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Nov. 8, 1938. C. ROBERTS‘ MANUFACTURE OF SHOES AND SHOE BOTTOL‘I.1. Filed July 27, 1936 2,135,676 Patented Nov. 8,1938 . 2,135,676 UNITED STATES‘ PATENT OFFICE 2,135,676 MANUFACTURE or snoas AND snon no'r TOM UNITS. Clifford Roberts, Winchester, Hum, alsig'nor to United Shoe Machinery Corporation, Paterson, N. 1., a corporation of New Jersey Application July :1, 1m, ‘No. 92,790 6 Claims. (01. 12-142) This invention relates to improvements in shoes and shoe bottom units and to improvements in methods of making shoes. I . 1 In United States Letters Patent No. 2,065,463, 5 granted December 22, 1936, upon application of John M. Whelton, there is disclosed a shoe bottom , unit comprising an insole, a heel and shank rein forcing piece which is secured to the lower or lasting side of the insole and which entirely 10 covers the heel and shank portions thereof, and a shank stiffener which is interposed between the reinforcing piece and the insole. The reinforc ing pieces for such insole units are commonly made of ?berboard or similar sti? material of 15 laminated formation and in the manufacture of a shoe embodying such an insole unit it is a com mon practice to secure the margin of the upper in overlasted position upon the ?ber reinforcing piece by means of cement. While a su?iciently 20 ?rm attachment of the upper to the outermost layer of the ?berboard is established in most cases, it sometimes happens that one or more of the ?berboard layers become separated from the rest of the reinforcing piece as a result of the 25 strains to which the bottom of the shoe is sub jected while it is being worn and in such cases the .attachment of the insole unit to the upper be portlon of the reinforcing piece are cut substan tially perpendicular to the surfaces of the piece so as to constitute ‘upstanding lasting shoulders for deflecting upwardly the surplus lasting allowance of the upper and thus to facilitate subsequent 5 trimming of the latter. _ In making a shoe embodying my improved reinforced insole unit the upper, after being as sembled with an insole unit on a last, is lasted over the exposed insole surface in the shank por- 10 tion of the unit and secured in overlasted posi tion thereon preferably by means of cement with the surplus portions of its lasting allowance up standing beside the opposite edges of the rein forcing piece, the upstanding portions of the 15 upper are trimmed substantially ?ush with the exposed surface of the reinforcing piece and with the outer surfaces of the rest of the over lasted upper, and an outsoie is laid and its shank portion secured by means of cement to the over- 20 lasted portions of the upper including the trimmed edges of the latter. Thus, not only is the upper secured to the insole unit in such a way that its attachment is not liable to be subse quently weakened, but a substantially continuous 25 surface is provided in the shank portion of the shoe bottom for the reception of an outsole and comes unduly weakened. ' . a secure bond of adhesion is established between For the purpose of avoiding such an undesir the outsole and the shoe bottom. . 30 able condition the reinforced insole unit herein Invention is also to be recognized as residing 30 illustrated is of improved construction having a _in certain improved features of shoe construction reinforcing piece of ?berboard or similar mate resulting from the practice of the above-described , ‘rial at the lower or lasting side of its shank por method. _ tion which is substantially narrower than the The invention will now be explained with ref ' 35 shank portion of the insole and is arranged to . erence to the accompanying drawing, in which- 35 expose marginal surfaces of substantial width at Fig. 1 is a perspective view of my improved opposite sides of the reinforcing piece for the insole unit; reception of lasting cement thereby enabling the Fig. 2 isv a sectional view thereof taken along shoe ‘upper to be cement-lasted directly to the 40 shank portion of the‘ insole itself. Thus, by em ' the line II-II of Fig. l; r ' Fig. 3 is a cross-sectional view of the shank 40 ploying an insole vof leather or other material which is not of laminated formation (or which, if laminated, has its component layers so ?rmly s'e portion of the insole unit; , cured together that there is little if any tendency having embodied therein my improved insole unit; 45 Fig. 5 is a view similar to Fig. 4 but illustrating a further stage in the manufacture of a shoe; and Fig. 61s a fragmentary cross-sectional view of 45 for them to become separated) any inherent weakness‘ in the attachment of the upper to the insole unit is positively insured against. Prefer ably, and as herein shown, the reinforcing piece, while narrower than the shank portion of the in 50 sole, is nevertheless su?iciently wide to provide for a sufficient width of bonding area between the reinforcing piece and the insole to insure that the desired transverse curvature of the shank por-.-~ tion of the unit shall be maintained. Moreover, 55 as illustrated,_the opposite edges of the narrow Fig. '4 is a fragmentary cross-sectional view of a shoe in the course of construction, the shoe the completed'shoe. - Referring to the drawing, my improved insole 5d 7 unit comprises a full-length insole ll preferably of leather or other non-laminated material to ‘which lasting cement will readily adhere, a heel and shank reinforcing piece I! which may be composed of ?berboard or similar stiff material 55 2, 135,676 2 the shank portion of} the shoe bottom the surplus and which is secured by means of cement to the insole, and a metallic shank sti?ener strip ll which is interposed between the reinforcing piece and the insole. As shown, the shank stiffener H has the usual longitudinal curvature and the shank portions of the reinforcing piece I! and lasting allowance of. the upper will be de?ected upwardly while being wiped inwardly against the lasting shoulders 22 and thus caused to assume