Sheet metal surface treatment method
US5997955A · kind A · utility
0Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the purpose of preparing the sheet for deep-drawing and/or protecting it against corrosion, wherein an aqueous solution of polyethoxylates of one or more lanolin derivatives is applied to the said surface, the said surface is dried to obtain a deposit in dry state, then at least one operation of oiling is performed on the deposit in dry state. This process makes it possible in particular to simplify the operations of deep-drawing: even after prolonged storage, it is not necessary to re-oil the treated sheet just before deep-drawing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.