US3680162A

US3680162A - Method of making welt shoes

Info

Publication number: US3680162A
Application number: US138939A
Authority: US
Inventors: Arnold Glickman
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-04-30
Filing date: 1971-04-30
Publication date: 1972-08-01
Anticipated expiration: 1989-08-01

Abstract

An improved method of making Goodyear welt shoes which consists in bonding a shoe upper and lining therefor, by placing an intermediate top boxing sheet, prymarily of normally rigid polystyrene, in position, the polystyrene having been softened for operative adhesion, applying pressure to the combination of elements and securing bonding of the liner to the upper, supporting the assembly with an insole positioned under the last, the insole carrying a marginal downwardly-projecting rib disposed inwardly of the edge of the insole, providing a wiper-resistance member, the resistance member conforming with the controur of the last, said resistance member entering the area of the insole inwardly of said rib and closely adjacent thereto, pulling the margins of the insole edge and outwardly of the rib, providing an adhesive-ejecting member adapted for pressure-ejection of a thermo-plastic adhesive on the exposed surface of said rib in a controlled localized manner, exerting inwardly direted action of a wiper, marginally conformed with the resistance member, against the upper and forcing an intermediate area of its margins under the insole and against the adhesive carried by the outer face of the rib, with time-heat interval of the wiper to form a bond, removing the last, and stitching the assembly through the welt, through the inwardly direceted boxed formation of the upper margin, and through the rib close to its apex, to be followed by assembling a filler and outsole to the assembly.

Description

Unite States atent Glickman 51 Aug. 1, 1972 [54] METHOD OF MAKING WELT SHOES [72] Inventor: Arnold Glickman, 73 Jackson Ave.,

Rockville Center, NY. 1 1570 [22] Filed: April 30, 1971 [21] Appl. N0.: 138,939

[52] US. Cl. ..12/142 D [51] Int. Cl. ..A43d 9/00 [58] Field of Search ..12/7, 7.2, 10.1, 10.5, 12.4,

[56] References Cited UNITED STATES PATENTS 3,251,081 5/1966 Springer ..l2/10.l 3,462,783 8/1969 Glickman ..12/142 D Primary ExaminerPatrick D. Lawson Attorney-W. Lee Helms [57] ABSTRACT An improved method of making Goodyear welt shoes which consists in bonding a shoe upper and lining therefor, by placing an intermediate top boxing sheet, prymarily of normally rigid polystyrene, in position,

the polystyrene having been softened for operative adhesion, applying pressure to the combination of elements and securing bonding of the liner to the upper, supporting the assembly with an insole positioned under the last, the insole carrying a marginal downwardly-projecting rib disposed inwardly of the edge of the insole, providing a wiper-resistance member, the resistance member conforming with the controur of the last, said resistance member entering the area of the insole inwardly of said rib and closely adjacent thereto, pulling the margins of the insole edge and outwardly of the rib, providing an adhesiveejecting member adapted for pressure-ejection of a thermo-plastic adhesive on the exposed surface of said rib in a controlled localized manner, exerting inwardly direted action of a wiper, marginally conformed with the resistance member, against the upper and forcing an intermediate area of its margins under the insole and against the adhesive carried by the outer face of the rib, withtime-heat interval of the wiper to form a bond, removing the last, and stitching the assembly through the welt, through the inwardly direceted boxed formation of the upper margin, and through the rib close to its apex, to be followed by assembling a filler and outsole to the assembly.

2 Claims, 12 Drawing Figures PATENTEDAUG 1 I972 3.680.162

sum

1 or 2 11'"; a 7 1 O :1 Q 1 ll JMOZJIAVLYTOILM I we METHOD OF MAKING WELT SHOES My' Invention constitutes an improvement over the method subject of my US. Pat. No. 3,462,783 of Aug. 26, 1969.

The invention will be described with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view, showing an insole with its inset rib, a welt, a filler piece, an outer sole and a heel, which when assembled with an upper forms a Goodyear welt shoe.

FIG. 2 is a transverse section through a Goodyear welt shoe taken on a line somewhat inwardly of the toe, and showing section of a last (which is removed preliminarily to the stitching operation).

FIG. 3 is a top plan view, largely schematic, and

partly in dotted lines and partly broken away, showing the forepart of a shoe in full lines and one form of wipe which can be used. FIG. 4 is a view in elevation and partly in section on the line 4-4, FIG. 3, the view having added thereto gripper members for pulling down margins of the upper preliminary to the action of the wiper. The resistance member has been shown lowered for clarity of illustration.

FIG. 5 is a vertical section taken on the line 55,

' FIG. 3.

FIG. 6 is a view similar to FIG. 5 showing the opposed grippers acting with a pull on the upper margins to a greater extent than in FIG. 5. It is in the position of the elements shown in this Figure that the adhesiveejectirig member is elevated, in a succeeding movement, and operated.

