D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 3/02 (2006.01)
Patent
CA 2051671
2051671 9014466 PCTABS00002 An extended nip press for papermaking machine extracts water from a web of paper on a forming felt (14) passing over a backing roll (15) employing electromagnetic repulsion forces. In one embodiment, a belt (20) is formed with permanent magnets which have thickness oriented poles and a like pole (30, 31) is provided external to the belt surface in non-contacting relation to provide a repulsion force to the belt which is transmitted by the belt to the felt and the paper. In another embodiment, the belt (20) is formed of current-carrying nonferrous material and a repulsion force is formed by inducing current to flow in the belt (20) by causing current to flow in an adjacent coil in non-contacting relation to the belt. In either embodiment, air pressure housing (40) may be positioned over the electromagnet (30) or conductor, to cool the electromagnet (30) and to apply an air pressure force against the belt (20) in the same direction as that of the induced or repulsion force.
Black Clawson Company (the)
Creagan Richard W.
Gowling Lafleur Henderson Llp
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