a polyethylene utility case 10 shown in fig1 includes a lower section 12 and an upper section or lid 14 . the upper section 14 illustrated is customarily termed a &# 34 ; half - couch &# 34 ;, i . e ., it is formed as two separate portions , only one of which is intended to be opened when viewing the body . a parting line 16 shown in fig2 is generally offset from center to enable the longer portion of the lid 14 to be opened for viewing all but the legs of the deceased . this parting line 16 becomes a conventional sealed joint when the case is half - couch . the line 16 would not be visible from the exterior of the lid 14 if the case is produced as full couch . in that instance , mold inserts would be used to produce a unitary lid without the seam . since use of such inserts is commonly understood in the plastic molding industry , and since development of an appropriate seal along the parting line 16 is not pertinent to a complete understanding of the present invention , suffice it to say that the upper section or lid 14 may be either full or half couch . the lower section 12 includes horizontal and vertical barriers consisting of a bottom wall 18 , a pair of opposed side walls 20 and a pair of opposed end walls 22 . only one side wall 20 and one end wall 22 can be seen in fig1 . a plurality of inwardly - directed hand recesses 24 are formed around the case 10 into side walls 20 and end walls 22 for placement of the hands of pallbearers into the recesses 24 for lifting or hand - carrying the case . if desired , the recesses may be formed continuously as a single recess around the entire lower section 12 , enabling the pallbearers to position their hands along the sides as desired for best distribution of weight depending on the ability of the pallbearers to support the load . the recesses 24 are formed just below an outwardly - directed rail or ledge 26 located at the upper peripheral area of the lower section 12 . at least the lower section 12 , and preferably both the lower section 12 and upper section 14 , are formed from a family of high - density polyethylene thermoplastic material which is initially extruded in a heated plastic state into a tubular parison 28 . see fig5 which illustrates the blow - molding process in a very simplified fashion . the flexible parison 28 is positioned between opposing mold sections 30 and 32 of conventional blow - molding equipment 34 , pinched off at the top and bottom , and injected with pressurized air through at least one needle 36 . as is well appreciated in the art of blow - molding of plastics , the walls of the parison 28 expand and cause it to take the shape of the molding surfaces of mold sections 30 and 32 . for best aesthetics , these surfaces are textured to give the exterior of case 10 a pleasing appearance . the material color is optional , being that which is best suited to the needs of the funeral industry . as shown in dotted lines in fig5 the mold sections 30 and 32 are brought together and convert the section of the parison captured between the sections 30 and 32 into a hollow , double - walled structure which is a significant feature of the invention . referring back now to fig3 the double - walled structure formed by the blow - molding equipment 34 of fig5 is very simply shown as an outer jacket 38 and an inner shell 40 of the lower section 12 , and an outer jacket 42 and an inner shell 44 of the upper section or lid 14 . during blow - molding , the air injection needle 36 enters through inner shells 40 and 44 . when the sections have cooled and solidified and the needles 36 have been withdrawn , holes 37 ( fig9 ) remain in the inner jackets where the needles were . these holes 37 are utilized for purposes to be described later . the preferred material at the present time for the utility case 10 is a high - density polyethylene . it was this type of material which enabled the blow - molding process to achieve significant industry strides in the mid 1950 &# 39 ; s in the manufacture of bleach and detergent bottles . the liquid imperviousness of the high density polyethylene makes it quite suitable for burial use , avoiding leakage of body and embalming fluids into the ground water supply in areas around cemetaries . the plastic also keeps ground water out of the casket , giving added mental comfort to survivors of the deceased . all of this assumes that appropriate long - lasted seals are provided between the upper and lower sections and between the separate portions of the upper section in the case of a half - couch design . such seals can be separately formed of thermoplastic materials , ordinarily extruded , or can be integrally formed during the blow - molding process . in addition , the lower section 12 and upper section 14 are hinged together in conventional fashion along one side edge of the case 10 . this hinge can be separately formed of a polyethylene material and bonded to the sections 12 and 14 , or can be integrally formed if the sections 12 and 14 are simultaneously molded from a single parison 28 or a pair of side - by - side parisons . because of the size of the case for adults , twenty - six inches wide by eighty inches long to accommodate even an oversized body , i prefer to form the lower section 12 and lid 14 separately , then subsequently hinge and seal them with materials similar to the case material . the case 10 is approximately two inches wider and one inch longer than standard caskets used in the u . s . fig4 is an enlarged illustration of the area of fig3 within the dot - dash circle 4 . it further illustrates one type of resilient seal 45 which may be used between the lower