Method and device for reducing the rewetting of web material...

Details Method and device for reducing the rewetting of web material... Method and device for reducing the rewetting of web material...

D - Textiles, Paper

21

F

92/15.3

D21F 1/00 (2006.01) D21F 3/02 (2006.01)

Patent

CA 1229514

A b s t r a c t The invention relates to a method and a device for reducing the rewetting of a web after a press nip. The web to be dried is passed together with a press felt through a press nip formed by a first and a second press roll. The web and the felt are separated from each other after the press nip. For reducing the compressive pressure as quickly as possible after the center line of the nip, a mat made of a water- impermeable and resilient material is arranged to pass through the nip, said mat being in contact with the surface of either press roll and one of the surfaces of the web. After the press nip, the mat is subjected to a tensile stress, preferably by means of a second pair of rolls for preventing the returning of the mat to its original thickness starting immediately after the center line of the press nip. (Figure 1)

463766

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