Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1993-06-07
1995-01-31
Chin, Peter
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
1623591, 162375, 34 86, 34123, D21F 518, D21F 520
Patent
active
053856449
ABSTRACT:
A method and device for intensifying the operation of a Yankee press in a soft-tissue machine in which a web is pressed in one or several nips formed between a Yankee cylinder and one or more press rolls. The web is dried on the Yankee cylinder by blowing hot air introduced through the Yankee hood against the web. In the method, a blow device is used to blow hot and humid air against the web. The blow air for the blow device is taken from the outlet/heat recovery of the air system of the Yankee hood, and the exhaust air from the blow device is returned to the outlet/heat recovery of the air system of the Yankee hood. Air is blown against the web at the proximity of the nip formed between the Yankee cylinder and the first press roll, before and near the first press nip, in the running direction of the web. The blow device includes a blow chamber, an exhaust chamber, and blow nozzles for blowing hot and humid air against the web and exhaust-air ducts for the removal of the air.
REFERENCES:
patent: 1438511 (1922-12-01), Witham
patent: 1995999 (1935-03-01), Oman
patent: 3560333 (1971-02-01), Douglas et al.
patent: 4351700 (1982-09-01), Dove
patent: 5230776 (1993-07-01), Andersson et al.
Enkvist Jens P.
Hannus Lars H. M.
Chin Peter
Valmet Paper Machinery Inc.
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