Patent GB-684632-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/12
Filed: 1950-04-25
Abstract: 684,632. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., BARTON, G. C., and ELLIOTT, H. E. April 24, 1951 [April 25, 1950], No. 10120/50. Class 17 (i). Relates to a machine of the bed-lasting type more especially for conforming the toe ends of uppers of shoes wherein the upper is cement lasted to a light flexible ribless insole, and is concerned with means (1) to position and support the shoe in correct location with respect to the wipers, (2) to hold the edge portions of the insole at the toe against the last bottom to prevent buckling as the wiping means commence their inwiping operation, (3) to prevent adhesion of the tacky margins of the upper and insole until the conforming operation has been satisfactorily completed. In an illustrative form of machine, Figs. 1, 2, 3, the pulled-over upper and insole on a last is supported, bottom up, in the machine, a pin 15 (not shown) on a post 11, Fig. 1, being engaged in a thimble hole in the heel end, and a resilient toe rest pad 19, Figs. 1, 2, supports the toe end in relation, lengthwise and widthwise, to the wiping means. The machine also has a toe end gauge 23 positioned longitudinally relatively to the wiping means, to assist operator to position shoe, but movable to an out-of-way position, after this has been done. Also there are a shoe bottom engaging member 21, Figs. 1, 2, 3, and a heel rest 17, both of which may also be moved to out-of-way positions when the shoe is presented to the machine, to give a clear view to the operator. The member 21 is moved by operator-actuated means to a position overlying the shoe bottom and then downwards relatively to the wipers to clamp the shoe against the toe rest 19 and also to cause the heel rest 17 to yieldingly engage the shoe heel, when it is locked against reverse movement. The toe rest and last pin are locked against heightwise movement and the toe end gauge 23 is moved to inoperative position. An insole edge hold-down 25 supports the edge of the insole against buckling during inwipe. The post 11 is pivoted at its lower end on a bracket 63 pivoted on a pin 67, and also about a pin 61, against spring action, so as to be movable lengthwise and transversely to permit shoe to be placed on the last. The member 25 comprises a concave plate 281 of spring steel of the shape of the toe end of the insole so that its edges may be pressed resiliently against margin of the insole during inwipe. It may be brought automatically into operation on jacking the shoe into position by a hand lever 183 on shaft 445, or it may be performed manually at the will of the operator after the shoe has been jacked, by operating a knob 356 on an arm 299. Plate 281 is movable to an inoperative position after overwipe. The toe-embracing wipers 631 and their carriers 633 are generally similar in construction and operation to those described in Specification 461,326, but the hydraulic assistance means are omitted. After the shoe has been correctly positioned and presented in correct relation to the wipers, by the aid of hand lever 183, or, if desired, the hand knob 356, the shoe bottom rest 21, which is secured to one arm 223 of a threearmed lever 225 (Figs, 2, 3), is moved down to a predetermined but adjustable position to determine, irrespective of the thickness of upper or insole materials or size of shoe, the heightwise position of shoe relatively to the wipers. Point at which he may commence inwiping operation may therefore be readily determined by the operator. When a rod 259, Fig. 3, is downwardly actuated when shoe is being jacked in the machine and after it has been swung to a position determined by the toe end gauge, the rest 21, by a two-armed lever 405, 407 connected by a link 401 to a lever arm 361 connected to lower end of pillar 335, and also holddown 25 are moved to inoperative position. After overwiping operation, hold-down 25 is moved to inoperative position without disturbing the rest 21. The pressure of the wipers is slightly released after overwipe to permit the hold-down 25 to escape from beneath the lasting margin. The member 25 prevents premature adhesion of pre-trimmed and pre-cemented upper materials and insole, or of those which have been trimmed and cemented after being presented to the machine, so that either tacky or non-tacky adhesive may be employed. Setting of the adhesive may be accelerated by a heated tool such as that described in Specification 634,620. The machine comprises a multi-part frame 3 of box-like form with a partition extending from side to side, and the front wall has a V-shaped opening, Fig. 1. The machine head and associated parts are supported on a trunk 639 which extends through a casting 9 on the left hand side of frame 3. The toe rest 19, which with the post 11 supports the shoe in the machine, is mounted for heightwise adjustment in a screw-threaded sleeve 37, thus resiliently supporting the toe end by means of a spring 41. The rest 19 is locked in adjusted position under the control of a link 55 secured to an arm 59 on a shaft 47, towards the end of the downward movement of the rest 19, during the process of jacking the shoe, by a pair of staggered pawls 45 on the shaft 47. The link 55 which initially holds the pawls out of engagement is operatively linked, by an arm 477 secured to a shaft 451, to mechanism by which the other mechanisms mentioned are automatically operated and under control of the handle 183. The toe end gauge 23 is secured to an arm 185 secured to a shaft 187 journaled in a bracket 189. A pin 201 in an elongated slot 199 in one end of a link 197 is operated periodically to engage one or other of the ends of the slot to swing a two-armed lever 192, 193 (not shown) secured to the shaft 187. A spring 205 anchored to an arm 209 on the bracket 189 is attached at the other end to a link 203 connected in turn to the arm 192 in such manner that, when the gauge 23 is in operative position, it is held by the spring. Movement of link 197 in one direction, after the gauge has served its purpose in positioning a shoe, causes it to move to an inoperative position out of the path of the wipers 633. Specification 668,204 also is referred to.