Patent GB-388464-A (GB)
Title: Improvements in sole-affixing or like machines for the manufacture of footwear
IPC: A43D25/06
Filed: 1931-09-29
Abstract: 388,464. Boot-making machines. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Compo Shoe Machinery Corporation; 565, 5th Avenue, New York, U.S.A.) Sept. 29, 1931, No. 27144. [Class 17 (i).] Sole-laying.-A series of shoe-presses are connected to an endless flexible carrier and each press is automatically deflated prior to its arrival at a predetermined position, means being provided for inflating it at this position. The shoe clamping device is automatically released subsequent to the deflation of the press. The press is reinflated manually, by a movable chuck connected to an automatically operated valve. Each inflatable pad is covered by a conforming cushion secured under end flanges and free at its sides. A frame carries sprocket wheels at its ends over which passes a conveyer chain 17 to which a number of presses 15 are secured by lugs 59. Rolls 14 on the presses engage rails 13 of U-section carried by the frame. One of the sprocket wheels rotates with a disc 22 in which are formed notches 23 co-operating with the end 24 of a clutch bar pivoted at 26 and actuating a toothed clutch of which the driving surfaces are inclined at an angle of 30‹, the clutch driving a pinion connected by a chain to the adjacent sprocket wheel. The clutch bar is urged to inoperative position by a spring 31 and is linked to a handle 32, the arrangement being that on lifting the handle, the end 24 is released from the notch and the clutch engaged. The conveyer chain is then driven until the end 24 drops into the next notch, when the clutch is disengaged, the conveyer having brought a new press into work-changing position. Each press comprises a body 15 carried by rollers 14 engaging rails of U-section. An inflatable pad 39 is provided with outlet and inlet valves 44,43, the former operated by a plunger 46 and the latter connected to a nipple 45. The pad has a leather cover 42 secured at its ends but free at its sides. A clamping bridge 49 carries a last pin and fore-part pad, both adjustable for size of shoe, a pin on each co-operating with an inclined series of holes in the bridge. The bridge is pivoted to a post 47 also carrying a lever 50 co-operating with a fixed cam 72 on the machine. A bail 56 carries a pin 55 co-operating with notches at the free end of the bridge, the bail having a lug 58 for engagement with a fixed cam 71. At the operator's position, a treadle 63 is connected by links and levers to an air supply chuck in line with the nipple 45 of that press at the operator's position. The chuck moves with the plunger 66 of a valve 65 which engages a fixed cam 67 as the chuck moves forward, to open the valve. In operation, prior to a press reaching the operator's position, a fixed cam 70 engages the plunger 46 to deflate the pad. The cam 71 then trips the bail 56 and the cam 72 lifts the bridge. When the press arrives at the operator's position, the operator removes the shoe and positions a new one, clamping it by hand. To allow the bridge 49 to be depressed, the end 73 of the cam 72 is carried by a slide 74 urged to operative position by a spring. A plunger 461 is provided for deflation of the pad in case the new work has been improperly positioned. The bail and bridge of any empty presses are engaged by cams at the ends of the machine to prevent these members becoming entangled as the presses move along the lower run.