Multilayer synthetic stopper
US6248272A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a stopper for use in a substantially cylindrical bottle opening. The stopper has a substantially cylindrical shape to seal the bottle opening and includes a first polymer portion and a second material portion, wherein the second material 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. The invention also relates to a method of protecting liquid in a bottle with a substantially cylindrical bottle opening. The method includes 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. The invention also relates to a method of producing a stopper for use in a substantially cylindrical bottle opening. In one embodiment, the method includes extruding a first polymer portion through an extrusion die, coaxially coating the first polymer portion with a second material portion to form a body, and forming the body into a shape to substantially seal the bottle opening. The first polymer portion and the second ma…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.