Method of manufacture of a partially laminated rubber closure
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United States of America Patent
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-
Jan 16, 1996
Grant Date -
N/A
app pub date -
Mar 7, 1994
filing date -
Mar 7, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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