Patent GB-463526-A (GB)
Title: Improvements relating to sole pressing machines
IPC: A43D25/06
Filed: 1936-08-12
Abstract: 463,526. Boot - making machines. COMPO SHOE MACHINERY CORPORATION. Aug. 12, 1936, No. 22219. Convention date, Aug. 14, 1935. [Class 17 (i)] Sole - Laying &c.-Relates to sole - pressing machines of the kind described in Specification 379,884, wherein a plurality of sole - presses, each having an inflatable pad, are movable along a predetermined path, and consists in improved means for inflating the presses when work has been changed. An inflating device is mounted near said path and moves with the press along a portion of the path, being coupled in inflating relation with the press at the commencement of such movement and, thereafter, uncoupled from the press and returned to original position. Similarly, the deflation of the press before reaching the work - changing position, is also effected while the press is in motion, a valve plunger being depressed and maintained depressed by a latch on the press, which latch is tripped to release the plunger before the work is changed. The deflating mechanism may be similar to that described in Specification 459,818. At the work-changing station a treadle is connected to a lever 33 normally in line with a head 44 slidable on a tube 38 forming part of a high pressure air supply conduit and supported for axial movement in a carriage 35 slidable on guide rails 36, 37. The end 39 of the tube houses a valve having a projecting plunger adapted to co-operate with the outstanding plunger of the valve 17 of each press, the arrangement being that when the treadle is depressed the two plungers engage and the press is inflated. The 'head 44 is urged outwardly by a spring 45 and is provided with a pin 52 co-operating with a latch 56 on the carriage. A lug 53 on each press co-operates with a lever 54 on the carriage to first align the valve plungers and then move the carriagewith the press when this moves forward after work-changing. The treadle actuates an electric switch to re-start the presses in motion after work-changing and after the pin 52 has engaged its latch. As the press nears its next stopping position a projection on the carriage opens a second switch to open the circuit of the motor moving the presses, and a cam 66 tilts the lever 54 to allow the carriage to return under the pull of a weight. The tail of the lever 54 frees the latch 56. Before reaching the operator's station the plunger of the valve carried by the press may be engaged by a bar 169 to deflate the press. The bar is carried by a plunger 170 actuated through a spring 101 by an arm 97 on a shaft actuated by the treadle. A latch 76 is urged by a spring to prevent the plunger advancing when the bar 169 is retracted, a cam 80 repositioning the latch after time has allowed deflation. In a modification, the deflating bar 69 may be actuated by a solenoid 72 connected across the terminals of the motor, so that the bar is retracted when the presses are in motion and actuated by a spring 71 as the presses come to rest. The electric circuit is as described in Specification 459,818. The press used is substantially as described in Specification 394,390.