Patent GB-341987-A (GB)
Title: Vulcanized rubber overshoes and method of manufacturing same
IPC: A43B3/16
Filed: 1929-10-29
Abstract: 341,987. Overshoes. BARON H.,231, Strand, London.-(Miller Rubber Co.; Akron, Ohio, U.S.A.) Oct. 29, 1929, No. 32836. [Classes 17 (i) and 17 (ii).] Uppers, machines for.-A wide cuff 39, Fig. 21, of unlined rubber sheet so as to be washable on both sides is attached to the top edge of the upper of a rubber overshoe, the junction being covered by a foxing strip 39<1>. The cuff is slit, preferably in line with the opening slit 13, and the overlapping portion of the cuff removed. The cuff fits snugly against the leg in the turned-up position when it is used as a protection for the stocking, and it may be turned down to set against the upper when desired. In makirg the overshoe, the top, vamp, quarters, and portions of the heel are formed from a single unit made by vulcanizing together a fabric lining 1 and a thin rubber sheet 2 cut to the shape shown in Fig. 5 from a low temperature curing rubber containing a fast curing accelerator. A skim coating of ordinary rubber compound is calendered to that surface of the lining which is to contact with the sheet 2, and the sheet 2 is somewhat larger than the lining 1 to expose marginal rubber surfaces for attachment. The lining 1 and sheet 2 are assembled by placing them at corresponding positions on the peripheries of geared drums 3, 4, Fig. 2, at locations determined by retractal pins 3a. As the drums rotate the parts are pressed together. The upper blank is centrally slit at 13, and corresponding members of a fastening, such as the stringers 22, Fig. 8, of a fastening of the kind shown, are attached to the edges adjacent the slit by rolling pressure. The edges adjacent the slit 13 may be folded back on themselves to form flaps. For purposes of facilitating such attachment, shaped templets 42, 40, Fig. 8, are employed. A bellows tongue consisting of two superposed sheets of similar material to the lining 1 and shaped as shown in Fig. 3, may be attached to the edges of the upper unit adjacent the slit 13 on the inner face of the upper. A fly strip of rubber 23 with a lining is attached to the stringers 22 and upper unit to cover and protect the fastenings during vulcanization. A finishing strip 25 with a central longitudinal guide-mark for slitting the fly strip after vulcanization is complete is provided on the fly strip. An insole covering the breast of the heel is applied to a metal last and the upper unit is placed thereon and its edges pulled over and secured to the insole, the edges 7, 9, Fig. 5, being united at the heel of the upper. After trimming, a binding strip is applied to the edges. A heel lift of thick rubber lined with fabric and a half sole of friction fabric are next applied. A reinforcement of friction fabric is next applied to the back seam and covered by a larger back 31 of similar shape of rubber sheet which is rolled on. An outsole 32 and foxing strip 33 complete the shoe. A strap 34 of rubber partly lined with fabric may be vulcanized at one side of the upper at the top adjacent the opening 13, and provided with a press-stud fastener for engagement with a corresponding member on the upper. The strap 34 may carry an ornamental mock buckle 38 to conceal the slide of the fastener.