner helix and an outer helix .

the device called scoopeeze ™ is a portable canine waste pick up device uniquely designed to aid pet owners while walking their dog . consisting of two interrelating nylon , polypropylene or other plastic semi - circles and a biodegradable sanitary lining . the scoopeeze ™ device allows the dog owner to pick up canine waste far more quickly than standard means , contain the waste without “ touching ” or grasping the waste , discretely carry waste until proper disposal , provides an esthetically pleasing and elegant way to achieve the above . when used in combination with a standard leash , the scoopeeze ™ handle provides a more ergonomic and stronger means of pet control . when used with retractable leashes the handle is removed , the scoopeeze ™ is “ docked ” and the same unique , fast , sanitary , and elegant features are available to the pet owner .

a coextrusion die for extruding multilayer thermoplastic material in the form of a tube . the die is of the type known as a spiral mandrel die wherein the die mandrels are provided with helical grooves on their peripheries . at least one spiral mandrel has helical grooves of opposite hand than those of the remaining mandrels .

a formamide - free foam prepared by using sodium bicarbonate as a foaming agent and electron - beam irradiation for crosslinking is revealed . after copolymer and sodium bicarbonate being mixed evenly , the mixture is heated and compounded to form an intermediate . then the intermediate is pressed and injected to form a sheet . next the intermediate is irradiated by an electron - beam to form crosslinks therein . at last the intermediate is heated and foamed to get a formamide - free foam . compared with foam produced by using azodicarbonamide as the foaming agent available now , formamide - free foam not only causes no harm to human health but also gives no negative effect to the environment during recycling . thus the formamide - free foam is really environmentally friendly .

biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride , itaconic anhydride or citraconic anhydride . free radical polymerization is used in the synthesis of the polymers . the polymers maybe complexed with ions and / or mixed with fertilizers or seeds to yield agriculturally useful compositions . the preferred products of the invention maybe applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants .

a loose leaf page for selectively storing four compact discs on each side of the page , or for storing two cds and associated printed and graphic information on each side of the page . a flexible , plastic , two - sided , loose leaf page includes four cd storage pockets per side of the page , and includes a hole pattern that facilitates releasably mounting the page in a standard cover - size 1 - inch , 1 1 / 2 - inch or 3 inch three - ring binder notebook , certain embodiments also facilitating mounting of the page in a three - ring chicago - posted binder . in order to prevent interference between two cds that reside closest to the binder rings when a user manually leaves through binder pages , the page includes a six - hole pattern , or a three - hole / three - notch pattern , that is configured to ensure that a vertical pivot line , or binder edge , on the page being turned moves past the vertical leading edge of the three rings , and then moves backward under the three rings . the cd storage page includes two outer transparent polypropylene layers and an inner layer that is constructed of soft nonwoven polypropylene .

this invention herein describes a method of facilitating the entry of drugs into cells and tissues at pharmokinetically useful levels and also a method of targeting drugs to specific organelles within the cell . this polar lipid / drug conjugate targeting invention embodies an advance over other drug targeting methods because through this method , intracellular drug concentrations may reach levels which are orders of magnitude higher than those achieved otherwise . furthermore , it refines the drug delivery process by allowing therapeutic agents to be directed to certain intracellular structures . this technology is appropriate for use with antiproliferative , antibiotic , antimycotic , antiviral and antineoplastic drugs , in particular in combination with a multiplicity of other emollients and agents to make up topically - active substances such as salves , for rapid and efficient introduction of such agents through the epidermis for treatment of skin diseases and other disorders .

a process for forming sheet metal material having a yield strength and tensile strength which are sensitive to small changes in temperature at ambient conditions , wherein an unheated sheet metal workpiece is drawn between a concave die cavity and a mating convex punch by relative movement therebetween into the internal configuration of the die , and wherein the workpiece is selectively cooled in those areas which are susceptible to breakage . cooling may be effected by cooling portions of the punch , or in complex part designs by cooling localized portions of the die , or both . the amount of cooling is relatively slight and may be only that required to remove heat generated by plastic deformation of the workpiece in the areas susceptible to breakage .

