Patent GB-824564-A (GB)
Title: Lasting machine
IPC: A43D13/00
Filed: 1955-09-27
Abstract: 824,564. Lasting machines. KAMBORIAN, J. S. Sept. 27, 1955 [Sept. 27, 1954], No. 27533/55. Class 17(1) [Also in Group VIII] In a progressive lasting machine wherein the margin of the upper is gripped, fed, and pulled by oppositely rotating rolls 14, 16, the rolls are both tapered in the same direction towards their free ends and are mounted with their axes converging towards the work in a common plane extending across the direction of feed, and the roll 14 co-operating with the inner face of the margin is canted to direct its free end outwardly towards the edge of the last. Roll 14 is more slender than roll 16, but the driving gears are such that engaging points on the surfaces of the two rolls travel at the same speed. The rolls may be roughened or ribbed. The common plane of the rolls is normally vertical, but the rolls may be tilted bodily, in an arc a-a, to lie at an angle to the direction of feed, in order to increase the push or to make room for stapling &c. means, by moving the assembly along arcuate guides 26 and securing it in position by bolts 38 passing through slots 36 into holes 34. Roll 14 may be separated from roll 16 by depression of a treadle which rests in a roll 116, and bell-crank 106, 114 to move slide 90 which is connected to the roll-bearing 82, shaft 76 being slidable. The rolls are urged together by a spring which acts on slide 90 via pin 98 and is adjusted by means of hand-wheel 132. The sole is held downwardly by a hold-down 134 (not shown) projecting axially beyond the top of roll 14, or by the rounded end of the roll. The wiping means preferably comprices a fixed pressure wiper blade 138, shaped as in Fig. 7, lying directly under roll 16, and a driven conical lasting-in wiper 140 which has a helical rib 150. Wiper 140 is driven via cable 176 and heated electrically by cartridge 178, and may be adjusted vertically by means of screw 164, angularly in a vertical plane about pivot 160 by means of screw 170, and angularly in a horizontal plane by means of eccentric pin 172. Alternatively the wiper may comprise a heated blade mounted on a horizontal spindle and spring- urged about the axis of the spindle into contact with the work, the blade having a recess to house the lower end of roll 16, a shoulder which serves to position the last, and an inclined surface which gathers the margin as it enters the rolls. A reciprocating wiper may be used. The upper margin is preferably attached by adhesive, though other means, e.g. staples or tacks, may be used. As shown, adhesive from pot 206 passes through nozzle 200 which is heated by jacket 204 and projects downwardly between the wiper and the rolls beneath the lasting margin as it issues from the rolls. The pot 206 is yieldably supported, by spring 230, about a threaded spindle 218 on a slide 210 which is movable in guides 208 and engaged with the linkage operating slide 90. Thus the pot and nozzle may be moved forwardly with roll 14 by operation of the treadle, moved axially of spindle 218 about pivot 230 by rotation of the spindle, tilted about spindle 218 by rotation of nut 235, and swung about the vertical axis 226 by loosening nut 235. Specifications 541,643, 584,464, 586,330, 608,190, 654,999 and 669,011 [Group VIII] are referred to.