D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
92/14.1
D21F 1/00 (2006.01) D21F 9/00 (2006.01)
Patent
CA 1157302
GOK 101-213 TWIN-WIRE WEB FORMING SECTION ABSTRACT OF THE DISCLOSURE An efficient and highly effective twin-wire web forming section utilizes and initial web forming section providing bidirectional dewatering over at least a portion of its length between a pair of dewatering bands passing over a forming roll, wherein the web in insufficiently dewatered to complete formation. In a subsequent dewater- ing zone over a second forming roll the direction of primary drainage is substantially reversed for at least a portion of the thickness of the web, and dewatering effected to the extent of completing formation of the web. The reversal of water flow has the effect of reforming the interior of the web, with consequent modification to formation. This aspect of the process of supplemented by the provision of a zone intermediate the initial web formation zone and the completed formation zone wherein relative longitudinal displacement occurs between the two bands so as to assist reforming of the web interior, with enhanced floc modification.
383379
Dominion Engineering Works Limited
Eckersley Raymond A.
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