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

1996-06-11

1999-04-20

Bennett, Henry

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

D21F 500

Patent

active

058946799

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. In one representative embodiment, at a drying cylinder situated inside the group with single-wire draw or in connection with the last drying cylinder in the group, a free space is arranged in which a calender roll is arranged to form the calendering nip together with the drying cylinder in the group with single-wire draw through which a paper web to be dried is passed and, thus, calendered inside the dryer section.

REFERENCES:
patent: 4568423 (1986-02-01), Laapotti
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.
U.S. application No. 06/134418, John G. Edwards, filed Mar. 27, 1980, "Apparatus for Press Drying".

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