Calender for the treatment of a paper web
US5655442A · kind A · utility
7Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1996 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Mar 7, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G1/0233
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A calender having one stack of rollers has a working nip formed between a hard roller and a soft roller. A changeover nip is formed between adjacent soft rollers. The changeover nip is arranged approximately in the center of the roller stack. The cumulative weight of the rollers is such that the sum of the loads per unit of length of the working nips disposed above the changeover nip is at least 80 percent of the sum of the loads per unit of length of the working nips disposed below the changeover nip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.