Closure cap with injection molded annular gasket and method of making same
US7740785B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 5, 2008 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | May 5, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/809
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A closure cap and method of making the same wherein an annular or ring-shaped gasket is injection molded onto the inner surface of a cap shell formed of plastic or metal. The annular or ring-shaped gasket includes at least one radially extending tab integrally formed therewith. A channel in the working surface of a mold core cooperates with the inside surface of the cap to form a mold cavity having the shape of the gasket to be formed therein. The cavity includes a melt inlet and a melt outlet which is in flow communication with a cold well through a connecting portion of reduced cross-sectional area with respect to the cross-sectional areas of both the gasket-defining mold cavity and the cold well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.