Shock-resistant easily-openable vessel closure
US4526287A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1983 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Nov 21, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2517/5083
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Disclosed is an easily-openable vessel closure comprising a can end member having a preformed opening and an easily-tearable opening tab arranged on the outer side of the can end member to cover the opening and adhere closely to the peripheral portion of the can end member contiguous to the opening, wherein the opening of the can end member has such a size and shape that the opening is longer in the radial direction of the can end member, the opening extends from the inside of a circle concentric with the can end member, which has a diameter 0.35 time the seaming diameter of the can end member, to the point close to the outer periphery of the can end member and the portion defined by the contour of the opening and said circle involves a circle having a diameter of 5 mm, and wherein a thermoplastic resin coating having a -shaped section is formed on the cut edge of the opening of the can end member and the contiguous peripheral portion of the can end member and the opening tab is bonded to the can end member through said resin coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.