The invention relates to a dispenser or an assembly suitable as a dispenser, serving as a receptacle, reservoir and/or discharger for media which may be liquid, pasty, powdery and/or gaseous. All components of the dispenser or assembly may be made of plastics or as compression or injection molded components. For discharge the dispenser can be freely held and simultaneously actuated single-handedly. Its length thus amounts to max. 10 cm or 7 cm, its largest width not more than 8 cm or 5 cm. The dispenser is suitable for dispensing single droplets of the medium, a jet or atomized particle or droplet aerosol thereof. Furthermore, the dispenser may be configured for discharging but a single dose of the medium or for a single stroke with no return stroke or for repeated discharges each with a spring-actuated return stroke inbetween.
Experience has shown it to be expedient to compose complicated assemblies of components molded separately which during molding are located with or without a direct joint spaced away from each other or in a position other than that required in the operating condition. Reference is made to the German laid-open document 196 05 153 as well as to the pending German patent 198 13 078.3 in including the features and effects described therein in the present invention.
The invention is based on the object of providing a dispenser or a method of producing an assembly for a dispenser or the like which avoids the disadvantages of known configurations. It is more particularly the object to provide assemblies which have an increasing or decreasing inner or outer cross-section in the opposing direction. The dispenser is intended for facilitated production and safe operation.
In accordance with the invention two or more components are produced at the same time or with the same flow of plasticated material, immediately demolded once solidified or released in some other way at their jointing zones and then directly positioned relative to each other so that they can then be combined into an assembly. For the components the same material or differing materials may be employed. The components pass through the same temperature curves at the same time up to solidification and may have the same or differing volume of material. Expediently the components are produced in the same mold or so that they adjoin one or more common parts of the mold each integrally. This applies more particularly to the jointing surface areas of the components moldable juxtaposed in common by a movable part of the mold. After the components have solidified and subsequent retraction thereof or of another part of the mold these jointing zones are located exposed. The components can then be moved relative to each other until joined together and demolded completely where necessary. It is good practice when the components are located in production axially parallel or directly juxtaposed almost in contact with each other. Once the one component has been joined to the other it forms an elongation of the other component in the direction of its greatest extent. After being joined, forming the operating condition of the assembly for operation of the dispenser, the two components merge into a length which is smaller than the length of the one or other component. The components may, however, also be face joined without any mutual longitudinal engagement and locked in place mutually by a further component. Thus mutual locking of the components may be with zero clearance or positive, namely by being radially centered or by a captive lock.
Although the configuration in accordance with the invention is suitable for the outer or base bodies of dispensers it is particularly expedient for core bodies. One such core body is located totally concealed in the interior of the dispenser of the corresponding base body, e.g. within a discharge nozzle. This base body may also form the third component for the cited locational lock. Advantageously one or both components of the assembly forms longitudinally a middle section of largest outer width, w adjoining at each end thereof an end section of comparitively reduced outer width. Each of the end sections is formed by another component. An end section may be a hollow needle having a smallest diameter at the tip of the needle of less than one millimeter and a length of less than 10 or 8 mm. The other end section may be a dished, fluted or outer face-recessed body having a radially protruding collar forming the shorter longitudinal part of the middle section.
The two components are advantageously joined to each other via a single connecting member or link directly joining each of the components by a link section. The link sections are then mutually movable and adjoined by a connecting location which may remain stationary in mutual movement of the components such as in movement of the corresponding link section relative to the corresponding component. The connecting location is expediently a hinging zone having a sole hinging axis and/or a designed frangible location at which the link sections are parted in mutual movement of the components and prior to attaining the operating position in forming opposing fractured surface areas. The mold cavity for the link may form the one or sole flow channel via which the plasticated material flows from the mold cavity for the one component, more particularly the larger volume component, into the mold cavity for the other component. The smallest cross-section of this channel and thus of the link may be less than 5, 2 or one tenth of a mm2.
In production the jointing surface areas of the two components later to directly adjoin in the operating position are expediently located in the same plane. Beyond one of these jointing surface areas a locking member or the like may protrude. In production these jointing surface areas may point in the same direction or in opposite directions. Up to each jointing surface area the link may also extend which may comprise a surface directly translating into the jointing surface areas in the same plane or frangible or parting surface areas in this plane after parting. The components may also be translated by a radial or linear movement into their operating position, the one component forming a sliding guide for the other component flanked only at the bottom and sides which, however, does not attain the guide until after a first portion of the shifting travel or after the link has been parted. In addition, the components may be produced separately and then assembled in accordance with the invention.
Irrespective of the configuration as described, the dispenser is configured more particularly as a receptacle and reservoir for biological active substances over several weeks, months or even years. These may be physiological active substances containing hormones and/or cleavage products such as peptides containing protein. Such biological information transmitters which may contain amino acids and other similar active substances may be highly sensitive to moisture, this being the reason why they are held in the dispenser in a pressure-tight chamber which is not opened until immediately prior to delivery from the dispenser, e.g. by a closure being ruptured by means of the cited assembly.
These and further features of the invention also read from the description and the drawings, each of the individual features being achieved by themselves or severally in the form of sub-combinations in one embodiment of the invention and in other fields and may represent advantageous aspects as well as being patentable in their own right, for which protection is sought in the present.