Patent GB-391451-A (GB)
Title: Improvements in or relating to boot or shoe lasting methods and machines
IPC: A43D21/12
Filed: 1931-07-27
Abstract: 391,451. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., GOULDBOURN, J., RICKS, F., ROBERTS, W. T. B., WOODCOCK, R. B., and CHOICE, F. C., Union Works, Belgrave Road, Leicester. July 27, 1931, Nos. 21355, 23857, and 33757. [Classes 17 (i) and 89 (iii).] Lasting.-Relates to heel seat lasting machines of the kind including a pair of wipers each operating to effect lasting along one of the opposite sides and a portion of the rear of the heel seat of a shoe and through each of which wipers the machine drives a gang of fasteners into shoe-upper material wiped on to the shoe bottom by the wiper, and consists in detail improvements. Each of the pair of wipers is adjustable about the inner corner on a carrier guided so that the concluding wiping movement is closing only, and is actuated by a driving link, the wipers being guided by cam devices each comprising spaced cam-engaging members interposed between the carriers and their supporting means. The wipers have yieldable portions at their toe-ward ends. The shoe bottom is engaged by a plurality of holddowns spaced apart and severally adjustable. Shoe positioning is facilitated by a member engaging the heel end, automatically removed in the course of wiping. Alternate hold-downs are provided for large and small shoes, and means are provided for preventing overlap of hold-down and wiping movement. Last side supports are provided to render a toe rest unnecessary. Access is possible to the fastener driver paths between the upper and lower surfaces of the wipers. The machine is generally similar to that described in Specification 235,286, [Class 17 (i), Boots and shoes, Apparatus for making &c.], modified as described in Specifications 316,025, [Class 17 (i), Boots and shoes, Apparatus for making &c.], 351,386, 370,024, and 385,976. The jack and its operating mechanism is generally similar to that described in Specification 235,286, [Class 17 (i), Boots and shoes, Apparatus for making &c.], but is swung back to carry the heel end of the shoe into the heel band by a treadle continued operation of which raises the jack to bring the heel seat of the shoe up to the hold-down. No toe rest is provided, and the last pin is capable of slight lateral movement and considerable tip in the direction of the length of the shoe, it being mounted in an arc-shaped guide 253, Fig. 32, and urged rearwardly by a spring plunger 254. The pin may be tipped as desired by a handle 255. The cam lever 5, Fig. 21, described in the prior Specification for pressing the heel end of the shoe rearwardly into the heel band, is connected to the pawl carrier 8 by a spring 10 threaded over a rod 6 and compressed between a pin 7 on the pawl carrier and an adjusting nut 9. The wiper-carrying plates 21, Figs. 3 and 16, carry rolls 24, 25 engaging cam grooves in a cover-plate 28, the grooves being so shaped that the concluding movement of the wipers is closing only, unaccompanied by forward movement over the heel seat. The wipers are actuated by push-rods 19 pivoted to levers 16 having toothed segments at their inner ends engaging a double rack 13 slid by a roll 12 engaging a cam. The connection between the levers and push-rods is adjustable, a second hole being provided at the extreme end of the lever for small shoes. The plates 21 have arcuate guideways for ribs 31 on the wiper members 32, the ribs being concentric with the inner corner of the wiper blocks 33. To adjust the wipers for size of shoe each wiper block assembly has an outwardly extending arm 44 terminating in an indicator 53 moving over a scale. A latch 46 is normally depressed to engage one of a series of notches 47 to hold the wipers in their adjusted position, and is raised by a finger-piece 52 to allow adjustment. Each block 33 has nine tack pockets. Detachable end members may be secured by a screw 59, Fig. 5, and dowel pin 60. These end pieces may have wiper portions 63 which yield against a spring 65, or may be non- yielding. They may be narrow or wider and provided with one or two tack holders respectively. The tack head may be supported by a spring 36, Fig. 18, which allows access to the driver passage. The tack separating and delivery mechanism is constructed substantially as described in Specification 28474/10, [Class 17 (i), Boots and shoes, Apparatus for making &c.], but two tack pots 77, 78, Fig. 23, are provided for different sizes of tacks, either being oscillated by a rack 82 sliding in a guide pivoted at 86. To engage either the pinion 83 or the pinion 84 with the rack, an arm on the guide has a pin engaging an inclined slot 88 in a slide block actuated by a handle 92, Fig. 1. A second handle 95 actuates arms which swing into the path of lugs on the yieldingly driven pots, stopping their movement. This handle also actuates a slide passing under the driver slide after this has been raised by its cam to prevent its return by the usual spring to depress the drivers. An interchangeable hold-down 107, Fig. 24, is carried by a removable pin 109 at the end of the horizontal arm of a bell-crank lever 111, Fig. 1. The hold-down is guided by plates 113 slotted to guide a pin 117 in the holddown. The vertical arm of the lever is adjustably connected to a rod 123 operated by the cam assembly 11. A presser foot 130, Fig. 24, engages a recess in a pin 132 rotatable in the hold-down, this pin carrying a small pin 134 engaging a slot in the foot. The foot is adjustable by a nut 141 on a rod 136 sliding in a springy guide 143, this guide allowing yield of the foot as the wipers advance. The rod 136 is pivoted at 137 to a member 138 slidable on the hold-down. The pin 137 enters slots in levers 145 pivoted to the hold-down and engaging pins 148 in the plates 113 so that the foot 130 is maintained at substantially the same level as the hold-down rises or descends. A further shoe-bottom support 150 is vertically adjustable by a screw 152, Fig. 1, in a bracket pivoted on the pin 109 and forwardly and rearwardly adjustable by a screw 154. A thin plate 160, Fig. 31, between the meeting edges of the wipers may be substituted for the foot 130. Rests 166, adjustable towards or from each other by a right-and left-hand screw, may be substituted for the rest 150. The heel band is supported and operated as described in Specification 235,286, [Class 17 (i), Boots and shoes, Apparatus for making &c.], except that at the front ends blocks 170, Fig. 19, are formed with upper and lower flanges embracing projections 174 each carrying a pin engaging a slot in the lower flange. The members 174 are carried by the band-closing arms. The pinion 181, Fig. 1, similar to that described in Specification 235,286, [Class 17 (i), Boots and shoes, Apparatus for making &c.], for operating the heel band and giving the jack the final positive pull, is actuated by a segment 180 on an arm pivoted at 178 and provided with a cam roll on an eccentric portion of a shaft 183 fixed to an arm 184 urged clockwise by a spring 189 which tends to straighten toggle links 186, 188. Should the machine stall by failure of the wipers to advance, a handle 192 is pulled to break the toggle and swing the roll away from its cam to release the clamping pressure and allow the machine to complete its cycle. The last is supported by members 195, Fig. 28, at about the rear end of the waist, the members being pivoted to bellcrank levers 198 actuated by links 205 connected to an equalizing lever 207 pivoted to an arm 209 resiliently actuated by a rod 212 connected to the cam lever 5. The members 195 are centralized by a T-bar 220 and a spring. Horizontal rubber-covered bars 229, Fig. 1, are arranged one on each side of the jack to enable the operator to preliminarily position the upper materials by using the bar as a toerest while manipulating the upper, first on one side and then on the other, before actuating the jack treadle. To prevent damage by overlap of wipers and hold-down, the hold-down for men's shoes has an extended .pin 117 the ends of which engage levers on pivots 233, Fig. 16, the other ends of the levers engaging spring plungers 235 which can descend only when the arms 44 have been adjusted for a large shoe. Specification 370,495 also is referred to.