US2064681A

US2064681A - Shoemaking

Info

Publication number: US2064681A
Application number: US38206A
Authority: US
Inventors: William H Nickerson
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-08-28
Filing date: 1935-08-28
Publication date: 1936-12-15
Anticipated expiration: 1953-12-15

Description

Dec. 15, 1936. w H MCKERSQN 2,064,681

SHOEMAKING Filed Aug. 28, 1935 2 Sheets-Sheet l Dec. 15, 1936. WfH. NICKERSON,

SHOEMAKING Filed Aug. 28, 1955 2 Sheets-Sheet 2 5 a Am M,

Patented Dec. 15, 1936 UNITED STATES ENT OFFICE 6 Claims.

This invention relates to the shoe making art and is concerned principally with means for stiffening the shank part of the shoe and securing the upper to the innersole. It comprises a novel combination between a metal shank stiffener and a fiber heel slip, and the further combinations of these combined elements with the innersole and upper of a shoe. concerned with shoes of the type in which a piece of hard fiber board or equivalent stiff non-metallic material of outline and dimensions conforming approximately to the heel end and shank part of theinnersole is applied to those parts of the innersole over the shank and beneath edges of the lasted upper. Such pieces are designated heel slips in the shoe making art, and will be so called in this specification. Inasmuch as they are usually made of hard and dense fiber board, it may be assumed that the heel slip described in the following specification is of that material; although this assumption is not to be construed asexcluding from the scope of the invention as herein claimed the use of other materials having qualities of stiffness, flexibility and penetrability by. metallic fasteners suitable for the purposes in view.

The particulars of the invention are illustrated by drawings, in which .Figure 1 is a perspective view of a heel slip and shank stiffener, in which one phase of the invention is embodied, dismembered from one another.

Figure 2 is a perspective View of the heel slip and shank stiffener combined in accordance with one embodiment of the invention.

: Figure 3 is a similar view of an equivalent combination containing a variantiorm of shank stiffener.

Figure 4 is a perspective view of the heel slip and shank stifiener combination of Figure 2 in further combination with the innersole prior to application to a last.

Figures 5 and 6 are fragmentary perspective views showing a variant form of heel slip in combination with the shank stifieners of Figures 2 and. 3, respectively.

Figures 7, 8, and 9 are, respectively, a longitudinal section, a bottom plan view and a fragmentary cross section on line 9--9 of Figure '7, of a lasted shoe containing the combination of Figure 4 and further combined with a shoe upper.

Figures 1-0, 11, and 12 are views similar to Figs. 7, 8 and 9, respectively, showing for comparison a shoe in which the shank stiffener is on the outer side of the heel slip.

In particular the invention is Like reference characters designate the same parts wherever they may occur in all the figures.

In the combination shown dismembered in Figure 1 and assembled in Figure 2, a tempered steel shank stiffener it having integral prongs U adjacent to its ends is combined with a heel slip c and made fast thereto by staples d. The shank stiffener is curved or bowed longitudinally conforming to the shank curvature of shoes of the style and sizes for which it is provided, and it is also arched transversely to enhance its stiffness. The heel slip may be assumed to be a piece of fiber board of similar, and approximately equal,

dimensions and outline to the heel end and adjacent shank portion of the innersole designed for such shoes; but its length is somewhat less than the distance from the heel end of the innersole to the designed location of the point where the forward prongs of the shank stiffener are to be driven into the innersole.

Such heel slip and shank stiffener are assembled apart from the shoe and with the forward end of the stiffener protruding beyond the forward end of the heel slip in such position that the forward prongs are clear of the heel slip and Will be located at the proper point on the innersole when the combination is applied to the innersole with the rear end of the heel slip slightly forward of the heel end of the innersole. The back of the stifiener, that is, the side opposite that from which the prongs extend, is placed against the surface of the heel slip. Two or more staples crossing and closely embracing the stiffener are driven into the heel slip and clinched on its opposite face. They are properly spaced and positioned, and driven tightly enough to hold the stifiener in the prescribed position relative to the heel slip and substantially immovable in that position, so that neither is liable to be displaced with respect to the other before being applied to the innersole. The heel slip is also given a longitudinally arched formation conforming to the shank stiffener, which increases the security with which these parts are prevented from slipping longitudinally with respect to one another.

As so constituted the combination embodies a stiffened heel slip with prongs projecting from the stiffener side thereof adapted to be driven into an innersole, and with the location of the forward prongs plainly exposed to- View when the combination is applied to an innersole in the manner represented in Figure 4. Both the outward projection of the shank stiffener prongs and the exposure of its forward prongs are important features of the invention because they enable the combined article to be applied to an innersole apart from the last and show the operator directly and accurately where he must strike in order to embed and clinch the forward prongs in the innersole. This union with the innersole may be effected on a metallic form or base, preferably one which has contours similar to those of the shoe making last so that the innersole is shaped to the curvature of the shank stiffener while being connected.

