Press unit of a paper machine for the manufacture of tissue pape

Details Press unit of a paper machine for the manufacture of tissue pape Press unit of a paper machine for the manufacture of tissue pape

1994-05-24

1996-03-19

Lacey, David L.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

1623591, 1623603, 162363, 162368, 1623581, D21F 1114, D21F 302, D21F 502

Patent

active

055000924

ABSTRACT:
The invention is directed to a press system of a paper machine for making tissue, including a crepe drying cylinder, a press roll with a smooth surface, an extended-shoe press unit, and a press roll fashioned as a suction roll or grooved roll. A first press gap is formed by the press roll with a smooth surface and the press roll designed as a suction roll or grooved roll. A water collection tub is coordinated with the suction roll or grooved roll. A second gap is formed between the press roll with the smooth surface and the extended-shoe press unit after which the felt leaves the periphery of the press roll with the smooth surface. Following thereafter, a third press gap is provided between the press roll with the smooth surface and the crepe drying cylinder. The felt does not pass through the third press gap.

REFERENCES:
patent: 3783097 (1974-01-01), Justus
patent: 4075056 (1978-02-01), Ely et al.
patent: 4144124 (1979-03-01), Turunen et al.
patent: 4705602 (1987-11-01), Dahl
patent: 4988410 (1991-01-01), Meinecke et al.
patent: 5092962 (1992-03-01), Koski
patent: 5120400 (1992-06-01), Laapotti
patent: 5230776 (1993-07-01), Anderson et al.
patent: 5308450 (1994-05-01), Braun et al.
Development of the Extended Nip Press by Justus, E. J. and Cronin, Dennis C., Tappi Engineering Conference, Sep. 30, 1981.

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