Process for improving the planeness of a metal sheet
US6216521A · kind A · utility
4Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jul 23, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D1/05
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Process for improving planeness of a metal sheet, in which the sheet is stretched between two jaws for a period of time, applying a controlled permanent elongation of greater than 0.5%. Transverse pressure is applied on at least one face of the sheet during at least part of the period time during which stretching is applied with at least one longitudinally movable roll, or with a metal bar clamped to an opposite face of the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.