Corrosion-resistant sheet steel weld
US4030525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Jul 18, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12292
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
To prevent flowing of coating material on corrosion-protected sheet steel, such as a zinc coating, when making overlap weld seams, the end portion of at least one of the steel sheets is formed with openings which extend from adjacent the outer edge of the end portion inwardly, to leave projections between the openings, the projections being entirely within the overlap and leaving a short strip of solid material in the overlap region, so that the weld will occur at concentrated hot spots of the material, and contamination of the welding electrodes by the zinc coating material is prevented. The openings may extend clear to the edge in the form of notches, leaving intervening teeth, or they may be punched holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.