Closure with integral self-sealing silicone valve and method for making same
US6050435A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Mar 28, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2401/15
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-sealing, tamper-evident closure including a cap body and an integrally-formed gasket valve is provided for use on a container. The cap body includes a tab integrally molded onto a removable frangible portion which breaks away from the cap body and exposes a self-sealing, flexible gasket valve. The gasket valve is molded in place on an inner surface of the cap body and includes a longitudinal slit to provide a dispensing orifice. A method for making a closure of the present invention is also disclosed, wherein an integral cap body is formed by injection molding, a quantity of liquid gasket material is deposited within a pocket formed on the cap body, a flexible gasket valve is formed by the liquid gasket valve material curing in place within the pocket and a longitudinal slit is imposed through the gasket valve to provide a dispensing orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.