Patent GB-457046-A (GB)
Title: Improvements in or relating to shoe-upper lasting machines
IPC: A43D75/00
Filed: 1935-05-22
Abstract: 457,046. Boot - making machines. UNITED SHOE MACHINERY CORPORATION, Paterson, New Jersey, U.S.A.- (Assignees of MacKenzie, F. L. ; Beverly, and Blanchard, B. B.; Swampscott, both in Massachusetts, U.S.A.) May 22, 1935, No. 14884. Convention date, July 18, 1934. [Class 17 (i)] Lasting.-Machines of the kind described in Specification 294,640, [Class 17 (i)], are adapted for use when cement secures the upper in lasted relation to the sole. Staples may be inserted at the waist and cement used at the forepart. Preferably, a handle is provided which is moved from one extreme position to the other as the type of securing means is to be changed. In one position the machine operates as described in the prior Specification. In the other position the wire feed for the staples is stopped and a slide is projected underneath the staple nozzle and the deflector for curving the staple legs, which slide then serves as an overlaying device instead of the staple nozzle deflector previously used. On this device reaching final position a hammer blow causes it to urge the portion of the upper engaged thereby firmly against the sole. The side gauge also, is moved rearwardly and upwardly so that the whole width of the upper margin is wiped inwardly by the overlaying device. The staple driver slide also is retracted in its guideway to prevent it striking the deflector. The lasting and stapling mechanism is constructed substantially as described in the prior Specification, with a side gauge 10, a shoe bottom rest 12, a pair of gripper jaws 14, and a slide 16 moving along a guide way and carrying a staple nozzle 28, a staple driver and a staple deflector 32, the driver being secured to a slide reciprocated by a lever 38 pivoted at 40 and actuated by a lever 45. To a bracket 144 on the head of the machine is pivoted at 140 a handle 138 which is held by a spring plunger 156, engaging one of two recesses 160, in either of two positions, one, as shown, when securing is to be by cement, and the forward position when staples are to be driven. The overlaying device comprises a thin U-shaped blade 125 adapted to straddle the staple nozzle and deflector and pivoted to a slide 124 guided to move towards and from the shoe on the slide 16. A spring 133 and adjusting screw 129 on either side of the pivot provide adjustment of the angle between the overlaying device and the slide 16. The slide 124 carries a pair of pins 132, 134 extending through a slot and co-operating with an arm 130 of a rock-shaft actuated by a link 148 from the handle 138. The length of the slot and arm 130 are such that the arm pushes the slide 124 to its limit of movement in either direction and then binds against the pin it is engaging, to lock the device in position. The overlaying device has an arm 176 cooperating with a hammer 188 pivoted at 40 and actuated by a lever 190 having an upward arm 192 formed with a cam slot engaged by a roll 196 carried by the lever 45. To prevent the staple driver striking the deflector when staples are not being driven, the levers 38, 190 turn about a sleeve on the stub shaft 40, the lever 38 engaging an eccentric portion of the sleeve. A link 218 connects the arm 176 with the sleeve, which is thus turned to retract the staple driver as the overlaying device is advanced. The gauge 10 is pivoted at 220 to a slide 222 engaging the bracket 144. The rear end of the gauge is slotted to engage a pin secured to the bracket so that the gauge is raised as it is retracted. A link 254 from the handle 138 has lost motion connection with a bell crank lever 248 engaging a block 234 adjustably secured to the slide 222 to set the gauge according to the method of fastening to be used. The slide is urged rearwardly by a spring 266 to a limit determined by an adjustable stop 270. The forward position of the gauge is similarly adjustable, a screw-and-slot connection being provided between the block 234 and the slide 222. The means for feeding the wire to the stapling mechanism is substantially the same as that described in Specification 283,978, [Class 17 (i)]. To stop this feed when staples are not to be driven a link 164 is provided between the handle 138 and a cam-actuated lever operating the pawl driving the feed wheels, to remove the lever from the cam. To prevent the hammer 188 interfering with the movement of the arm 176 when the handle 138 is being shifted, a roll 280 on an eccentric stud is arranged in the path of an arm 278 which depresses the arm 45 as the slide 16 reaches its rearmost position, this being the position of the slide when the machine comes to rest. The cams are so formed that over-wipe by the member 125 is followed by increase of pressure and then impact from the hammer 188. The member 125 is then swung upwardly, and withdrawn.