Patent GB-170050-A (GB)
Title: Improvements in hide working machines
IPC: C14B1/10
Filed: 1920-06-10
Abstract: 170,050. Hutchinson, A. A. June 10, 1920. Rotating-tool machines.-Relates to hide working machines of the kind described in Specification 2477/05 and in which one or more feed rolls co-operate with a hide-supporting roll to draw the hide between an oppositely rotating bladed cylinder and a freely rotatable bed roll, the hidesupporting roll being mounted in a pivoted rocker frame, whilst the bed roll is mounted in a second frame adapted to swing about the axis of the hide-supporting roll, means, comprising a fixed projection positioned in a cam slot in an extension of the second frame, being provided to hold the bed roll in operative relation to the bladed cylinder when the hide supporting roll is rocked into operative position. The invention comprises an arrangement in which the bed roll is provided with a thick yieldable covering into which the hide is pressed by the blades and which on removal of the hide is directly engaged and rotated by the bladed cylinder. In the arrangement in Figs. 1 to 3, the rotary tool 13. mounted in fixed bearings, is driven at one end 13<x> by a main belt 72, and transmits motion to other parts of the machine through a pulley 68 on the other end 69 of its shaft. The hide supporting roll 40 is carried at each end in a rocker frame 43 pivoted to the uprights 10, 11 at 44, and co-operates with a pair of spring-pressed feed rolls 17, 29 to grip the hide as shown in Fig. 3 and draw it past the tool cylinder 13. The bed roll 83 is resiliently mounted at each end in a secondary frame 80 swinging on the trunnions of the hide supporting roll 40, and formed with an extension 100 having a cam slot 107 engaged by a, roller 108 on a shaft 109 mounted in fixed bearings, so that when the rocker frames 43 are moved about the pivots 44, the bed roll 83 is moved substantially horizontally to and from the knife cylinder 13. One side of the cam slot 107- is formed by a curved plate 103 secured at one end to the part 101 and at the other end formed with a flange 104 having a turned end 105 in which is threaded a screw 106 whereby the width of the cam slot may be adjusted. The feed rolls 17, 29 are pressed into action by springs 22, 31 on rods 18, 27 slidably mounted in brackets 20, 25, the tension being adjusted by nuts 21, 30 in conjunction with stop nuts 23, 32. The bed roll 83 is similarly mounted in the swinging frame 80, being pressed into action at each end by a spring 89 on a rod 87 slidably. mounted in a bracket 85, adjusting nuts 88, 90 being provided. A detachable angle bracket 92 carrying a rubber stripper 97 and arranged as shown in Fig. 4 is secured between nuts 91 on the rods 87. Rotation is transmitted from the pulley 68 on the tool spindle 69 through a belt 67 to the shaft 66 and thence to a pinion 59 on the trunnion of the hidesupporting roll through the gear train 64, 63, 62, 61, 60, the face of the pinion 59 being formed with lugs 146 engaging loosely an arm 147 on the trunnion 42 allowing play in taking up the drive to facilitate engagement of a pinion 37 on the opposite end of the hide-supporting roll, with pinions 36, 38 on the feed rolls 17, 29 which are driven thereby. The pivoted frames 43 carrying the hide-supporting roll are counterweighted by levers 77 carrying adjustable weights 78, and are thrown into and out of action in the usual manner by a treadle-operated half-revolution gear device. For this purpose the frames 43 are connected through adjustable links 47, 48 to crank discs 48<x>, 110 carried by the shaft 109 the ends of which pass through the cam slots 107. The disc 48x is engaged by an adjustable brake ring 51, preventing undesired movements, whilst the crank disc 110 is secured to a pinion 113 adapted to be driven by a gear 114 carried by a rocking arm 115 pivoted at 116, the drive being transmitted through intermediate pinions 122, 121 from the pinion 64 on the spindle 66. The lever 115 is normally pressed out of action by a, spring 125 and is rocked to throw the pinion 114 into engagement with.the pinion 113 by depression of a treadle 139 which operates through a lever 135 engaging a sleeve 134 on a second lever 133 pivoted at 132 and having an arm 130 adapted to press back the lower end of the lever 115 in opposition to the spring 125. A spring-controlled stop member 141 pivoted at 142 engages an adjustable part 140 on the lower end of the lever 115 to hold the gears 113, 114 in engagement when the treadle 139 has been released. Upward movement of the stop member 141 is limited by an ear 145 formed on the lower end of the lever 115. The stop lever also carries a cam member 144 adapted to bear against the periphery of the crank disc 110 which is formed with a pair of diametrically opposite cam projections 111, 112 whereby the stop member is depressed and thrown out of engagement with the part 140 after each half revolution of the crank discs, thereby releasing the spring 125 which rocks the lever 115 to disengage the gears 113, 114 whereupon the crank discs cease to rotate and the hide-supporting roll remains in or out of action until the treadle 139 is again depressed. The roll is supported in the inoperative position by adjustable stop members 150 carried by the uprights 10, 11.