Patent GB-430758-A (GB)
Title: Improvements in or relating to heel seat fitting
IPC: A43D8/34
Filed: 1933-12-22
Abstract: 430,758. Boot - making machines. UNITED SHOE MACHINERY CORPORATION, Paterson, New Jersey, U.S.A.-(Assignees of Bessom, E. A. ; Marblehead, Massachusetts, U.S.A.) Dec. 22, 1933, No. 36082. Convention date, Dec. 24, 1932. [Class 17 (i)] Heel seats, shaping.-Relates to the type of machine having a trimming knife making a cut longitudinally of the sole to remove a horse-shoe shaped portion, a bulger having deformed the rear end of the sole by forcing its central portion through a U-shaped opening in a matrix plate, the machine having means for clamping the margin of the heel seat portion against the plate, and consists in detail improvements. Interchangeable parts allow the machine to be used for both Cuban and Louis heels, and, in the latter case, to form tongues of the kind having shoulders at the base tapering rearwardly at a slight angle to the plane of the sole. To prevent the bulging of the sole breaking the securing means between the sole and upper near the breast line, shouldering cutters, when these are used, are actuated before the sole is substantially deformed. These cutters are left in the cut to support the sole against the thrust of the trimming knife, and to form anvils against which the trimming knife cuts to sever completely the U-shaped trimming. Gauging means facilitate the accurate positioning of the work, and visible indicators are brought into alignment when the work is in correct longitudinal position. The marginal clamping means provide self-adjustment for varying thickness of sole. An ejector is provided for the trimming. A matrix plate, Fig. 14, may have cutting edges at the front so that any stitches in the rear of the breast line may be severed as the work is positioned. The front edge of the plate is curved, as shown, when Cuban heels are to be fitted, the corresponding plate for Louis heels having a straight edge. The plate is held by a spring pin engaging a hole 62, when it has been slid into place in grooves in a part 58, Fig. 7, of the frame of the machine. To facilitate accurate positioning of the work, a heel gauge 74, Fig. 4, has limited longitudinal sliding movement relatively to a member 78 which is adjustable according to the size of the heel to be fitted. The member 78 is adjustably secured to an abutment 92, Fig. 8, which may be brought up to the rear edge of the heel to be fitted by a roll 104, Fig. 4, carried by the slide 78 and engaging a cam 100, Fig. 2, rotated by a handle 96 moving over a scale. The breast of the heel abuts against a plate 90 which has a curved edge, for Cuban heels on one side, and a straight edge 110, Fig. 8, for Louis heels, at the other, the plate being swung through 180 degrees to change the edge and being held in desired position by a spring plunger. A bifurcated member 84, Fig. 4, centralizes the rear end of the shoe and is urged forwardly by a spring. To ensure that the rear of the shoe has pushed back the gauge 74, and that rearward movement of the shoe has not been prevented by an upstanding tack engaging the crease plate, an indicator 118, Fig. 8, secured to the slide 78 is positioned near an indicator 120 secured to the gauge 74, the indicators being in line when the gauge has been pressed back by the shoe. To assist in positioning the fore part of the shoe an arm 122, Fig. 2, has its free end in the vertical plane of the median line of the crease plate 36. The margin of the rear end of the sole is pressed against the crease plate by descent of sleeve 130, Fig. 4, the lower end of which is enlarged to provide guides 146, Fig. 7, into which slides a plate 172, Fig. 17, carrying a presser of U-shape, a spring plunger 188, Fig. 4, retaining the presser in operative position and also depressing its rear end the guides 146 being flared towards the rear. The presser, in one form, comprises a bight portion 176, Fig. 17, pivoted to lugs on the plate and urged away from the plate by springs, and leg portions 174 carried by the plate. This construction provides self-adjustment for varying thickness of sole, In a modification, the ends 174 are pivoted to the plate, and urged away from the plate at their forward ends by springs. In another modification, the presser is of rubber, with a metal lining on the inside. The sleeve 130 is bored to receive a rod 134, Fig. 4, carrying the bulger 46 at its lower end. The rod is screw-threaded at its upper end to carry an adjusting nut 154 engaging a cap 152 over a spring 150 abutting against the top of the sleeve 130. The bulger