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

1997-08-25

1999-06-22

Bennett, Henry

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

D21F 302

Patent

active

059135875

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. Two calender rolls are arranged to form the calendering nip through which a paper web to be dried is passed, and thus calendered inside the dryer section, immediately preceding or following or within one or more of the dryer groups of the dryer section.

REFERENCES:
patent: 4163688 (1979-08-01), Kankanpaa
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), Brunnmair 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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