Method and apparatus for producing welded metallic can body
US4352001A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Sep 25, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improvement in a method for producing a welded metallic can body. The method involves holding and pressing a lap portion of the side marginal portions of a can body-like structure, which has been formed by bending a metal blank into a cylindrical shape, along its entire length between a pair of opposing parallel wire electrodes placed on the opposing surfaces of parallel electrodes, and passing an electric current across the parallel electrodes for a predetermined period of time during the pressing to subject the lap portion to resistance welding. At least one of the parallel electrodes is divided longitudinally into two or more portions electrically insulated from each other, and an electric current is passed through at least one of them independently from the other portions so that the temperature rise in the lap portion of the can body-like structure becomes uniform. Also disclosed is an apparatus for producing a welded metallic can body in accordance with the aforesaid method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.