Patent GB-191500451-A (GB)
Title: Improvements in or relating to Assembling and Lasting Machines for use in the Manufacture of Boots and Shoes.
IPC: A43D21/00
Filed: 1915-01-11
Abstract: 451. British United Shoe Machinery Co., [United Shoe Machinery Co.]. Jan. 11. Assembling p a r t s ; pounding-up and like. -Relates to assembling and heel - seat lasting machines of the type described in Specification 26,698/09, and consists in the provision of a machine in which the upper is strained forwardly on the last by grippers extending substantially the whole width of the upper approximately at the tip line, the shoe being so mounted that, after the upper has been gripped at the toe and clamped at the heel, the worksupport can be moved to present the shoe rigidly to a pounding- up roll adapted to conform the heel seat to the last by a beating action, and then, resiliently, to a fastenerinserting means. The last, with the parts of the shoe to be assembled, is supported on a screw pin mounted in a bar 15, Figs. 1 and 2, forming part of the jack, which is adjustably supported on a ballended spindle 4 resting on a spring 5 in the base of the machine. The spindle 4 is adapted to be moved into recesses 7, 8, 9 in a triangular frame 6 bolted to the standard 2, its normal position being a forwardly-tipped one into the recess 7. The bar 15 has a forwardlyextending forked bar 20, between the sides of which slides a pincer comprising a movable inner jaw 24, which forms a toe rest for the last, and a fixed outer jaw 25, which constitutes a tip-positioning gauge. These jaws are adapted to be closed by a chain and spring connexion 35, 36 with a hand-lever 40, and are held closed by a pawl and ratchet 42, 43. Further movement of the hand-lever causes the pincer to strain the upper forwards about the last. The jaws 24, 25 may be released by means of the pawl 42, or automatically by a tripper 44 when the pincer is allowed to slide down the arm 20. At the rear side of the jack bar 15 is pivoted a lever 16, the head of which is formed with a lug pivotally supporting curved arms 55, which carry devices comprising forming-tools 60 and a clamp 62 for conforming the upper materials to the side faces of the last. The tools 60 are a number of spring-pressed rolls loosely mounted on axle rods 64, Fig. 5, in the ends of the arms 55; in some cases, they are enclosed in a cover apron 68, Fig. 6. The clamp 62 consists of a steel band with a cushion lining, and is carried by swinging-bars 70 projecting from the arms 55, which are pressed towards each other by spring plungers 69. The lever 16 is moved forwards by a hand-lever 50 until the rolls 60 engage the work, whereupon the lever is vibrated to cause the rolls to rub the work and to advance gradually towards the shank. As they do so, the clamp 62 is gradually tightened about the heel at its edge, until, finally, further advance of the lever 16 reacts through the bars 70 and separates the arms 55, so that the rolls are moved out of contact with the work. In this movement, the spring plungers 69 are pressed back, and a locking-bar 75 drops down in front of their heads; a releasing-rod 78 operated from a thumb-piece 79 is provided for the bar 75, and a locking-pawl 54 for the lever 50. The jack as a whole is then moved so that the spindle 4 rests in the recess 8 in the frame 6, where it is preferably held rigid by a wedge surface 81. This brings the shoe beneath a pounding-up roll 80 constructed as described in Specification 12,761/05 and mounted in the forked end of a rod 85 movable in a bracket 86. The bracket can be lowered yieldingly by a treadle 90 to cause the roll 80 which is constantly driven from a belt pulley 96 loosely mounted on the nower shaft. to act with the desired pressure on the work. while the roll can be moved longitudinally, and also tipped slightly, by means of a hand-lever 100. The action of the roll draws the upper over the heel seat from opposite sides of the shoe simultaneously, and beats the upper down on to the heel seat progressively from the back to the breast of the heel. When this has been accomplished, the jack is moved so that the spindle 4 rests in the recess 9 of the frame 6, which brings the shoe beneath the nozzle 130 of a tacker of ordinary construction. The tacks may be driven continuously as the operator moves the heel seat round under the nozzle 130; but preferably the machine stops after each tack is driven, and is started again by the side pressure of the shoe, or the clamp 62, against a clutchcontrolling device 115. The nozzle 130 projects through a forked plate 132, which acts as a wiper as well as a presser-foot.