Such connection is effected by two blows of a hammer in the hands of the workman While the innersole is supported on such a form or equivalent support. The prongs are thereby embedded and clinched before the innersole is applied to the bottom of the shoe making last. This capacity of the stiffener and heel slip combination avoids the necessity of using a shoe making last with a metallic bottom or metallic inset at the forward end of the shank part, and is, to the best of my knowledge and belief, entirely novel with this invention.

Figure 3 shows an equivalent combination in which the means for connection with the innersole are tack shanks 6 passed through holes in the stiffener instead of being integral prongs. However, these tacks are functionally equivalent to the prongs b and are intended to be comprised within the meaning of the term prongs as used in the claims.

The combinations shown in Figures 5 and 6 differ from those of Figures-2 and 3, respectively, in that the heel slip in each case is longer and its forward termination is approximately flush with the forward end of the stiffener. But the central part of its forward end is out out to provide a notch f substantially as deep as the distance from the forward end of the stiffener to the adjacent prong or prongs, whereby the desired exposure of these prongs to the view of the operator is obtained.

The heel slip is transversely curved or bowed as to the part which overlies the stiffener to the extent which brings the edges of this part against the adjacent face of the innersole while the latter remains substantially fiat transversely. This transverse bending may be done either when the stiffener and heel slip are first assembled or when they are assembled with the innersole.

Frequently the heel slip is secured to the innersole by cement (by which term I include any suitable adhesive) in addition to the connection made by the stiffener prongs. In some makes of shoes the upper is cemented to the outer face of the heel slip. The fiber board of which these heel slips are usually made is not readily penetrable by the adhesives used for these purposes but rather tends to repel them. A further feature of the invention consists in means for making a stronger bond between the cement, when used in these situations, and the heel slip. Such means comprises grooves or other indentations and/or ridges or projections in either face or both faces of the heel slip. For example, the face which comes next to the innersole may be scored with cuts similar to those by which metal files are made, or shallow grooves, as shown at g in Figure 1. Preferably such score lines extend longitudinally or diagonally of the heel slip rather than squarely across its width, in order not to diminish the stiffness of the heel slip in the longitudinal direction. Where the score lines are arranged diagonally, they may be provided in two series crossing one another.

The opposite side is provided with separated projections h somewhat like the teeth of a wood rasp. Either mode of roughening the surface provides spaces in which cement may lodge and take hold with a stronger bond than occurs with the unmodified smooth surfaces of this material. It is to be understood that either of the foregoing means for roughening the surface may be applied to either or both surfaces of the heel slip, and that specifically different equivalent means may also be used for the same purpose.

When an innersole in which the stiffener and heel combination has been applied is placed on the bottom of the last, the shoe upper may be pulled over the heel slip and secured to the outer surface thereof by mechanical fastenings or adhesive, without regard to the presence of the shank stiffener. That is, the heel slip, overlying the stiffener affords a continuous surface over which the upper may be pulled at the shank of the shoe and its edges secured without regard to the presence of the stiffener. It is not necessary to trim such edges in order to accommodate the heel stiffener, as is necessary when the stiffener is placed outside the heel slip, as is the case in shoes of the type shown by Figures 10, 11, and 12.

In the completed shoe the shank stiffener furnished pursuant to this invention is securely anchored in place by its direct connections with the innersole and with the heel slip, and the heel slip is anchored by its stapled connection with the shank stiffener and its cemented or tacked connection with the innersole and the upper.

What I claim and desire to secure by Letters Patent is:

1. In the art of shoe making the step which consists in applying to the outer side of an innersole a composite heel slip and shank stiffener secured together and having prongs protruding from the stiffener away from the heel slip, and embedding and clinching such prongs in the substance of such innersole.

2. In the art of shoe making the step which consists in applying to the outer side of an innersole a composite heel slip and shank stiffener secured together, with prongs protruding from the stiffener away from the heel slip, embedding and clinching such prongs in the substance of such innersole apart from the last on which the shoe is made, and subsequently applying to the bottom of such last the innersole with the shank stiffener and heel slip attached.

3. A heel slip and shank stiffener combination including staples securing the shank stiffener to the heel slip substantially on the longitudinal median line of the heel slip, the stiffener having prongs adjacent to its opposite ends projecting away from the heel slip, the prong or prongs at the forward end of the stiffener being uncovered by the material of the heel slip.

4. An innersole, shank stiffener and heel slip combination in which the shank stiffener is between the innersole and heel slip and has prongs adjacent to its opposite ends embedded and clinched in the substance of the innersole, and including staples passing through the heel slip and embracing the shank stiffener.

5. An innersole, shank stiffener and heel slip combination in which the shank stiffener is between the innersole and heel slip and has prongs adjacent to its oppiosite ends embedded and clinched in the substance of the inner sole, and including staples passing through the heel slip and embracing the shank stiffener, the heel slip being scored or roughened on one or both faces to provide anchorage means for adhesive.

6. An innersole, shank stiffener and heel slip combination in which the shank stifiener is between the innersole and heel slip and has prongs adjacent to its opposite ends embedded and clinched in the substance of the innersole, and including staples passing through the heel slip and embracing the shank stiffener, the heel slip being scored on its surface next to the innersole and being anchored to the innersole by adhesive in bonded connection with such scored surface.

WILLIAM H. NICKERSON.