Multilayer synthetic stopper
US6613406B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2000 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Feb 18, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A stopper for use in a substantially cylindrical bottle opening having a substantially cylindrical shape to seal the bottle opening and including a first polymer portion and a second polymer portion, wherein the second polymer portion coaxially overlies the first polymer portion. In another embodiment, the stopper includes a third polymer portion wherein the first polymer portion coaxially overlies the third polymer portion. A method of protecting liquid in a bottle with a substantially cylindrical bottle opening including providing a stopper having a substantially cylindrical shape to seal the bottle opening and closing off the bottle by insertion of the stopper into the bottle opening. A method of producing a stopper for use in a substantially cylindrical bottle opening comprising extruding a first polymer portion through an extrusion die, coaxially coating the first polymer portion with a second polymer portion to form a body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.