Patent GB-479433-A (GB)
Title: Improvements in or relating to methods of making shoes with ribbed insoles
IPC: A43B13/39
Filed: 1936-08-01
Abstract: 479,433. Boots and shoes. LITTLEWAY PROCESS CO. Aug. 1, 1936, No. 21335. Convention date, Aug. 8, 1935. [Class 17 (ii)] Insoles.-Footwear with a flexible forepart is made by providing an insole similar to the type described in Specifications 415,315 and 422,509 comprising a thin flexible forepart reinforced by a stiff backing piece removably secured thereto and a relatively inflexible shank piece, with rib means stitched on the outer face of the insole and to which an upper is secured in lasted relation by staples, excess portions of the upper and rib means being then trimmed off and an outsole secured to the shoe bottom after which the backing piece is removed. If desired, the thin flexible forepart of the insole may be removed with the backing piece. In the form shown in Fig. 1, a thin flexible forepart member 32 of paper or thin fibre board is assembled in overlapping relation with a relatively thick and inflexible shank piece 30 and a backing member 34 preferably of fibre board or similar material and secured adhesively. Lasting ribs 40 are secured by stitches 42 to the outer face of the assembled insole members on both sides from tip line to heel breast line, but these stitches 42 do not pass through the rear end of the backing piece 34 which is narrowed into a tab 36. The insole is moulded to shape, assembled on a last with an upper and pulled over. Side lasting may be performed in accordance with the method described in Specification 355,332 and the lasting operation at the sides of both the shank portion and the forepart may be performed by a machine of the kind described in Specification 283,978, [Class 17 (i)], or the toe portion may be lasted with the aid of a bed lasting machine. After the cement has set, surplus upper and rib material is trimmed away to provide a relatively smooth surface for reception of an outsole. If desired, the staples which secure the upper in the shank portions to the ribs 40 may be left in the shoe after trimming. When the sole laying cement has set, the backing piece 34, together with part of the paper forepart 32, is pulled out by grasping the tab 36. The overlasted margin of the upper stiffened with cement at the forepart takes the place of the insole, and an outsole is throughstitched and a slip insole inserted to cover the margins of the upper. In a modification, when it is desired to leave a thin flexible member permanently in the forepart to cover the margin of the upper, the insole comprises a relatively thick and inflexible shank piece 64, Fig. 12, and a thin flexible forepart member 66, e.g. of upper leather or calfskin secured in overlapping relation by adhesive, and with lasting ribs 70 secured to the outer face by through and through stitches 72. A backing piece 74 of fibre board extending rearwardly to about the middle of the shank portion is lightly cemented to the member 66 but with its rear end free to facilitate subsequent detachment, and the shoe is made in similar manner to that described above. In a further modification, combining features of the two previous constructions, the insole comprises a relatively thick and inflexible shank piece 86 and a thin flexible forepart 88 reinforced with a fibre board backing piece 90, all lightly secured by cement. The rear end of the piece 90 is reduced in width to form a tab 95, the stitches 98 which secure lasting ribs 96 to the members 86, 88, lying outside the tab portion of the backing piece rearwardly of the ball line. Lasting and trimming are performed as before. If the stitches 98 forwardly of the ball line are not severed in the trimming operation this may be done by a roughing wheel in a roughing operation. The bottom is levelled by filling material, if necessary, and an outsole is secured with the aid of a machine of the type disclosed in Specification 408,953.