FIG. 7 is a view similar to FIG. 6 showing release of the grippers at or immediately preceding the action of the wiper on the upper margins, and after the adhesiveejecting member has been lowered.

FIG. 8 is an enlarged transverse section similar to FIG. 6 to which has been added a forwardly positioned vertical section of the adhesive-ejecting member taken at the front area thereof, the member being ready for final upward movement to operative position. Sufficient clearance with respect to the gripper is provided so that outward swing thereof is not needed.

FIG. 8 A is a fragmentary vertical section of the elements shown in FIG. 8, with the adhesive-ejecting member in position for operation.

FIG. 8 B is a view similar to FIG. 8 A showing the ad hesive-ejecting member lowered out of view and the wiper, as to a section thereof, moved into operative position.

FIG. 9 is a top plan view showing the resistance member and the adhesive-ejecting member surrounding the same, the view being in part full and dotted lines, inlet and flow ducts for the adhesive being indicated.

FIG. 10 is a schematic generally-perspective'view showing a type of polystyrene toe boxing member intermediate a liner and insole, with a pressure plate, in section, ready for imposing pressure on the assembly.

The abstract of my method, at the opening of this Specification sets forth the salient steps of the present invention, and in comparison with the Goodyear weltlasting prior to my US Pat. No. 2,462,783 and the method of said patent, the invention herein eliminates the handling and time-taking procedures of brush-applying adhesive to the lining between its face and the upper; the like applying of adhesive to the rib of the insole; and the provision for the latter of an automatically-acting injector.

To make the disclosure complete without the necessity of specific reference to the drawings of my said patent, FIGS. 1 to 7 of the present drawings reproduce FIGS. 1 to 7 of the said patent drawings with like reference characters.

In FIG. 1 the primary elements of a Goodyear welt shoe are shown. At 1 is shown an insole to which has been secured an insole rib 2 which extends downwardly and is inset relatively to the insole outer edge. Under the insole is shown a welt 3. Below the welt is a filler piece 4, followed by an outsoleS and a heel 6. FIG. 2 shows a transverse section of the completed shoe just back of the toe area and with a last therein, In allied FIGS. 3 and 4 the lower margins 8 of the upper are engaged by pull clamps 9 and the wiper elements 12 in position. While any suitable wiper may be employed that shown in FIGS 3 and 4 consists of five segments pivoted together at 12, the end segments being pivotally connected by link 14 engaged by a shaft 15 which will lead to means for advancing and retracting link 14. At 10x is a resistance member operable by headed shaft 10.

FIGS. 5 and 6 show the lower margins 8 of the upper engaged by the pull clamps 9 and the wiper elements ready for inward movement, and in FIG. 6 the resistance member l0 has been raised and engaged with the insole and inner face of the rib 2, the pull clamps having been moved downwardly and giving clearance for the adhesive injector shown in FIGS. 8, 8A, 8B and 9, which then can be elevated and operated. FIG. 7 shows the step following the operation of the adhesive injector, the pull clamps 9 being released from the upper simultaneously with inwardly pressed wiping force on the margins of the upper against the rib 2. The adhesive normally is a cement, heat-pressure sensitive, and the wiper surfaces are normally heated, so that, for example, ata heat of 350 F. the wiper may remain withits active pressure engagement of only about 6 seconds to make the bond. v

Theadhesive-injector is illustrated in FIGS. 8, 8A, 8B and 9 inclusive. Reference to FIG. 9 will show that its body 15 is in marginal conformation with an insole, and that over it is positioned the

resistance member

10, 10 the actuating shaft for the latter projecting through a large open area of the body 15, shown as bounded by the broken lines at 15.

The margin of the adhesive-injector 15 is formed as an umstanding curved chamber, beveled at its top, said beveled face having spaced apertures, indicated at 19,

for passage of the adhesive. At the forward portion of the injector body it has a receiving duct for its adhesive chamber, indicated at 18, and communicating with a tube-like passage 19 which at its outer end carries a threaded inlet member 20 adapted for flexible tube connection with a suitable pump device, such as a minature piston pump thrown into action by a solenoid,

' as well known.

Referring to FIG. 8, it will be understood, in view of the position of the actuating shaft 16 for the resistance member 10 shown in FIG. 9, that the vertical section through the adhesive-injector member of the Figure is taken forwardly of the section line 88, FIG. 9, that section line being that of the over-lying member of FIG. 8 carrying actuating shaft 16 which, as shown in FIG. 9, passes through the large passageway in the adhesive-injector body bounded by dotted lines l5 of that Figure.