a process for the aseptic concentration of collagen from about 0 . 25 % suspensions to gels of 15 % using vortex flow filtration with a variety of membrane types -- ultrafiltration and microfiltration and polymeric and stainless steel is provided . the resulting gels are suitable for use in medical products and / or pharmaceutical formulations . this process achieves high degree of concentration in a closed system and at high flux with minimal trans - membrane pressure drop .

an expandable folder is provided which includes a front panel member , a rear panel member , and a gusset member which connects peripheral portions of the bottoms of the front and rear panel members and at least a portion of the sides of the panel members to form the expandable folder . the gusset member includes a sheet having a plurality of accordion - like folds , with terminal folds of the sheet being wider than the other folds , and the terminal folds are connected to the front and rear panel members to enhance the connection therebetween . the expandable folder further comprises interior reinforcing strips positioned along at least part of the connection between the gusset member and panel members peripheral portion for preventing separation of the front and rear panel members from the gusset member when the folder is used . reinforcing strips may also be provided along the top or corners of the gusset member or on outer peripheral portions of the panel members . in addition , the outer surfaces of the panel members may be coated with a polymer to increase the resistance of the folder to water penetration and to protect the folder from disfigurement .

a method is described for the amperometric determination of the concentration in a biological sample of a constituent which is a substrate for an oxidase enzyme by catalyzing the substrate with the enzyme , thereby consuming o 2 and producing h 2 o 2 and measuring the o 2 consumption or h 2 o 2 production by means of an inert metal indicator electrode intimately coated with a thin film of a perfluorosulfonic acid polymer . a reaction chamber is described which provides means for contacting the sample with the enzyme and means for making amperometric measurements utilizing inert metal indicator electrodes coated with a thin film of a perfluorosulfonic acid polymer .

an expandable media filter structure is composed largely of biodegradable materials and is environmentally disposable . a plurality of pleated panels are interconnected at their edges so as to be collapsible for storage and shipping purposes but expandable for installation and use . a plurality of ribbons are ultrasonically welded to each of the panel edges , with the ribbon portions between edges being of substantially equal lengths , thereby maintaining equal spacing between the panel edges when the filter is in the expanded condition but allowing an easy collapsing of the filter for storage . forming a part of the disposable filter are pair of end plates , with each being adhesively attached to an end panel and having a pair of slots formed near their ends for attachment to a nondisposable support structure . the end panels are formed of multiple layers of paperboard which are adhesively bonded and compressed into a u - shaped structure that rigidly supports the filter in its expanded condition . the nondisposable support structure includes a pair of molded plastic side caps that fit over the respective ends of the filter planes and the end plates . each side cap has a pair of flanges at its opposite ends which act to maintain the filter in its expanded condition when the end plates are placed in abutting position therewith . each side cap also includes a boss which fits into a respective end plate slot to hold the end plates in their installed positions within the side caps .

in accordance with the present invention , there are provided compositions and methods useful for the in vivo delivery of substantially water insoluble pharmacologically active agents in which the pharmacologically active agent is delivered in the form of suspended particles coated with protein . in particular , protein and pharmacologically active agent in a biocompatible dispersing medium are subjected to high shear , in the absence of any conventional surfactants , and also in the absence of any polymeric core material for the particles . the procedure yields particles with a diameter of less than about 1 micron . the use of specific composition and preparation conditions , and careful selection of the proper organic phase and phase fraction , enables the reproducible production of unusually small nanoparticles of less than 200 nm diameter , which can be sterile - filtered . the particulate system produced according to the invention can be converted into a redispersible dry powder comprising nanoparticles of water - insoluble drug coated with a protein , and free protein to which molecules of the pharmacological agent are bound . this results in a unique delivery system , in which part of the pharmacologically active agent is readily bioavailable , and part of the agent is present within particles without any polymeric matrix therein .

