Method for expanding the diameter of a metal container
US9700929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | May 7, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/2646
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a metal container comprises: curling outward a top edge of the metal container to form a curl and expanding a diameter of a first section of the metal container to form a first expanded section; wherein at least part of the first expanded section is below the curl. In some embodiments, the steps of curling outward a top edge of the metal container to form a curl and expanding a diameter of a first section of the metal container to form a first expanded section are performed in a single stroke of a single die. In some embodiments, the step of expanding a diameter of a first section of the metal container to form an expanded section is performed after the step of curling outward a top edge of the metal container to form a curl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.