Patent GB-166246-A (GB)
Title: Improvements in or relating to machines for cutting weft-pile fabrics
IPC: D06C13/08
Filed: 1919-09-01
Abstract: 166,246. Drey, Simpson, & Co., Ltd., Drey, O., and Byrd, H. L. Sept. 1, 1919. Pile, cutting.-In machines for cutting weft pile fabrics, of the kind described in Specifications 8906/99 and 20954/03, wherein the fabric is operated upon in an endless condition, the forward movement of the fabric 2 is effected by a drawing-roller 4 on a shaft 5, and drawing-rollers 6, 7, 8 geared to this shaft, which is connected by belt gearing 20 to a subsidiary motion shaft 14, from which the various other motions of the machine are driven. The belt 20 alone is unable to overcome the load on the shaft 14, which only rotates when assisted by the pull of the fabric, this being sufficient for the purpose only when there is not slack between the drawing-rollers and the shaft 14. The fabric passes round a roller 13 on the shaft 14 and round rollers 11, 12 geared to the shaft 14. The belt 20 is somewhat slack and may be acted upon by a jockey pulley 21 on a lever 22, which pulley tightens the belt when the fabric is moving forwards and slackens it when the fabric is moving reversely. The machine is started and stopped by means of a treadle 54 connected by lever-mechanism to a belt-shifter for moving the driving-belt for the front shaft 5 or to a clutch-controlling device, and to a brake acting on a pulley on the back shaft 14, or to two or more brakes adapted to come into action in succession. Reversal is effected by depressing a cross member whereby a driving-belt is moved from a loose to a fast pulley on the shaft 14, which serves, during reversal, to effect all the movements of the machine, including the travel of the fabric. The fabric passes from the roller 8 to a pendulum folding device, the folds formed thereby passing down an incline 42, round a foldreversing roller 40, to a creeper 10 comprising a series of endless ropes &c. or a rope &c. passing over grooved rollers 37 - - 40, the roller 37 being provided with cam-like discs 41 for straightening out the descending folds, whilst the roller 39 is mounted in bearings supported by bell-cranks acted upon by adjustable springs or weights. The fabric then passes over a cross-bar 71 carried by spring-controlled levers over a roller 75 mounted in inclined slots 76, thence over or around bars or rollers 77 - - 81 mounted on the frame of the machine, and rollers or bars 82, 83 mounted in a spring-controlled frame 84, which is normally kept in the position shown by the tension of the fabric, but when the travel of this is reversed, the frame falls and carries a part of the fabric between the bars &c. 77, 82 across the bar 71, thus bringing two oppositely-travelling portions of the fabric into contact with one another and ensuring the taking-up by the frame of the slack or accumulation of fabric due to reversal without drawing fabric from the folds on the creeper. Slack occurring between the folding-device and the roller 8 is taken up by a bar 86 carried by pivoted arms 87 acted upon by weights or springs. The folding-device is oscillated by a connecting rod and crank-pin on a pulley driven from the shaft 14 by rope gearing, the rollers of the folding-device being driven by rope gearing from the shaft 14. A pivoted adjustable seat for the operator is provided at the front of the machine.