Methods for making an easy-opening can end
US6837093B2 · kind B2 · utility
21Cited by
17References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2002 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jul 12, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D17/4012
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for making an easy-opening can end comprising providing an upper die and a lower die, at least one of the upper die and the lower die having a curved surface with a radius of 0.1 to 1 mm at the tip portion thereof, the other die having a flat surface at the tip portion thereof; and press-forming an end panel by using the upper die and the lower die to form a score on the upper surface or the lower surface of the end panel so that the end panel has a thickness of 0.025 to 0.08 mm at the thinnest portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.