US1919464A - Method of manufacturing boots or shoes - Google Patents

Description

July 25, 1933. c. H'. DANIELS METHOD OF MANUFACTURING BOOTS 0R SHOES 3 *Sheets-Sheet l Filed Sept. 24 1931 July 25, 1933- c. Hl DAIELS 1,919,464

METHOD OF MANUFACTURING BOOTS OR SHOES Filed Sept. 24. 1931 3 Sheets-Sheet 2 V', If

July 25, 1933- c. H. DANIELs 1,919,464

METHOD OF MANUFACTURING 'BOOTS QR SHOES Filed sept. 4. 1951 :sl sne's-shet 5 jglz.

Patented July 25, 1933 PATE - maar CLAUDE H. DANIELS, F NEWTON CENTER, MASSACHUSETTS METHOD OF MANUFACTURING BOOTS OR SHOES Application filed September 24, 1931.

My present invention relates to boots and shoes, and more particularly to a novel and improved method of manufacturing boots and shoes.

Basically considered, my present invention resides in treating certain portions of boot or shoe upper materials with an adhesive capable of being rendered tacky, sticky, or cementitious upon the application of heat, per- G mitting said adhesive to return to its normally non-tacky condition, then lasting the shoe in the usual method, and, after lasting, subjecting the treated shoe to heat, whereby the adhesive will be rendered tacky, and, through permeation and adhesion, will unite the treated parts or sections, together with adj acent parts or sections to which the adhesive is transferred by the heat, into an integral unit.

My novel method, wherein the adhesive remains dormant during the lasting operation, and until a predetermined application of heat,- presents many advantages over prior methods of shoe manufacture. It obviates the necessity ofl lasting upper materials on to an insole in conjunction with an adhesive which is in a tacky condition, an advantage which will -be instantly apparent to those skilled in this art. Itv obviates the likeli- 3 hood of' damage or injury to the shoes which is present when lasting a shoe with a sticky or tacky adhesive. It results in a considerable saving in time, and hence of money.

My invention may be practiced with any type or style of shoe, the showing of the drawings in the present application being for illustrative purposes only, as will be readily understood.

In carrying out my present invention the adhesive may be applied to the insole, as a complete coating, or it may be applied to predetermined portions of the insole, as for example, a marginal strip around the edge of that surface of the insole which contacts with i5 the upper materials'. If desired I may apply said adhesive to the upper materials, including a counter, coating either or both of the folded marginal edges ofsaid counter, de-

pending upon which portion of the other ma- 50 terials have been treated.

An other importa Serial No. 564,746.

nt feature of the present invention resides in applying to the shoe,

while the adhesive is still in a tacky condition, ajbottom filler, or a shank stilfener, or

both, whereupon the thus far completed shoes.

are racked for dry shank stilfener, or

ing,'the bottom iller, or both, thus being united with the rest of the shoe as an integral part thereof, greatly facilitating the completion of the shoe from this stage forward.

All of the foregoing objects and features of my invention, together with other advantages, will be hereinafter set forth in the following detailed description.

Referring to the drawings, illustrating a preferred embodiment of the present invention,

Fig. 1 is a perspective view of an insole to which has been applied a surface coating of a suitable adhesive; Fig. 2 is a cross sectional view of a last with the insole temporarily applied thereto;

Fig. 3 is a cross sectional view illustrating the lasting of the upper materials over said insole Fig. 4 is a bottom plan view lof the lasted shoe;

Fig. 5 is a perspective view of a treated counter;

Fig. 6 is a cross sectional view on the line 6-6 of Fig. 4;

Fig. 7 is a side elevation of a lasted shoe bemg subjected to heat in a conventional heating box or unit;

Fig. 8 is `an enlarged fragmentary cross and shank stifl'ener;

Fig. l1 is a side e levation of the shoe after withdrawal of the temporary lasting tacks in position to receive the outsole;

Fig. 12 is a perspectiveqiew of an insole treated with a mar adhesive ginal layer or coating of Fig. 13 is a perspective view of the assembled shoe upper materials treated with adhesive as by dipping; and

Figs. 14 and 15 are fragmentary details of optional lining materials.

Referring now to the drawings, for a particular description of the invention, 1 designates an insole to which a coating or layer 2 of a suitable adhesive is applied in any desired or convenient manner. This adhesive 2 is of such a nature as to be normally nonsticky, or dry, being rendered tacky or mucilaginous by heat. The thus treated insole, with the adhesive 2 in a dry state or condition, is aliXed to a last 3 by temporary tacks 4.

Thereupon upper materials comprising, at the forepart, the outer layer or section 5 and the lining or inner section 6, and comprising at the heel portion these same layers with a `counter 7 interposed therebetween are assembled and the marginal portions thereof are lasted over the coated insole by any suitable lasting or wiping devices such as 8, and are secured to the insole by temporary lasting tacks 9 applied either entirely around the folded marginal edges of the upper materials or at predetermined locations or points. It will be noted, from an inspection of Fig. 5, that the folded edges 10 of the counter 7 are treated with an adhesive, similar to the adhesive 2, on both sides, before assembly with the upper materials.

