Extended nip press with displaceable center of gravity for the supporting force
US4713147A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1983 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Apr 29, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F3/0218
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An extended nip press for a paper machine for removing water from a wet paper, cardboard or similar fibrous or porous web. The press comprises a rotating press roll and at least one loading shoe, which is pressed against the press roll so as to form an extended press zone. The loading shoe may pivot around an axis parallel to the axis of the press roll. The web to be dewatered is passed through the pressing zone together with at least one felt that receives water. The loading shoe is supported onto the support frame by the intermediate of a support means. The center of gravity of the support force applied by the support means to the shoe is displaceable in the direction of running of the web to be dewatered for the purpose of adjustment of the pressure pattern produced in the press zone when different paper qualities are run. The displacing of the center of gravity of the support force is performed either mechanically by shifting the support means in relation to the shoe, or hydraulically by changing the pressures in the two separate pressure cushions in the support means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.