Patent GB-549577-A (GB)
Title: Improvements in or relating to the lasting of moccasins
IPC: A43D113/00
Filed: 1941-05-21
Abstract: 549,577. Lasting moccasins. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). May 21, 1941. No. 6499. Addition to 491,871. [Class 17 (i)] Modifications are made in the method of and apparatus for lasting moccasins described in the parent Specification. The moccasin bottom is provided with locating means adapted to register with a locating mark on a forepart shaping form, the method comprising tacking the bottom on said form and then attaching the forepart form with the bottom mounted thereon to successive complemental heel part forms secured in different devices intended for use in shaping the moccasin bottom to the shape of the forepart form. The locating means may comprise a mark 240 on the side of the forepart form and an ear E integral with a collar C on the moccasin bottom. Preferably, the heel portion is first completely finished. A dovetailed tongue 22 of the forepart form is inserted in a complementary slot formed in the heel part 10, the slot being formed in a plate pivoted at 18 to the remainder of the heel part, toggle links 28, 30 normally straightened by a spring 34 maintaining the form in extended condition. When the toggle is straight a spike 58 passing through a slot in the form holds the upper thereon. The toggle is broken by a hook 46 actuated by a treadle and co-operating with a plunger 40 connected to the knee of the toggle. The tongue 22 is retained in operative position by a latch 54 slidable in the link 28 and withdrawn on the breaking of the toggle. The form is rotatable about the axis of the plunger 40 and also swingable about an axis 80. When it is swung upwards about this axis it may be locked by the treadle, a wedge portion carried thereby co-operating with the ends of arms 86. The form may then be swung to rest on its two sides in turn to enable tacks 242 to be driven into insertions secured in the form. The upper is then steamed or otherwise tempered and the forepart form and work assembled with a heel part mounted in a machine similar to that described in Specification 528,512, the heel portion having a slot complementary to the tongue 22. The heel portion houses toggle mechanism similar to that in the part 10, but the toggle control link 146 is automatically actuated, it being pivoted between ears spaced from the pivot 126 of the form, the arrangement being that the toggle is broken when the form is moved from operative to work-changing position. The ends of the lasting cable 164 are secured to arms 166 urged together by a spring and separated by right-and-left hand screws connected to the lengthadjusting screw 108, the arrangement being that as the apparatus is adjusted for length of work by a hand-wheel 110 the arms are swung to make the corresponding width adjustment. A chain 234 connected to a treadle enables the wedge210 and abutment 208 for the forepart clamp 207 described in the prior Specification to be swung to one side for work-changing. The lasting cable has a spring sleeve cover of spirally wound wire normally just free to turn on the cable to allow of some roll during the lasting operation. As the tension increases the rolling decreases and finally ceases and the action becomes gripping and wiping to stretch the upper over the form.