Method of forming a contoured container
US5622070A · kind A · utility
39Cited by
9References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jun 5, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/2646
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a drawn and redrawn and ironed container having a contoured sidewall. A cup is blanked and formed from stock in conventional fashion. A profiled bottom may be formed in the cup during the redraw step. The cup is ironed using at least one ironing ring and an ironing punch having at least one recessed area for shaping the interior sidewall of the cup. When the cup is ironed, areas of extra material are formed on the interior of the sidewall where the recessed areas of the ironing punch were present. These areas of extra material are shaped during a spin forming step that creates the contoured sidewall of the can.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.