D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
34/22, 92/21.2,
D21F 9/02 (2006.01) D21F 1/74 (2006.01) D21F 3/02 (2006.01) D21F 3/04 (2006.01) D21F 3/08 (2006.01)
Patent
CA 2040509
An apparatus and method is disclosed for reducing the water content of a formed web. The apparatus includes a press for pressing the formed web such that a first portion of water is removed from the formed web during passage of the formed web through the press. A dryer is disposed downstream relative to the press for drying the pressed web such that a second portion of water is removed from the pressed web during passage of the pressed web through the dryer. A further press is disposed downstream relative to the dryer for further pressing the dried web such that a third portion of water is removed from the dried web. The further press includes a heated backing roll and an elongate press member which cooperates with the backing roll for defining therebetween an elongate pressing section for the passage therethrough of the dried web. The dried web is subjected to increased pressure and temperature for an extended period during passage through the pressing section so that water vapor is generated within the pressing section for urging the third portion of water in the liquid phase away from the web, thereby inhibiting delamination of the further pressed web.
Metso Paper Inc.
Mitsubishi Heavy Industries Ltd.
Ridout & Maybee Llp
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