Sizepress

Details Sizepress Sizepress

B - Operations, Transporting

05

C

32/53

B05C 3/00 (2006.01) D21G 9/00 (2006.01)

Patent

CA 1194289

ABSTRACT OF THE DISCLOSURE A size press comprises three coating rolls. These rolls are arranged in pairs to form two press nips. The paper web to be treated is passed through the press nips. Both sides of the web are treated in the nips. The uppermost roll is arranged as the centre roll of the size press. In connection with the centre roll the two coating nips are formed so that the first coating nip is placed at a short angular distance underneath the horizontal plane pass- ing through the axis of the centre roll. The second coat- ing nip is formed by the third coating roll, which is placed substantially in the vertical plane passing through the centre point of the centre roll or at a small angle downstream of the said plane. Upstream of the first nip, size-feed devices are provided on the centre roll side of the run of the web. These size-feed devices feed a first size pool or layer into the substantially vertical pit between the centre roll and the web. Upstream of the second nip, second size-feed devices are provided in the substantially horizontal pit formed by the centre roll and by the third coating roll. The second size-feed devices form the second size pool or layer at the opposite side of the web, as com- pared with the said first size pool or layer. The size-feed devices are so arranged that, as the sizing is performed, the web is supported by a roll face.

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