Can manufacture
US9849500B2 · kind B2 · utility
3Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2012 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Oct 4, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/28
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for manufacture of a metal can body is described in which two or more stretching operations are used so as to reduce the thickness of the central part of a cup base, prior to drawing the cup sidewall and forming a can body. By using two or more stretching operations, it has been found possible to control the thickness of the base without significantly reducing pressure performance of the finished can. Alternative embodiments of apparatus comprising tooling for carrying out this method are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.