US1900316A - Method of filling shoes - Google Patents

Description

March 7, 1933. A. THOMA METHOD OF FILLING SHOES Filed Jan. 6, 1928 Patented Mar. 7, 1933 PATENT OFFICE nnnnnw TI-IOMA, or CAMBRIDGE, MASSACHUSETTS, ASSIGNOR T Non'rnnMEnIoAN CHE-REGAL COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSA- crrusnrrs METHOD OF FILLING SHOES Application filed January 6, 1928.: Serial No. 245,001.

In the use of certain kinds of filler in the shoe bottom there has been found to be a tendency for the same to mold in the shoebottom in damp weather or under certain temperature and humid conditions. Such filler is set forth in my method application Ser. No. 210,558 and article application Ser. No. 211,157. The present method aims to render this unfortunate result impossible. To this end I may provide substantially the same filler ingredients as set forth in the aforesaid applications, the principal difference being that I eliminate or expel the volatile constituents from within the porous body material at some time before the filler gets into the shoe-bottom. To this end I preferably mix the comminuted body material with an enveloping gelatinous paste or other crust forming medium so as thoroughly to. coat each granule or particle of the body material with a thin film thereof, and then by heat or other means of evaporation I drive off all the evaporable constituent from said coating and also from within the body material granule in case any of the volatile element should have penetrated thereinto. In, other words I thus maintain the dry granular condition,

" against the molding, or so as to accomplish but coated and protected by an impervious film or skin like a acket or armor. This removes the element which has heretofore caused the molding above mentioned.

In my previous Patent No. 1,032,312, dated July 9, 1912, I combined pasty ingredients with wax tailings and the like as a binder but not so as to form a skin and provide any of the results of the presentinvention. In the disclosure of said patent there was'no impervious skin, no barrier in the sense of the present invention, the cork was .not maintained with its original light weight,and a subsequent coo-king process was necessary for developing the paste, besldes many other radical differences which it'is unnecessaryhere to polnt out.

l/Vith my filler as first above explained I when the filling operator is ready to fill his shoe bottom he releases or softens this crusted coating by heat, moisture, steam or whatever quickenmg process the particular klnd of ly illustrated my method,

'tioned copending applications.

encrusting coating may be sufiicient in amount and character to'constitute the binder itself orpreferably it simply holds the filler particles protected as stated but still discreet, and in such case the binder-is mainly separate in the form of wax tailings or other waxy or sticky material of'well known character.

' In the drawing, in which I have graphical- Fig. v1 is a conventional view broken away or sectioned of a mixer; and

Fig. 2v is a cross sectional enlarged detail of a chunk-like piece of filler constructed for carrying out my method.

. It will be understood that the filler may be of any of the usual plastic varieties, many of which are disclosed in my filler patents and also in my copending filler applications. I

It is suflicient to refer to the above two men- The com-. minuted filler material, as for instance ground cork, is thrown into a mixer 1 with a quantity of preferably thick gelatinous, jelly-like coating material such as apparatine, gelatin, glue, paste, or any pasty materials like starch, dextrine, flour, magnesia compounds, shellac, or the longv list of resinous substances, and thoroughly" agitated or mixed preferably in the. presence of heat.

The objectisto thoroughly coat each particle of the body material with asthin but complete a coating skin as possible while at the same time driving off by means of the heat and the agitation all volatile penetrative substances present, thereby leaving the body material thoroughly coated with an impervious covering and in as light weight a condition as possible. Then this mass of body material composed of the individually coated,

relatively discreet granules or particles, is thoroughly mlxed wlth any suitable binder, as for example melted wax tailings, or any other of the large variety of binders. The Y binder material ispoured into the mass, in the mixer 1 and thoroughly mixed, It is unnecessaryto explain this step any farther as it is substantially the same as has heretofore been long practiced in making fillers. Of course it a binder is used which does not require heat, the mixer is not heated. The mixer is first heated as first above explainerh simply to hasten the evaporation of the volatile portion of the coating element as well to drive out the moisture, it any,- trom withinthe particles and leave them completely armored or protected with a shin. By impervious I mean that it will not adi. i penetration or absorption of the external cinder ele ment whatever it may be in the particular filler. In the mixer in Fig. 1 l have indicated at 2 the mass of particles being 1r ed and in Fig. 2 I show the corlr or other coinminuted body elements 3 coated with a protector & and, in case said protector is not itself a binder or is considered insufiicient, a separate or additional binder =5 is employed.

The result is that theiiller material-has no tendency to mold or deteriorate as an article of manufacture, but is read and maintained in proper condition, at all times by this process. JV hen the shoe is to b tilled the operator quickens the filler by such suitable means as is called for by the particular combination of elements present. For instance it the binder be wax tailings and the coating is a varnish or covering of resin or other resinous material the quickening agency is simply heat. On the other hand if the coating" is an encrusting of apparatine, for example, the filler is subjected to steam. This is maintained just sufiiciently to soften the mass of filler and render it spreadable, whereupon. it is at once spread in the shoe-bottom. In case the covering material is disrupted by pressure or in any other way and removed from its protecting relation to the body particles, and in case the latter are absorbent, the result then is that a portion of the binder material is at once absorbed thereby. For instance if the binder material be war: tailings, an appreciable portion oi said wax tail'ngs are sucked in or absorbed by the ground cork so as to stiffen the laid filler as soon as the wax tailings have served their function of rendering the filler spreadable. The result is that the laid filler now becomes relatively and yet permanently resilient which two results are essential in an ideal filler layer.

What I claim and desire to s cure by Letters Patent is Themethod of making spreadable shoe bottom filler which comprises coating the individual particles of coinmin' Lbrous, absorbent body material with a fluid paste made of a suitable film-forming substance and an 'evaporable liquid, then drying; the coated articles and driving of? Whatever e'vaporable liquid may be present both in the coating and in the coated particles, leaving each particle enclosed by a dry, protective film adapted to prevent penetration and absorption by the particles of external binder and of external moisture, and adapted to be disrupted in use, and then mixing the dry film-coated particles With a sticky binder to form a homogeneous filler composition.

Signed by me at Cambrids'e, Mass. this fifth day of January 1928.

ANDRE /V THOMA.

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