Single-tier drying section tailored for compensating stretching

Details Single-tier drying section tailored for compensating stretching Single-tier drying section tailored for compensating stretching

1997-01-21

1998-04-28

Bennett, Henry A.

Drying and gas or vapor contact with solids

Process

Gas or vapor contact with treated material

34117, 34118, 34121, D21F 500

Patent

active

057430241

ABSTRACT:
A paper making machine comprises a press followed by an adjoining drying section having a plurality of dryer groups. Each dryer group comprises only one row of dryer cylinders and one row of suction rolls then therebetween. The press section in each of the dryer groups has a respective variable web speed drive. A speed control device controls the drive such that a positive difference in speed is always present between the first dryer group and the press and also between the second dryer group and the first dryer group. Open draws may be defined between at least some of the dryer groups.

REFERENCES:
patent: 4875976 (1989-10-01), Wedel
patent: 4982513 (1991-01-01), Loser et al.
patent: 5311672 (1994-05-01), Kotitschke et al.
patent: 5355593 (1994-10-01), Kotitschke
patent: 5467534 (1995-11-01), Salter et al.

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