US1773559A - Sole-trimming machine - Google Patents

Description

W 1930 P; J. WENTWORTH 3,559

SOLE TRIMMI NG MACHINE Filed Dec. 17, 1926 s Sheets-Sheet '1' ditto-M4630 Aug. 19, 1930. PQJ. WENTWORTH 9 9 SOLE TRIMMING MACHI-NE Filed Dec. 17,1926 :ssheets-sneet 2 Aug. 19, 1930. R J WENTWORTH 1,773,559

' SOLE TRIMMING MACHINE Filed Dec. 17'. 1926 s Sheets-Sheet s JTI mm 1 MM W 4 o W y Patented mg. 19, -10?- PEARL WENTWORTH, OF FORT THOMAS, KENTUCKY SOLE-TRIMMING MACHINE Application filed December 17, 1926. Serial No. 155,520.

The invention relates to a machine for cutting or trimming a piece of material, as a leather stock used for shoe soles to a definite pattern outline, by a rapidly reciprocating 5 cutting tool moving against a stationary anvil or plate surface upon which the work is supported.

The machine is primarily designed for cutting or trimming the heel portion of an outer sole for shoes preferably after it has been applied or secured to the shoe upper to an outline corresponding to the outline of the heel seat or to the shape or contour of the heel portion or a lasted shoe upper and at a determined marginal distance or measurement 1nwardly therefrom and for under or bevel cutting the edge to make provision for keying the outer sole into a recess or socket formed in the top surface of a shoe heel, the trimming of the heel portion ofthe outer sole 1n such fashion being for the purpose of following the principles in method and structure ,for securely applying a wooden heel to a shoe as made the subject matter of a separate appllcation filed by me November 18, 1926, Serial No. 149,234, for improvement in shoes.

It is therefore an object of the invent on to provide a machine for rapidly cutting leather or leather-like stock to a particular pattern or outline along curved, irregular or other lines, and for marginally trimming the heel portion of an outer sole of a shoe after it has been applied to the shoe upper to correspond to the configuration or contour of the heel portion of a lasted shoe upper with provision for utilizing the lasted shoe upper as forming a gauge or pattern to which the sole is trimmed or adapting the sole to be guided along a row or line of tacks used in securing the sole to the upper. 7

Other objects relate to' the provision of gauging or guiding instrumentalities actuated by the operator for varying the gauging influences while the operator is manually feeding the work to the cutter.

Other features and advantages of the invention relate to the provision of an anvil or stationary plate cooperating with the movable cutter serving as a support and guide for the work and for making the necessary relative adjustment between anvil and cutter in relatively transverse directions, all of which will be more fully set forth in a description of the accompanying drawings, in which:

Figure 1 is a side elevation of the machine.

Figure 2 is a front elevation thereof, omittingthe base or pedestal portion.

Figure 3 is an enlarged sections on line 33, Figure 2.

Figure 4 is a section on line 4-4, Figure 3. co

F igure 5 is a section on line 5-5, Figure 3.

Figure 6 is a perspective view of a wooden heel for shoes, recessed to interlockingly receive the heel portion of an outer sole which 1n outline corresponds to the recess of the heel, and cut to such shape by the machine of the present invention.

Figure 7 is a perspective view of the underside of the heel portion of a shoe with the heel portion of the outer sole trimmed to an outline corresponding to the outline of the recess of the heel, and represents the work operated upon by the machine.

The machine is preferably shown and described for marginally trimming the heel portion of a shoe after it has been'applied to the upper as representing the particular use of the machine from which its utility and function can be more readily observed and its functions and mode of operation more readily understood, it being recognized that the machine can be used for other purposes.

In its preferred capacity it is desirable to trim the heel portion of the outer sole to adapt the same to be engaged or socketed into a wooden'heel for marginally securing the heel to the shoe and to practice an improved method of applying a wooden heel to a shoe to more substantially anchor the heel in position.

Referring to the drawings, 1 indicates a pedestal or base for supporting the frame or body 2 secured upon the pedestal. The body in turn sustains a journal head 3 of hollow construction to receive and house a pair of pulleys, as an idler pulley 4 and a driven pulley 5, carried by the shaft 6 j ournalled in the head. The idler pulley 4 is loose upon the shaft 6, while the driven pulley 5 is fixed to the shaft. These pulleys are alternately engaged by a power transmitting belt 7, the belt being shifted by a belt shifter comprising a yoke or fork 8 straddling the belt and fixed upon the slide rod 9, the slide rod being supported in bearings integral with and extending from the head. The forward end of the slide rod is provided with a knob 10 for manually moving the yoke or fork to shift the belt from one pulley to the other. The body portion of the fork 8, at its lower side, is longitudinally grooved to engage about the upper edge of a wall 11 as a part of the head to sustain the fork against rotative movement.

