US1537082A

US1537082A - Method of making spring-heel shoe soles

Info

Publication number: US1537082A
Application number: US651733A
Authority: US
Inventors: Sell Julius F G
Original assignee: International Shoe Co
Current assignee: International Shoe Co
Priority date: 1923-07-16
Filing date: 1923-07-16
Publication date: 1925-05-12
Anticipated expiration: 1942-05-12

Description

May 12, 1925. 1,537,082

- J. F. GSELL METHOD OF MAKING SPRING HEEL SHOE SOLES I Filed July 16. 1925 2 Sheets-Sheet 1 7 f 1H-l- J. F. GSELL METHOD OF MAKING SPRING HEEL SHOE SOLES 2 Sheets-Sheet 2 Filed July 16, 1923 Hill" l H llllflill \IIINIIH \llllllii um Y Patented May 12, 1925.

UNITED STATES PATENT erres.

Jones I. GSELL, OFVJERSEYVILLE, ILLINoIsQAssIen'on T INTERNATIONAL siren COMPANY, orsr. LOUIS, MIssouRI, A oonronarron' or DELAWARE.

METHOD OF MAKING SPRING-HEEL SHOE SOLE-S.

Application filed July 16,

To all whom it may cmwcrm Be it known that I, JULrUs F. GSnnn' a citizen of the UnitedStates, residing at Jerseyville, Jersey County, State of Illinois, have invented a new and useful Method of hfttliilig' Spring-Heel Shoe Soles, of which the following is a specification.

This invention relates to a method of niakingspring heel shoe soles, and consists in' the novel method of procedure for practicing the'method hereinafter disclosed.

The present practice in the manufacture ofspring heel soles consists in forming a flat sole blank separately in a press so as to provide an upwardly deflected line across the sole at the forward portion of the heel section. The heel lift, consisting of a flat section with a beveled edge, is then cemented thereto by applying cement to the face of the heel section of the sole and to the under face of the lift, allowing the cement to partially dry until it reaches the tacky state andthen pressing the two parts together by hand. This practice requires considerable labor as difficulty is. experiencedin properly centering the lift on the heel section. Dilliculty is also experienced in this practice in securing the bevel frontedge of the heel lift to the face of the inclined line formed in the sole, it usually being necessary to tack the beveled edge in place.

The object of the present invention is to overcome the expensiveoperations now employed in making spring heel soles, to re-' duce the expense thereof, and to form a more uniform shoe sole wherein the beveled edge of the heellift is securely adhered to the inclined line at the forward portion of the heel section. 1

These purposes, as well as other advantapes, are accomplished in the manner here inafter more fully disclosed by the use of the apparatus illustrated in the accompany ing drawings in Wl1lCl1 Fig. 1 is a top plan view of the apparatus.

2 is a side elevation thereof. 3 is a bottom plan view of the top section of the mold.

Fig. 4c is a top plan view'of the bottom section of the mold. v Figfo is a vertical; section through the same. v Fig. 6 is a cross section taken on the line 6i-6of Fig 1,

1923. Serial No. 651,733.

" Fig. 7 is a cross section taken on the line ,r of Fig. 1. l Fig. 8 is a top plan view of the shoe sole with" the heel lift applied thereto.

this bottom section of the mold thereare formed two cavities extending inwardly from each end of the mold. The inner 1)O1?-r tion of each of these 'cavities'is formed with a flat wall 2' for supportingthe upper face of the heel lift when the shoe sole is inserted therein in inverted position. The side walls 3 of the inner ends of the cavities conform generally to the curvature of the edges of theheel. section of the soles and the heel lifts applied thereto. These side walls have a downwardlyextending section 4. in the plane with the plane of the inclined wall forn'iing the line at the forward portion of the heel section of the sole. The front portion of each of the cavities is formed with an arch section 5 to support and form the concave portion of the shoe sole'forward of the forward end of the heelv lift. I Atthe side edges ofthe arch section of the cavity are walls 6 that are substantially on a plane with the-forward edge of the walls f: and also substantially on a plane with the .top of the arched portion 5 of the cavity.

Intern'iediate of the inner edges of the cavities formed in the base section is a transverse channel 7 at the center of which is formed a cylindrical opening 8. On the bottom wall of the base section and surrounding-the opening of the cavity 8 is a. retaining plate 9 held in place by suitabl retainingmeans such as wood screws i Seated in the cavity formed by the open ing 8 is a post comprising; a circular base section 11 to which is connected a stud 12 preferably rectangular in cross section. The

stud has ratchet teeth formed on one edge and the post is positioned in the cavity formed by the opening'S in such a manner that the base section thereof seats on the upper wall of the retaining plate 9, the stud 12 extending vertically above the upper plane of the base of the mold with ratchet teeth facing outwardly toward one side edge of the mold. A retaining plate 13 having an opening 14 therein is secured in position in the channel 7, with the stud 12 projecting through said opening 1-1. A cotter pin 1st may be mounted in an opening in the stud above the plate 13 for retaining the post in position when the plate 9 is removed. An expansion spring 15 is mounted in the cavity 8 and bears against the base section 11 of the post at one end and against the under face of the retaining plate 13 at the other end, so as to resiliently support the post in position in the cavity. The post constitutes one element of a latch device for holding the two mold sections together.

