Patent GB-664645-A (GB)
Title: Improvements in or relating to machines adapted for operating on shoe soles
IPC: A43D43/06
Filed: 1949-06-18
Abstract: 664,645. Applying ribs to insoles. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). June 19, 1950 [June 18, 1949], No. 16256/49. Addition to 651,635. Class 17 (i). The machine for applying ribs to insoles of the parent Specification is modified in that the feed foot and presser foot are combined and the feed foot is further provided with a spring pressed dog to prevent any drawing through of the strip as the insole is withdrawn from the machine. A slitting knife is provided to slit the outer flange of the strip at the points of greatest curvature to prevent distortion of the insole. The combined feed and presser foot is attached to a lever 254, Fig. 9A, which has imparted to it a four-motion feeding movement by a system of toggles as in the parent Specification and comprises a body part 260, notched at 267 to accommodate the nib R, to which feed pawls 264, 265, Fig. 9, are pivoted to engage the outer and inner flanges F, F' of a strip E supported on a ledge 268, Fig. 9A. A slide 278 in a slideway 276 in the body 260 has two unequal legs 283, 285, the shorter 283 being notched at 286 to form a tooth 288 to engage the inner flange F' while the longer leg 285 normally engages the insole under the action of a spring 280 which however is overcome by the spring of the work table 190 so that the short leg 283 is held out of contact with the flange until the table is depressed to remove the insole; the tooth or dog 288 then engages the strip to prevent its withdrawal out of the feed foot. A presser plate 300 notched to accommodate the rib R and having toothed surfaces 304, Fig. 9, to engage the strip flanges is secured to the body 260 and moving with it presses the strip S on to the insole and feeds the strip and insole. A slitting knife 420, Fig. 10, is mounted on levers 448, 450 pivoted at 446 to an arm 444 attached to another arm 434 which is caused to oscillate about a shaft 436 by connection to a rod 432 of the toggle lever system used in the parent Specification to operate the tucking foot. A stop 482 urged by a spring 488 against a plate 486 locates the knife accurately relative to the rib R. The insole edge gauge 234 has a projection 478 engaging a roll 476 on an arm 474 which is connected by an upper arm 472 and link 470 to the arm 450 of the lever carrying the knife 420 so that as the edge gauge is moved away from the insole as it is when operating on the shanks the knife is moved to an inoperative position shown in chain lines, Fig. 10. The cut of the knife can be varied by adjustments to the toggle system. A fixed but adjustable stop 502 holds the insole and outer face of the rib R as the work table 190 is raised by its spring as the feed foot rises and by adjustment relative to a severing knife it is ensured that only the strip is cut on operation of the knife. The severing knife and feed foot are operated from a common shaft, the mechanisms being engaged by clutches which are arranged to be mutually exclusive as in the parent Specification. A modified clutch arrangement is also described having in conjunction with it a counter mechanism.