Patent GB-322411-A (GB)
Title: Improvements in pulling-over machines
IPC: A43D23/02
Filed: 1929-03-12
Abstract: 322,411. Stephens, A. J., (Nollesche Werke Kommandit Ges.). March 12, 1929. Pulling-over.-Relates to machines of the kind described in Specifications 170,352 and 239,890, wherein the pincers are operated by a treadle for grasping and stretching the upper and the remainder of the operations are performed by power, and consists in the provision of mechanism whereby the same treadle operates a sole presser to press the last into the upper, whereafter the sole presser is actuated by the power drive to lift the finished shoe and is then returned to initial position. The sole support 72, Fig. 4, is adjustably carried by a lever 73 pivoted at 74 to a lever 75 linked to a lever 58 provided with an arm carrying a cam plate 64 co-operating with a roll 67 on the treadle 65 for giving the side pincers their closing and stretching movements. Another arm of the lever 58 carries a roll engaging a cam 62. The levers 73, 75 have adjusting stop screws 78, 81, respectively, the screw 78 determining the normal relative position of the two levers, and the screw 81 determining their position relatively to the machine frame and pincers. The pincers are urged upwardly by a spring 20, Fig. 1, and closed and drawn downwards by a rod 10 connected to a knee-lever 13 pivoted on a slide and connected to a lever 16 operated as described in the prior Specifications. The pincers move with a lever 50 provided with a cam surface 50<1> co-operating with a complementary surface 4<1>, a roller 53 being spring-pressed upwardly to jam between these surfaces. When the pincers are in their outward positions, the roller is prevented rising by a finger 56 depressed by a fixed cam surface 57, but as the pincers move inwardly, for the overdraw, the finger leaves the cam surface 57 and allows the roller 53 to maintain the pincers in the stretching position against the pull of the overdraw. At the conclusion of the cycle, as the pincers return outwardly to starting position, the finger 56 is again engaged by the surface 57 to allow the pincers to rise to starting position. A screw stop 42 engages a slide carrying a nail guide 48 to align the nail supply tube. 41 with the driver tube, 43 in the outer position of the pincers. Both the pincers and tacking mechanisms are self-adjusting to the side of the upper or last which they engage. They are returned to central position on their outward movement. For this purpose, the tackers carry a wedge 44, Fig. 5, which centres itself between the. fixed side plates 1, 2, and the pincers carry a pin 45, Fig. 6, which is similarly centred by the notch 46. In operation, the toe pincer is first closed on the upper and moved downwardly, as described in the prior Specifications. On the descent of the side pincers, the roll 67 causes elevation of the sole presser. These two treadles may be actuated more than once, if desired. On the power drive being clutched, over-draw and tacking are completed, and the pawls 70 released as described in the prior Specification. Finally, a nose 62<1> on the cam 62 elevates the sole prosper to raice the finished shoe for ready removal by the operator.