US 2163158 A
Description (OCR text may contain errors)
H. SCHRDER June 20, 1939.
Arrow/Ey Patented June zo, 193e PATENT OFFICE SHOE Heinrich Schrder, Budapest, llungary 4Application July 31, 1937, Serial No. 156,685
In Hungary August 3, 192
The invention relates to McKay shoes. These shoes include a top part comprising an insole and an upper lasted thereover, a bottom part comprising an outsole, and a fastening seam 5 which traverses all three elements to hold them together. There is not a separate seamI holding the upper to the insole, and another holding the insole to the outsole, but a single seam the stitiches, nails or staples of which pass through l all three elements. Such a shoe is of an elegant character and suitable for town wear. It has however certain disadvantages which it is the object of the invention to overcome without loss of the general elegant character of the shoe.
l 1. The opening of the seam which binds out-V sole, insole and. upper leather together has its origin in the fact that the seam is exposed to friction due to the constant movement of the seam during wearing of the shoe.
2. Each of the three superposed layers, namely, insole, upper leather and outsole during wearing of the shoe is bent to a different radius. The differences exert their eiect mainly at the toe end, because the outsole is bent to a greater radius than the insole and the difference amounts to from 1 to 3 mm. according to the wearers walk.
3. Further differences occur through the washing and rubbing out of the tanning and filling substances which ll the pores of the leather and preserve it, these differences occurring in the insole through the intermittent swelling thereof occasioned by foot moisture with subsequent drying. In the outsole similar action occurs through washing out of tanning and lling substances occasioned by wear in rain and through shrinkage during drying.V
'I'hrough the` above mentioned actions, the means binding the several layers of leather to- 40 gether are continually being moved in their positions and as a result loosen,l tear or break.
The object of the invention is to overcome.- these faults.
I. A layer of rubber is secured, for example by vulcanizing on, over the whole or part of'the inner surface ofthe outsole, the rubber layer being bevelled oi round the edge in such a way that it is not visible or at any rate not noticeable on the outside edge and leaves room for a dummy 5o Welt if such is required, the welt being formed so that when attached it is correctly aligned with the outsole.
1I. The dummy welt can be made externally as wide as desired, but inwardly must'only reach4 the margin of the upper leather so as not to interfere with attachment, described below, of the rubber layer to the upperk leather on the margin of the shoe.
III. 'I'he rubber layer with the Ioutsole Vulcanized thereto is secured to the upper leather by 5 the same method as used for attaching it to the outsole and afterwards secured by the fastening seam which holds the bottom part and the top part of the shoe together. No iilling apart from the rubber layer is provided. 10
' The accompanying drawing illustrates by way of example an embodiment ofMcKay sewnshoe according to the invention,.in diagrammatic cross section.
Figure 1 shows a shoe provided with a dummy l5 welt.
Figure 2 shows a similar construction to Figurevl but with the'several layers shown separated on the right hand side.
In the gures, a is the outsole, b the insole and Q0 c the upper leather. Between the outsole a and the insole b a layer d of rubber is arranged, which ls vulcanized to the outsole a and to the upper leather c. The margin of the rubber layer d is bevelled oi to a feather edge and the dummy 25 Welt f lies upon this margin, the welt externally completely covering the rubber layer and its edge aligning with the edge of the outsole. 'I'he insole b, the upper leather c, the rubber layer d and the outsole a are secured together bythe 30 stitches h, by nai-ls, or any other suitable means. and a separate seam g binds the dummy welt f and the outsole a.
By the vulcanization of the rubber layer d to the upper leather c the upper leather and the 35 sole Aare inseparably united, yet the two can move relatively at the mid part of the sole,` Where the insole b lies over the rubber layer.
The construction of the shoe can also be such that the rubber layer d is only arranged at inter- 4 vals between the outsole a and the insole b.
The advantages of the invention are:
1. That'the rubber layer forms a connecting layer betweeny the leather'outsole and the upper leather, which owing to its elasticity and extensi- 45 bility equalizes the movements and friction between the upper leather and outsole, and which encloses and protects the seam stitches and thereby increases their resistance so that opening of the seam'is prevented. 50
2. That through the vulcanizing of the rubber layer on to the leather outsole, the inner side of the sole is covered in airtight manner so that the pores of the sole cannot permit the passage of water which would wash out the tanning and 55 piece between the upper leather and the outsole also enables the iilling employed in shoes of conventional construction between the insole and outsole to be omitted because the rubber layer takes the place of the filling material, and the shoe is more iiexible than when illling is used.
5. 'I'he rubber layer forming a direct connection with the upper leather enables the full thickness of the leather outsole to be worn away without separating in the last stages from the upper leather so that the shoe can be worn longer without damage.
What I claim is: v
f In a McKay shoe including a top part comprising an insole and an upper lasted thereover, a bottom part comprising an outsole, and a fastening seam traversing ali three constituent elements, the 'combination of a rubber layer located between said top part and said bottom part and vulcanized to both and traversed by said fastening seam, said rubber layer having its margin projecting beyond the edge oi' said top part and bevelled oif so that its edge is substantially invisible from the outsidev of the shoe, a dummy welt upon the upper face of said projecting marl gin,V and an additional seam securing said dummy welt vto said margin.