Method and device for guiding a leader of a web in a paper machi

Details Method and device for guiding a leader of a web in a paper machi Method and device for guiding a leader of a web in a paper machi

1993-03-05

1999-11-23

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162193, 1623603, D21F 302, D21F 700

Patent

active

059893931

ABSTRACT:
The invention relates to a device and method in a paper machine for guiding a web and in particular in guiding a leader of the web. The device operates in a paper machine in the area between a center roll of the press section and a separate press nip in the press section. The separate press nip is formed between a smooth-faced upper roll and a hollow-faced lower roll. Around this lower roll, a lower felt of the separate press is placed and runs from a suction-transfer roll placed at the proximity of the center roll as a straight run into the separate press nip. At the initial end of the straight run of the felt of the separate press nip, in connection with the guide roll, air-transfer devices are arranged, by whose means a reduced pressure is produced at least across the width of the leader in connection with a closing inlet nip between the felt and the leader and/or in connection with an opening outlet nip defined between the guide roll and the straight run of the felt.

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McDonald et al "A New Web Transfer System for Closing the Draw Between Last Press and Dryer Section" CPPA Annual Mtg, 1990.

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