US2083376A - Shoe sole - Google Patents

Description

June 8, 1937. E. c. HILHECKER SHOE SOLE Filed March 14, 1935 2 Sheets-Sheet l INVENTOR. @are /ezeaa/ l ATTORNEYS.

Patented June 8, 1937 PATENT oFFici-zv SHOE SOLE Eugene C. Heilhecker, Bristol, R. I., assignor to Maurice C. Smith, Jr., Bristol, R. I.

Application March 14,

13 Claims.

This invention relates to a shoe and has for one'of its objects the provision of a shoe sole of such form that it may be cemented to the upper of the shoe without pulling away from the upper of the shoe. A

Another object of the invention is the provision of a shoe sole which will so fit the foot and shoe upper that no tendency exists to pull the sole away from its upper when in cemented position.-

Another object of the invention is the provision of an elastically resilient vulcanized rubber solev which, when cemented to the upper, will have no inherent tendency due to movement of its parts tending to cause the sole to pull away from the upper that is cemented thereto.

Another object of the invention is the provision of a moulding device by which the shoe sole and a, fabric upper surface may be secured thereto with the fabric surface in a desired centered position with reference to the shoe sole.

A further object of the invention is thevprovision of a device for securely holding a fabric to be attached to the upper surface of the outsole securely in position to be vulcanized to the outsole. A still further object of the invention is the' secure holding of the fabric in position'in the mould with easy attachment and release of this fabric from such position. a With these and other objects in view, the invention consists of certain novel features of construction, as Will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings: I

Fig. 1 is aperspective view of a cemented sole shoe which sole is formed in accordance with this i invention.

Fig. 2 is "a perspective view of the sole before being attached to the upper.

Fig. 3 is a sectional view on line 3-3 of Fig. 1.

Fig. 4is a sectional view' on line 4 4 of Fig. 2.

Fig. 5 is a perspective view of one part of the mould for the sole.

Fig. 6 is a perspective view of another part of the mould.

Fig. '7 is a sectional view through the mould with a sole in position therein, a sole also being shown in section.

Fig. 8 is a side elevation of the clamping rin for securing the .fabric in position.

Fig. 9 is a top plan View thereof.

Fig. 10 is a perspective view of. this ring.

Fig. 11 is a sectional view through the mould substantially on line II-II of Fig. '7.

una. 12 is a section on une iz-iz o: Fis. 9.

1933, 'serial No. 660.632

(ci. :3s-32) Fig. 13 is a fragmental sectional view of the i sole with the fabric surface folded over after being removed from the mould, showing modified arrangement of the fabric in the further operations after coming from the mould.

In the formation of shoes in which the sole is sewed to the upper there is a suicient bond of attachment due to the stitching to maintain the sole in a slightly curved position from which it may tend to straighten out due to its inherent resilience. In cementing the sole of a shoe, if the sole is caused to take such curvature, it continually tends to straighten out and pull away from the cement bond, and in order that this may be avoided in a vulcanized rubber sole having a material amount of resiliency or pulling away qualities I have. moulded and vulcanized this rubber sole in a shape such that its upper surface substantially conforms to the shape and curvature of the bottom of the foot and also to the bottom of the lasted upper to which it is cemented, by which=arrangement there is no exing of the sole from its natural position of 4 curvature, and thus no tendency for the sole to pull away from its upper when cemented. I have found in my moulding a shoe sole with a fabric upper surface that frequently the fabric is positioned at one side or the otherof the desired central position and to prevent this I utilize a fabric of a size larger than that desired in the 'finished shoe, and use this excess of material as a means for holding the same in desired position by clamping it with a telescoping member in the desired position in\ the mould, which clamp may be easily released after vulcanization has taken place and the excess fabric removed or turned in to form a part of the shoe as desired, and the following is a detailed description of the present embodiment of this invention illustrating the preferred means and method by which the sole may be formed.

