Press section arrangement

Details Press section arrangement Press section arrangement

1979-03-19

1981-03-24

Smith, William F.

Paper making and fiber liberation

Apparatus

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

162360R, D21F 304

Patent

active

042578442

ABSTRACT:
A paper machine press arrangement for receiving a paper web from a forming wire and carrying the web through at least two non-suction press nips and, for example, a dryer section. A first press nip is defined by a first grooved roll and a first controlled crown grooved roll. A second press nip is defined by a relatively large diameter plain press roll and a second grooved roll. In certain embodiments, a third non-suction press nip is included and is defined by the large diameter press roll and a second controlled crown grooved roll. A first felt wraps a suction pickup roll positioned in working relation to the forming wire and picks up the web on the underside of the felt and carries the web through at least two non-suction press nips. The second felt contacts the web prior to the first press nip and supports the web through the first press nip and is then guided downwardly away from the subsequent press nips so that any broke may be dumped without shutting down the machine or accumulating broke. The web is carried away from the second felt on the underside of the first felt with the aid of a suction transfer roll and is carried to the second non-suction press nip. The first felt is guided away from the web after the second press nip back to the forming wire. The web adheres to the outer surface of the plain press roll and is carried therefrom to a dryer or to the third non-suction press nip whereat a third felt contacts the web to guide the web through that work station. The third felt is then guided away from the web, while the web is appropriately directed for further processing, such as to a dryer section.

REFERENCES:
patent: 3198695 (1965-08-01), Justus
patent: 3198697 (1965-08-01), Justus
patent: 3268390 (1966-08-01), Ely, Sr.
patent: 3276102 (1966-10-01), Justus
patent: 3595745 (1971-07-01), Cronin
patent: 3861996 (1975-01-01), Dorfel
patent: 4016032 (1977-04-01), Kankaanpaa
patent: 4075056 (1978-02-01), Ely et al.
patent: 4086131 (1978-04-01), Rempel et al.
patent: 4188262 (1980-02-01), Kankaanpaa

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