US 2292318 A
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Aug. 4, 1942. J. J. DALY 2,292,318
VENTILATED sHoE -soLE AND ART oF FABRIGATING INT0 SHOE sTRcTUREs Filed Sept. l1, 1940 ly. 6 j Snventor Joa/Z J Daly Gttornegs- Patented Aug. 4, 1942 VENTILATED SHOE SOLE AND ART OF FABRICATING INTO SHOE STRUCTURES John J. Daly, Hyannis, Mass., assignor to Daly Bros. Shoe Co. Inc., Boston, Mass., a corporation of Massachusetts Application September 11, 1940, Serial No. 356,337
This invention relates to certain improvements in air tread or ventilated sole shoes and particularly to improvements in their structure whereby certain economies in their manufacture may be effected and ldecrease in Weight made possible.
In the accompanying drawing:
Fig. 1 is a View of the upper surface of a sole for such a shoe, its upper structure being omitted for simplification.
Fig. 2 is a bottom View of an upper tread member before assembly.
Fig. 3 is a fragmentary longitudinally sectioned view of a shoe sole in process of construction, the bent toe section being indicated in dotted lines and the flattened t-oe in solid lines.
Fig. 4 shows a transverse section through a sole on the indicated line 4--4, of Fig. 1, and
Fig. 5 is a transverse section through a shoe made with such a sole.
Referring to the accompanying drawing by numerals, I indicates the bottom sole of the shoe, and 2 the upper. My shoes are made with a leather innersole 3 ribbed as at 4 and usually gemmed as at 5. The innersole 3 may be of light stock as it is reinforced by another leather sole member 3 which overlies the stitching 4' of the rib 4 and is cemented to its companion member 3 so as to form, in effect, a reinforced innersole unit perforated to provide the air passages or vents II. The rib 4 spaces the innersole unit upwardly from the bottom sole I. This rib is a fabric strip, which has had a. precoating of cement, and is stitched down its longitudinal center to the innersole member 3, the innersole member 3 overlying and -covering the stitching 4 as shown in Figs. 4 and 5. The strip is folded do-wnwardly on the line of Stitching 4' and the parallel downturned sections enclose an area over the outsole I in which is disposed my air tread ller member 6. This ller 6 preferably consists of spongelike resilient material the pores of which are filled with air. causes this material to expel air which passes up through the vents II to and around the foot itself, and as pressure shifts, fresh air is drawn down through these vents II beneath the fore part and arch of the foot.
To supplement the alternate compression and release of the filler 6 and to extend both the cornpression and ventilation features throughout the remainder Vof the arch region and into the heel region of the shoe, I provide the cushion tread member I2 which lies over the innersole unit 3, 3 in the area extending from substantially the The pressure of the foot metatarsal region of the shoe back to and including the heel.
This cushion tread member I2 is provided with alternate longitudinally extending grooves I2 and beads |22. Its lower surface is cemented to the upper surface of the innersole member 3, and
over its upper face is a perforated lining or cover T. When the beads I22 are compressed by .the wearers Weight, the air in the filler 6 is sucked away from the ball of the foot and redistributed, every step or movement of the foot in the shoe forcing old air out and drawing fresh air into the cells of the ller 6 and the grooves I2' of the cushion member l2.
Reference to Fig. 3 of the drawing will indicate that both the air tread resilient member 6 and the ventilated cushion member I2 extend throughout the arch region of the shoe, thus providing not only desirable reinforcement and cushioning in this delicate and readily tired area of the foot, but ralso ensuring a free passage of air throughout the shoe in this area.
Soles according to my invention can be lasted with suitable uppers. It is usually more convenient practice to insert the cushion tread member I2 after the shoe has had its outer sole I suitably fastened to the innersole and upper assembly, but it may be attached to the sole member 3--3 to make it a unit in handling.
One difficulty heretofore experienced in the use of an extra layer in shoe soles was that they tended to wrinkle or blister at the toe when being lasted.
According to my concept I deliberately make the end or tip of the inner portion 3 slightly shorter than its underlying member 3, as appears in the full lines in Fig. 3. My innersoe members 3' and 3 being initially uncemented I give them a deliberate bend cemented and set in a curved block having the upward curve or relief of the last to which the shoe sole is to be applied. This equalizes the relative or effective lengths of the innersole members 3 and 3 as indicated in Fig. 3 in dotted lines. In this ligure the difference in initial length appears in the portion shown in solid line, while their bent and cemented relation is indicated in dotted line. This bent form or curvature is that of the last to which it is to be applied in making the shoe so that the shoe may be fabricated with this critical toe area ready for anchoring. My soles are therefore preformed or pre-bent before lasting and before the upper 2 has been pulled-over and sewed through the substance of the rib or bead 4 which anchors the sole parts in their proper bent and stressed portion. This is effected Without wrinkling or blistering.
The cement coated rib is fabricated into the shoe structure as by stitching to a welt or like member which in turn is contoured to follow the outline of the shoe sole I. Such structure enables a shoe with its preformed innersole to hold shape even when stripped from the last in a comparatively green state. This enables the manufacturer to keep lasts turning over as frequently as possible to save the enormous expense of eXtra last equipment.
I am aware that two-part rubber inner members have been patented forair tread soles, but such molded members are apt to add undesirable Weight and complicate the processing of the shoes.
According to my improvement, Ventilation through the ball contacting area of the sole is primarily induced by the compression of the i spongy illing. 6 which delivers airdirect to the shoe interior under the alternate compression and relief of each completed step. The supplementary action of the internal tread is above the upper surface of theleather sole member at shank and heel Zones, through apertures 1 and 12 in the coverl communicating with thegrooves I22 of the member I 2.
While I utilize certain old features of the prior art, my invention combines them in novel relation both structurally and as an improved basis of factory production.
What I therefore claim and desire to secure by Letters Patent is:
A shoe comprising an upper, an outsole, an insole, a filler between said outsole and insole and extending from the fore part of the shoe a substantial distance rearwardly, and a multilayer cushioning unit overlying said insole and comprising a bottom layer, an intermediate layer and a top layer, said insole and said bottom layer being coextensive with the outsole and having registering perforations in the areas thereof which overlie said ller, said intermediate layer and said top layer extending from the heel of the shoe forwardly to a point where they overlap a portion of the ller, sai-d intermediate layer being of resilient material and having spaced longitudinal ribs on its top face contacting the lower face of said top layer and defining therewith longitudinal air passages, and. said top layer having perforations communicating with said passages.
J OHN J.' DALY.