Container end panel forming method and apparatus
US4587826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1984 |
| Grant date | May 13, 1986 |
| Priority date | — |
| Expiry date | May 1, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/44
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for forming end panels of uniform thickness for use with two-piece containers. The method includes the steps of engaging the stock under fluid pressure and blanking it; wiping the periphery of the stock against the blanking die to form a lip extending in a direction substantially normal to the planar surface of the blank. While still maintaining pressure on the blank, further steps involve drawing the blank to form an edge area that extends above the top planar surface of the blank and has a cross-sectional configuration resembling an inverted letter J, and finally completing forming of the end panel by reverse drawing the central body portion of the blank in an upward direction to set a chuckwall between the central body portion and the edge area. The apparatus includes tooling for a double action shell press which is capable of engaging and holding down the work piece under fluid pressure while performing the blanking and drawing operations. The apparatus also includes profiling and reverse draw tooling carried by the bottom bolster of the press so that the contours or configurations of the end panel are formed from both sides, thereby avoiding, in the fina…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.