Patent GB-131376-A (GB)
IPC: A43D23/02
Abstract: 131,376. British United Shoe Machinery Co., (United Shoe Machinery Corporation). May 29, 1918. Lasting and pulling-over.-Pulling-over or pulling-over and lasting machines having poweroperated mechanism for producing movement between upper-margin gripping means and a shoe bottom rest to strain the upper are provided with means movable between operative and inoperative positions for holding or replacing in position the margin of the sole. The invention is described as applied to a pulling-over and lasting machine, particularly for turnshoe work, which is of the same general construction as the machines described, for example, in Specifications 9793/08 and 920/15. A curved hold-down 64, Figs. 2 and 5, is secured to a spring-pressed arm 66 pivoted at 68 to a slide 70, which is guided for movement on the gripper-bar 6 and casing 4 of the toe gripper; a projection 78 on the usual sole rest 34 is adapted to enter a recess 76 in the arm 66 to determine the position of the hold-down lengthwise of the shoe. Each side gripper has associated with it a hold-down 80, which is pivoted at 82 on a slide 84 connected to a second slide 86; these slides extend respectively along the gripper casing 12 and gripperbar 14. The two slides 86 are connected to adjustable rods 94, Figs. 2 and 6, coupled to cranks 90, 92 on a shaft 88, while the slide 70 is connected by an adjustable rod 100 and a lost-motion device 104, 106 to an extension 98 of the crank 90. The shaft 88 is adapted to be actuated through a crank-arm 126 and link-and-gear mechanism 124, 122, 120, 118, 116, 110 from the usual spring-encircled red 30 which controls the updraw movement of the side grippers, a stud and slot connexion 112, 114 being provided to allow the grippers to be closed before the hold-downs begin to move; the lost-motion device 104, 106 further delays the movement of the hold-down 64 to prevent it from moving too far as compared with the hold-downs 80, and to enable the toe gripper to clear it as the gripper swings forward with its usual movement at the beginning of the updraw. The various parts are adjusted so that the holddowns reach the downward limit of their movement as the sole rest 34 completes its last-depressing movement, when the machine comes to rest. When the machine is restarted, the usual side clamps are actuated from a slide 62 so as to move the clamps into engagement with the shoe, and the side grippers then move inwards closely followed by the tacking devices to complete the pulling-over operation. Prior to the movement of the tacker arms the slide 62 engages a lever carrying an adjustable screw 152, which contacts with an arm projecting from a shaft 146. Rotation of this shaft causes a forked member 148 at its upper end to disengage a clutch member 134 from the crank-arm 126, whereupon an adjustable torsion spring 138 rotates the shaft 88 in a reverse direction to withdraw the hold-downs from engagement with the shoe; stops are provided to limit the upward movement of the hold-downs. To avoid excessive shock when the hold-downs are released, particularly if the machine is run with no shoe present, a spring-pressed buffer is arranged in a position to be engaged by the arm 92. Figs. 9 and 12 show a construction in which means are provided to determine the location of the toe end of the last on presentation to the machine, and to hold the margin of the sole down on the last bottom during updraw and until the wipers have advanced substantially to the edge of the shoe. These means comprise a last-positioning member 176 and a hold-down 182, both devices being curved to embrace the toe and both being mounted on a pivot 178 on the usual sole rest 180. The member 176 is formed on opposite sides with curved slots 204, the front portions of which extend upwards at an angle to the shoe bottom, and the hold-down 182 with straight slots 206 substantially parallel to the shoe bottom, both sets of slots being engaged by a pin 198 which extends on opposite sides of a rod 184 into cam slots 200 formed in upward projections 202 of the sole rest 180. The rod 184 is mounted for lengthwise movement against the action of a spring 196 in a pivoted block 186, which has secured to it a cam-plate 190 provided with cam-slots 193 engaged by rolls 194 on an end-wiper carrying an actuating arm 192. The arrangement is such that first the member 176 and afterwards the hold-down 182 are swung upwards and rearwards as the wipers advance, the member 176 wiping over the inner surface of the upper which is held by the toe gripper so that it tends to smooth out any wrinkles that there may be in the tensioned upper. Figs. 13 and 14 show a modified construction in which a pair of arms 210 are pivoted on the lower side of the usual sole rest carrier 208 and are normally spread apart by a spring 212 to engage the sole margin. The rear ends of the arms are arranged frictionally to engage a spring plate 214 secured to the machine frame, the friction being sufficient, on the depression of the carrier 208, to hold the arms 210 in the position into which they are moved by the wipers ; when the carrier 208 returns, the plate 214 frees the arms 210, which are then spread apart by the spring 212. Fig. 16 shows an arrangement in which the margin of the sole, if it has been lifted during updraw, may be replaced by a curved depending portion 222 of a plate 220, which is secured to a slide 216 movable on the rear of the front gripper-arm 218. The plate is normally upheld by a spring 224, but may be depressed by means of handles 226. Specifications 4236/07 and 100,902 also are referred to.