Patent GB-454322-A (GB)
Title: Improvements in method of and means for winding a web of flexible material
IPC: B65H18/20
Filed: 1935-01-28
Abstract: 454,322. Winding webs. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (Cameron Machine Co. ; 61, Poplar Street, Brooklyn, New York, U.S.A.) Jan. 28, 1935, No. 2736. [Class 100 (i)] In a web-winding machine in which the winding is effected by two winding drums 1, 2, the web is led over the front drum 1 and thence over the rear drum 2 to the winding shaft 3, the front drum 1 is positively driven throughout the winding operation, and the rear drum is driven positively during the first part of the winding operation and thereafter is driven by the roll of material. The rear drum may be disconnected from its driving gear automatically upon the machine reaching a certain speed. In one form, Figs. 1 and 3, a gear 10 on the main shaft 9 drives a gear 11, fast on the shaft of the front drum 1, and also a gear 12 mounted between friction surfaces 16, 17 carried respectively by a sleeve 13 slidably keyed to the shaft of the rear drum 2, and a bracket 15. At slow speeds, springs 18 cause the gear 12 to be gripped bv the friction surfaces to drive the drum 2 positively. Upon the speed increasing beyond a predetermined value, weighted arms 19 pivoted to the bracket 15 swing outwardly, and slidable rods 21, engaging the arms 19 and the end of the sleeve 13, are pressed inwardly to move the sleeve against the action of the springs 18 to release the drum 2 from the drive by the gear 12. In another form, Fig. 19, the gear 12a driven by the gear on the main shaft is mounted frictionally on a hub 23 fixed to the drum shaft, the friction being sufficient to start the rotation of the drum. In other forms the gear may be connected to the drum shaft by manually operated friction or dog clutches. The initial rotation of the rear drum may also be assisted by overweighting the winding shaft 3 or the riding roller 4 or both at the beginning of the winding operation. The vertically slidable winding shaft carriage 31 is connected to an endless chain 28 the sprocket wheel 29 of which is fixed to a shaft 32 to which is also fixed a sprocket 33 round which passes a chain 34 carrying a number of weights 36. The riding roller 4 is also connected to a chain 38 carrying a number of weights 41. At the beginning of the winding operation, most of the weights 36, 41 act to increase the downward pressure of the shaft 8 and roller 4 and as the winding proceeds, the pressure due to these weights is progressively reduced. The surface of the rear drum may be roughened or provided with grooves as described in Specifications 155, 227 and 173,589, [both in Class 100 (i)], and this drum may also be placed at a slightly lower level than the front drum. During the period in which the drum 2 is driven by the roll of material, the drum may be braked to prevent undue tension in the wound roll, the brake being actuated by a connection to the winding shaft bracket 31 so that the pressure of the brake is gradually increased as the winding proceeds. Additional manually-operable brakes may be provided to brake both drums when the machine is stopped. The riding roller 4 may be driven by a belt pulley which may be fixed to the shaft of the rear drum so as to drive the riding roller always at the speed of the drum, or the pulley may be integral with or fixed to the gear 12, 12a on the rear drum so as to be driven at a constant speed, or the pulley may be driven through a clutch which is opened simultaneously with the disconnection of the rear drum from its driving gear.