GB418669A - Improvements in or relating to the production of reinforced shoe insoles, and machines therefor - Google Patents

Abstract

418,669. Insoles for footwear. UNITED SHOE MACHINERY CORPORATION, 140, Federal Street, Boston, U.S.A.-(Assignees of Whelton, J. M. ; Peabody, Massachusetts, U.S.A.) March 23, 1933, No. 8730. Convention date, March 24, 1932. [Classes 17 (i) and 17 (ii).] A reinforced insole, more especially for cement process shoes with very narrow shanks, comprises an insole member proper to which is secured by adhesive an elongated reinforcing member of fibre, leatherboard, or leather extending over the heel end and the shank to the break line of the insole, and one of these parts is moulded transversely so as to assume the shape of the bottom of the last when due allowance has been made for its reaction after moulding. The insole proper 32, Fig. 16, may be simultaneously moulded with the reinforcing member 34, or it may be moulded to the shape of the moulded reinforcing member during a sole laying operation. The moulding or sole laying pressure may be utilized to unite the adhesive-coated reinforcing member and insole. A metal shank stiffener 36 located, as shown, in apertures, or in a recess, in the insole or its reinforcing member, may be provided between these two members 32, 34 so as not to interfere with the cement bond between the upper and insole, and outer sole and upper at the shank. The insole 32 and reinforcing member 34 may be cut by a rounding operation wherein a knife 38, Fig. 3, operates in relation to a pattern 40 on which work is held by a clamp plate 42. A gauge 46 may be placed at the break line on one side of the pattern 40 so that it may be used also for cutting out the reinforcement members 34. Apertures 50 are formed in one of the members 32, 34 to receive the ends of a shank stiffener 36 and these may be made by punches 52 carried by the plate 42 co-operating with the pattern 40. The insole 32 and member 34 are coated over their surfaces which are to contact with adhesive, such as latex. The insole 32, member 34, and stiffener 36 may be secured together by the co-operation of a rigid form 74, Fig. 11, and a yieldable rubber pad 76. The upper surface of the pad 74 extends over the heel, shank, and rear portion only of the forepart of the insole and has the same longitudinal curvature but greater transverse curvature than the last at the shank portion. The form 74 is supported on a block 84 pivotally mounted on a cross-head 82 by studs 106 so as to adjust itself progressively lengthwise from either end, if desired, to the proper angular position fully to engage the pad 76. The cross-head 82 is adapted to be reciprocated on posts 78 relatively to a head 80 fixed to the upper ends thereof. The pad 76 is secured to the underside of a carrier 86 mounted on the head 80 and is adjustable horizontally on guides relatively to the form, a set screw 92 holding it in adjusted position. A yoke 118 projecting above the upper surface of the form 74 engages opposite sides at heel end to locate the flat sides of the form 74 with the edges of the insole and pad 76. The yoke 118 is mounted on a block 124 and is adjustable horizontally. Pairs of gauge fingers 150, 152 pivoted on studs 156 engage respectively the lateral edges of the insole 32 and member 34, and the edges of insole and member 34 at the narrow forward extremities of the shank portion of the member 34 locate the insole and reinforcing member in correct angular relation to the form 74. Rearward extensions 162 on the fingers 150 are provided for opening the fingers 150, 152 to facilitate the insertion of the insole on the form 74. A vertically-adjustable abutment 170 on the pad block 86 engages one of the studs 156 to depress the gauge fingers and yoke to avoid interference with the moulding operation. After moulding, the opposite lateral edges of the shank portion of the insole are bevelled to blend with the profile of the last. The reinforcing member may be applied, if desired, to the inner or grain side of the insole.