Patent GB-121182-A (GB)
Title: Improvements in or relating to Machines for Making Insoles.
IPC: A43D43/02
Filed: 1917-12-06
Abstract: 121,182. British United Shoe Machinery Co., (United Shoe Machinery Co.). Dec. 6, 1917. Channel-opening.-A machine for making welt insoles is provided with improved lip-setting means, lip-slashing devices, knife-lifting mechanism by which the knives are cut out of the stock at the breast line, and means to bevel the edge of the unlipped face of the insole. The invention is described as applied to the machine described in Specification 25730/06, the construction and method of operating the channel knife 1, Fig. 3, edge knife 2, presser-foot 3, feed-foot 4, Fig. 6, work-support 5, Fig. 3, and edge gauge 6 being substantially the.same as is described in the prior Specification, except that the knife 1 is adapted to form the usual welt-insole channel, Fig. 3, while the presser-foot 3 is bifurcated at .7, 8 to form separate feet for the two knives. The lip is set by a hammer 9 having a curved face 10 for bending the lip over towards the between-substance, and a flat face 11 for hammering the bent lip down upon the between-substance. The hammer is carried by a spring-encircled spindle 12 mounted in the usual spring-pressed knife-carrier 13, and is actuated by a dog 19, Figs. 1 and 4, pivotally mounted on a block 20 secured to a pivoted arm 17, which is oscillated through an adjustable rod 24 and cam-lever 25 from a drum 27 on a driving-shaft 28. The dog 19 is formed with a body portion to engage the upper face of the hammer, and with a nose 21 which is held by a spring 23 continuously in engagement with a wall 22 on the hammer. As the arm 17 swings about its pivot, the block 20 is moved downwards and inwards, causing the dog to turn about its connexion with the block to actuate the hammer. To bevel the edge of the unlipped face of the insole, the edge gauge 6 carries a bevelling-knife 30, Figs. 3 and 8, having an offset portion 31 which passes through a slot 32 in the gauge and terminates in a cutting-edge 33; the lower edge of the knife is formed with a tapered foot 34 which engages between the insole and the worksupport 5 and ensures the complete severance of the bevel string.. To permit the easy turning-up of the lip at the shank, the feed-foot 4, Fig. 6, carries a laterally-extending knife 35 which cuts a transverse slit in the margin of the insole in advance of the knife 2; when the position of the edge gauge is advanced for producing a narrow feather round the forepart, the knife 35 strikes outside the edge of the insole and is therefore inoperative. The knife slide 13 is connected bv a rack and segment 37, 38, Fig. 1, to a rod 39 having a lost-motion connexion 42, Fig. 2, with a rod 40 connected to a treadle 41, which is connected to the work-support by a chain 44 of which a few links are normally held slack by a spring 45. To stop the cutting of the knives, as when they reach the heel breast, the treadle is depressed to raise the knife slide 13 and to straighten the chain 44 without, however, lowering the work-support. This causes the knives, which are embedded in the work, to lift the insole from the work-support. The feed-foot 4 is then lowered by its spring to grip the insole, and the resultant of this downward pressure and the feed movement of the foot causes the knives to leave the work diagonally in the line of feed. A further depression of the treadle completes the elevation of the knife slide 13 and lowers. the work-support for the removal of the work.