section 12 and the lid 14 . fig6 and 7 show details of a locking mechanism 46 , fig6 being an enlarged frontal view of the elements within dot - dash circle 6 of fig2 and fig7 being a further enlarged cross - sectional view taken along lines 7 -- 7 of fig6 . either integrally formed on the exterior of the lid 14 and lower section 12 , or separately produced and cemented thereon are upper and lower bosses 47 and 48 , respectively . as seen , boss 48 is long and boss 47 is short . a capturing slide 49 is horizontally movable from its solid line position to its dotted line position in fig6 . when in the solid line position , the locking mechanism 46 is unlatched and the lid 14 is free to be raised and lowered . when moved to the dotted line position , the boss 47 is captured within a groove in slide 49 and the lid 14 is locked against the lower section 12 . as the slide 49 is moved rightwardly , the bosses 47 and 48 are cammed toward each other in conventional fashion with sufficient force to compress seal 45 and make the case 10 airtight . slide 49 is provided with and typical guide and way system 43 to retain slide 49 attached to boss 48 whether the casket is open or closed . since the particular locking mechanism is a matter of choice , further details have been omitted from the description . fig8 illustrates one type of hinge 54 which may be used between the sections 12 and 14 to enable the lid 14 to be moved between its open and closed positions . the hinge 54 can be extruded separately and bonded to the adjoining ledges at one side wall of the case , or can be a living hinge if produced in the molding equipment along with the sections 12 and 14 as a unitary case . if made separately , the hinge 54 and seal 45 can be made integral . fig9 is an enlarged section of a jacket 38 and shell 40 structurally strengthened by means of a stand - off 62 . this figure is of the portion within the dot - dash circle 9 of fig3 . also illustrated in fig9 is an injection needle 36 , which in actuality may be inserted anywhere and in several different positions through what is to become inner shell 40 , to expand the parison 28 and force its outer surface against the molding surfaces of the mold sections 30 and 32 . the parison is in a heated state at the time a number of such stand - offs 62 are formed between the outer jackets and inner shells . conventional protrusions 64 ( fig5 ) are provided in the mold section 32 . when mold sections 30 and 32 are brought together , the extending ends of protrusions 64 are spaced from mold section 30 less than twice the thickness of the walls of the parison 28 . this effects a fusing pressure at point 66 , welding the ends of the stand - offs 62 to the inside surface of jacket 38 . an air space 68 is thus created between the outer jackets and inner shells . the stand - offs 62 create fixing bridges between the jackets and shells , adding structural integrity to the sections 12 and 14 . the structural integrity inherent in the blow - molding process gives me a low cost light weight case 10 . lower weight is the result of using less material because of the thinner double walls . lower cost is a result of the reduced amount of material required , lower shipping expenses and the design advantages inherent when using blow - molded structures . the choice of high - density polyethylene enables the case and its contents to be cremated without atmospheric damage any more severe than air pollution from burning oil or other hydrocarbons . the selected material should be one which does not produce explosive gases and which results in minimal ash during combustion . i do not wish to limit the broadest aspects of my invention to the particular material i presently find to best suit the industry &# 39 ; s and environment &# 39 ; s needs . if the case 10 is produced as described , i can completely eliminate the need for metallic hardware such as the extra pallbearer handles or rails , hinges , locking mechanisms , etc . this simplifies the cremation process , which either requires removing the hardware or its being rendered useless if burned and separated from the ashes after creation . the final disposal of the deceased by burial or cremation having been discribed , let us now return to fig2 and consider the same utility case 10 used as a shipping container . if the casket is to be shipped via a passenger aircraft , most airlines will seek to disguise it by placing an inverted half - box 70 over the top , sides and ends of the container . this is commonly termed an &# 34 ; air tray &# 34 ;. not only does the air tray provide some protection against casket damage , but it keeps passengers from seeing the casket being placed on board . some individuals , especially those who dislike flying in the first instance or who may be superstitious , might feel uneasy having a corpse traveling with them to their destination . the utility case of my invention nicely accepts such an air tray half - box 70 , as shown in dotted lines . air tray 70 depends downwardly approximately to the upper level of upwardly - directed lateral recesses 72 formed in the outer jacket 38 . strapping 74 , preferably of burnable plastic , maintains the air tray 70 intact over the case 10 during shipment . by being burnable , if cremation occurs at the shipping destination without any viewing , the container can be cremated without removal of air tray 70 or strapping 74 , if desired . recesses 72 are also provided for forklift truck handling at the airport , if necessary . tines 76 of a forklift truck are shown in dotted lines in fig2 . recesses are wide enough between the ends of the case 