Method and apparatus for forming end panels for containers
US4715208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Oct 30, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/44
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a container end panel having a countersink radius and a chuckwall including preforming the radius and the chuckwall so that the chuckwall includes a straight wall portion tangent to the radius and reforming and reducing the radius without tooling restraint while holding pressure against the straight wall area. Apparatus for performing the method includes a punch core and a cooperating die core ring having complimental geometry for forming the chuckwall and radius configuration. The article formed by the method and apparatus includes an end panel having a straight wall portion between the normal tapered wall portion and countersink radius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.