The shoe as thus far constructed is then subjected, primarily at its bottom, to heat, this heat being provided from any suitable source, such as the electrically heated plate 11, the shoe being housed within the box 12 hinged at 13 to the plate 11 and provided with a handle 14 to permit accessto the shoe. Thisshowing of a heating device is for illustrative purposes only, as it will be appreciated and understood that any kind or type of heating device, with any kind of heat, may be utilized.

By thus subjecting the lasted shoe to heat, the adhesive is rendered tacky, and, at the forepart of the shoe, will permeate the lining 6, and coat the inner folded marginal edge of the outer upper section or layer 5,

asclearly illustrated in Fig. 9. The permeation of the lining 6 by the adhesive 2 may be effected because of the inherent porosity of the lining fabric 6, or I may provide an openwork lining as illustrated at 15 in Fig. 14. Or I may provide a lining 16 with a plurality of perforations or apertures 17 therethrough along its marginal edge, as illustrated in LFig. 15. A

Each of the linings illustrated in Figs. 14 -and 15 will facilitate the flow of adhesive therethrough to efect the proper union between the insole, lining and outer upper section. At the heel portion, the adhesive 2, being rendered tacky by the heat, will e'ect a firm union between the insole 1 and the heel lining 6, while the folded marginal edge 10` of the counter 7, being treated with adhesive on each surface thereof, as illustrated at 18, will firmly unite the lining layer 6, counter flange 10, and outer upper section 5.

The application of heat to the insole and marginal portions of the upper materials is continued only so long as is necessary to insure a sufficient tackiness of the adhesive to effect a thorough union between the aected parts. The shoe may then be removed from the heating unit and dried, and then com pleted in the` usual manner, or, if desired, pressure may be applied to the marginal edges of the upper materials to smooth the same. Also on removal of the shoe from the heating unit, and while the adhesive is still in a tacky condition, a bottom lle1r-19 may be applied, as well as a shank stitfener 20, each of these members being adhered to the insole by the adhesive 2, subsequent to which the shoe is racked or placed aside for drying of the adhesive, and completion in the usual manner, as by withdrawing the temporary las-ting tacks 9 and application of the outsole 21 in any desired manner.

Instead of coating the entiresurface of the insole 1 with adhesive 2, I may apply a marginal layer 22 of suitable adhesive around that surface of the insole which contacts with the uppermaterials. Thus, when the upper materials are lasted over the insole, and the lasted shoe is subjected to heat, the union between the upper materials and insole will be as complete and thorough as with the fully .coated insole illustrated in Fig. 1.

In lieu of coating the insole with adhesive, I may apply said adhesive to the upper materials, for example, as illustrated in Fig. 13, wherein each layer of the upper materials is coated with an adhesive on each side thereof, at .those marginal edges which are to be folded over the insole. Thus, when lasted over an insole, and subsequently subjected to heat, the upper materials will be united with each other and with the insole in as thorough a manner as heretofore described.

It w1ll be appreciated, however, that it is not necessaryto coat each surface lof each layer of the upper materials, as illustrated in Fig. 3. For example, at the forepart of the shoe, and referring now to Fig. 13, the llining 23 may be coated on each side, at its marginal edges, thus providing means to unite the outer layer 24 to the lining 23, and to unite the lining 23 to the insole. If the lining 23 is of such a nature or material as to permit ready permeation or flowing of the adhesive therethrough, it will lonly be necessary to apply a coatmg of ladhesive tothe insole-contacting marginal edge of said lining, as will be understood. At the heel portion of the shoe, if the lining 25 is coated at its marginal edge, then it will only be necessary.

to coat one surface, namely, the outer marginal edge of the counter 26. ln each of these instances, when the upper materials are folded and lasted` over onto the insole, and then subjected to heat, the resulting union will be the same, firmly uniting all parts of the upper materials and the insole into one integral unit, preparatory to the ensuing steps of completing the shoe.

l believe that the above described method of manufacturing boots and shoes, wherein the adhesive union is effected by heat after the lasting operation, is broadly novel, and l have therefore claimed the same, in its several phases, in this application.

l/Vhile l have necessarily described my present invention somewhat in detail, it will be appreciated that I may vary the size, shape, and arrangement of parts Within reasonably Wide limits without departing from the spirit of the invention.

My invention is further described and defined in the form of claims as follows:

l. The improved method of manufacturi ing boots or shoes which includes the ,steps of coating an insole including the ball and shank portion thereof with an adhesive capable of being rendered tacky by heat, temporarily securing said insole on a last, side lasting the marginal portions 'of a boot or shoe upper section including the ball and shank portion thereof over `and into final operative position relative to said insole, securing the marginal portions `of said upper against the insole by temporary fastening means, and then applying heat primarily and directly to the lasted over portion of the upper which is not exposed in the finished shoe to render said adhesive tacky and unite said insole and upper section.

