D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
92/21.4
D21F 3/10 (2006.01) D21F 1/50 (2006.01) D21F 3/04 (2006.01)
Patent
CA 1059356
ABSTRACT OF THE DISCLOSURE: In the press or web dewatering section of a paper- manufacturing machine, rotary suction-roll means for guiding a travelling fabric means adapted to support a web while being partially lapped thereby over a first sector thereof, the suction roll means comprising a solid, non-perforated inner portion and a circumferentially extending outer portion, the outer portion ha- ving circumferentially extending channels formed therein, jacket means situated at the exterior of the suction-roll means and de- fining with a second sector of the suction-roll means comprising substantially the entire exterior surface thereof which is not lapped by the web, a hollow region bounded by an inner surface of the jacket means and the suction-roll means second sector. The jacket means has opposed longitudinal edge regions which extend substantially parallel to the axis of the suction-roll means and opposed end walls which extend between the edge regions, the jacket means carrying along the edge regions end walls sealing means engaging the suction-roll means to an extent sufficient for maintaining the hollow region substantially closed off from the outer atmosphere while communicating with the circumferentially extending channels, and suction means operatively connected with the jacket means for maintaining the hollow region at a reduced pressure substantially less than atmospheric pressure to provide through the hollow region a pressure in said channels which is suf- ficiently low to cause air flow through said fabric means inwardly into said channels. And, a method of subjecting a fabric travel- ling over a suction-roll to a suction effect.
286572
Kankaanpaa Matti
LandOfFree
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