US1114819A - Shoe-bottom filler and method of making. - Google Patents

Description

. (:nabridge. in the county of Middlesex and ture in the form set forth in my application the trade as pontianak, or other gums such 'granular body, which is adhesive, cohesive, and elastic, does not require a solvent such barren s'rnrnsrnfrr. N1 ormon.

ANDREW THOMA, 0F CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO NORTH AMERICAN CHEMICAL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF MAINE.

Specification of Application filed March 7,

No Drawing.

Letters Patent.

Patented Oct.

Serial No. 361,171.

To all whom it may concern:

lie it known that I, ANDREW Tnonm, a ('lllZtIl of the United States, and resident of State of hlassachusetts, have invented an Improvement in Shoe-Bottom Fillers and Methods of Making, of which the following description is a specification.

My invention is a shoe filler for the bottom cavities of shoes, being one of the varieties or species of shoe bottom filler referred to in my foundation Patent No. 882,002 of September 25, 1006, and capable of manufac- '1 Serial No. 324,368 (now patent No. 945,294, Jan. 4, 1910). 1

One aim of my present invention is to make it practical from an economic standpoint to use vegetable gums, and another object is to do away with the necessity of dry heat in its use, or at least of such heat as I have preferred to employ in connection with the apparatus disclosed in my Patent No. 808,224. Accordingly, to these ends, I subject a vegetable gum such as is known to as almeidina, tuna, chicle, and lowengrade gutta-percha, although these are somewhat more expensive, to a rendering process in a steam-jacketed kettle under the disintegrating influence of free-flowingmineral oil and liquid creosote and resins (the presence of the oils and the fact that a steam-jacketed kettle is used, serving to maintain and insure a low, steady heat), and when the process is wholly completed and the mass is cooled, a very strong, stretchable, rubberlike mass results, having the characteristics of being readily adhesive, tenacious, flexible, Waterproof, and cementitious. The disintegration of the gum by the fluxing components mentioned must be entire, and I lay emphasis on this point, as therein resides one of the important discoveries or essentials of my invention. By this means I obtain the qualities of the better class of rubber, and at the same time avoid the neces sity of-the usual naphtha solutionwhich has been considered necessary for making rubber cement. I obtain a cementitious sub stance, to be combined with the desired as naphtha, is much cheaper than rubber and much better, as it retains its quality of,

cohesion and is therefore a permanently excellent, non-volatile binder for the ,qranuinto a uniform mass, the motion or friction of the rolls serving to sufiiciently soften the cementltious materlal or binding agent to facilitate the mixing operation without thee use of artificial heat applied either to the binder or to the rolls. This is a great ad vantage over the preferable process of mixing set forth in my Patent No. 832,002,

where the materials have to be maintained hot and fluid. The cold mixing process of my present inventionserves to retain in the material the natural strength and tenacity of the binding agent. To take advantage of this feature to the fullest. extent, I prefer not to subject the base o'l' vegetable gum to a severe heat. in the rendering process.

mentioned. but only to a partial heat rendering process, and then to complete the thorough mixing: andsmoothing of the gum in the mills so as not to destroy the natural strength and tough character of the gums, as would he the case if solely the heat melting" method were employed. \Vhen these gums are boiled over a high heat, their natural strength and tissue are destroyed and they are rendered veryliuid and are practically oonvertml into resins or. resinous substances having little or no elasticity. This enables me to secure a filler material of greater tenacity and miliesirencss than would be possible by subjecting the same ingredicuts to a fluxing and mixing method by heat alone.

I wish it understood that in stating my preferred process or method of manufacture above. I do not limit myself thereto. \Vhile it is preferable to employ the heat rendering together with the cold milling, a very satisfactory product may be made solely by the heat rendering: process, and likewise solely by the cold milling or smoothing mixing processof the rubber mills.

. A great variety of means. Miti: for r.

temple ascogum', (i. c. a sticky. roagndatcd mil) and the long list of recognized cquivacuts mentioned. For example, 50 pounds of lents on the market. may be employed to the proper consistency for-direct applicarender the gums in question sticky and tion to the shoe bottoms by simply being pasty so that they may be treated by the placed in a steam bath, such for instance as action of mills and admixed with the granumay be provided by an apparatus similar to lar matter'which preferably enters into the composition of shoe filler. In order that my invention may be more definitely apprehended, I will mention a few preferable formulzc or relative proportions of the ingrediand perforated so as to permit the steam and moist vapor to percolate and penetrate through the filler mass, helping quickly to soften and disintegrate the same, and there by place it in condition to be handled and to be quickly molded into the bottoms of the shoes. The hot moisture, although unable to disturb the binding'agent of the mass, helps to soften the same and to separate the material into a workable condition so that it may be handled quickly, not stick to the heated tools, and have a non-resisting, readily 'moldable and workable character, and nevertheless be quick-setting, permanently tenacious, elastic, and unchangeable in the sense set forth in my first mentioned shoe filler patent.

pontianak, Opounds rosin or resinous pitch, 3 gallons of limpid (i. 6. mobile or free flowing) mineral oil, and three quarters of a gallon of liquid creosote produce good re 5 'sults, slightly more of the mineral oil, say one half gallon additional, being used where the heat treatment alone is resorted to; or 50 pounds'pontianak, 30 pounds rosin, and 25 pounds medium 2'. 6. very low-melting (e. g. gravity from 4: to'5 Twaddell atlSO F.) wax tailings or petroleum residuum. hen the milling and mixing is to be done on the mills alone, therosin and fluxing oil, 71. e. the mineral oil and creosote in the one case, are first flux'ed together by heat before they are added to the gum on the mills, the mixing with the gum taking place on the mills in the same manner as now practised with rubber compounds in regular rubber manufac- 3o ture.

