Pierceable closure for medicine bottles

Claim 2

A medicine bottle closure that can be stuck through, with a flanged cap and with a sealing disc which is made of at least two different materials and which is anchored on the front face of the bottle mouth, characterized in that a sealing disc 3 which seals the flat front face 5 of the bottle mouth 1a, which is made with a bevel-off 6 of its outer rim, consists of a layer, preferably of a Teflon disc 8 or of a similar foil, which covers the bottle opening and approximately half the bottleneck frontface 5 annular area delimited by its outer and inner diameters, and consists of an elastomeric gastight covering disc 7 which covers the bottle opening and the entire front face, upon the middle zone of which disc is applied the Teflon disc 8, and characterized in that this covering disc 7 carries at its outer rim, as an anchorage, a ridge 7b that fits the bevel 6 at the outer rim of the bottle mouth.

Claim 3

A closure, which can be stuck through, for medicine bottles, in accordance with claim 1, characterized in that the ridge 7b of the covering disc 7 is dimensioned, and preferably made somewhat wedge-shaped, so that after the flanging-in operation it is clamped tightly in position.

Claim 4

A closure, which can be stuck through, for medicine bottles, in accordance with claim 1, characterized in that the bevel angle of the ridge 7b is flatter than the bevel 6 at the bottle mouth 1a, and preferably the apex 7c of the ridge 7b in its undistorted state projects somewhat over the remaining diameter of the covering disc 7.

Claim 5

A cLosure, which can be stuck through, for medicine bottles, in accordance with claim 1, characterized in that the middle zone of the covering disc 7, which carries the Teflon disc 8 or the like, is surrounded by an annular groove 9.

Claim 6

A closure, which can be stuck through, for medicine bottles, in accordance with claim 4, characterized in that the Teflon disc 8 is drawn somewhat into the interior of the annular groove 9.

Claim 7

A process for the production of a sealing disc which consists of at least two different materials and is in accordance with one of the foregoing claims, and which forms a sealing disc which can be stuck through, for the closure of medicine bottles, characterized in that an elastic raw-rubber plate 7a, consisting of a rubber mixture having in its freshly prepared state an adhesive effect, is covered with a disc 8 of Teflon or similar foil having a roughened surface, and while still in a fresh state it pressed upon or applied upon it the said foil; and characterized in that in a second operation the side of the raw-rubber plate to which the Teflon foil is applied is laid in a press upon a circular cutting tool 20 having a greater diameter than the inner diameter of an annular groove 9 in the covering disc in its finished state, and is pressed under relatively high pressure until the elastic raw-rubber plate 7a is compressed to such an extent that the counterpressure becomes so great that the cutting tool cuts through the Teflon foil and the raw-rubber plate, after which, after relief of the pressure, the reascending diameter-decreasing covering disc blank 7a, with its applied disc 8 of Teflon or the like, now projecting over the inner diameter of the subsequent groove 9, is in a third operation brought to the final peripheral form (al, 22 22) of the sealing disc 3 and is subjected to a vulcanization operation, whereby the projecting edges of the applied Teflon disc become bent into the inner zone B delimited by an annular mold part f which forms the groove 9 in the sealing disc 3.

Claim 8

A closure, which can be stuck through, for medicine bottles, in accordance with claim 2, characterized in that the middle zone of the covering disc 7, which carries the Teflon disc 8 or the like, is surrounded by an annular groove 9.

Claim 9

A closure, which can be stuck through, for medicine bottles, in accordance with claim 3, characterized in that the middle zone of the covering disc 7, which carries the Teflon disc 8 or the like, is surrounded by an annular groove 9.

Claim 10

A closure adapted to be held in place over the opening in a container by a flanged cap comprising an elastomeric gastight covering disc 7, a layer 8 of Teflon secured to the inner face of said covering disc 7 confronting the container opening, said layer 8 being of a smaller diameter than the inner face of said covering disc 7 so that it completely covers the opening in the container and a portion of the container adjacent the opening therein and means defining an annular groove in the inner face of said elastomeric disc 7 adjacent the outer peripheral edge of said Teflon layer 8, said groove overlying the portion of the container adjacent the opening therein.

Claim 11

A closure adapted to be held in place over the opening in a container by a flanged cap comprising an elastomeric gastight covering disc 7, a layer 8 of Teflon secured to the inner face of said covering disc 7 confronting the container opening, said layer 8 being of a smaller diameter than the inner face of said covering disc 7 so that it completely covers the opening in the container and a portion of the container adjacent the opening therein and means defining an annular groove in the inner face of said elastomeric disc 7 adjacent the outer peripheral edge of said Teflon layer 8, said groove overlying the portion of the container adjacent the opening therein.