US1393787A - Sole and method of making - Google Patents

Description

M. E. JOHNSON. SOLE AND METHOD OF MAKlNG. APPLICATION FILED DEC. 2, I920- 1,393,787. Patented Oct. 18, 1921..

UNITED STATES PATENT OFFICE.

MERTON E. JOHNSON, OF BEVERLY, -MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

SOLE AND METHOD OF MAKING.

Patented Oct. 18, 1921.

Original application filed October 18, 1919, Serial No. 331,580. Divided and this application filed Decemher 2, 1920. Serial No. 427,738.

enable others skilled in the art to which it appertains to make and use the same.

This invention relates to soles and the method of making them and more particularly to insoles of the peaked toe type in the fitting of which it is found desirable to remove a portion of the lip at the tip of the toe to enable said lip to be raised for the inseam sewing operation.

The invention herein described and claimed is divided out of the inventors application Serial No. 331,580, filed October 18, 1919, which describes and claims a machine for making the novel sole.

Peaked toe insoles have heretofore been provided with a V-shaped notch in the lip material at the tip of the toe and a lineal slit in the flap material just at the rear of the notch, by means of an insole snipping machine such as is disclosed in Letters Patent of the United States to John B. Hadaway, No. 1,087,578, dated February 17 1914:. In using sole blanks, fitted by the Hadaway machine for Economy insoles, the slits in lip and flap are directly opposite each other when the lip and flap are raised and secured together to form the sewing-rib, resulting in a-weakened sewing rib at the tip of the toe.

One object of the present invention is to overcome the disadvantage referred to, and to devise a method of making soles which, although fitted in the general manner suggested by Hadaway, will nevertheless be provided with a strong sewing-rib through out its length.

A. further object of the invention is to provide a fitting of the character described for peaked toe soles which will properly, although. not unduly, enlarge the confined channel flap space at the toe so as to give opportunity for an easier movement of'the channel guide of the welt and turn sewing machine during the inseaming operation.

To the accomplishment of these objects the invention comprises a sole having the features and characteristics hereinafter described, and the method of making it, as particularly pointed out in the appended claims.

The accompanying drawings illustrate the preferred fitting to be used, in which Figure 1 shows a sole blank as incised by the machine of said parent application for Economy insoles; Figs. 2 and 3 show the result of channeling the blank of Fig. 1; Fig. 4; is a cross-section on the line et-l' of Fig. 1; Fig. 5 is a longitudinal section on the line 55 of Fig. 8; Fig. 6 is a cross-section showing the incised and channeled toe end of the sole after the lip setting operation; and Fig. 7 is'a perspective of the forepart of an Economy insole, partly broken away, illustrating the sole shown in Fig. 3 after the lip-setting operation.

In the embodiment of the invention illustrated in the drawings the sole blank is fitted at the toe with two incisions 8 and 10, the former extending through the lip material and the latter through the flap material. A third incision 12 extending through the flap material at the outside ball may be made if the style of the shoe makes it requisite. The incisions at the toe may be made in a machine such as that disclosed in the parent application Serial No. 331,580, in which the incision 8 is formed by a V-shaped knife and the incision 10 is formed by a straight bladed knife, the sole being so positioned for receiving the cuts that the V-shaped incision is centrallyof the tip of the toe and the lineal incision is made obliquely across the median line of the sole, all as illustrated in Fig. 1. The incision 19., when used, is made by a second operation of the straight bladed knife, the position of the sole being so changed as to receive the cut in the desired location.

