Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Patent
1993-02-19
1994-07-05
Jones, W. Gary
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
162274, 1623581, 162272, 100151, D21F 132
Patent
active
053264355
ABSTRACT:
The invention relates to a method and device in the crawling operation of a press felt in a paper machine. The press felt is passed as a closed felt loop through a nip defined between a center roll and a press roll in a press section of the paper machine. The felt is driven during the running operation of the paper machine by means of a nip drive between the center roll and the press roll of the press. When the paper machine is not operating, and the nip between the center roll and the press roll in the paper machine is open, the felt is moved, so as to moisten the new felt, by means of the crawling drive by rotating the drive roll. An axle of the drive roll is permanently connected to a drive rim. During the crawling operation, a drive wheel of a hydraulic device is brought into engagement with the drive rim. When the crawling drive of the felt is not in operation, the drive roll is switched to the free revolving position by shifting the drive wheel of the hydraulic device apart from the drive rim. The drive wheel is operationally connected to the drive rim.
REFERENCES:
patent: 4452668 (1984-06-01), Vallius et al.
Hirsimaki Martti
Suvanto Lauri
Villa Jouko
Jones W. Gary
Lamb Brenda Adele
Valmet Paper Machinery Inc.
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