Patent GB-239597-A (GB)
Title: Improvements in and relating to sole trimming or trimming and channelling machines
IPC: A43D43/02
Filed: 1924-06-11
Abstract: 239,597. Gimson Shoe Machinery Co., Ltd., and Denne, M. T. June 11, 1924. Trimming ,and channelling. - In a sole edge trimming or trimming and channelling machine adapted for the production of an " extension edge '' the fore-part guide has imparted to it, at the desired time, a continuous instead of intermittent movement. Means are also provided for readily controlling the position of the channelling cut. The main driving shaft 4, Fig. 3, of the machine carries a cam drum 7. A crease guide 17 embraces a cutting abutment 15 which is reciprocated in time with, and to allow the work feeding movements by a cam groove 8. The stem of the abutment 15 is carried in a frame 13 which is rocked, to feed the work, by a cam groove 10 and a lever 24 fixed to the stem 12 of the frame 13. The trimming knife 28 with the usual support 29 is reciprocated by a cam groove 9. A channel-knife holder 34 is vertically slidable in a horizontally slidable member 32 normally held towards the work by long springs 36. The member 32 may be moved, to permit insertion of the work, by means of linkage 39, 40, 41 and a treadle-rod 42. The knifeholder 34 may be moved downwardly in order to vary the distance of the channelling cut from the sole edge, by a link 43 and bell-crank lever 44. The movement of the lever 44 is effected by a sliding member 46 when a block 51 is moved along an inclined guideway 50 owing to a lever 48 being rocked by a treadle rod 53. The pivot 49 of the lever 48 is adjustable to vary the initial setting of the channelling knife, and the guideway 50 is adjustable to vary the subsequent range of movement of the knife. The fore-part guide 56 is a curved metal blade adjustable by a rack and pinion in a rocking carrier 57 and normally held in raised position by a spring 66. The guide is lowered to engage the work by the treadle rod 53 acting through a bell-crank lever 67, push-rod 68, roll 70, and cam surface 71. The carrier 57 has a roll 64 engaging a cam or profile strip 61 the contour of which determines the extent to which the guide can be lowered by pressure of the roll 70, and consequently determines also the shape of the extension edge." A number of different profile strips is provided with each machine. The strip 61 is mounted .on a transversely slidable carriage 62, which is moved in one direction or the other according as a left or right shoe is to be operated upon. The carriage 62 is driven by a rack and pinion from a continuously-rotating shaft 87 which drives two gears 78, 79, Fig. 12, either of which may be clutched to a worm 77 which drives the carriage. The clutching mechanism comprises crown wheels 85, 86 on sleeves 83, 84 having clutch members 92, 91, and clutch members 94 on a shaft 93 splined to the worm 77. The shaft 93 is moved axially to drive the carriage in one direction or the other by fingers 96, 97 on a shaft 95, which is operated by a knee-lever 72, Fig. 10. The latter moves vertically a rod 75a carrying a spring-finger 113, which rides up one or other inclined surface of a tumbler 76 to cause a lug 114 or 115 and pin 111 or 110 to operate a rocker 109 connected to the rod 95. The inclined parts of the tumbler 76 are so arranged that the pin 113 engages a different lug at each successive operation of the kneelever 72. The rod 95 is locked in adjusted position during the traverse of the plate 61 by a spring-plunger 102, Fig. 8, engaging recesses in it, and when the plunger is released at the end of a traverse by a dog 106 or 107 engaging a wedge block 108 the rod 95 is returned to central position by a spring-pressed roll.