Patent GB-728054-A (GB)
Title: Improvements in or relating to the conforming of shoe uppers
IPC: A43D25/06
Filed: 1952-01-23
Abstract: 728,054. Lasting Machines BRITISH UNITED SHOE MACHINERY CO., Ltd., LUTYENS, J. L., and PRATT, J. W. Jan. 21, 1953. [Jan. 23, 1952], No. 1821/52. Class 17 (1). A machine for lasting the end portions of uppers and securing the marginal portions to shoe bottom members by adhesive comprises shoe supporting means, a pair of wipers 3 to wipe the margins inwardly, power operated means to close and open the wipers, the wipers being arranged, after completion of the inwiping, to remain in pressing engagement with the margins while the adhesive at least, partially sets, and additional pressing means arranged, while the wipers are thus engaged, to press the material extending inwardly of the wipers. The additional pressing means comprises a pair of members 1 with means for opening and closing the members before' they' engage the work, the members being closed so as to press the upper just inwardly of the inner edges of the wipers when the latter have completed inwiping. Upper retarding means are provided, the wipers effect more than one inwiping operation, and the additional pressing means are supported out of pressing engagement until the wiping operation is completed and then pressed against the work. Power operated means bring the wipers to rest and press the additional pressing means first with an impact blow and then with a sustained pressure. The machine is similar to those described in Specifications 470,749, 482,275, 489,649, 510,086, and 519,775, but is without tacking arms and tubes. Carrier plates 8 for the presser plates 1 are supported by a table 7 itself supported on links 6. The. plates 1 having ridges 2 on their underside which are generally similar to the outline of the inner edge of the wipers, are of greater depth than the wipers and have flat underfaces 4, partake of the advancing and closing movement of the wipers and descend and advance further to bring the ridges 2 on to the work. Slots in links 6 allow plates 8 and 1 a small amount of free vertical 'movement relative to the links when ridges 2 encounter the upper surfaces of the wipers at the start of the second wipe and later the wrinkled lasted margin, and when the plates 1 are forced down relatively to the links. The ridges 2 slide over the wipers on to the pleated toe portion of the lasted upper. The pressure applying member 9 has a downward extension 10 with a horse-shoe member 11, the under surface 12 of which strikes plates 8. The cam controlling the clutch is modified so that the clutch has three stropping positions. The machine may be operated in conjunction with a spray cabinet and a toe heater. Cement is applied to the insole and lasting margin of a heated shoe which is then presented, and the machine is tripped a first time for the first wiping operation, the shoe inspected; the machine tripped a second time for a second wiping operation and the application of the presser plates, and a third time to complete the cycle. Heating elements may be added to shorten the time for drying the cement. Specifications 412,198 and 469,805 also are referred to.