With reference to the drawings, I0 designates a shoe upper to which a sole designated generally II is attached by'cementing, this sole II is shaped in a mould consisting of two parts, I2 and I3 by positioning a certain desired quantity of rubber or rubber composition in the recess surface of the material, will become impregnated on one side with the material which is inA a plastic or semi-plastic state, if not previously impregnated by frictioning, on one side only, and when such ma'ss is formed and the material squeezed into the shape desired I will then vulcanize the rubber or plastic composition that it may maintain this shape as its natural shape when coming from the mould.

The sole which I have'thus formed is of one integral piece of material from which the fabric covering I8 cannot be readily detached. 'I'his fabric covering may be frictioned on one side only, which frictioned side is secured by vulcanization to the sole, thus leaving the other side of the fabric or fibrous covering layer free from rubber and providing a surface which is more adaptable to receive the cement. I may use pyroxylin cement for securing the fibrous surface of the sole to a like fibrous surface on the bottom of an insole in a manner as disclosed in my Patent No. 1,901,782, of which I am one of the joint inventors. In some cases either one or,`

both of these fibrous surfaces may be buied or roughed to better receive the cement where desired. There is a heel I9, a shank portion 20, a ball portion 2| about all'of which there may or may not be provided a feathered edge 22 as desired with impressed indentations to indicate stitching. The fabric material I6 in instances where the feathered edge 22 is provided will not extend out to the feather edge as this is the portion which protrudes beyond the upper of the shoe and is not cemented to the upper.

The upper surface of the soie formed in this manner is of a varying curvature and may be best described by stating that it conforms substantially to the curvature of the bottom of the foot. The inner edge 23 of the shank portion is higher than its corresponding opposite outer edge 24 which characteristic causes the sole to better support the arch of the foot and is new in soles of this character. From this high point 23 there is a gradual slope rearwardly as at 26 and a more abrupt sloping forwardly as at 26, while the opposite outer edge of the shank, which is slightly higher than any point along this cor` responding edge, remains almost level with the edge 21 of the heel and gradually slopes downward as at 28 although not on as steep a slant as along'the edge 26. f

By this manner of formation a sole is provided of varying thicknesses throughout its extent'. The heel willbe relatively heavy and provide acushion as is'usual in rubber heels ofl this character. There willv be an abrupt line of demarcation as' of 30 adjacent the feathenand this point of demarcation provides a gradual -slant inwardly, therefrom over the surface of which the fabric is secured.

In order that the fabric I3 may be' positioned atthe desired point on the upper surface of the sole I provide a specially constructed mould. This mould will have a casing or frame portion 3 3 in the center of which there is secured by bolt 42 the shaping portion 34 for the upper' surface having a surface 35 forl engagement with the.

fabric. Over this surface 35 the fabric I3 is positioned which is held in place by a peripheral clamping member 36 telescoping over the same and fitting closely about the periphery of the central portion 34 and holding the edges 3`| of the fabric between. this clamping member and the shaping portion 34. This clamping member also closely fits within the casing 33 engaging the inner surface 38 thereof so as to firmly bind the fabric in position and prevent it from laterally or longitudinally shifting its position in the mould.4 The inner surface 45 of the clamp is beveled to cooperate with the inner bevel surface 46 of the shaping portion so that as the clamp is moved toward setting position against the inner surface of the casing 33, the fabric will be tightly stretched across"the ,surface of the portion 34 and prevent any foldsv or"wri'nkles occurring therein.

The lower portion of the mould consists of a casing or frame 39 having a shaping insert 40 secured therein by a bolt or screw 4| similar to the-bolt or screw 42 in the other portion of the die, which insert 40 cooperates with the portions 34 and 36 of the upper half of the die that the material or sole may be formed in its desired shape. The two casing portions 33 and 39 are forced together and'any excess rubber which is placed within the mould willlbe squeezed therefrom outwardly through openings or recesses 43 between the casing portions until finally the cooperating moulding portions will contact and compress the full content of the mould into the desired position.

