Method and apparatus for producing can bodies of a non-circular cross-section
US4947014A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/2676
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In order to produce can bodies having a noncircular cross-section, preferably a rectangular cross-section with rounded corners, flat planar blanks are initially deformed in a deforming station by a plurality of similar bending tools, each for producing one respective bend, whereby a respective different bend is made at the same time at the various blanks of the stepwise timed advancing blanks. The bending tool includes a shaping member held stationary at the inside and having a curved outer surface end, furthermore, a roller supported in a supporting body and which is subjected to the action of a spring pressing against the supporting body in order to bend the blank located between the shaping member and pressing roller upwardly during movement by a lifting rod pivotably mounted at the supporting body. This proceeds simultaneously in all bending tools provided for one respective bend by a movable part of the deforming apparatus operating as a press. The blank is moved stepwise from one to the next bending station, such that after a plurality of operating steps a can body having a rectangular cross-section and rounded corners is formed of which the free edges are interconnected in a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.