USRE5089E - Improvement in heel-stiffeners - Google Patents

Description

D. E. HAYWARD.

Improvement in Heel-Stiffners.

No.5,089. I Reissued ocr.a,1s72.

4as pasteboard and factitious leather, when UNITED STATES PATENT OFFICE. y

DANIEL E; HAYWARD, OF MELROSE, ASSIGNOR, BY MESNE ASSIGNMENTS, TO WILLIAM F. SPINNEY, OF CHELSEA, AND CHARLES W. MELCHER, OF

LYNN, MASSACHUSETTS.

IMPROVEMENT I'N HEEL-STIFYFENERS.

Specification forming part of Letters Patent No. 40,409, dated O ctober 27, 1863; reissues Nos. 2,770 and 2,771, dated October 8, 1867; reissue No. 5,089, dated October 8, 1872.

To all lwhom it may concern Be it known that DANIEL EDWTN HAY- WARD, of Melrose, in the county of Middlesex and State of Massachusetts, has invent'- ed an Improved Heel-Stiffener or Counter for Boots and Shoes, of which the following is a full, clear, and eXact description, reference being had to the accompanying drawing making part of this specification, in which- Figure l is a view of the improved heelstiff'ener, and Fig. Z5 is a view of the piece of sheet rubber of which it is made.

Heel-stiii'eners or counters have heretofore been made of leather, but the labor required to cut them outand skive them is considerable. The chief obj ection, however, to which they are liable, arises from the time and labor required to apply them to the boot or shoe. After being cut out and skived they are temporarily secured to the last and lining, and then bent round and crimped or formed over upon the in sole and secured there. This must be done when the stiffener or counter is damp and pliable. The leather stiffener is also liable to the objection that it will lose its resiliency if bent out of shape when wet, and will not return to its original form, and then the boot or shoe wears to one side. which have been employed for stiii'eners, such made by hand, as above described, are of little value as compared with a stift'ener which can be molded and shaped to its desired 'form at one operation, as by the invention hereinafter described. y

We are aware that heel-stiffeners have been made of sheet-rubber which has been cut, folded, crimped, an d cemented over the sole while in the course oi construction. This is expensive, and vwe lay no claim to any such stitener.

In the manufacture of the improved stiffener we employ any suitable compound of India rubber, which, when vulcanized, will have the required stii'ness combined with the Vnecessary resiliency. The compound, after being ground upon the ordinary heated rolls, is spread in a sheet of 'from one-eighth to one-tenth ofan inch in thickness upon cotton or other cloth, the thickness of the sheet and of the cloth varying with the size of the required stift'ener.

The cheaper substitutes for leather Pieces, Fig. 2, are then out from the sheet of cloth and rubber of the required size, which are placed in a mold and vulcanized, the cloth being thrown upon the inside of the stift'ener and the. mold being of the form that shall give it the required shape, Fig. 1, the part f which goes beneath the heel being of the exact form ultimately required, so that when applied to i the boot or shoe it is simply necessary to put it in place, no wetting, crimping, bending, or temporary nailing being required. When the upper leather and sole are applied the stitches, nails, or pegs that hold them together also pass through the part f of the stift'euer in the ordinary manner. I

This stiffener is also permanently resilient, even when wet, and does not lose its form or shape, however long or severe the wear to which itis exposed. This stiiiener may be placed outside the leather, if preferred.

The proportions which we preferfor the compound to be employed in the manufacture of the improved counter are as follows: Eight pounds crude 1ubber; two pounds litharge; one pound white lead 5 one pound lampblack; four-pounds calcined plaster; six ounces iiowers sulphur. v

This compound, after being thoroughly ground upon the ordinary heated rolls and placed. in the molds is vulcanized by exposure for ten hours or thereabout to a temperature of 2750 Fahrenheit. We do not, however, Wish to coniine ourselves toa-n y particular compound or to any particular length of time or degree of heat for vulcanizing the same.

What we claim as the invention ofthe said HAYWARD, and desire to secure by Letters Eatent, is-

1. As a new article of manufacture, a heelstiener or counter which is shaped by the mold in which it is formed, substantially as' described.

2. Also, the art or process of making heel-

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