10 to accommodate differently spaced forklift tines . the portions or legs of the bottom wall 18 outwardly of the recesses 72 have sufficient area to enable belt conveyance of the case 10 to and from the cargo bay of an aircraft . an alternate type of air tray 78 is depicted in fig1 . in respect of eliminating the need for the strapping 74 , it has certain advantages over the half - box of fig2 . in this version , a pair of openings 80 are provided in each elongated side 82 of the air tray 78 . the openings 80 are in alignment with lateral recesses in case 10 and , together with the recesses , accommodate the tines 76 of a forklift truck . if desired , the blow - molding process of producing the case 10 allows me to conform the bottom wall 18 of the inner shell 40 to the general shape of a reclining corpse , or to merely slightly incline the bottom from the head end of the case toward the foot end . for simplicity , i prefer to do the latter . either of these eliminates the cost of a standard bed system . if the body is to be viewed after air shipment , a pillow designed according to one teaching of my co - pending u . s . patent application ser . no . 08 / 045 , 653 , filed apr . 9 , 1993 may be utilized . the pillow would be placed in the case before the body . the pillow should have both its central and surrounding sections inflatable . they would be deflated during shipment and inflated , again without handling the body , prior to viewing . the pillow function would be to adjust the chin - to - chest relaxed appearance of the deceased for viewing . what has been described to this point should indicate very clearly that i have achieved a utility case which can serve for either burial or cremation . it can further serve as a shipping container , regardless of whether it is to be ultimately buried or cremated . this multiple use allows the same case 10 to initially receive the body , be shipped , allow for viewing , and either be buried beneath the earth or cremated , all without requiring further body handling by taking it from one container and placing it in another . in the instance where the special pillow of my copending patent application is also used , the head repositioning is done without even touching the body . by avoiding body handling after its initial placement in the case 10 , the advantages of refraining from such handling is obvious . in some countries , closed - casket viewing is provided by placing a window in the lid above the face of the deceased . this can be readily accomplished when using the blow - molding process according to my invention by forming an edge - sealed opening in the lid 14 and placing a window therein . although the outer jackets 38 and 42 of the lower section 12 and lid 14 , respectively , are liquid impervious throughout , it would be considered within the scope of the claimed subject matter if only the lower section ( or the lowermost portion of the lower section ) was made liquid impervious . this would advantageously prevent outward liquid seepage during shipment and after burial , but , under certain circumstances would still allow liquid entrance through the lid . the preferred form of the invention is to have both sections 12 and 14 liquid impervious at their exteriors . because the barriers or walls 18 , 20 and 22 are created as a double - walled structure via the blow - molding process , the inner shells 40 and 44 are inherently air pervious at completion of the molding . this is due to the use of the air injection needles 36 to expand the parisons 28 against the molding surfaces of the equipment 34 . this air perviousness provides the space 68 between the double walls to allow for expansion of body and chemical gases . the air injection holes 37 created by needles 36 can be enlarged or additional holes made in the inner shells 40 and 44 to allow for placement of materials in the space 68 between the walls . for example , odor - absorbing desiccants may be used . floral or other odor - producing materials , either liquid , granular or solid , can be positioned within the space . solid carbon dioxide , commonly called &# 34 ; dry ice &# 34 ;, may also be placed within the space for coolant purposes . while i prefer that both the lower section 12 and the lid 14 be blow - molded , either one may be made by another process . the lower section may be made according to my u . s . pat . no . 5 , 121 , 529 , for example . various other changes may be made without departing from the spirit and scope of the claims .
an environmentally - protective body container comprises a burnable double - walled utility case which can be used either as a shipping container and / or as a casket for burial or for cremation . the case is blow - molded from an organic thermoplastic which does not create explosive gases during burning and which leaves little ash or residue . at least the outer walls of the case are impervious to liquids , thereby preventing body and embalming fluids from contaminating the adjacent ground water supply in the case of burial . air injection holes created in the inner walls during the conventional blow - molding process make the inner walls air pervious and thereby provide expansion space for body gases between the inner and outer walls . use of a double - walled case also enables hand recesses to be formed into the lower section of the case and thereby eliminate the need for costly metallic pallbearing hardware . forklift truck recesses are conveniently molded into the bottom of the case to enable lifting and handling of the case while at least its top , sides and ends are surrounded by a corrugated air tray .