Method of manufacture of a partially laminated rubber closure
US5484566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Mar 7, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2539/008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.