The sole, after acquiring the desired shape, is

.vulcanized and then taken lfrom the mould, the

, excess portion may be removed by cutting the fabric oiI as illustrated in Figures 1 and i or it may be turned over as illustrated at 44 in Fig. 13, and vthe edges buffed. The sole so formed in either way is then cemented to the insole 3| of a shoe and the turned in edges 32 of the upper in any usual or convenient manner.

The foregoing description is directed solely towards the construction illustrated, .but I desire it to be understoodthat I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and hunted only by the terms of the appended claims.

I claim: l f

1. An unattached solid sole, mold-generated -both as to material andform, having its upper edge materially higher on its inner side at the shank portion than on its outer side, and a curvature of its bottom generally along its central longitudinal line such that .its contours tend materially upward from the ball region of the sole, the sole having substantially uniform thickness along said line from a point adjacent the shank forward to the toe region thereof.

2. A vulcanized solid unattached rubber sole having its upper edge materially higher on the innerside at the shank than at the outer side and having a curvature `generally along its central longitudinal line such that its contours tend materially upward from the ballregion of the sole, the sole having substantially uniform thickness along said line from a point adjacent the shank forward to the toe region thereof. e

3. Aniunattached solid sole, mold-generated both as to material and form, having one edge thereof higher than the correspondingopposite edge, the sole having a material curvature along the generally central longitudinal line thereof from the ball region forwardly thereof and being of a substantially uniform thickness along said line fro'm a point adjacent the shank forward to' the toe region thereof.

'than on the outer side 'thereof and 'which has a material curvature along its generally central 4. An unattached sole, mold-generated as to material and form, having one edge ofthe shank both as to material and form, of uneven thickness transversely thereof throughout its extent and having itsupper edge substantially higher on the inside of theshank than -on the outer side thereof and having a longitudinal curvature generally along its central longitudinal line such that its contours tend materially upwardly from the ball region of the sole, the sole being of substantially uniform thickness along said line from a point adjacent the shank forward to the toe region thereof.

6. An unattached vulcanized rubber sole of uneven thickness transversely -thereof throughout its extent and having its upper edge substantially'higher at the inner side 'of the shank than at the outer side thereof, the sole having a substantial curvatureA along its generally cenresponding opposite edge of the shank and provided with a feather edge extending beyondthe attaching area.

9. An unattached vulcanized solid rubber sole thickness transversely thereof throughout its extent and havingl its upper edge substantially higher on the inner side of the shank than on the outer side thereof, the sole having a material longitudinal curvature along' its generally central line from the ball region of the sole forwardlythereof and having a feather edge extending beyond the attaching area of the sole.

10. A shoe having a sole whose upper edge is substantially higher on the inside of the shank line beginning at the ball region of the sole and extending forwardly thereof, said sole being substantially of uniform thickness along said line from a point adjacent the shank forward to the toe region thereof, a fabric piece having a strong bond with said sole, an inner sole cemented to said fabric except around the edges thereof, and a shoe upper having its lower edgeconforming to the curvature of said soleand cemented between the edges of said fabric and said inner sole.

11. A shoe having a rubber molded sole whose- -of said fabric and said inner sole.

12. An unattached vulcanized-solid rubber sole having a fabric piece secured to its upper surface and adapted for use in attaching the sole 'to an. upper, the sole having a materially higher upper edge is substantially higher on the inside edge on the inner side of the shank than on the f outer, andhaving a material curvature along its generally central line from the-ball 4region of the sole forwardly thereof, and being of vsub-v stantially uniform thickness along said line from 13. A shoe having a solid sole, mold-generated L both as to material and form, whose upper edge is materially higher at the inner side of the shank than at the outer side thereof and which has a material curvature from the ball area of the sole forwardly thereof, said sole being of substantially uniform thickness along its generally central line from a point adjacent the shank forward to the toe region thereof, a fabric piece having a strong bond with said sole, an inner sole cemented to said fabric except around the edges thereof, and a shoe 'upper having its lower edge conforming vto the curvature of said sole and cemented between the edges of said fabric

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