Patent GB-476496-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/12
Filed: 1936-06-09
Abstract: 476,496. Lasting-machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation) June 9, 1936, No. 16068. [Class 17 (i)] A shoe-upper conforming machine of the kind shown, for example, in Specifications 22630 /08, 19512/11, and 142,931, [all in Class 17 (i)], comprises toe-embracing wipers for urging the margin of the toe portion of an upper across the bottom of a last, a toe rest for engaging the upper at the forepart of the last, and upwiping devices movable heightwise of the shoe for wiping the upper at opposite sides of the shoe towards the shoe bottom. The sole of the shoe may be engaged by a hold-down' device. The shoe is supported bottom upwards at the heel end by a jack 10 and at the toe end by a toe post 12. Toe-embracing wipers 16, operated by a handle 18, are mounted on a wiper head 14, which is adjustable so as to bring the wipers into the correct position relative to the shoe. The wiper head is mounted on a support 20, which can be raised and lowered by a treadle 26. Heel-lasting mechanism is carried by a head 32 movable horizontally, and is locked in a definite operative position by a latch 34. By means of a hand-wheel 36, the jack 10 can be moved to bring the shoe into engagement with the heellasting mechanism. Movement of a knee lever 42 causes a power rotated cam-shaft to close a heel band 37 in the heel-lasting mechanism, about the heel and to raise the toe post 12. The toe post 12 slides in a vertical sleeve 72 adjustable in a horizontal direction, and is provided with an adjustable screw 76 which abuts against a table 28, which is raised and lowered by the previously mentioned power operated cam-shaft. The hold-down comprises a downward projection 50 for engaging the shoe bottom near the ball portion thereof on the end of a horizontal arm 52, and a finger 54 rotatably mounted at the end of the arm 52 and spring-pressed against the toe portion of the shoe bottom. The hold-down is adjustable forwardly and rearwardly of the machine and can be depressed by means of a treadle 40. The toe rest comprises a resilient pad 66 mounted in a holder 64. The holder is provided with flanges 122, Fig. 4, between which are mounted spindles 124 carrying rollers 120. The rollers run in an arcuate slot 118, Fig. 2, formed in a support 68, so that the toe rest is free to rotate about a horizontal axis running transversely of the shoe at about sole level. Depending from the support 68 is a hollow stem 70 which slides within the toe post 12. A spring 78 engaging the lower face of the hollow stem 70 presses the toe rest firmly against the shoe when the toe post is raised. A sleeve 86 surrounds the upper end of the toe post and a pin 80 extends through apertures in the sleeve and through vertical slots 84, Fig. 6, and 82, in the toe post 12 and in the hollow stem 70 respectively. A spring 88 within the hollow stem presses at one end against the pin 80 and at the other against the top of the stem. Side-wiping members 102, preferably made of rubber, are secured to blocks 104 which are pivotally connected to rods 94 by pivot pins extending lengthwise of the shoe. Each rod 94 slides in a sleeve 96 rotatable around an axis 98 also extending lengthwise of the shoe. The ends of the rods 94 opposite to the wipers are guided in blocks 92 pivotally connected to arms 90 by pins parallel to the axis 98, the top and bottom surfaces of the blocks being engaged by collars 108 fast on the rods. The arms 90 are pivotally attached to the toe post 12 by pins parallel to the axes 98. The upper ends of the arms 90 engage cam surfaces 116 on the sleeve 86 and are pressed against them by springs 112, each of which engages the toe post at one end, and an extension 110 of an arm 90 at the other end. The inward movement of the arms 90 is limited by stop screws 114. At the commencement of the up-wiping operation, the parts of the up-wiping device are as shown in Fig. 4. As the post 12 is raised, the spring 78 is compressed and the arms 90 engage the cam surfaces 116 causing the wipers 102 to grip the shoe. When the upward force exerted by the arms 90 on the cams 116 is sufficiently great to compress the spring 88, the sleeve 86, which carries the cams, rises but still keeps the wipers 102 pressed against the upper. When the upwiping operation is complete the toe embracing wipers are operated to urge the margin of the upper over the bottom of the last.