Patent GB-321954-A (GB)
Title: Improvements in or relating to marking or other machines for operating upon boot or shoe parts of flexible sheet material
IPC: A43D95/14
Filed: 1928-08-21
Abstract: 321,954. British United Shoe Machinery Co., Ltd., and Woodcock, R. B., (United Shoe Machinery Corporation). Aug. 21, 1928. Embossing-machines.-In machines for marking or otherwise operating on boot or shoe parts of flexible sheetmaterial by means of relative reciprocation between the work and the operating-tool, the parts are conveyed towards the operating position by a moving support on which the parts are held by adhesion in one connection, or by pressure applied thereto in a second construction. In the first construction, Fig. 2, applied to a marking- machine as described in Specification 185,839, the support consists of an endless band 55 rendered tacky with rubber solution so that the workpiece adheres thereto, and moved forward during the rising movement of the marking-head in order to carry the workpiece into operating position beneath the marking-head. The belt 55 passes around a roller 39 keyed to a spindle 41 mounted en extension brackets 27 of the main frame 1 and around a smaller roller 35 loosely mounted on a spindle 33 engaging slots in blocks 31 slidable in the brackets 27 and urged outwardly by springs 29. A link 49 operated from the main shaft of the machine actuates the shaft 41 to drive the band 55 through a ratchet disc 43 and pawl 47. A table 53, which rests on the spindle 33 and through which the spindle 41 passes, supports the upper run of the band 55. The workpieces are positioned on the band during its period of rest by means of a gauge 57, and are stripped off the band, after marking, by a blade 59. If it is desired to mark larger workpieces, the belt is removed bv withdrawing the shaft 41 axially and placing the pieces directly on the table 53. A catch 73 is provided to secure the spindle 33 and blocks 31 to the brackets 27 when the belt has been removed, and a guard 75 is fitted to protect the operator when the machine is so used. A machine employing an inked marking-head instead of a marking-strip may be used. In the second construction, Figs, 4, 6, and 7, the worktable of the machine comprises a fixed annular .part 103, with positioning gauges 109, a pressurereceiving bed 95 below the marking-head 85, and a discharge shoot 105, and a circular inner part 99 intermittently rotated to carry the workpieces to the various positions. The major portion of each workpiece rests on the part 103 but its edge is held between a gripper 113 and roughened spots 115 on the table 99. Each gripper consists of a bifurcated spring-steel strip secured to a member 117 pivoted to a block 121 adjustable radially in a slot 123 on the table. A spring 127 is interposed between the members 117, 121. In order to open the gripper 113 when it is opposite to the shoot 105, a cam 153 engages a roller 129 on the member 117 during the rotation of the table 99 and the workpiece is then discharged by centrifugal action. The cam 153 retains the gripper in the open position for sufficient time to allow of insertion of another workpiece against the gauges 109, whereupon the cam 153 is moved to allow the gripper 113 to grip the workpiece. For this purpose the cam 153 is guided by bolts 155, 157 in slots in a fixed plate 131, Fig. 4, and carries a roller 159 engaging a cam groove 161 fixed to a rotating shaft 137 driven by bevel gearing 139, 141 from the main shaft of the machine. In order to impart to the table 99 the required intermittent movement and to hold it positively against rotation during its periods of rest, the lower end of the shaft 135 of the table 99 has fixed thereto a horizontal plate 145 having four radial grooves 147 on its upper surface and a similar number of depending cam-rolls 149. A roller on an arm fixed to the shaft 137 engages the grooves 147 in turn to rotate the table 99 periodically, and a grooved cam-quadrant 151 on the shaft engages two of the rolls 149 to prevent rotation of the table 99 when the grooves 147 and coacting roller are not in engagement. The bed 95 is yieldingly supported by a spring 96 and has an arcuate seating on which it is held centrally by a spring 97 allowing it to rock to accommodate itself to different thicknesses of work. In order to prevent the marking-strip 161 from adhering to the workpiece after the marking-operation, a loop-shaped stripper 163 is moved horizontally across the face of the marking-head 85 by means of levers 169, 179 pivoted thereto, the former being oscillated from a cam 117 through an intermediate lever 175. The head 85 is reciprocated to and from the bed 95 by means of toggle levers 89 actuated by a link 91 connected to a camoperated lever 93.