Patent GB-585121-A (GB)
Title: Improvements in or relating to machines adapted for lasting shoes
IPC: A43D25/053
Filed: 1945-02-05
Abstract: 585,121. Lasting-machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. Feb. 5, 1945,. No. 2787. Convention date, Feb. 17, 1944. [Class 17 (i)] A machine for lasting shoe uppers or performing comparable operations such as the stretching, drawing-in and adhesive-securing of a platform sole binding or cover, of the kind in which the upper is stressed by a rotating roll which imparts a frictional heightwise drag to it and also feeds the shoe so that the roll operates progressively and continuously along the margin of the upper, comprises a roll and a co-operating non-rotary pressure member which are so arranged that the upper is tensioned heightwise of the last and the margin is drawn in over the shoe bottom, and a rotary wiper for laying the margin on the shoe bottom. The roll is mounted with its axis inclined to the shoe bottom in a direction lengthwise of the shoe, the pressure member has a concave surface partly embracing the roll, and the wiper is a disc rotating on a substantially vertical axis or a cylindrical member rotating on a horizontal axis. An edge gauge and a hold-down are provided. The roll and pressure member can be separated, the wiper elevated and the edge gauge withdrawn at the end of a lasting operation. As shown, Fig. 1, a post 18 supports the conical roll 10, pressure member 12, wiper 14 and edge gauge 190, and the hold-down 300 against which the operator holds the bottom of a shoe, on its last, with the upper margin threaded between the roll and member. The roll 10 is secured to a shaft 26 journalled in a block 28 slidable in a member 30, and is rotated from a motor 284 by a belt 42. The block 28, and with it the roll, are held in their rearmost, operative, position by a spring 54. The mounting of the block 28 and member 30 is such that the inclination of the roll both lengthwise and laterally of the shoe may be varied. Lengthwise adjustment varies the feeding component of the frictional drag on the upper, Lateral adjustment enables the roll to draw the margin of the upper somewhat outwardly of the insole edge during up-drawing, as shown in Fig. 6. The pressure member 12 is a part-sleeve which embraces the roll, Fig. 6. It has a guide surface 316 at the entering side for the upper margin, and at the other side extends inwardly of the shoe edge, so that the margin is drawn inwardly, ready to be folded down by the wiper, after it has been stretched heightwise. The member 12 may be tapered as is the roll 10, or may be cylindrical so as to diverge from the roll at the upper end of the latter, and may also be stepped away from the roll at the leaving side of the upper margin, so that the grip on the latter is reduced both at the upper end and the leaving side of the roll. The member 12 is carried by a slide 100 slidable in a block 102 which' partakes of the adjusting movements imparted to the roll, and is pressed towards the latter by a spring. The member 12 may be moved away from the roll and the roll then moved forwardly of the machine by; respectively, a link 120, a cam bar, and a slide 144, and a link 94 embodying a lost-motion connection 88, the link 94 and the slide 144 being operated by a treadle rod 178 with a spring 180 which acts normally'to hold the roll and member in operative position. The edge gauge 190 is moved rearwardly, when the member 12 is moved, by means of the slide 144. The wiper 14 is a disc-like member provided on its lower face with a series of slightly coned teeth 213, the leading edges of which are inclined to the edge of a shoe being operated on, so that the margin of the upper is smoothed down by a wiping action which has a component operating in the direction of feed. The wiper is mounted on a shaft 212 rotated by a pulley and belt 270, is pressed towards the shoe by a spring, and can be raised from the shoe by a lever 250 and treadle rod 256. The shaft is journalled in a bearing 230, the inclination of which can. be. adjusted. The hold-down or shoe bottom rest 300 extends part way around the roll 10 and has a turned-up toe portion 304 to facilitate sliding over the shoe bottom. In operation, the treadles are depressed to separate the roll and pressure member, withdraw the edge gauge, and raise the wiper. The operator holds a shoe with its bottom against the hold-down and its upper margin threaded between the roll and pressure member. He then releases the treadle which controls the roll, member and edge gauge. The operator holds the shoe firmly until the roll has taken a grip on the upper' and tensioned it heightwise, and then permits it to be fed by the roll, at the same time releasing the treadle which controls the wiper. The upper is then progressively tensioned heightwise and turned inwardly by the action of the roll, and the margin, which has been coated with adhesive, is laid on the shoe bottom by the wiper. A modified wiper for use on shoes the bottoms of which have curved portions, comprises a cylindrical member 410, Fig. 12, provided with grooves 412, which is supported with its axis horizontal by means of a bracket 418. The latter is adjustable for varying the inclination of the wiper relatively to the edge of the shoe bottom and is pressed downwardly, to hold the wiper in wiping position, by a spring 440. As shown, the wiper is not adapted to be raised as is the wiper 14, but means may be provided for doing so. The wiper 410 is rotated by the belt 270 through bevel gears 462, 464, and is removable from the bracket 418. Specification 558,897 is referred to.