Opening/closing device for a mouth of a container and process for making the same
US4801037A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 30, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Nov 30, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2251/0093
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
As opening/closing device to be provided at a mouth of a container such as a paper container, a bottle, a can, etc., in which a lid is provided via a hinge on the inside of a cylindrical pouring mouth made of synthetic resin and a gap space is formed between the pouring mouth and the lid. A metallic film consisting of a metal foil having synthetic resin layers coated on its both surfaces is bonded so as to straddle both the upper surface of the lid and the upper surface of the pouring mouth. Opening of the lid is effected by peeling of the metallic film, and upon closing the lid, the metallic film is pressed from its outer surface so that it may be stuffed in the gap space between the lid and the pouring mouth. Upon making the opening/closing device, an annular protrusion is formed on the top end surface of the pouring mouth, the metallic film is bonded to this annular protrusion and the lid so that the metallic film may be easily peeled off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.