Patent GB-628218-A (GB)
Title: Improvements in or relating to heel breasting machines for use in the manufacture of shoes
IPC: A43D87/00
Filed: 1947-09-23
Abstract: 628,218. Heel breasting. BRITISH UNITED SHOE MACHINERY CO., Ltd., PRATT, J. W., and ELLIOTT, H. E. Sept. 23, 1947, Nos. 25781/47 and 19598/48. [Class 17 (i)] A heel is supported top lift downwards on an adjustable carrier between gauges for correctly positioning the heel in relation to a reciprocating breasting knife ; an air blast is provided to eject waste on or just before completion of the retraction of the knife. The breasting knife 17, Fig. 1, is supported in a vertically movable slide 3 located on the top of the frame 1 of the machine. The heel supporting carrier 11 is mounted on the top of an adjustable post 7 supported by a sleeve member 5 and can be tilted in a horizontal plane on a slide 13 and clamped in position by a screw 15. A pair of gauge plates or stops 19, 21, Figs. 1, 5, are supported in a guideway 23 and are adjustable forwardly and rearwardly of the machine (widthwise of the heel) by a screwed rod 24 to engage the side of the heel H while remaining equidistant from the midline of the carrier. A gauging device to position the heel angularly relative to the knife and widthwise of the carrier consists of two gaugerods 27,29, Fig.5, which engage the heel breast-face near its side edges and are adjustably mounted on L-shaped levers 33, 35, Fig. 1. A screw 57 adjusts the position towards or away from the knife 17 and by loosening the wing nut 77 the plates 33, 35 can slide on their supporting rod 37 to adjust the distance between the rods 27, 29. The device is supported below and to the right of the carrier on pivoted links 51, 53 and is held with the rods 27, 29 pressing down on the carrier by a spring 55. A lever 81 is attached at one end to a bell crank extension to the link 53 and at the other end to a lever 85 which is pivoted on a cross-rod 89 held in a block 91. The rod 81 is pulled to the right by a spring 87 and, through the link 53, tends to hold down the rods 27, 29. A lever 93, also pivoted on the rod 89, has a latch at the end which is engaged by a latch 97 on a lever 95 of a toggle mechanism the other lever 99 of which is pivoted with a lever 101 to the frame. A spring 105 tends to hold the lever 95 up. The cutter slide 3 is attached by a rod 102 to the right-hand end of the lever 101 and the other end engages a piston rod 103. When the cutting slide is in its uppermost inoperative position, the toggle mechanism is bent so that the latch 97 is disengaged from the lever 93 and the piston rod 103 extends partly into the cylinder 83 in which a piston is held in its uppermost position by a spring. When the cutting slide moves downwards, the toggle straightens moving the latch 97 to the left and the piston rod rises and engages with the piston. On the return stroke, the latch 97 engages the arm 93 pulling it to the right and the rods 85, 81 to the left, which, in turn, raises the rods 27, 29 vertically clear of the carrier, through the link 53, and the piston rod 103 pulls down the piston. Near the top of the return stroke the piston is tripped by a cam and ejects a blast of air through the nozzle 109 located to the left of the carrier, Fig. 1, to clear away waste, while the rods 27, 29 are held clear from it. As the piston returns to the top of the cylinder, a push rod 121 is pushed upwards and, through the pin 119 and lever 113, pushes down the rod 111, to disengage the latch 97 and free the lever 93 so that the gauge rods 27, 29 are again depressed under the influence of the springs 87, 55. The cutting stroke is started by a treadle and the final cutting pressure is provided by power. In a modified form, Figs. 9, 11, the gauges 19, 21 are replaced by thin plates 151, 153, and the gauge rods 27, 29 by rods 163, 165. These plates and rods are joined to supporting members 155, 157 which are mounted in clamp members 159 to the plates 331, 35<SP>1</SP>, so that widthwise and lengthwise adjustments occur together. The air nozzle is modified and consists of a rectangular bar 171 pivoted at 173 in a groove in the face of the carrier. A spring 175 urges the end which is located under the heel upwards. The nozzle end is depressed in to the groove by the heel until the gauging device is raised, when, in timed relationship, the air blast ejects any waste material. In the first Provisional Specification the heel-breast engaging gauge rods may be secured by set screws in levers joined together by a threaded rod passing through bosses which allows the gauges to be adjusted widthwise. The bosses are located to the right and below the carrier.