Referring now to Figs. 1 and 2, a sole blank having at the toe end the V-shaped incision 8 and the oblique lineal incision 10 at the rear thereof, is taken to anyv commercial channeling machine for the next operation. If an Economy insole is to be produced from the blank, it is channeled by an edge slitting knife 14: and a channel forming knife 16 in the usual way. During the channeling operation the lip knife 14 passes horizontally through the incision 8 which produces a notch 18 in the lip at the tip of the toe (see Fig. 3). Also during the channeling the channel knife 1.6 passes horizontally through the incision 10 and reaches the position shown in Fig. 2 before the sole is swung to channel the other side. As a result, after the channeling at the toe is completed'the channel flap is provided with two transverse slits 20 and 22 Fig. 3) formed, respectively, by the straight bladed incising knife and the channel knife 16. A triangular. tongue 24 at the apex of the channel cuts is formed between these two slits. The reason and necessity for an oblique cut by the straight bladed knife will now be apparent. Since the channel flap slit 22 is formed by an extension of the channel cut on one side of the sole the slit 20 should be similarly located to produce the tongue 24, hence it must lie in the line of the channel cut on the other side of the sole, or obliquely across the median line of the sole. Now then, when the lip and flap are raised and set in contact (see Fig. 7) the tongue 24 is so located as to overlie the slit 26 (dotted line Fig. 6), formed by the meeting edges of the notch 81 and thus strengthen the sewing-rib where it would otherwise be weak. Instead of a single central V-shaped notch in the upturned channel flap as is produced by the machine of said Hadaway patent, the channel flap now has two such notches 28 on either side of the center, formed by the spreading of the slits 20 and 22, with the lip strengthening tongue between them. The advantages accruing from this construction in obtaining a strong, tight inseam about the toe will readily be apparent to those skilled in the art.

No ris the advantage of the two channel flap slits 20 and 22 limited to the production of Economy insoles. In all peaked toe soles much difficulty is experienced at inseaming in forcing the channel guide of the welt or turn sewing machine through the confined space at the apex of the channel.

The transverse channel flap slits 20 and 22 provide a more elastic channel flap at this point, permitting it to lift freely as the sole is swung and afiord sufiicient space for the passage of the channel guide. It will be recognized then that an oblique slit 10, as made by the straight bladed knife alone, is important and of considerable value in sewing soles which have no lip which needs strengthening such as turn soles or welt insoles for womens work.

Those skilled in the art will recognize that even in welt insoles where the peripheral curve at the toe is such as to render the use of the V-shaped lip incision 8 unnecessary, still the V. formed at the apex of the channel cuts may be so narrow as to render the oblique incision 10 highly desirable,

since by the use of such an incision the binding of the channel guide at inseaming is relieved.

Having thus described the invention and the preferred method of practising it, the invention is stated in its true scope in the following claims.

WVhat is claimed as new, is:

1. A sole having a .V-shaped incision in its margin at the tip of the toe, and a lineal incision at the rear thereof but oblique thereto.

2. A sole having a V-shaped incision in its margin at the tip-of the toe arranged symmetrically with respect to the median line of the sole, and a lineal incision at the rear thereof but lying across said median line.

3. A sole having a channel flap which is slit transversely at each side of the toe end thereof, said slits forming a continuation of the channel cut on the opposite side, producing a free tongue at the apex formed by the channel cuts.

4. A sole having a lip provided with a V- shaped notch at the tip of the toe, and a channel flap having a free tongue at the apex of the channel cuts.

5. A sole having a lip and channel flap raised and set in contact with each other, said lip having a vertical slit at the tip of the toe, and said flap having V-shaped notches at each side of said slit and an inverted V-shaped tongue between them.

6. An unchanneled sole blank having a lineal incision extending in the direction of the proposed channel cut at one side of the sole and cutting through the channel flap material at the other side of the sole.

7 The method of making soles which comprises incising a sole blank at the toe by an oblique cut extending in the direction of the channel cut on the last side of the sole to be channeled, channeling through said incision to a point transversely opposite the forward end thereof, and then swinging the sole and completing the channel cut.

8. The method of making soles which comprises producing a free tongue in the channel flap at the apex of the channel cuts by the combination of an oblique incision in the sole blank and a channel out which passes through one end of saidincision. 9. The method of making soles which comprises producing a lip notched at the tip of the toe, producing a channel fiap'having contact, and employing said free tongue to reinforce the slit formed by the meeting edges of said lip notch.

MERTON E. JOHNSON.

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