US939330A

US939330A - Apparatus for applying rubber soles to boots and shoes.

Info

Publication number: US939330A
Application number: US35163407A
Authority: US
Inventors: Emmett A Saunders
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-01-10
Filing date: 1907-01-10
Publication date: 1909-11-09
Anticipated expiration: 1926-11-09

Description

E. A. SAUNDERS. 1 APPARATUS FOR APPLYING RUBBER SOLES '110 BOOTS AND SHOES.

' APPLICATION rum) JAIL 10, 1907.

939,330. I Patented Nov. 9, 1909.

mam: FEISM M LWML. mam-man u c.

mama A. em nate- SOUTH BEND, INDIANA; Y"

a nrranATUs-ron APPLYING mag-mm: Belt k njown thatI, EMMETT A'. SAUN- nnns, a citizen of the United States,-residing South Bend, State of Indiana, have invented a certain new and ,usefulImprovelmentm Apparatus for Applying Rubber Soles to Boots and Shoes, of whiclithe fol-" lowing is; a specification.

e o O Invent on has. relation to an imlggQVedafQF-Iil. of apparatuswhereby rubber titom's may be applied by vulcanization The'improved apparatus herein claimed shown'and described in'my pending applithough itis suitable. for applying rubber soles, timing and heels to shoes mad of other than rubber,- as r for instance canvas shoes. To the extent 'of the-disclosures inmy said pending applicationthis is a continuation thereof.

{My im roved apparatus in one preferred orm is s own in the accompanying drawtng wherein-- t Figure 1 is a cross section of the mold with a shoe in it andFigQ is a perspective view ofthe combined sole, foxing and heel which may be vulcanized on to a shoe by dire form of my invention.

In usin my improved mold andpress. for makingrubber. footiwear I prefer to proceedfas follows: The body ofthe shcfe, in-

cluding the inner sole as shown at 1 in ii 1, is built up'i'n tneus'ua-l ananner on first 2, being constructed of properly shaped cemented together temporarily.- The thick outer rubber sole 3 is separately prepared, being either formed green or partly vulcanized in a press in. a well" known manner. The sole shown in Fig. 2 is a typical example of this part'as prepared for application to the shoe. It is concave in transverse section to fit theconvexity of the shoe body, and is preferably provided with an n turned edge 4, which is adapted to fit closel all around the lower edge of the shoe ody. The'forin" of sole' illustrated is not essential to my invention thescope of which covers the use and application of a mere tap sole or of a heel alone; The shoe bodyand the thick lower part to be applied:

having been thus separately prethereto $pe eif cat'ion of Letters Patent. Appllcptibhfiled Jenni-5 10,1907. Serial No. 351,634. a

fder pressure to Shoes. and boots of all nuianrn seL s 'ro. Booms Anti SEIOES.

, ,Pateii ted Nev. 9, 1909.

pared, the latter is placedin a mold 5 into which'it fits snugly, which mold is combined with means for a pressing the shoe body, whilestill on the lastydown onto 'the sole in said mold. In the illustrative form of apparatus shownjin' the drawin s, this takes the shape'of an arch 6 fitted Wltll'tt screw 7' having a hand wheel 8; The last with the shoe body upon it is placed upon the'sol'e 3 so as to-fit within the upturned edge -l y andthe screw 7 is turned down hard upon it. The action of the convex body when thus forced down into thecoi'icavesole when in the mold 5 is to create a pressure between the soft meeting surfaces atall points, and

thus the sole is pressed upon the shoe body, not only on the under surface, but horizontally along the entire length'of the upturned edges 4. These upturned edges 4, being thus subjected to pressure where the-edges of the lower part of the" mold approach very close to the body ltfof the shoe, form a fox ing which isvulcan'ized'in place under pressure as follows: In order to carry out my process, the mold must be heated to a proper vulcanizing temperature and this may be accomplished in any manner desired. In the apparatus shown in the drawing the mold 5 is hollow as shown and the'heat is sup- -plied by steam entering for instance at 9 and returning at 10. By the means above described there is created a strong continuous pressure which is preserved during the period of vulcanization of the lower shoe body and joined surfaces, or until this proce'ss has been carried so far that the material is able of itsown resistance tolsuppress. all

formation of sponginess under the further influence of heat. When the heating under pressure has been thus carried on for a sufficient time to produce the desired degree of vulcanization the shoe isremoved from the mold and is complete at this stage, if the uppers are of other substance than rubber, as for instance canvas. \Vhere the uppers are made of green rubber, as above described, howeverya'ffurther vulcanization without pressure is necessary, as-described in my pending'appliication aforesaid.

