Size press and method for coating a web therein

Details Size press and method for coating a web therein Size press and method for coating a web therein

D - Textiles, Paper

21

F

D21F 3/08 (2006.01) D21H 23/56 (2006.01)

Patent

CA 2113940

ABSTRACT A size press arrangement including a first roll mounted rigidly on a frame of the size press and a second roll which forms a size-press nip with the first roll. The second roll is mounted at a level higher than the level of the first roll and, on a loading arm that is supported pivotally on a transverse shaft on the frame of the size press. The loading arm is pivoted by loading cylinders so as to produce a desired pressure level in the nip and to open the nip for threading of the web and for replacement of rolls. The paper web is passed into the nip as guided by a guide roll and out of the nip over a spreader roll or an air-turning device. The rolls that form the size-press nip are arranged in relation to one another such that the nip plane passing through the rolls forms an angle of from about 35° to about 120°, advantageously from about 50° to about 60°, preferably 55°, in relation to the horizontal plane. The web is passed into the nip at an angle of substantially about 90° in relation to the nip plane and to be passed out of the nip at an angle of about 90° ? 7° in relation to the nip plane. -19-

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