Method and apparatus for forming features in cans
US6311533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Apr 7, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/2646
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for mechanically reshaping and/or forming textured features in the side wall of metal can bodies in which a can body is mounted on a profiled mandrel and rolled along a second mandrel or rail, which is also profiled. The tools are made from hard material but the second mandrel or rail is resiliently mounted. This mounting has been found to facilitate control of the depth of the profiled features formed in the can body. In particular, the problem of depth variability which will arise due to expansion of the machine and tooling in normal running conditions, or variability in thicknesses in the can body is avoided. Typically, the can body is clamped between complementary unformed regions on the tools during forming so as to prevent wrinkling or localised thinning of the can side wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.