Dowel pins 16 project upwardly from the base section of the mold for centering the upper section thereof when the same is placed in position.

The upper section of the mold has its under face formed to conform in general contour with the bottom of the shoe sole with the heel lift applied thereto, there being provided a flat wall 17 and a flat wall 18 fitting over the heel area of the shoe sole and

inclined sections

19 and 20 arranged to form the downwardly deflected line forward of the heel section of the sole, and the

concave portions

21 and 22 forming the arched portion of the sole. Intermediate of the

walls

17 and 18 is a centrally disposed opening 23 into which the upper end of the post extends. There is also formedin the upper section of the mold dowel pin openings 2% that cooperate with the dowel pins 16 in centering the two sections of the mold.

A latch bolt housing 25 is secured to the inner face of the upper mold section adjacent to the opening 23, and a latch bolt 26 is mounted in said housing in such a manner that it projects across the opening 23, said latch bolt having its projecting edge formed with ratchet teeth adapted to cooperate with the ratchet teeth of the'post to latch the two mold sections together. The latch bolt is provided with apush rod 27, said push rod extending outwardly beyond the edge of the mold section. A spring 28 attached at one end to. the push rod and at the opposite end to the wall of the mold section normally tends to move the latch bolt inwardly into engagementwith the stud of the post. To release the latch pressure is exerted on the push rod 27, unlocking the latch device.

The method of making the spring heel soles by the use of the apparatus described consists in inserting the heel lifts in reverse position in each end of the bottom mold section, applying over the area thereof a quantity of glue, it being observed that glue may be employed instead of cement thus effecting a substantial saving in manufacturing cost. If preferred, the glue may be applied to the inner face of the heel lift before the same is inserted in the mold cavity. A flat sole is then placed in each of the cavities of the bottom mold section in such a way that the heel section is centered upon the heel lift. The top mold section is then centered upon the base section of the mold and pressed downwardly, being retained in position by the latch device. A plurality of the molds are arranged in this way and are positioned in a press and pressure applied to the mold. The pressure results in clamping the mold sections tightly together, forming the completed shoe sole and adhering the heel lift uniformly throughout its entire area including a tight connection along the beveled edge of the heel lift with the contiguous area of the heel section of the shoe.

As the mold constitutes a complete template for centering the heel lifts and the soles uniformity in the completed product is obtained. The process may be carried out with a great saving in labor. The line section and the arch section of the sole may be formed uniformly and the contiguous surfaces of the heel lift and heel section of the sole are closely united throughout their entire area, thus obviating curling of the edges of the beveled section of the heel lift and making it unnecessary to nail the beveled section of the heel lift to the line on the shoe sole.

I am aware that the invention may be modified in certain particulars without departure from the spirit and scope thereof. I do not limit myself unessentia-lly, but what I claim and desire to secure by Letters Patent is 1. The method of making spring heel soles, which consists in shaping a flat heel blank to provide a heel lift receiving portion, and simultaneously bonding a lift to said lift receiving portion.

2. The method of making spring heel soles, which consists in shaping a flat heel blank to provide an upwardly inclined wall forward of the heel sect-ion, and simultaneously bonding a lift to said heel port-ion and said inclined wall in one operation.

3. The method of making spring heel soles, which consists in placing a heel lift in a mold, adjusting a sole blank in juxtaposition thereto, there being an adhesive element between :the matching faces of the sole and lift, and applying pressure uniformly throughout the area of the lift portion and the heel portion of the sole.

4:. The-method .of making spring heel soles, which consists in placing in a mold a spring heel lift in connection with a flat lllf) sole blank, applying glue to the contiguous surfaces of tie lift and heel portions of the sole, and placing the mold under pressure to form the sole and to bond the lift to the heel portion thereof.

19 heel lift having a glue surface on the face thereof, placing a shoe sole blank on said lift,

and clamping the parts in position and then applying pressure uniformly to the heel area of the sole effectively to bond the lift 15 to the sole and to shape the sole.

' "6. The method of making spring heel soles which conslsts in superimposing the heel portion of a sole blank upon a heel lift,

and then simultaneously shaping said heel portion to conform to the heel lift, and bonding the two together.

7. The method of making spring heel soles which consists in applying pressure to a heel lift and the contacting portion of a sole having a bonding substance between them, whereby the sole is shaped to the heel lift and the two are bonded together simultaneously.

JULIUS F. GSELL.