Patent GB-1074222-A (GB)
Title: Shoe lasting machine
IPC: A43D21/16
Filed: 1965-03-24
Abstract: 1,074,222. Coating apparatus. J. S. KAMBORIAN. March 24, 1965 [April 2, 1964; May 11, 1964], No. 12523/65. Heading B2L. A mechanism for applying cement to a selected portion of the margin of a shoe upper comprises a support for the shoe assembly, an applicator which is movable towards and away from the bottom of the shoe assembly on the support, means for positioning the applicator against said portion of the margin and means for moving the applicator away from the bottom of the shoe assembly along the margin to spread the cement along the margin. Means to terminate the extrusion of the cement in response to the commencement of the movement of the applicator may be provided. In operation a shoe assembly is mounted on a support therefor with a margin portion of the upper extending upwards away from the shoe insole. The support is brought into an operative position and the upper is stretched and clamped on the support last. The applicator is brought into a position above the margin portion and lowered to contact the shoe bottom, it is then moved sideways to bring its extrusion face into contact with the margin portion. The shoe assembly support is then raised to clamp it against a hold-down fort on the applicator and cement is extruded from the applicator on to the margin portion. Shortly after the cement has been extruded the applicator is raised. This action is used to terminate the flow of cement and to spread the cement over the margin portion. When the applicator is in its raised position a heel clamping and wiper assembly is brought into position. The heel clamping device consists of inflatable means which grip the heel portion of the shoe assembly and the wiper assembly consists of a pair of wipers, pivoted together in the form of a U, which are moved so as to wipe down the margin portion on to the insole. The support means is then moved to cause the shoe assembly to be forced against the wipers where it is maintained for sufficient time for the adhesive to harden. The mechanism is then released and the shoe removed. The cement is contained in a pot 226 Fig. 8 made of heat conductive material and heated by cartridge heater 230. The well 228 of the pot is connected through a ball valve 238 with a chamber 242 having therein a plunger 270 connected to air operated motor 260. When the application of cement is required motor 260 is operated to force plunger 270 down. The ball valve 238 closes and cement is extruded through tube 208, having a heating wire running therethrough, to the applicator device (Fig. 6). This consists of a plunger 166 the movement of which is controlled by compressed air inlets 178, 182 and which has an annular groove 170 and an axial passage 172 (not shown) connected to the groove 170 and extending to the bottom of the plunger. The plunger has connected to the bottom thereof a strap 196 to which is attached the applicator head 186. An annular groove 198 in the plunger 166 communicates by passages 202, 204 with a cavity 194 in the applicator 186 and the cavity 194 has outlets 192 on to the application face of the applicator. The tube 208 from the cement extruder connects with a passage (not shown) in the housing 154 and this passage is aligned with the groove 170 when the plunger 166 is in its lowered position so that there is then communication from the cement extruder mechanism to the applicator head 186. As soon as the required amount of cement has been extruded the applicator plunger 166 is moved upwards so that the groove 170 is no longer in register with the said passage in housing 154 and the supply of cement is cut off. Upward movement of the applicator head 186 spreads the extruded cement over the marginal portion.