Dryer sections with intermediate calendering in a paper machine

Details Dryer sections with intermediate calendering in a paper machine Dryer sections with intermediate calendering in a paper machine

1998-10-20

2000-05-23

Gravini, Stephen

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

D21F 500, F26B 1106

Patent

active

060652225

ABSTRACT:
A dryer section of a paper machine which is provided with at least one intermediate calendering nip and includes several successively arranged wire groups. The dryer section primarily or exclusively has groups with single-wire draw in which heated drying cylinders are arranged in an upper row and reversing suction cylinders or reversing suction rolls are arranged in a lower row below the upper row. The groups with single-wire draw also have a drying wire which runs along a meandering path over the drying cylinders and reversing suction cylinders or rolls so that the reversing suction cylinders remain inside the loop of the drying wire. A calender roll is arranged in opposed relationship to a drying cylinder in one or more of the single-wire draw groups in a sector which the first face of the web is exposed to thereby define a calendering nip therewith.

REFERENCES:
patent: 4163688 (1979-08-01), Kankaanpaa
patent: 4568423 (1986-02-01), Laapotti
patent: 5043046 (1991-08-01), Laapotti
patent: 5071513 (1991-12-01), Bluhm et al.
patent: 5127168 (1992-07-01), Pikulik
patent: 5163364 (1992-11-01), Bubik et al.
patent: 5551164 (1996-09-01), Brunmair et al.
patent: 5666741 (1997-09-01), Bubik et al.
patent: 5756156 (1998-05-01), Elijoki et al.
U.S. Patent Application Serial No. 06/134,418, filed Mar. 27, 1980 by John G. Edwards, "Apparatus for Press Drying".

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