Paper machine and process
US6638395B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2000 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Jun 10, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F9/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Machine and process for at least one of producing and finishing a fibrous material web. The machine includes a press section, for dewatering the fibrous web, with a press nip, a former, located before, relative to a web travel direction, the press section for sheet formation, and a dryer section, located after the press section for drying the fibrous material web including a first dryer section having no more than three dryer cylinders. Two press rolls are arranged to form the press nip, and at least one press felt is located on each surface of the material web, such that the material web and the at least one press felt on each side of the material web are guided through the press nip. The fibrous material web is dewatered in the former to a dry content of at least approximately 18%, partially loops around the no more than three dryer cylinders, and is constantly supported from the former to an end of the first dryer group. The process includes dewatering the fibrous material web in the former to dry content of at least approximately 18%, dewatering the fibrous material web in only one press nip in the press section, and looping the fibrous material web around no more than three dr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.