Patent GB-271276-A (GB)
Title: Improved apparatus for moire finishing or for breaking cloth
IPC: D06C23/00
Filed: 1926-07-02
Abstract: 271,276. Lyth, J. J. July 2, 1926. Embossing-machines.-In apparatus for moirÚ finishing cloth by passing two layers of cloth over parallel guides which are reciprocated simultaneously in opposite directions, and then pressing the superposed layers between calendering-rollers, the relative reciprocation of the guides is effected by a motor acting directly on one or both of them. A moirÚ finish may also be obtained by reciprocating only one of the guides, or one of the layers of cloth may be held against lateral movement by passing it over a supplementary roller which holds it out of contact with the reciprocating guides. A layer of cloth may be broken by threading it around a series of closely spaced guides arranged in pairs which reciprocate in opposite directions. The cloth guides 13, Fig. 1, comprise cylindrical shells 14 axially secured upon a screwed spindle 15 by end caps 16 which are locked against rotation by nuts 18 or other means. The spindles 15 are preferably provided with pointed ends 19 and at one end are provided with a circumferential groove 20 to receive a tangential pin 26 by which they are rotatably connected to pistons 23 reciprocable within cylinders 24 in a block 25. Alternatively the spindles may be rigidly secured to the pistons, the latter then rotating with the spindles when the fabric passes over the guides. A frame 22 at the left-hand end of the guide rollers supports a rocking shaft 27, Fig. 4, to the ends of which the central bosses of two levers 28 are keyed, and the ends of the levers 28 are connected by links 32 to the ends of two stirrup blocks 36. The ends of the spindles 15 are pivotally secured within the blocks 36, so that the axial movement of one guide roller to the left produces, through the levers 28, a corresponding movement of the other roller to the right. Steam or compressed air may be used as the motive power, admission to the two cylinders 24 being controlled by a double piston valve 40 within a cylinder 39 which is connected by a port 43, Fig. 6, to a supply pipe 42. The port 43 is disposed midway between two ports 44, 45 respectively connected to the cylinders 24, the admission and exhaust being controlled by the piston valve in known manner. The reciprocation of the piston valve is obtained by connecting it by means of a stem 50 to an arm 53 strapped upon the end cap 16 of one of the cloth guides. The stem 50 is provided with a sleeve 52 slidable within a hole in the arm 53, the length of the sleeve being greater than the thickness of the arm 53 in order to provide a lost motion to limit the amplitude of the valve relatively to the spindle 15. Lock nuts 54 are provided to adjust the position of the sleeve 52 on the stem 50. Cushioning of the pistons is obtained by adjusting the valve to close the inlet and exhaust ports simultaneously. To enable the mechanism to be lubricated whilst in motion a lubricant reservoir 55, Fig. 1, preferably of the compression type, is mounted upon the frame 22 and communicates by a duct 56 with the bearings of the rocking shaft 27. A circumferential groove 57 on the shalt 27 communicates with an axial hole 59 therethrough leading to branch ducts 60 in the moving members adjacent thereto. At the other end the spindles 15 carry lubricant reservoirs 70 communicating through an axial bore 69 with the pistons 24 and the ends of the spindles.