GB807490A - Apparatus for making paper or paper board or like fibrous product - Google Patents

Abstract

807,490. Fourdrinier or like paper-making machines. ST. ANNE'S BOARD MILL CO. Ltd. March 15, 1957 [March 30, 1956], No. 8709/57. Class 96. In the manufacture of paper, or paper-board, &c., pulp supplied between upper and lower walls 30a and 30b to a converging space G is squeezed between travelling upper and lower wire-cloths 21 and 16 passing about cellular rollers 22 and 17 which may be offset as illustrated or in vertical alignment and which may be suction rollers, and either of which may be horizontally and vertically adjustable. Each roller 17 or 22 may have a suction zone A or A1, for water-extracting, and a suction zone B or B1 for holding extracted water in cells 32 so that when it is thrown off by centrifugal force it is caught in an enclosure 41 or 42. A suction mouth 21 removes water pressed through the upper wire-cloth 21. In a modification, pulp is delivered to the upper fiat run of the lower wirecloth which carries it under the suction roller 22 and wire-cloth 21. A succession of plies may be formed, e.g. using a succession of upper wirecloths &c or alternatively a first ply may be formed in any known manner and one or more others formed as described Each suction roller 17 or 22 may comprise a shell 34 with longitudinal rows of perforations between each row of which is a radially extending partition 33 to provide deep cells 32. Each partition is notched to receive a helically wound strip (not shown in Fig. 2) the outer surface of which is flush with the outer edges of the partitions 33 to support a coarse wire-mesh cover embracing the roll and providing support for the forming-wire 16 or 21. The two wire-cloths 16, 21 may pass between a succession of wet presses each of which may be followed by a suction mouth The upper and/or lower roller 43, 45 of each press may be a plain or a suction roller. Specifications 748,597, 775,988 and 780,587 are referred to.