D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
92/15.3
D21F 3/00 (2006.01) B30B 9/24 (2006.01) D21F 3/02 (2006.01)
Patent
CA 1233053
ABSTRACT OF THE DISCLOSURE Apparatus for the press treatment of a fiber web in a long or extended press zone includes a first press fabric loop in which a press roll is situated and a press shoe situated within a press belt loop which acts in opposition to the press roll, the latter being supported on a transverse beam. The press roll and press shoe together form an extended press zone through which the web to be pressed is guided. The press shoe includes a pressure chamber iso- lated from the external environment by sealing members and to which a pressure medium, such as a fluid under pressure is passed. The pressure chamber acts within the extended press zone on the press belt. According to the invention, the pressure chamber of the press shoe comprises a hydrostatic pressure chamber which, when viewed in the direction of web run, is bounded at its front and rear by hydro- dynamic press shoes which function both as sealing elements for the hydrostatic pressure chamber and, additionally, as press-shoe members which produce compression pressures on the press belt and on the web.
438917
Marks & Clerk
Valmet Oy
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