US1638136A - Shank stiffener - Google Patents

Description

Patented Aug. 9, 1927.

Unirse STATES kstuurman n. IBARTELS, or LYNN, MASSACHUSETTS.

, sHANx s'rIFFVENER.

Application filed September' 8, 1920. Serial :,Np. 408,800.l

are usually made or thin dat strips ot metal,

as duct-ile iron or steel, and are designed to be iastened to the lat blank which has been ormay afterwards be tempered by soaking it in water and then .shaped or molded into the torni desired. In molding the sole niember, the stiiiener is also given 'afdefinite shape to hold the member in the desired torni.

Heretotore thek stiil'ener has been secured to the sole member by means o'ktines or prongs struck out ot' the body ot Athe metal and turned at right angles thereto. The tines are designed to be driven through the leather of the sole member, and, it the sole membei is sutliciently thin, to clinch on the upper tace thereof. ln suoli case, the bentover tines orm hard points on the upper side of the sole 'which are objectionable to the purchaser or wearer ot the shoe. ln case the tines do not pierce entirely through the leather and clinch, the stiilener is likely to pull loose therefrom when the sole is shaped into torni as stated above. Another objection to metallic stiffeners, as at present used,

is that they are provided with no effective protection against corrosion, and consequently compounds are formed by the combination of the tannic acid of the leather or of moisture with the metal of the stitfener, which discolor the leather about the stii'lener and impair the commercial value of the shoe.

The present invention contemplates remedying the above objections by providing a shank stitener in which the tines are struck up at an angle of less than 90 to the plane of the body portion so that the tines will 'not pierce entirely through the leather, and,` by .arranging the tines in pa'rs inclined toward each other whereby the tines grip the leather between them, irmly securing the stitfener to the sole. A single tine, set at an angle of less than 90o would tend to iiatten and not penetrate the leather, so that, as stated7 it is important that the tines be arranged in pairs and be closely adjacent. The formation of the discoloring compounds, as set forth above, is prevented by coating the stiliener with a suitable waterproof varnish which prevents corroding influences from coming into contact with the metal.

Aspecific;embodiment 'ofthe invention is disclosed .on :the accompanying drawings, tormingajpart of the present application, in which f f -K Figure lshows a planl view of the stitlener attached to the shoe. i n y Figure 2 is a plan view of the stitfener lone. c Jl y Figure v3 shows `aI-stiffener'placed on an outersoleandready to be attached the-reto.

Figure 4l shows-the stiifener attached to the sole. f

Figure 5- is la view- .similarto Figure 2, but showing a modification.y

Referring to the drawings yby reference numerals, 'the `same numerals designa-ting the samel parts throughoutvthe drawings,- 10l designates sole, which I have selected merely for 'the purpose of illustrating a sole member, and 11 a shank stitfener attached thereto. The 'shank stitlener (see Figures 2 and 3) has formed adjacent its ends and within its margin pairs of closely adjacentA tines orprongs 12 and 13, preferably struck from the body of the metal. The tines ot each pair are preferably in alinementwith each other longitudinally ot the stiilener and are inclined toward each other and at an angle ot' less than .90 tok the body of the stiiener. Preferably also, when this can be done, both tines of -a pair are so cut and struck from the material as to leave but a lsingle hole therethrough, as shown in Figures 1, 2 and 3, the material struck therefrom being divided transversely substantially centrally to form the free ends of the tines. By bending .the tines at less than 90O to the plane of the body portion the metal is less weakened at the bends than if they were bent through a larger angle. Formed in -this manner, when the stifl'ener is in position on the sole as shown in Figure 3, the tines are driven into the leather of the sole at angles to the surface thereof, the ends of the tines clinching within the body of the sole and gripping a portion ot' the leather thereof between them. Thus the tines do not penetrate entirely through the leather and give the shoe a damaged appearance, or allord an opportunity for discoloration adjacent the points, even though the stiffener is not japanned or varnished.

It will appear from the above description that the tines, if desired, may be placed on the stiifener in transverse alinement thereon and that therel may be any number ofy C 10 parts, shellac 25 parts, alcohol 15 parts,

and turpentine 45 parts.

What I claim is y 1. A shank stifiener comprising a blank of thin sheet metal having a hole formed by the striking of material therefrom adjacent to one end, the material so struck being transversely divided to form a pair of oppositely positioned prongs projecting` from one face thereof and inclined toward each i' other.

2. A shank stiffener comprising a blank of thin sheet metal having prongs struck therefrom Within its margin in oppositely disposed alined pairs, the prongs of each being closely adjacent to and inclined toward each other.

3. A shank stiffener comprising a blank of thin sheet metal having prongs .struck therefromat less than'QOo and arranged in opposed pairs, the prongs of each pair being inclined toward each other. Y

4. The combination with a shoe sole of a shank st'iii'ener secured thereto by means of prongs projecting from the stiii'ener, said prongs being arranged in adjacent alined pairs struck from Vthe material of the stiffener Within its margin and gripping Va portion of the sole between them, said prongs being clinched toward each other Within the body of said sole.

5. The combination with a shoe sole, of a shank stiffener secured thereto'by means of prongs projecting from said stiifener, saidV vprongs being struck from the material of said stilfener less than 90o and inclined toward each other in opposed pairs gripping a portion of said sole therebetween and clinched Within the body of said sole. j

In testimony whereof I' have afliXed my signature.

REINHARD E. BARTELS.

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