Wet press nip with nonrotating adjustable belt exit guides
US4909903A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1988 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Mar 7, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F3/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A paper machine includes a double-felt (or single-felt) wet press. Two press elements, for instance two rolls, whose axes lie in a press plane, form a press nip with each other. Two endless felt belts, and between them the paper web from which the water is to be removed, pass through said nip. Beyond the press nip the paper web travels, free of the felt belts, to the next station of the paper machine. Each of the two felt belts travels beyond the press nip over a guide element, which can be a guide roll or a nonrotating deflector, whose position is displaceable parallel to the press plane. The arrangement is operated as follows: The angle between the paper web and the wetter felt is set to a smaller value during the initial licking-up process than during the subsequent continuous operation. On the other hand, the angle between the paper web and the drier felt is set to a larger value during the initial licking-up process than during the subsequent continuous operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.