Referring to FIG. 8A it will be seen that the adhesiveinjector 15 has been raised to upper operative position, and thereupon by simple switch-closing of a circuit through the adhesive pump solenoid, when such means are employed, the adhesive will be pressure applied uniformly to the rib of the insole indicated at 2. The next operation is shown by FIG. 8 B. The adhesive-injector having been lowered, and the grippers having releasted the lower margins of the upper (as indicated in FIG. 7), the wiper is actuated, forcing said upper margins into firm engagement with the adhesive carried insole rib, and holding said engagement for the time required for bonding, as hereinbefore described.

A step allied with the described Improvements will now be given reference:

In the construction of a Goodyear welt shoe, the upper assembly usually consists of a lining, box toe and vamp. The box toe frequently is of the polystyrene type, although other types are used as well. The upper and lining have usually been stitched together around the inner quarter margin, tongue, instep, or throat, depending upon style. However, the lining and the upper around the entire toe-part of the vamp is usually loose, and is commonly referred to as a loose lining. By this is meant that the lining and upper are not adhered together and are attached only toward the middle and rear of the vamp. There has been some use of a polystyrene box toe piece which at the time use has been dipped into a polystyrene solution for softening and then slipped between the upper and lining assembled on a wooden last. Then the assembly has been put in a pullover machine, with the operation of pulling the assembly of upper, lining and box toe over the last in the forepart of the shoe and driving in tacks to temporarily hold the three components together until the assembly goes to another lasting machine. However no thought or achievement was present as to securing a bond between the upper and the lining. By the present Improvement the bondded lining and upper at the criti-' cal forepart of the shoe is secured, asfollows with reference to FIG.

In FIG. 10, which is merely schematic to indicate'the steps employed, I have shown the forepart of an upper at 21, the lining at 22 and an inserted boxing piece, preferably of polystyrene, but which may be of any material which will fairly rapidly harden after the shoe construction is finished, and capable of remaining conformable after a period of pressure and preferably both heat and pressure. Polystyrene preferably carried by a web of fabric supplies these requirements, when as a solid. sheet it may be softened in a solution of polystyrene for conformation, as over a last.

Before application to a last, the assembly of upper 21, lining 22 and normally solid piece of polystyrene boxing 23 are associated, first by adequately saturating the boxing piece by the solvent and to the extent of not only softening it for conformation as a box toe piece, but of providing an adhesive member thereof capable of strong adhesion when, in the illustrated assembly, pressure, preferably with heat, is applied to the upper b a member chematicall indicate at 24.

By the method a permai ient bon is secured betwen the lining, the upper'and the box toe, while the pliability of the box toe piece remains for lasting, with subsequent hardening.

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

' l. A method of making welt shoes which consists in placing a shoe upper on a last,'supporting an insole positioned under the last, the insole carrying a marginal rib formed with a downwardly projecting lip disposed inwardly of the edge of the insole, providing a wiper-resistance member as an element of said support, the resistance member generally conforming with the contour of the last at its lower base edge, said resistance member entering the area of the insole inwardly of said rib and closely adjacent thereto, pulling the margins of the upper over the insole edge and outwardly of the rib, automatically'injecting a thermoplastic type of adhesive intermediate the rib and the margins of the upper, and on at least one of the two, simultaneously releasing the tension-pull of the margins of the upper and exerting inwardly directed action of a wiper against the upper and thereby forming an intermediate area of its margins under the outer edge of the insole and against the outer face of the rib, while such action is opposed by the resistance member, with time interval of the wiper to form a bond, to be followed by removing the last, and stitching the assembly through the welt, through the inwardly directed bonded formation of the margins of the upper and assembling a filler and outsole to the assembly.

2. A method of making welt shoes in accordance with claim 2, in combination with the steps of combining and bonding a liner to the fore area of an upper and a lining, which consist in providing an upper, a lining therefor, and a toe boxing piece primarily of polystyrene and normally solid, saturating said toe boxing piece with a polystyrene solution, placing said polystyrene piece between the upper and the lining, and applying pressure to the assembly until the three elements are bonded together, and removing the bonded elements from the pressure means.

Claims

1. A method of making welt shoes which consists in placing a shoe upper on a last, supporting an insole positioned under the last, the insole carrying a marginal rib formed with a downwardly projecting lip disposed inwardly of the edge of the insole, providing a wiper-resistance member as an element of said support, the resistance member generally conforming with the contour of the last at its lower base edge, said resistance member entering the area of the insole inwardly of said rib and closely adjacent thereto, pulling the margins of the upper over the insole edge and outwardly of the rib, automatically injecting a thermoplastic type of adhesive intermediate the rib and the margins of the upper, and on at least one of the two, simultaneously releasing the tension-pull of the margins of the upper and exerting inwardly directed action of a wiper against the upper and thereby forming an intermediate area of its margins under the outer edge of the insole and against the outer face of the rib, while such action is opposed by the resistance member, with time interval of the wiper to form a bond, to be followed by removing the last, and stitching the assembly through the welt, through the inwardly directed bonded formation of the margins of the upper and assembling a filler and outsole to the assembly.