US2359818A - Inner sole and method of making the same - Google Patents

Description

oct. 1o, 1944. F. L. AYERS 2,359,818

INNERSOIJE AND MTHOD OF MAKING THEl SAME l Filed Noy. 22, 1941 Patented Oct. 10, 1944 INNER SOLE AND METHOD OF MAKING THE SAME Fred L. Ayers, Watertown, Mass. Application November 22, 1941, Serial No. 420,074

2 Claims.

In my application for Patent-Serial Number 400,919, filed July 3, 1941, for Shoe and innersole therefor is disclosed the idea of applying a thin folded marginal strip to the outer face of an innersole blank, and applying thereto a reinforcing layer to the same face of the blank and to a portion of the folded layer, a margin of the reinforcing layer being in-turned with the portion of the folded strip secured thereto to form an inseam receiving rib.

The present invention in part relates to a modification of the foregoing method wherein the pre-folding of the marginal strip is not required, and wherein the strip may be applied after instead of before the application f the reinforcing layer.

Other objects and improvements will appear from a more complete description of the invention as illustrated in the drawing in which Figure 1 is a bottom plan view of a sole blank prepared in accordance with this invention.

Figure 2 is a detail section on line 22 of Figure l.

Figure 3 is a View similar to Figure 2, but showing the reinforcing layer applied.

Figure 4 is a view similar to Figure 3 but showing the margin of the reinforcing layer turned back andthe marginal strip applied.

Figures 5 and 6 are views similar to Figure 4, but showing modifications.

F'gures 'I and 8 are fragmentary perspective views of preferred forms of welt or locking strip.

Figure 9 is a fragmentary section through a sole edge portion of the shoe on the last and employing the welt or locking strip of Figure '7 in condition just after the inseam stitching.

Figure 10 is a view similar to Figure 9, but showing the outersole attached.

Figure l1 is a view somewhat similar to Figure 4, but showing a modified construction.

Figure 12 is a view similar to Figure 9, but embodying the modification of Figure 11.

Referring to the drawing, the innersole is shown as comprising a flat, relatively thin sole blank l having its margin, at least about the forepart, skived as at 2 to form a bevel 3 preferably terminating at its inner edge in a shoulder 4. This bevel portionmay extend also through the shank or even around the entire circumference of `the blank, depending upon the manner in which it is desired to last the shank and heel portion of the shoe. To the lower face 5 of this blank is secured a reinforcing layer 6 which extends outwardly beyond the innermargin of the bevel portion 3 to the desired extent. This reinforcing layer may well be of canvas or other suitable fabric, one face of which may be coated with a cement such as rubber cement, this cement being employed, if desired, to secure the reinforcing layer 6 to the sole blank I.

The marginal portion 1 of the reinforcing layer which extends outwardly of the shoulder 4 is then turned upwardly and inwardly as shown in Figures 4 and 5 or upwardly as shown in Figure 6 and a piece of strip material 8 which'may be of paper, fabric, or the like, is then secured to the beveled face 3, bridging across the juncture between the portion 1 of the reinforcing layer and the innersole blank margin and against the outer or upper face of the portion 1. This strip, which as shown is much thinner than the reinforcing layer 6 may be secured as by any suitable adhesive and preferably in order to closely engage the shoulder 4, it is pre-creased longitudinally so as to present the crease' line adjacent to the shoulder thus to lie in close engagement with the beveled face 3, the shoulder 4, and the margin 1. The margin 'l may be turned inwardly as shown in Figures 4 and 5'before the strip vis applied, or it may be merely turned upward as shown in Figure 6, in which case the strip is somewhat folded about its crease line when in position. Thereafter the portion 1, together with the marginal portion of the strip material secured thereto, may be bent inwardly as in Figures 4 and 5, if desired, in order to form a more convenient structure of inseam rib. The turning up or inwardly of the portion 'l may, if desired, be performed simultaneously with the application of the strip 8. 'I'his strip material may extend throughout substantially the full Width of the beveled portion as shown in Figure 4, or it may extend only a part of the Width thereof as shown in Figure 5. In any event, however, it serves to bridge across the end folded portion l and Ithe sole blank so as to prevent the possibility of the reinforcing layer and the sole blank being wedged apart in later shoemaking operations.

The portion 'l and the strip material may be stiffened, if desired, as by any of the well known liquid stifiening agents so that `the stitch-receiving rib will be better prepared to be engaged by the inseam fastener inserting mechanism, such, for example, as that of an inseam sewing machine; or of a stapling machine.

