Patent GB-191207023-A (GB)
Title: Improvements in or relating to Machines for use in the Manufacture of Welted Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D43/00
Filed: 1912-03-21
Granted: 1913-03-20
Abstract: 7023. Boult, A. J., [United Shoe Machinery Co.]. March 21. Sole - levelling etc.; welts and welting, machines for.-Figs. 1 and 2 illustrate a welt-butting machine in which the ends of the welt are severed by rotary disk cutters. The shoe, as it leaves the inseam trimmer, is presented to the machine so that the first stitch engages a gauging-edge 17, Fig. 2, of a welt-supporting plate 16 secured to the forward end of a member 8 of a shoe support; the opposite side of the shoe is similarly positioned over a second plate 15 carried by another shoe-supporting member 9. The two members 8, 9, Fig. 2, which are geared together for simultaneous movement and connected at their rear ends by a spring 12, are pivotally supported by a bedplate 5 secured to a vertically-adjustable post 4. The welt-supporting plates 15, 16 are slightly inclined to the horizontal awav from the centre of the machine, and their forward ends 21, 20 are inclined downwards and towards the front of the machine. When positioned, the two ends of the welt are simultaneously bevelled off by adjustable rotary-disk cutters 38, each of which is mounted in a bracket 35 loosely journaled on a shaft 27 supported in an inclined bracket 22 bolted to the main standard 1. The cutter shaft is geared to the shaft 27, which is driven by bevel-gearing 28, 29 from the main shaft 30, while sector gearing, controlled against the action of a spring 47 from a treadle 50, is provided for oscillating the bracket 35 about the shaft 27 while the cutter is rotating. The effect of this is that, in the operation of the machine, the cutter makes a sort of draw cut as it passes through the work, bevelling the end of the welt in the direction of the heel seat and also towards the outer edge of the welt. Each end of the welt is held down upon its supporting-plate by a rotary presser-wheel 51 of frustoconical form, which is mounted on a spring- pressed lever 52 fulcrumed on the bracket 35. Figs. 7, 8, and 13 illustrate a modified construction of machine, in which each of the rotary disk cutters K is secured to a shaft journaled in a sleeve 127 carried by an arm 126, which projects from the upper end of an inclined rockshaft 125. The cutter is constantly rotated by a rope drive R, and is moved inwards to butt the welt by the engagement with a crank arm at the lower end of the shaft 125 of a tappet cam 134 on a sleeve 119 loosely mounted on, and driven by gearing in the opposite direction to, a main shaft S; the rope drive includes a tensioning-device which, as the cutter is moved inwards, tightens the belt, and on the release of the shaft 125, returns the cutter to its original position. The welt-presser 131, which lies in advance of, but moves with, the cutter, is adjustably carried by a vertically - movable lever 130 secured to an arm 129 located above the arm 126. It is provided on its welt-engaging surface with a transverse shoulder 149, Fig. 8, which is adapted to press the welt into a shoulder 148 formed on a welt - supporting plate carried by each of the geared spring- pressed arms 142, Fig. 7, of the work-support; this shoulder is located at the junction of a part 146 of the plate which is adapted to extend over the heel seat at the rear of the inseam and beneath the free end of the welt, and a part 147 which extends at a slight angle to the part 146, and is adapted to enter the welt crease and to bear against the inseam. The co-operation of the two shoulders 149, 148 turn up the free end of the welt, and allows the cutter K to make a clean cut through its grain side, as shown in Fig. 13. The work-support W, Fig. 7, is adjustably carried by a slide 122, which is adapted to be raised by a lever 120 actuated by a cam 112 on the sleeve 119. When the worksupport is raised, the welt ends are brought vertically against the pressers 131, and all tendency to force these inwards is avoided; after the butting-operation, the work-support drops back again by gravity into shoe-receiving position. The machine is fitted with emery grinding-wheels 152, which are adapted to be tipped, when required, into contact with the cutters.