I have found that the influence of mineral oil in the foregoing compounds is preferable to common vegetable oils, the latter having a peculiar destructive influence upon the gum when-fluxed by heat; but whenever the milling process alone is resorted to, vegetable oils, excepting for their higher cost,

may be used to advantage in a boiled-semisolid state. So likewise may chemically a0 treated oils of the same sticky, semi-solid nature. Thus good results are'secured by mixing 40 pounds of rosinand 2 gallons of mobile or free-flowing mineral oil (which have previously beenfluxed together under heat) with pounds of pontianak gum and 8 pounds of thick semi-solid boiled or treated vegetable oil. There are numerous artificial sticky pastes made from oils either by themselves or by their combination with 50 gums or resins, well known in the rubber trade and on the market, which may be added to the vegetable gum in question, within the spirit and scope of my invention. The compound is milled into a sticky paste and mixed by the milling process with the preponderating amount of granulated scribed filler compound, consisting of fluxcork or the like until it is reduced to the ing together oil and resin, and then combinrelative stiffness and consistency required" ing therewith, by friction milling, at least for the shoe filler product as set forth in my in part, a gummy base having a rubber-like beforementioned Patent No. 832,002. character until said base is wholly disinte- One of the advantages resulting from my grated and the whole is reduced to a rubpresent invention is that the filler loaf or ber-like mass, and then thoroughly intercake (5.0. supposing that the product is put mixing with said mass a prepbnderating up in that shape as set forth in my beforeamount of comminuted filler material.

mentioned patent) can be readily reduced to 1 5. The method of'making the herein deas the same forms the subject matter of a divisonal application, Serial No. 689,395, filed April 8, 1912.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The method of making a filler compound, consisting of combining a vegetable gum of the character of the socalled rubber-like and pseudo-rubber gums having the general properties herein set forth with a sticky, pasty, fluxing agent through the agency, at least'partially, of friction milling under pressure.

2. The method of making the herein described filler compound, consisting of fluxa sticky, pasty fiuxing agent, and combining a vegetable gum having the general properties of being rubber-like, and capable of developing a stretchable quality through the agency, at least partially, of friction milling under pressure.

3. The method of making the herein deing together oil and resin, and then comleast in part, a gummy base having a rubber-like character until said base is wholly disintegrated and the whole is reduced to a rubber-like mass.

4. The method of making the herein dea glue pot, but having the inner pot shallow The method of use is not herein claimed,

ing together mineral oil and resin to make scribed filler compound, consisting of fluxbining therewith, by friction milling, at

scribed filler compound, consisting of disintegrating a base containing a resinous vegetable gum, by the agency, at least in part, of heat in the presence of mineral oil, and subjecting the compound to friction milling until thoroughly mixed.

6. The method of making the herein desta'ibed tiller, consisting of fluxing together mine al oil and resin, then combining therewith a rubbery vegetable gum until the latter is wholly disintegrated and reduced to a rubber-like mass, and then introducing granular filler material by friction milling.

'7. The method of making the herein described filler compound, consisting of combining a. resinous vegetable gum of the kind. described and a sticky fluxing agent containing mineral oil by means of moderate heat followed by friction milling until the product is smooth and uniformly pasty.

8. A shoe-bottom filler, consisting of a binder and comminuted filler material mixed together to a semi-solid consistency sluggishly moldable in mass when cold, said binder being derived from a resinous vegetable gum and a fluxing compound containing low-melting petroleum residuum.

9. A shoe-bottom filler, consisting of binder and comminuted filler material inixed'together to a semisolid consistency sluggishly moldable in mass when cold, said binder being derived from a rubbery mass and a fluxing compound containing lowmelting petroleum residuum.

10. A filler compound, comprising a melt? ablevegetable gum disintegrated in a fluxmg compound containing mineral oil and creosote.

11. A filler compound, comprising a vegetable gum disintegrated in a lluxing compound containing limpid mineral oil, creosote, and resin.

12. A filler compound, comprising a meltable vegetable gum disintegrated in a fluxing compound containing wax tuilings and resin.

13. A filler compound, comprising pontianalc and a fluxing agent containing mineral oil and creosote.

14. A filler compound, comprising pontianak and a fluxing agent containing resin, mineral oil and creosote.

15. A filler for filling the bottom cavities of shoes, comprising a meltable vegetable gum thoroughly admixed to a semi-solid state with filler body material and sticky Wax tailings- 16. A. shoe bottom filler, comprising a binder of rubber-like vegetable gum combined with and Wholly disintegrated by an oily fluxing agent, and reduced to a pasty permanently adhesive, tenacious, flexible, Waterproof, and cementitious mass, thoroughly mixed with a mass of finely comminuted filler material.

v In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

AN DREW THOMA. Witnesses:

"G110. H. MAXWELL, EDWARD MAXWELL.

Copies 01' this patent may be olatained tor five cents each, by addressing the Commissioner of Patents,

' Washington, D. G." a