Patent GB-478649-A (GB)
Title: Improvements in or relating to lasting machines
IPC: A43D21/12
Filed: 1936-07-21
Abstract: 478,649. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. July 21, 1936, No. 20155. Convention date, July 31, 1935. Addition to 436,539. [Class 17 (i)] Bed - lasting.-A machine organized for use in carrying out the method of lasting described in the parent Specification is provided with toeend wipers and with side wipers, for lasting the margin of the upper between the toe portion and the shank, which partake of the adjusting and operative movements of the toe-end wipers and also are capable of independent wiping motion for lasting the said marginal portions of the upper. In a bed-lasting machine of the general character described in Specification 22630 /08, [Class 17 (i)], having heelend and toe-end wipers 7, 40, side wipers 66 are supported on extensions 64 of the toe wiper carriers 39. Usual means are provided for adjusting the toe wipers heightwise, lengthwise, and angularly with respect to a shoe supported in the machine, and such adjustments are imparted to the extensions 64 and so to the wipers 66. The toe wipers receive their wiping stroke from a hand lever 56 and a similar movement lengthwise and inwards of the shoe is imparted to the side wipers, but such movement is insufficient to close the side wipers upon the upper. Each side wiper, Fig. 6, has a flange 67 engaging a flange 68 on the toe wiper whereby it is guided in its closing movement, and has a part of its wiping edge formed by a flexible plate 70 which can be flexed by a screw 74 to adapt it to any particular heightwise curvature along the bottom of a shoe. Each side wiper is carried by a resilient arm 80 secured to a slide 84 guided in the extension 64 and provided with a rack 100. The latter meshes with a pinion adapted to be rotated through bevel-gearing, not shown, a telescopic and universally-jointed shaft 116, a rack 126, and a hand-lever 134. The two racks 126 are biassed by springs 138 to hold the side wipers normally in outermost position, and the levers 134 are arranged adjacent to the lever 56 and are both moved in the same direction to effect closing movement of the respective side wipers inwards and somewhat toewards of the shoe. In a method of lasting with this machine, a shoe which has been pulled-over at its toe end and lasted at the shank and heel end, is positioned in the machine and the toe wipers are operated to last the toe end of the upper. The toe wipers may then be withdrawn, the upper materials trimmed and treated with cement, and the toe wipers again advanced to wipe the margin of the upper into position to adhere to the insole. The upper margin in rear of the toe portion is then treated with cement, and each side wiper in turn is moved in by its lever 134 to wipe said margin over the insole. Preferably, hand pincers 142, Fig. 7, having a member 144 forpressing down the margin of the insole. are used for pulling the upper heightwise and inwards of the last, at successive locations, while the side wiper is pressing against the upper near the edge of the insole. Finally, a further advance is imparted to the toe and side wipers by manipulation of the lever 56. Specification 294,640, [Class 17 (i)], also' is referred to.