apparatus similar to a weed - eater ® weed trimmer , but instead of monofilament line , it uses recycled coat hangers to cut weeds . there are two plates , the lower one having grooves within which to fit the coat - hangers after they are prepared using a special tool to bend them to the proper shape . aside from the cutting part , the rest of the machine can be like a weed - eater ® brand weed trimmer . the two plates are held together with a retaining nut . hardwire , wire cable , nails , or heavy duty plastic cord can also be used as blades .

a relief print master is created by a printhead that moves in a slow scan direction . the nozzles of the printhead jet droplets of a polymerisable liquid on a rotating drum . the different nozzles jet droplets simultaneously on different layers that have different diameters . as a result , the droplets jetted by different nozzles travel over different distances before landing . the effect of this is that the droplets undergo different position lag as they land on the different layers . by rotating the printhead in a plane that includes the central axis of the rotating drum and a nozzle row this effect can be compensated for .

this invention describes uv - stabilized step growth polymers such as polyesters , polyurethanes , polycarbonates , and combination thereof . the uv - stabilizing moieties present in these polymers comprise chemically bound , pendant ortho - hydroxydiphenyl ketone based moieties . the polymers are especially useful as protective films and fibers which are highly resistant to ultraviolet and sunlight degradation .

catgut suturing filament protected by a flexible polymer sheath that is slowly hydrolytically degradable and impervious to body fluid degratative enzymes . the sheath is prepared by coating the catgut filament with an isocyanate capped polyhydroxylated polyester followed by curing .

the invention relates to a method which is used to operate an injection molding machine for processing plastics , which has a mold closing unit for opening and closing an injection mold having at least one mold cavity in order to produce an injection molded part , an injection molding unit for plasticizing and injecting new plasticizable material into the mold cavity , and a control system for operating the injection molding machine . stored in the control system is expert knowledge about the operation of the injection molding machine and the peripheral devices of the latter which may possibly be present and about the production of injection molded parts using injection molding technology , in order to produce an injection molded part using interactive contact as needed by an operator by using injection molding parameters . the fact that , in further steps , information about the component or the mold cavity is provided to the control system means that the plant and process parameters required for the production of the injection molded part can be calculated by the control system before the first injection molded part is produced , such that an alternative procedure for the operator - friendly setting of a machine for processing plastics is made available .

this invention provides molded , biodegradable porous polymeric implant materials having a pore size distribution throughout the material which is substantially uniform . these materials can be molded into implants of any desired size and shape without loss of uniformity of pore size distribution . the implants are useful as biodegradable scaffolds for cell growth in healing of tissue defects . when manufactured to have an aspect ratio greater than about 3 , the implants can be further hand - shaped to fit the defect into which they are placed and the desired shape for the regrown tissue .

the present invention discloses a high throughput screening method and system , which can be used to screen a plurality of fluid samples to ascertain their corresponding information . for example , a polymer solution sample is screened to ascertain information about its micro structure character such as including its crystallinity property . the high throughput screen system comprises a plurality of sampling passages and one or more screening devices for screening multiple samples simultaneously or almost simultaneously to get their corresponding information so as to meet research requirement of the relevant field .

two thermoplastic tubes are welded together in a process which includes severing the tubes by a severing wafer having a temperature of about 350 ° f . to create two cut sections . the severing wafer is removed from the space between the tubes and a hot wafer having a temperature of 500 °- 1200 ° f . is inserted in the space to radiantly heat the tube ends so that they are welded when pressed - together while in an unflattened and open condition .

an extrusion pelleting process and apparatus is disclosed wherein the outermost portion of an extrusion orifice is surrounded by a heat reservoir maintained at a temperature significantly higher than the softening temperature range of the polymer being extruded . the high temperature heat reservoir constitutes a heat source from which individual extrusion orifices may be heated above the polymer &# 39 ; s softening range to assist in melting frozen plugs of polymer which may block the orifice from time to time . also disclosed is a heat flow control mechanism , in effect , for slowing the heat release from the reservoir to the individual extrusion orifices for economy of operation while still making available such high temperature source for unfreezing such plugs .