Method for the manufacture of a ring part out of sheet metal for a lid of a can
US6554556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 13, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S72/702
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
For the manufacture of a ring part out of a flat sheet-metal part to form a lid for a lid of a can. A hot-sealable coating is provided on one side of the sheet-metal part which is then shaped into a cylindrical tube with the coating being on the inside. The axially extending edges of the tube are joined together to form a butt-joint and the inside surface thereof pressed against a cooling plate. A butt-joint welding seam is then created by means of a laser jet. The tube is separated into equal length tube sections and each is conically enlarged at one end. The other end of each tube section is bent radially inwardly to form a bearing surface for a tear-off foil. By flanging the conically enlarged end, an annular flange is created to receive a body of a can.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.