Method of manufacture of a partially laminated rubber closure

Details Method of manufacture of a partially laminated rubber closure Method of manufacture of a partially laminated rubber closure

1994-03-07

1996-01-16

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264266, B29C 4318, B29C 4514

Patent

active

054845661

ABSTRACT:
A partially PTFE laminated rubber closure for pharmaceutical vials which resists undesired removal prior to placement of an aluminium over-cap on the vial and closure. The rubber closure includes a flat circular head which protrudes over the end of the pharmaceutical vial. Secured to the underside of the head is a cylindrical sealing portion which is partially laminated with PTFE at its lower end. Above the end of the PTFE on the outside of the sealing portion is a protruding ring of rubber. This ring allows good high friction contact between the closure and the vial which prevents the closure from dislodging during transportation of the vial after application of the closure and prior to application of an aluminum overcap. A method for making the closure is also provided.

REFERENCES:
patent: 3755031 (1973-08-01), Hoffman et al.
patent: 3760969 (1973-09-01), Shimamoto et al.
patent: 4075266 (1978-02-01), Theysohn
patent: 4441621 (1984-04-01), Matukura et al.
patent: 5288560 (1994-02-01), Sudo et al.

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