GB359594A - An improved method of and means for delivering stock to the web-forming parts of machines for making paper and like substances - Google Patents

Abstract

359,594. Delivering stock in machines for making paper &c. DEHN, F. B., 103, Kingsway, London.-(Beloit Iron Works; 2nd Street, Beloit, Wisconsin, U.S.A.) July 30, 1930, No. 22995. [Class 96.] In a paper-making machine of the type in which the stock is applied to the web-forming element with the aid of a rotating cylinder having delivery orifices, a stock feed pipe 39, Fig. 7, within the cylinder distributes the stock lengthwise thereof. The stock supply passes through a screen or screens of the end delivery type, arranged for compactness, to one or both ends of the pipe 39 which is stationary within the rotating cylinder 12, the stock flowing through one or more openings 44 extending substantially the length of the cylinder 12, additional openings 45 preventing collecting of fibres in the bottom of the pipe 39. The cylinder 12 extends through end walls 18, and is supported by rollers. Packing between the walls; and the cylinder comprises rubber strips of rectangular cross section or compressed rubber strips between rubber adapters. A head of stock formed within the cylinder 12 flows through holes 50 countersunk at both ends and through adjustable gates 24, 25 to the forming wire 14, the front gate 25 having an independently adjustable, flexible lip 26. The cylinder 12 is cleaned by sprays of water &c. directed from the inside from a spray pipe 57 or from the outside, and by wipers 58, 59 of rubber &c. ; the residue may be collected by a trough 61 discharging at one or both ends. In an example a Fourdrinier machine 150 inches wide operates at 200 to 400 feet per minute, the cylinder 12 being 24 inches outside diameter and rotated at 2 to 6 revolutions per minute. With high speed machines the cylinder 12 is located considerably above the wire and delivers stock downwardly through a passage which converges laterally and curves forwardly towards an adjustable orifice. Fig. 12 illustrates the invention applied to a cylinder machine.