Easily opened metal lid for a container
US5147058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1990 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Oct 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D17/404
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The lid for a sealed container openable along a line of reduced strength merely by exerting a pull is of the type comprising a substantially right-angles fold (4) constituting a line of reduced strength which is formed by a stamping operation on a sheet of steel having a thickness less than or equal to 0.16 mm. The line of reduced thickness permits the complete or partial opening of the container. The lid is preferably composed of 0.10 to 0.16 mm thick steel and, at the fold (4), the inside radius of curvature of the lid is 10 to 50 .mu.m and the outside radius of curvature of the lid is 100 to 200 .mu.m. The invention is applicable to sealed metal containers, such as food beverage cans or trays for pre-cooked dishes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.