Patent GB-328193-A (GB)
Title: Improvements in or relating to methods of and machines for shaping the toe portions of shoe uppers
IPC: A43D21/12
Filed: 1928-12-20
Abstract: 328,193. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Dec. 20, 1928. Lasting.-The toe portion of a shoe upper is moulded into complete conformity to the toe portion of a last by positioning the forepart of the last and the forepart of the upper relatively to each other and in determinate widthwise and longitudinal positions in a toe-shaping machine by the aid, respectively, of last-forepart and shoeupper positioning means in the machine and tensioning the upper on to the last as a whole as an incident of the moulding operation by pushing the last, positioned widthwise and longitudinally in the machine by interengagement (heightwise of the last) of surfaces on the work and the machine, heelward and upwardly into the upper held by the machine. The machine describedl in Specification 206,438 is modified for carrying out this method, in particular by the substitution of a jack for the shoe-carrying forms. At the front of the machine a short transverse shaft 21, Fig. 1, carries a hanger 22 to which are pivoted a plurality of substantially upright links 24 supporting a plate 25. A plate 27, Figs. 1 and 2, is adjustable forwardly and rearwardly and also angularly of the plate 25, the plate 25 having a curved guideway 31 to engage the head of a bolt 30 engaging a slot 28 in the plate 27, a second bolt 29 also engaging the slot 28 and screwing into the plate 25. The forward end of the plate 27 carries a depending web 32 provided with vertical guides for a plate carrying a jack arm 35 urged upwardly by a spring 38 to a limit determined by nuts 39. To the arm 35 is pivoted a lever 44 moving with a handle 47 provided with a locking pawl 48. A last pin 45 is pivoted to the upper end of the lever 44. The arm 35 also carries an adjustable heel rest 40. Forward of the last pin, a toe rest 78 is urged upwardly by a spring 79. A pivoted arm 60 carries at its forward end a presser plate or hold down 61, which, for welt shoe work, is shaped to the contour of the toe end portion of the insole rib to support this against the thrust of the wipers. A member 101, adjustable by a screw 103, serves as an abutment for the plate 61. Gauge members 80, Fig. 4, are provided, to abut against the sides of the last. These members are adjustable transversely of the last, being carried by slotted members clamped to the cover plates of the wipers. The gauges are pivoted so that they can yield upwardly. The work may come to the machine with the heel end portion shaped to conform to the last and secured to the insole which is itself tacked to the last bottom, e.g. after treatment in the machine described in Specification 206,437. A heated thermo-plastic stiffener is inserted between the upper and lining and jig holes near the ends of the tip seam engaged by a presenter of the kind described in Specification 206,176. The jig pins of the presenter are engaged in slots 84, Fig. 11, in the wiper plates, and pushed into offset portions 85 at the ends of these slots. The handle 47 is then depressed to force the heel portion of the last against the rest 40 and the toe portion down on the toe rest, the handle being then locked by its pawl. The treadle 19 is then depressed to start the machine. Clamping plates 93, Fig. 11, immediately descend to engage the edge of the upper and the sole presser 61 begins to descend. As it descends, a cam member 86, Fig. 1, adjustably secured to its operating shaft 75. engages a roll 89 carried by the plate 25, pressing the last heelwardly against the action of a spring 90. The rearward movement of the last and downward movement of its toe end wipes the upper forwardly and upwardly of the last by contact of the toe rest and the toe band 70. The jig pins having been freed from the upper by the plates 93, and the presenter withdrawn, and the presser 61 having seated snugly against the insole, rib, the wipers are advanced while the clamps 93 relax. The toe band 70 is retracted, and the presser 61 raised slightly, to allow the wipers to mould the upper and stiffener snugly against the insole rib. A trimming cutter 106, Fig. 11, then rotates to slit the upstanding upper materials at the toe end at the level of the top of the presser plate 61. The work is then left to set, while the other shoe is operated on in the other half of the twin machine. While the other shoe sets, the treadle 19 is depressed, the machine parts return to starting position, and the work may be removed. Specification 238,786 also is referred to.