Patent · US Expired

Wet press for dewatering a material web with plural pressure pockets and unsymmetrical arrangement

US4661206A · kind A · utility

12Cited by

6References

13Claims

0Family size

Assignee

Sulzer-Escher Wyss GmbH · CH

Inventors

Peter Heitmann · Weingarten, DE
Herbert Holik · Ravensburg, DE
Peter Mirsberger · Weingarten, DE

Key dates

Filing date	Jan 28, 1985
Grant date	Apr 28, 1987
Priority date	—
Expiry date	Jan 28, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB30B9/241
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

In a wet press for dewatering a web of material, for instance a paper web, a contact pressure device is provided which presses against a rotating roll and exerts an incrementally increasing pressure in the direction of travel of the paper web. The contact pressure device comprises only a single pressure element arranged in the direction of travel of the paper web. The pressure element has two or more pressure pockets arranged sequentially in the direction of web travel and which are connected with a common pressure chamber by conduits. The increasing contact pressure is attained by arranging the pressure element unsymmetrically in relation to the pressure chamber. The effective pressure cross-sectional areas of pressure pockets arranged sequentially in the direction of web travel can additionally be reduced in the direction of web travel or the cross-sections of the associated bores can be increased.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.