Patent GB-636946-A (GB)
Title: Improvements in winding mechanism
IPC: B65H18/16
Filed: 1946-12-02
Abstract: 636,946. Winding and measuring fabrics; severing devices. SAMCOE HOLDING CORPORATION. Nov. 2, 1946, No. 32589. Convention date, Dec. 13, 1945. [Classes 31 (i) and 42 (ii)j A fabric winding mechanism comprises a frame having a driven roll therein, a mandrel adapted to engage the driven roll and to support a roll of fabric as it is formed, guideways for the mandrel pivoted below their centres of gravity on the frame and movable to release the roll of fabric, and resilient means normally holding the guideways in upright position. The machine comprises a pair of side plates 5 in which a shaft 6, carrying a roll 7, is journalled. A two-speed drive is provided for the roll 7, the higher speed being the finishing speed of the fabric, and the lower speed being sufficiently low to permit cutting- off operations. The fabric 8 is caused to wind about a hollow cardboard core 11 supported on a mandrel 12, to form a roll 13 which is rotated by contact with the roll 7. As the mandrel rises, it is guided between bars 14 and 15 secured to the plates 5, on one side, and flanges 18 which are formed on members 19, pivoted at 20, and normally held in the upright position by springs 21. When in this position, angular extensions 24 prevent the extra mandrel 26 from moving down the guideways 25. Latches 16 permit the introduction of the mandrel, but prevent it from moving except upwardly thereafter. On the operator observing the approach of a seam 9, he reduces the speed of the apparatus and draws the mandrel 12 to the right, causing the members 19 to pivot and release the mandrel 26, which rolls past the catches 16 to contact the roll 7. When the mandrel 12 clears the ends of the members 19, on entering the notches 27, the members 19 return to their original position. The operator then cuts the fabric by means of a cutting mechanism consisting of a carriage running on rollers 30 and 31 engaging channel members 29 extending transversely of the machine, a blade 32 cuts the fabric as it is held on the flanges of the members 29 by the rollers 30. Yardage is measured by one of two measuring devices mounted on arms 39 of a swinging member 34, which is urged to one side or the other by a spring 37 having a toggle action. Each measuring device carries a pinion 41 which is adapted to be engaged with a gear 42 which is rotated by the shaft 6 through sprockets 44 and 46 and chain 45. The member 34 is notched at 56, the sloping surfaces being engaged by a pointed member 50 when the latter is raised by a roll passing over the end 49 of a lever 47 pivoted at 48, and causing its opposite end 51 to be raised. This causes the member 34 to swing over, the action being completed by the spring 37, to bring the alternative measuring device into operation for measurement of the next roll. For winding materials which tend to form tapered rolls, the flanges 18 may be replaced by toothed racks 18<SP>1</SP>, Fig. 6, and the mandrel may be replaced by rods 58 having pinions 58<SP>1</SP> engaging racks 181. The rods '58 are thus constrained to keep horizontal. Tubes, over which the pasteboard core for the roll is mounted, are supported on the rods 58 by means of ball-bearings. U.S.A. Specification 1,745,476 is referred to.