Ion nitrided creping doctor blade
US5849158A · kind A · utility
5Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/38
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Creping doctor blades useful for making soft tissues are substantially improved by ion nitriding the surface(s) of the doctor blade to produce a hardened surface while retaining the resilient interior of the non-treated blade. The resulting blades have approximately a three-fold increase in blade life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.