Patent GB-658608-A (GB)
Title: Improvements relating to shoe lasting machines
IPC: A43D21/12
Filed: 1949-08-16
Abstract: 658,608. Toe lasting machines. KAMBORIAN, J. S. Aug. 16, 1949, No. 21313 Convention date, Aug. 20, 1948. [Class 17(i)] In a toe lasting machine power - operated wipers are mounted on fixed wiper-supports, while the upper is mounted on a last supported on a jack spindle and a toe rest both of which are adjustable to position correctly any last relative to the wipers. A hand-operated trimming blade in a fixed guide is provided to trim the overlasted upper margin. A guide frame F, Fig. 3, attached to the front of a column 2 has vertical guideways in which are rolls 17 of a carriage to which a table 22 is attached and from the rear plate 14 of which an arm 19 extends having at its rear end a sleeve member 21 held between two ears on a main vertical post 26. A second table 24 is attached to a plate 25 which slides in slots in said carriage and is vertically adjustable relative to the table 22 by turning a connecting screwed post 79 by a handwheel W, Fig. 1. A casing 54, Fig. 3, mounted on the table 24 has a transverse dove-tail slide connection 55, 56 with a table 57 and a screwed rod 58 allows movement by turning a handwheel 59, Fig. 1. A table 62 is similarly connected above the table 57 and can be moved forwards or backwards by a handwheel 64. A spindle P to fit the heel socket of a last is on a carrier 69 pivoted in a rocker which is mounted on a post 66 attached to the table 64. The rocker pivoted on a shaft 68 can be tilted forwards and backwards and locked in position by turning a cam 72, Fig. 3 by a handle 74, on a shaft 73, while a lever 78 through rolls 76, Fig. 1 moves the shaft 68 axially in its bearings and tilts the spindle P transversely. Two modified forms of last supporting spindle and means for mounting it on the table 24 are described. The toe rest 93 is rotatably mounted on an extension of the main post 26, Fig. 3, and is adjustable vertically relative to the base of the post 26 together with the spindle P by a handwheel 39, Fig. 1, acting through bevel gearing 35, 36, Fig. 3. A fixed wiper support 104, Fig. 4, has studs with rolls 114 engaging in slots in wiper actuators 105, 106 to which wipers 107, 108 are removably secured. By rolls 121 on studs of links 118, 119 the actuators are pivotally connected to a cross-head 117 on a slide 101, Figs. 3, 4, which is poweractuated through gearing 100 to give the wiping action by pressure fluid entering a cylinder 137 through a valve 139 which is .controlled directly, through a rod 144 by handles 148 or by a foot treadle 50, when a latch 153 engages a detent 149. A trimming blade 122, Fig. 4, moves in a guide in the wiper support 104 and has a pin connection to a handle 133, Fig. 1, which is normally held retracted by a spring. In operation, the last with the upper fitted is placed sole uppermost on the spindle P the toe extending forward over the toe rest 93. The spindle P and toe rest 93 are then adjusted to position the last correctly relative to the wipers. The handwheel W is used to raise and lower the heel end relative to the toe rest, the handwheel 39 to adjust together the spindle P and toe rest 93 heightwise relative to the main support post 26, handwheels 59, 64 to move the spindle P, transversely relative to the toe rest to accommodate right or left shoes, and backwards for different sizes, respectively, and the handle 78 to rock the spindle P transversely to level the shoe bottom. Finally, a handle 74 is turned to rock down and lock the spindle P with the last toe pressing and securely fixed against the rest 93. The operator now depresses the treadle 50 until it is held down by a latch, thus raising the shoe bottom above the wipers while the latch 153 passes freely over the detent 149. The upper is then pulled up by hand pincers, adhesive applied to the lasting margin and insole and the upper margin spread out over the wipers and held down by hand or a hold-down device. The treadle is now released and rises, the latch 153 contacting the detent 149 to open the valve 139 to operate the wipers. As the wipers advance, the treadle 50 is again partly depressed to press the shoe up against the wipers. If required, the wipers may be made to inwipe several times by actuating the handles 148. After wiping the upper, the shoe is lowered slightly and the cutting plate 122 actuated by the handle 133 to trim the upper margin. The treadle is then released and the parts return to the starting position, the handle 74 being actuated to unlock the last for its removal. If a toe box is used, after pulling the parts up by hand-pincers, the insole is lowered below the wipers, which are advanced by actuating a handle 148, and then retracted and the toe box trimmed by a hand knife before continuing to inwipe the upper.