The innersole so prepared is temporarily secured to a last as shown in Figure 9, and the upper materials, such as the lining l0 and outer Il, are pulled over and secured by inseam fasteners to the rib comprising the portion 1 and the strip 8. Also a suitable welt or locking strip such as is shown, for example, in Figures 7 and 8, is secured at the same time by the inseam fasteners such as stitching I2. Figure 8 shows a welt or locking strip suitable for the purpose, this strip having a V slot I5 in its lower face to receive the outer portions of the inseam stitching, the stitching extending through the inner edge I6 of this welt or locking strip, through the upper materials, through the strip 8 and the portion 1 closely adjacent.to the fold line of the portion 1 with relation to the main body of the reinforcing layer 6. Preferably the inner edge I6 of the This arrangement will present a coated face of the portion 'la for engagement with the outer coated face of the reinforcing layer 6a so that these parts may be caused to adhere by merely pressing them into contact.

Figure 12 shows the arrangement of Figure 11 embodied in a shoe in the general condition of Figure 9, the portion 'Ia being temporarily lifted for the placing of the stitches.

After the inseam has been trimmed, an outersole 25 may be applied thereto and may be secured in position by any suitable means such as n cement, outsole stitching or both. This innersole strip is beveled backwardly from its top so that the top portion is pulled tight against the upper thus to prevent any possibility of a grinning seam. Thereafter the portion 1, with the part of the strip 8 secured thereto, is preferably bent downwardly and secured as by cement to the exposed face of the reinforcing layer 6, this providing an exceedingly secure bond for the inner portions of the stitching. The inseam is then trimmed and is preferably coated with a permanent cement capable of entering into the groove I5 for good engagement with the outer portion of the inseam stitches and between the various elements of the inseam, and preferably extending inwardly into engagement with the outer face of the portion 1.

With this construction a relatively thin welt or locking strip can be employed which of itself would be too weak to have a proper bond to the lasted shoe by means of the inseam stitching only, and preferably also the inseam stitching is composed of thread of a smaller size than that ordinarily employed in a welt shoe inseam in order that the stitch holes in the welt may be small, thus producing less weakening of the welt strip. Without the use of the cement this welt strip attachment would be too weak to be relied upon for the attachment of the outersole.

In case a very thin edge shoe is desired, a welt strip such as shown in Figure 7 may be employed having an inner thicker portion I1 and a thinned outer edge I8 formed by cutting out a portion of the thickness of the strip. The cut out portion then forms a channel or recess I9 within which the outer portions of the stitches lie freely accessible for application of the cement thereto. The inner edge of this strip is preferably beveled or inclined as described in connection with the strip of Figure 8 for the same purpose.

If desired the reinforcing layer for the inner sole blank may be a fabric pre-coated with cement on both faces, one face being secured against the sole blank as shown in Figure 11.

construction permits a close edge trimming of the vsole which would give insufficient room for out- -'sole stitching, if this should be found desirable in any particular case.

' The innersole construction presents a relatively flat smooth face for the attachment of the outer sole so that no filler between the inner and outer soles is necessary where this construction is employed.

From the foregoing description of certain embodiments of this invention, it should be evident to those skilled in the art that various changes and modifications might be made without departing from the spirit or scope of this invention.

I claim:

l. The method which comprises skiving about the margin of an innersole blank on its lower face about at least the forepart and with a shoulder on the inner margin of the skived portion, applying and securing to said lower face outwardly to said shoulder a reinforcing layer projecting beyond said shoulder, applying and securing to said skived portion and to the adjacent side of said layer a thin piece of strip material having a longitudinal crease line positioned adjacent to said shoulder, and folding inwardly the margin of said reinforcing material and the portion of said strip secured thereto to form an inseam receiving rib about the margin of at least the innersole forepart on its lower` face inwardly from its edge.

2. A shoe innersole comprising a at blank having its margin around at least the forepart beveled on one face, the inner edge of said bevel terminating in a shoulder, a reinforcing layer cementedto said face outwardly to said shoulder and free outwardly of said shoulder and having its free marginal portion inwardly turned, and a strip thinner than said layer cemented against the beveled portion of said blank and to the outer face of the inwardly turned portion of said layer,

, said strip having a longitudinal crease line positioned close to said shoulder.

FRED L. AYERS.

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