Shoe press belt
US6929718B2 · kind B2 · utility
5Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2003 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Sep 1, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2457
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a shoe press belt of a papermaking machine, the part of the paper web-facing layer in which water-holding grooves are formed is composed of a surface sublayer, having a relatively low hardness, and an underlying layer having a relatively high hardness. The higher hardness of the underlying layer prevents cracks from forming where the cross-sectional shape of the grooves tends to change as the belt is compressed. The lower hardness of the surface sublayer prevents the formation of cracks as a result of forces acting on the belt in the direction opposite to the machine direction at the nip location in a papermaking machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.