slips on to a reduced lower end of the rod, and is retained by a spring plunger. The rod and sleeve are prevented from turning. The shouldering knives 196, Fig. 10, for Cuban heels are curved and engage pins 198 secured to blocks 200 adjustable towards and from each other in an arcuate guide way by a screw 206, and clamped after adjustment by a screw 212. The knife carrier 204 is vertically adjustable, clamping screws 220 passing through slots in the carrier and screwing into a block 214, this block being screwed to an arm 228. A thrust pin 224 assists in maintaining the adjustment. The arm 228, Fig. 2, moves with a slide 218 moving in a guideway pivoted at its lower end on an eccentric pin 234 and bored to receive a screw 236 engaging one of a number of holes 238. This construction allows of adjustment of the angle of the shoulders cut by the knives 196 and also enables the path of the cutters to be brought into line with the edge of the crease plate. The rod 134 is raised and lowered by levers 246, 250 and a treadle lever 254, a spring 256 allowing yield. The rod 254 is connected to an arm 258, Fig. 3, on a shaft 260, the arm being linked to a treadle 264, lost motion being allowed by a slot 289, a spring 285 normally maintaining a pin 284 at the top of the slot. A second link 266 actuates a bell-crank lever 268 resiliently connected to a stop 274 cooperating with an arm on the rod 260. The pin 284 actuates a one-revolution clutch driving a cam-shaft 290 actuating links 300, 312 connected to the slide 218 and the trimming knife, respectively. The arrangement is that as the treadle 264 is depressed the rod 134 is depressed to cause the presser member to clamp the sole margin and the bulger to engage the central part of the sole. As the treadle is depressed further, the lever 268 swings the stop 274 under the arm on the shaft 260. When the pin 284 trips the onerevolution clutch, the shoulder-forming knives are actuated, and then the stop 274 is depressed to give a power thrust to the rod 134. The bulger and presser member descend until the cap 152 contacts with the bearing 132 carried by the frame of the machine. The link 312 is then depressed by the cam to actuate a slide 302, Fig. 2, having a transverse lug in which is adjustable a carrier 318, Fig. 15, for the trimming knife 48. The knife is longitudinally adjustable by a screw 324 having threaded engagement with a block provided with a tongue engaging a slot 330 in the knife. A clamping screw 326 is provided. The chip out off by the knife is removed by an ejector 344, Fig. 2, actuated by the rise and fall of the rod 134. The ejector is pivoted to the fixed bearing 132 and has an arm 348, normally resting against a stop, and an arm 356 co-operating with a spring-pressed arm 352 pivoted to the lower part of the member 130. The arm 352 slips over the arm 356 as the arm 352 descends, and actuates the ejector as it rises. Three interchangeable crease plates, each with its presser member and bulger, may be provided for Cuban heels. For Louis heels the shoulderforming and trimming knives, also, are changed. In a modification, the shouldering knives move laterally of the sole. A vertical rack-bar gearing with a pinion carrying cams 412, Fig. 23, is carried by the slide 218, and spring pressed upwardly relatively to a knife carrier slotted to clear bolts 382 securing the rack to the slide. Each cam engages a roll at the end of a lever 414, universally jointed at its lower end to a slide block 422 carrying a knife 378. The knife carrier has an upstanding rod 398 headed to engage an overhanging arm from the guideway of the slide 218. The knives are adjustable along arcuate slots 438 to vary the angle of the cut to the plane of the sole, and the paths of the slide blocks are adjustable by mechanism similar to that described for the knives 196, to vary the angle of the cut to the median line of the sole. When the slide 218 begins its downward movement, the whole assembly drops with it until the head of the bolt 398 contacts with the top of the arm 392. Further descent of the slide causes the cams to actuate the knives, which move toward each other to make the shouldering cut and then remain in the sole to support this and act as anvils for the trimming knife. If it is desired that the shoulders at the base of the tongue should taper rearwardly at a slight angle to the sole, a short matrix plate 454, Fig. 27, may be used and a sole distorting plate 456 substituted for the knives 42 and their carrier, the bulger and presser being correspondingly modified. The trimming knife 48 will then make the complete out.