| 摘要 |
The invention relates to a piston stopper (2) which is substantially made of rubber, comprising a piston section (8) which is enclosed in cap-like manner by an inert film (9') facing the contents of a syringe or carpule cylinder ( 1) and whose inert film (9') is located adjacent to the syringe or carpule cylinder (1). Adjacent to said piston section (8), the piston stopper (2) ha s a non-coated tight section (10). The invention also relates to a device and a method for the production of one such piston stopper (2). A non-vulcanized rubber sheet (7) is inserted into a form tool, together with an inert film (9). Under the effect of pressure and heat, an entire piston stopper contour is formed from said layered arrangement, extending as far as a flange (16) which protrudes laterally above the piston stopper (Z) in the region of the separating plane of the form tool. A receiving cavity (6) for a piston rod i s created in the piston section (8) which is enclosed by in a cap-like manner by the inert film (9). The wall area of the tight section (10) surrounding the receiving cavity (6) is forced into the receiving cavity (6). The piston stopper (2) is subsequently separated from the flange (16) in a stamping process, whereby a peripheral tight area (13), directly adjacent to the edge of the inert film (9') enclosing the piston section (8), is formed in the tight section (10).. |
