Pressing the web to the dryer in a dryer section

Details Pressing the web to the dryer in a dryer section Pressing the web to the dryer in a dryer section

1996-10-28

1998-08-04

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34120, D21F 500

Patent

active

057876037

ABSTRACT:
The dryer section of a machine for manufacturing a paper web includes at least one and more usually a plurality of heatable drying cylinders, each of which is wrapped over a part of its circumferential surface by the web of material to be dried. A support belt is guided by guide rolls to wrap over a part of the circumference of each of the drying cylinders and over the web. A pressing device presses against the support belt to press the web of material against the drying cylinder. That pressing device may comprise a pressure box outside the support belt to which air or steam pressure is applied. The pressure box may include several zones either along the web path or transverse to the web path permitting different pressures to be applied. The pressing device may alternately comprise a plurality of pressing rolls extending transversely to the web axis and parallel to the drying cylinder axis and being biased against the support belt, e.g., by springs, and supported on a support which moves the pressing rolls toward the support belt.

REFERENCES:
patent: 3206869 (1965-09-01), Justus
patent: 4194947 (1980-03-01), Houstila et al.
patent: 4738035 (1988-04-01), Grebe et al.
patent: 4750275 (1988-06-01), Sando et al.
patent: 4889048 (1989-12-01), Miller
patent: 4922627 (1990-05-01), Hernandez
patent: 5092962 (1992-03-01), Koski
patent: 5545295 (1996-08-01), Fujita et al.
patent: 5553392 (1996-09-01), Hanaya

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