Patent GB-191420599-A (GB)
Title: Improvements in or relating to the Conforming of Boot and Shoe Uppers to Lasts.
IPC: A43D21/16
Filed: 1914-10-06
Granted: 1915-11-08
Abstract: 20,599. British United Shoe Machinery Co., [United Shoe Machinery Co.]. Oct. 6. Lasting.-A machine for lasting boots and shoes is provided with means for heating wiper means which extend substantially continuously round an end portion of a last, the wipers being preferably heated while in a retracted position. The sides of the upper may also be heated from the outside by means, such as a pad, arranged to embrace the upper about the sides of the last at an end thereof and preferably these means are employed in conjunction with the wiping means. The degree of heat employed may be sufficient to soften the upper, and may be modified, as by forming the wipers and pad of different heat-conducting materials. The degree of heat employed may, however, be sufficient actually to shrink and set the upper in lasted position upon the last bottom, and the invention includes a method of making shoes, and also an improved shoe, in which such a degree of heat is utilized for this purpose. The invention is described as embodied in the toe-lasting head of a bed-lasting machine, in which wiper plates c, Fig. 1, carrying removable wiper jaws c' are adapted to be moved through links e<2>, a sliding guide block e<3> mounted in a carrier f and a hand-lever e<4> to advance and close the jaws over the shoe bottom in the usual manner. The carrier f has secured to it an overlying plate or shield g, which is formed with a heating-chamber g<1> having inlet and outlet connexions for attachment to a source of live steam or other source of heat energy. This shield g serves as the means to heat the wiper, as above described, and also to heat the pad for working the upper up and along the sides of the last. This pad w, Figs. 1 and 2, is preferably made of leather, and is carried by a flexible chain m<1> secured to a support m<2> mounted to slide in a carrier m<3> and normally held retracted by a spring m<4>. The pad normally occupies the position shown in Fig. 1, but is adapted to be raised and closed about the shoe with a wiping action until it is level with the shoe bottom, whereupon the wipers are advanced to break the upstanding shoe margin down over the insole. Each free end of the pad is jointed to a spring- controlled bell-crank n pivoted on a slide bar n<2> mounted in a bracket n<3>, which is pivoted at n<4> to lugs on the pad carrier. The rear end of each slide bar is formed with a forked portion n<6> carrying a stud n<7>, which works in a slot n<8> in a bell-crank n<9>; these bell-cranks are pivotally connected to a link n<11> provided with a turn-buckle n<12>, and their forward ends are connected together by an equalizing-link n<14>, which permits the ends of the pad to close inwards to different extents. The elevation and depression movements, as well as the opening and closing movements of the pad are effected from a sliding-block adapted to be moved by a hand-lever o<10>. This block is formed with an inclined lower face o<2> adapted to engage a roll o<3> on a pad-lifting lever o<4>, and with inclined sides p adapted to engage rolls p<1> on lugs p<2> projecting from the brackets n<3>; it is also formed with a curved slot o<7> to receive the link n<11>, which rises with the block and ensures that the free ends of the pad m will be lifted proportionately to and with the elevation of the central portion of the pad.