Patent GB-514211-A (GB)
Title: Improvements in or relating to machines for operating on shoe soles
IPC: A43D27/02
Filed: 1938-04-28
Abstract: 514,211. Sole rounding and channelling machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., BAGSHAW, C. M.. WILSON, V. E., and HALLAM, A. W. April 28, 1938, No. 12659. [Class 17 (i)] Relates to machines of the kind described in Specifications 200,540, 200,784. and 240,202, [all in Class 17 (i)], which are specially adapted for repairers, and particularly suitable for channelling a reoair sole and rounding the sole in conformity with the welt or the side of a shoe of the McKay type. The machine may be used for rounding without channelling. A work guide is provided presenting both a vertical shoe side or welt edge gauge and a horizontal flange for engaging below the welt or the feather. A work supporting table has an opening through which the channelling knife projects. A laterally moving foot cooperates with the channelling knife to feed the work and forms a cutting bed for the rounding knife. The work table 11 is secured to a vertical slide 9 urged upwardly by a spring 21 and pulled downwardly by a treadle for work positioning. A channelling knife 43 normally projects through a recess 41 in the table 11, and is clamped to the upper end of a lever 49 pivoted at 51 and oscillated by a cam on a driven shaft 5. The knife is adjusted forwardly and rearwardly by a flange 65 of a screw having a head 63. When channelling is not desired the pivot 51 may be lowered, to retract the knife within the recess, by loosening a clamping nut 73, which allows a block 53 carrying the pivot 51, to be lowered in a slot 69 in the slide 9. A rounding knife 75 has, in addition to its horizontal cutting edge extending widthwise of the machine, a short rearwardy extending cutting portion to assist in holding the sole stationary during the action of the channelling knife. The rounding knife is reciprocated by an eccentric on the cam-shaft. Above the channelling knife is a gauge member comprising a vertical surface 35 for engaging the edge of a welt or the side of a shoe, and a flange 37 to extend under a welt or the feather of a McKay shoe. For engaging the upper side of a welt ,a removable stop 135 is provided. The gauge is carried by a bar 29 adjustable forwardly or rearwardly after slackening a clamping screw 33. To the left of the flange 37 an upper sole-engaging foot 39 is secured to a lever pivoted at 91 to a corner 93 itself pivoted at 95. Cams on the shaft 5 oscillate the carrier and lever to cause the foot to descend to grip the work, to move laterally for the feed, rise to release the work, and return. A serrated foot 109 engages the under side of the sole, and is raised by a cam actuated lever to press the work against the foot 39 while the channelling knife performs its cut. For rounding cementattached soles the block carrying the channelling knife may be removed and replaced by a plain block level with the upper face of table 11 so as to assist in feeding the work. For this work a modified anvil and gauge comprises a freely rotatable roll 137 of general frusto-conical form with a groove at its base providing relatively sharp edges of equal diameter which increase the positioning effects of the roll. A wedge shaped block 155, held in position by a pair of dowel pins 157, may be inserted between the sole and the edge of the table to tilt the shoe to compensate for the convexity of the shoe bottom.