When the sole i'sfformed onto the shoe in a mold under great pressure, theinner sole,

filling-sole, lapping portion of the vamp, outer sole, (made plastic by the heat,) and the foxing are all compressed and vulcanized together into. practically one solid piece handsomely finished and making it practically impossiblefor the parts to separate or become detached one from the other.

Among the essential features of my device are the following: first, that means are provided for forming a heel, sole, and foxing portion complete all in one piece in a mold: second, that the-said mold is formed in only one piece, and therefore the expense of manufacturing the same is greatly reduced; third, more particularly in the making of rubber shoes these heels, soles, and foxing may be molded and partially vulcanized separate and independent of the upper and the whole then completely vulcanized in the usual way by placing them in an oven without the use of pressure. This method of molding and semi-vulcanizing the sole, heel, and foxing separately from the upper has itsspecial and important advantages over the old way of making the shoe Whollyby hand, one advantage being that the shoe when completed has a perfect shape and a finished appearance the same as a wholly-molded shoe. Then, again, by molding the heel, sole, and foxing into one piece it is naturally much stronger, and as the greatest wearing strain comes on this portion of the shoe the wearing life of the whole shoe is greatly increased. Again, varnish applied to a rubber shoe that is subsequently vulcanized withoutbeing molded will keep its luster much longer than when the shoe is formed in a mold, as by this method the varnish is baked into the shoe and cannot be easily removed.

The above is a most simple, practical, inexpensive, and eflicient manner of applying rubber soles to canvas shoes or the like, as the vulcanizing may be accomplished by the use of a last, mold, and steam-chest and the pressure applied by any ordinary screwpress, if desired. The expense of manufacturing is greatly facilitated over the ordinarily complicated and expensive means heretofore employed.

Having thus described my invention, what I claim asnew, and desire to secure by Letters Patent, isi 1. In a device of the character described, a mold adapted to form the heel, sole and foxing portion of a shoe from rubber or other plastic material, means for applying heat to said moldfor vulcanizing its contents, means for applying pressure to said mold while vulcanizing, and means for causing resistance to the plastic material so the same will be forced into the pores ofi the upper.

2. In ai-device of the character described, a mold adapted to form the heel, sole "and foxing portion only of a shoe, a last adapted to fit into said mold and assist in the formation of said heel, sole and foxing portion therein, said mold being so formed as to closely engage the foXing-line of said last to cause a resistance and prevent the free flowing of the material therefrom, and means for applying heat and pressure to the material.

3. In a device of the character described, a mold adapted to form the heel, sole and foxing portion of a shoe, a last over which a shoe may be formed the same being adapted to fit the mold and assist in the formation of the heel, sole and foxing therein, means for applying heat and pressure to the material, and means in said last and mold for causing resistance to the plastic material so that the same will be formed into the pores of the upper.

4. In a device of the character described, a mold adapted to form the heel, sole and foxing portion of a shoe, a last over which a shoe may be formed the same being adapted to fitthe mold and assist in the formation of the heel, sole and foxing therein, said mold being so formed as to closely fit the upper on the last at the foxing-line thereof to cause a resistance and insure the plastic material being formed into the pores of the upper, and means for applying heat and pressure to the material.

5. In a device of the character described, a mold adapted to form the heel, sole and foxing portion of a shoefrom rubber or other plastic material, means for applyingheat tosaid mold for vulcanizing its contents, a last or'forln to assist in the forina- 1 tion of the heel, sole and foxing portion, means for'applying pressure to said mold while vulcanizing, and means engaging the foXing-line to better retain the material while under pressure.

EMMETT A. SAUNDERS. lVitnesses;

H. S. MAQKAYE, M. STEVEN.