an upstanding position as indicated at 32 in Fig. 4. To assist in establishing this condition the tacks 30, as shown, are driven close to the lasting shoulders 22. After the lasting cement has set su?lciently to hold the upper securely in place the lasting tacks are withdrawn, and the the insole iii are curved longitudinally to corre spond to the longitudinal curvature of the shank stiffener M of the last with which the unit is to be 10 used and, in addition, the shank portions of the surplus lasting allowance is trimmed. reinforcing piece and the insole are curved trans In the‘ shank portion of the shoe the trimming of the upper is greatly facilitated by the fact that the _ surplus portions of the upper material are up- " standing, as already described. Moreover, the 15' versely to correspond to the transverse curvature of the bottom of the last. The shank stiffener H has a burr or spur It struck up from its rear por 15 tion and embedded within the material of the re upper is trimmed in the shank portion of the shoe so that its trimmed edges N are located closely adjacent to the edges of the reinforcing inforcing piece I! to assist in holding the shank stiffener in place and the forward portion of‘ the shank sti?ener is received within an opening in piece i2 and substantially flush with the outer surface of. the latter and with the outer surface of the adjacent overlasted portions of the upper. Thus, the presence of the lasting shoulders 22 the form of an open notch il in the forward por 20 tion of the reinforcing piece so that it is posi tively maintained against lateral edgewise dis placement. As shown, the heel portion of the reinforcing piece l2 has substantially the same lateral edge: 25 contour as the heel portion of the insole but the shank portion of the reinforcing piece is sub-‘ stantially narrower than the shank portion of the‘lnsole'so that marginal surfaces 20 of sub stantial width are exposed at the lower or last 80 ing side of theinsole for the reception of lasting cement in the process of cement lasting a shoe upper to the insole unit. The reduced or nar rowed shank portion of the reinforcing piece l2, however, is substantially wider than the shank 35 stiffener i4 and is so arranged that after cement attachment of the reinforcing piece to the insole the attached portions will be of sufficient width at opposite sides of. the shank stiffener effectively to‘ maintain the desired transverse curvature of 40 the shank portion of the insole unit. Moreover, as shown, the opposite edges of the relatively narrow shank portion of the reinforcing piece are substantially perpendicular to its upper and lower surfaces so as to constitute substantially insures that, as a result of the lasting‘ and trim ming operations, a smooth bottom surface is pro vided to receive the outsole and one which is practically continuous from one lateral ‘edge of the insole to the otherin the shank portion of the shoe bottom. After the upper has been trimmed it is only necessary to roughen the outer surface of the 80 overlasted margins of the upper and coat them with cement in the‘ usual way to prepare for the cement attachment of an outsole, such as the outsole 36, the margins at the attaching side of which have ‘also been roughed and coated with cement. In accordance with the usual practice the cement coatings are applied to a quantity of outsoles and shoe bottoms before any of the out~ soles are attached and a suitable. solvent is em ployed to soften the cement just prior to the 40 attachment of a particular outsole to a particular shoe. After the outsoles have been laid in place upon the shoe bottoms the attaching pressure is supplied by the use 01'. a suitable sole-attach 45 “ Inasmuch as the reinforcing piece l2 has been allowance of the upper and thereby facilitating made narrow enough in its shank portion to ex the trimming of the latter. The reinforcing piece pose su?iciently wide areas of the insole surface is beveled to a thin edge at its forward extremity ' at opposite sides of the reinforcing piece in. the which is located approximately at the break line shank portion of the shoe bottom, the upper will of the insole. Forwardly and upwardly sloping be secured by cement directly to the leather in sole itself in that portion as well as in the fore beveled surfaces 23 are formed upon the heel por tion of the reinforcing piece at opposite sidesof part of the shoe and there will be no danger that the relatively narrow shank portion thereof to the attachment in the shank portion will subse quently become weakened as might happen if the 55 prevent the formation of. any objectionable ridges upper were cement attached to a reinforcing piece in the over-lasted upper between those portions which are secured directly to the insole in the of the customary laminated formation. Further more, the shank portion of the outsole will con shank portion of the shoe and those which over lie the reinforcing piece at theheel of the shoe. form accurately to the transverse curvature of The edges of the insole are shown as being beveled the last bottom, due to the facts that the outer 60 somewhat along its shank portion-and around surface of the overlasted upper in that portion of the shoe is substantially flush with the outer sur its heel end and the lateral edge of the heel por tion of the reinforcing piece is beveled to blend face of the shank reinforcing piece and there are 45 perpendicular lasting shoulders 22 for de?ecting ing press in a well-known manner. into upstanding positions the surplus lasting with the bevel on the insole. 65 - In making a shoe embodying the above-de scribed insole unlt, as shown in Fig. 4, the insole unit is assembled with a shoe upper 24 upon a last 26, the insole unit being tacked to the last bottom and the upper being worked over the 70 last and having its margin secured in overlasted position upon the insole unit by means of cement. - In Fig. 4 the lasting cement is indicated at 28. no spaces or cavities present between those sur faces. Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: > 1. A reinforced shoe bottom unit comprising an insole having integral forepart, shank and heel portions, said shank portion being transverse ly curved to correspond to the transverse To hold the overlasted upper margins in place curvature of the bottom of a last, a heel while the cement is setting tacks may be em and shank reinforcing piece located at the 75 ployed such as the lasting tacks II. Fig. 4. In lower or lasting side of the insole, and a narrow 75 2,185,676 3 shank stiffener strip interposed between said curvature of the shank portion of the insole, the parts, said reinforcing piece having its heel por tion of substantially the same lateral edge con tour as the heel portion (of the insole and having its shank portion substantially narrower than the shank portion of the insole and said shank portion having perpendicular edge faces extend ing throughout its entire length to constitute lasting shoulders, said reinforcing piece being 10 secured by means of adhesive to the insole at both sides of the shank stiffener throughout areas of substantial width su?icient to maintain the trans verse curvature of the insole, and said insole hav ing marginal portions of its lower surface left bare throughout areas of substantial width at opposite sides of the reinforcing piece for the re ception of lasting cement. 2. A reinforced insole unit comprising an insole, a reinforcing piece secured to the shank portion 20 of the insole and having an opening in its forward , portion, and a narrow shank stiffener strip inter posed between said parts and having a forward portion retained against lateral edgewise displace ment by engagement within said opening, said re 25 inforcing piece being shaped to expose marginal insole surfaces of substantial width extending substantially throughout the length of the shank portion of the insole for the reception of lasting fastenings and having opposite edge faces perpen 30 dicular to its upper and lower surfaces providing lasting shoulders perpendicular to said exposed insole surfaces ‘and extending substantially throughout the full length of the shank portion of the insole. 35 3. A shoe comprising, in combination, a rela tively ?exible insole, a relatively hard and stiff heel and shank reinforcing piece secured to the lasting side of the insole, and a shank stiffener interposed between said parts, said reinforcing 40 piece covering the heel seat of the insole and ex tending forwardly to the ball portion thereof but having its shank portion substantially narrower than the shank portion of the insole and of uni form thickness throughout its width, an upper 45 having marginal portions secured in overlasted positions upon the insole at opposite sides of the .narrow shank portion of the reinforcing piece with their outer surfaces substantially ?ush with the outer surface of said reinforcing piece, and 50 an outsole cement-attached to said surfaces of the overlasted upper. 4. A shoe comprising, in combination, an insole composed of relatively soft material to which 55 lasting cement will readily adhere‘ and having a transversely curved shank portion, a relative ly hard and stiff heel and shank reinforcing piece secured to the lasting side of the insole and con forming in its shank portion to the transverse reinforcing piece covering the heel seat of the in sole and extending forwardly to the ball portion but being substantially narrower than the insole along the shank portion of the latter and having Cr perpendicular edge faces along said narrower por tion and an opening in its forward end portion, a narrow shank stiffener interposed between the in sole and said reinforcing piece and having a por tion received in said opening, an upper cement 10 lasted to the margins of the insole at opposite sides of the narrow shank portion of said rein forcing piece and having its inner extremities abutting the perpendicular edge faces of said re inforcing piece, and an outsole cement-attached to the overlasted margins of the upper. ‘ 5. A shoe comprising, in combination, an insole composed of relatively soft material to which lasting cement will readily adhere, a relatively hard and stiff heel and shank reinforcing piece secured to the lasting side of the insole, the re?l forcing piece covering the heel seat of the insole and extending forwardly to the ball portion there of but being substantially narrower than the in sole along the shank portion of the latter, a 25 narrow shank stiffener interposed between the insole and the reinforcing piece, an upperhav~ ing marginal portions secured in overlasted posi tions upon the insole at opposite sides of the narrow shank portion of the reinforcing piece, 30 the outer surface of said overlasted upper portions being substantially ?ush with the outer surface of said reinforcing piece, and said overlasted up per portions having trimmed edges lying closely adjacent to the edges of said reinforcing piece and 35 substantially flush with the outer surface of the latter, and an outsole cement-attached to said outer surface and to said trimmed edges. 6. That improvement in methods of making shoes which consists in assembling with an upper on a last an insole unit comprising an insole hav ing exposed marginal lasting surfaces of sub stantial width in its shank portion and a shank reinforcing piece the opposite lateral edges of which constitute substantial perpendicular last 46 ing shoulders extending along the inner bound aries of said insole lasting surfaces, lasting the upper over said insole lasting surfaces and against said shoulders and securing it in overlasted po sition upon the insole with surplus portions of its lasting allowance upstanding beside said shoul ders, trimming said surplus lasting allowance substantially flush with the exposed surface of said reinforcing piece, and laying an outsole and securing it by means of cement to said overlasted portions of the upper including said trimmed edges thereof. CLIFFORD ROBERTS.