2. The improved method of manufacturing boots or shoes having insole and upper elements, comprising applying to at least one of said elements a normally non-sticky adhesive which is rendered sticky by the appli-v cation of heat, lasting the upper element across the edge and over the outer face of the insole into final operative position relative to the insole prior to the application of heat to render the adhesive sticky, securingthe upper elements against said insole by temporary fastening means and then applying heat primarily and directly to the lasted over portion of the upper element which is not exposed in the finished shoe to render the adhesive sticky and to cause the same to connect said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole and upper section, and then applying a bottom filler while said adhesive is in a tacky state in such a manner that the ller may unite with the plastic adhesive.

4. The improved method of manufacturing boots or shoes which includes the steps of coating an insole with an adhesive capable of being rendered tacky by heat, temporarily securing said insole bn a last, folding the marginal portions of a boot or shoe upper section over said insole, then applying heat to said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole and upper sections, and then applying a shank stiffene-r while said adhesive is in a tacky state in such a manner that the stiffener may unite with the plastic adhesive.

5. The improved method of manufacturing boots or shoes which includes the steps of coating an insole with an adhesive capable of being rendered tacky by heat, temporarily securing said insole on a last, folding t-he marginal portions of a boot or shoe' upper section over said insole` then applying heat to said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole and upper sections, and then applying a bottom filler and a shank stiii'ener while said adhesive is in a tacky state in such a manner that the filler and stiii'ener may unite with the plastic adhesive.

6. The improved method of manufacturing boots or shoes, which includes the steps of coating an insolewith an adhesive capable of being rendered tacky by heat, temporarily securing said insole on a last, folding the marginal portions of a boot or shoe upper l section over said insole, securing the marginal portions of the upper section against the insole by temporary fastening means, then applying heat to said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole and upper section, then applying a bottom filler while said adhesive is in a tacky state in such a manner that the filler may unite with t-he plastic adhesive, and then removing the tempprary fastening means and completing the s oe.

7. vThe improved method of manufacturing boots or shoes, which includes the steps of coating an insole with an adhesive capable of being rendered tacky by heat, temporarily securing said insole `on a last, folding the marginal portions of a boot or shoe upper section over said insole, securing the marginal portions of the upper section against the insole by temporary fastening means, then applying heat to said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole and upper section, then applying a shank stiflener lof being rendered tacky by heat, temporarily securing said insole on a last, folding the marginal portions of a boot or shoe upper section over said insole, securing the marginal portions of the Lipper section against the insole by temporary fastening means, then applying heat to said insole and the marginal portions of said upper to render said adhesivetacky and unite said insole and upper section, then applying a bottom filler and a sha-nk stiffener While said adhesive is in a tacky state -in such a manner that the filler and stitl'ener may unite with the plastic adhesive, and then removing the temporary fastening means and completing the shoe.

9. The improved method of manufacturing a boot or shoe having insole and upper ele ments the latter of Which comprises plural layers of material one of which is permeable by an adhesive, comprising applying to at least one of said elements a normally :nonsticky adhesive which is rendered sticky by the application of heat, lastingthe plural layer upper element over the insole into final operative position relative thereto prior to the application of heat to render the adhesive sticky, securing the upper elements against said insole by temporary fastening means, and then applying heat primarily and directly to the lasted over portions of the plural layer upper element to render the adhesive sticky and to cause the same to permeate the permeable layer of the upper, thereby to adhesively connect the layers of the upper element to each other and to the insole.

10. The improved method of manufacturing boots or shoes, which includes the steps of temporarily securing an insole on va last, coating the marginal portions of a boot or shoe upper, including the marginal portion of a counter, with an adhesive ca able of being rendered tacky by heat, fol ing'the' marginal portions of said upper section including said counter over said insole, securing the marginal portions of the upper and counter against the insole by temporary fastening means and then applying heat to said insole and the marginal portions of said upper and counter to render said adhesive tacky and unite said insole, upper section and counter.

l1. The improved method of manufacturing boots or shoes, which includes the steps of temporarily securing an insole on a last, coating the marginal portion ofthe lining of a boot or shoe u per with an adhesive capable of being ren ered tacky by heat, coating at least one surface of the marginal portion of a counter 'with a similar adhesive, assembling the upper and counter on a last, folding the marginal portions of said upper and said counter -over said insole, and then applying heat to said insole and the marginal portions of said u per and counter to render said adhesive tac y and unite said insole, upper section and counter.

12. The improved method of manufacturing boots or shoes, which includes the steps of coating an insole with an adhesive capable of being rendered tacky'by heat, coating the marginal portion of a counter with a similar adhesive, temporarily securing said insole on a last, folding the marginal portion of a boot or shoe upper section including said counter over said insole, securing the marginal portions of the upper section and counter against said insole by temporary fastening means, and then applying heat to said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole, upper section and counter.

13. The'improved method of manufactur ing boots or shoes, which includes the steps of coating an insole with an adhesive capable of being rendered tacky by heat, coating the marginal portion of a counter with a similar adhesive, temporarily securing said in sole on a last, folding the marginal portion of a boot or shoe upper section including said counter over said insole, securing the marginal portions of the upper section and counter against the insole by temporary fastening means, and then applying heat to said insole and the marginal portions of said upper to render said adhesive tacky and unite said insole, upper section and counter.

CLAUDE H. DANIELS.

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