The forward side of the head is inclined and longitudinally grooved to provide a dove-tailed wayfor a reciprocating slide bar 12, one wall of the groove being formed by gib plates 13 removably secured to the head. The slide bar 12 upon its lower side, is provided with a bearing block 14 engaged into a recess formed in the head affording clearance for reciprocating the slide, the bearing block being engaged by a stud 15 eccentrically extending from the forward end of the shaft 6, whereby the slide bar is reciprocated with the rotation of the shaft. The slide bar at its lower end carries a cutting tool 16 adjustably clamped thereto by a bolt 17 The tool is micrometrically adjusted by a set screw 18 engaged in a bearing block 19 fixed upon the slide, and the set screw is locked in its adjusted position by a lock screw 20 screw-threaded into the bearing block 19. The angular disposition of the slide results in the tool cutting through the work and forming an inclined or beveled edge, thus under-cutting the material while it is being trimmed to the appropriate outline.

The work operated upon by the cutter as shown in Figures 3 and 7 of the drawings, represents the heel portion 21 of an outer sole preferably after it has been secured to the heel seat of a lasted shoe upper 22. The outer sole at the heel portion being secured to the heel seat of the shoe or to the inturned edge or margin of the shoe upper and inner sole 23 by a row of tacks 24. The row of tacks are driven in a line following the heel contour of the upper, and thus form a pattern outline to which the heel portion of the outer sole is trimmed by the reciprocating cutter 16. In trimming the undersole, the shoe is held by the operator and presented to the machine by bringing and resting the margin of the heel portion of the outer sole on an anvil plate 25, having a knife edge 27 to engage between the outer sole and heel seat margin of the upper supporting the margin of the outer sole, and gauging the point at which the cutter 16 penetrates the outer sole, governed by the row of tacks which limit the depth of the anvil insertion between the outer sole and shoe upper. The tool reciprocates at a comparatively high rate of speed, producing a very sharp cut edge to the leather material out, and the The anvil is secured upon the upper end of a plunger rod 28 slidably supported in bearings extending from the body 2 which are bored to receive the rod. The lower end of the rod is pivotally connected to one end of a connecting link 29, with the opposite end of the connecting link pivotally connected to a foot treadle 3O pivoted to the base flange of the pedestal. This permits the operator to control or regulate the elevation of the anvil by depressing or releasing the treadle with his foot, and also permits the anvil to be lowered for inserting the work. The plunger is sustained against rotative movement by a pin 31 secured in the projecting bearings of the body, and engaged through an elongated slot 32 through the plunger rod. The anvil and plunger rod are limited in the upper movement by a pair of lock nuts33 screwthreaded upon the plunger and moving within a notch or recess in the bearings of the body. Thus the elevation to which the anvil can be raised can be very accurately regulated relative to the cutting edge of the reciprocat: ing cutter.

As illustrated, the head is adjustably mounted upon the body, being slidably engaged upon the top or table surface thereof, and adj ustably moved by a screw 34 threaded into the head and bearing into a bracket or lug 35 extending upwardly from the body 2. This provides for a micrometric adjustment of the head for bringing the cutting edge of the tool in proper relation to the forward edge of the anvil, regulating the distance for cutting from the guiding row of tacks and obtaining the desired heel seat margin between the cut edge of the outer sole and heel seat edge of the shoe upper. This result also can be obtained by making the anvil adjustable or interchanging it with other sizes although the method employed is preferable as it offers simplicity and rigidity in structure.

The work is further guided in relation to the cutter by a movable rest member 36 arranged to engage with the contour surface of the shoe upper below the anvil. The rest member is movably mounted so as to enable the operator to regulate the same at will while feeding the work to the cutter and structurally is formed with a vertically disposed shank portion having its upper end rounded or curved and slightly offset to obtain a line contact against the shoe surface. A line or edge contact facilitates in feeding or guiding the work more accurately to the contour of the shoe for cutting the work or outer sole correspondingly to such outline or shoe contour. The shank portion extends from and at an angle to a U-shaped body portion 37 which is slidably mounted upon the bearing extensions of the machine body 2 by screws 38 extending through an elongated slot in the rest body portion 37. The body is formed to provide a finger hold 39 enabling the rest member to be grasped by a finger of the operator and manipulated while holding the work to the action of the cutter. The degree of sliding movement of the rest member is governed or limited by a screw 40 fixed to themachine frame and extending througha cross .wall of the body portion of the rest member, the cross wall being between the head of the screw and a set nut 41. The rest member is sustained in a retracted position by a spring 42 connected with the rest member and machine frame.

Having described my invention, I claim:

1. In a machine for marginally trimming the heel portion of an outer sole after the outer sole is applied to the shoe upper, comprising, a head stock, a slide carrying a cutter tool mounted for reciprocation upon said head stock, means carried by the head stock for reciprocatin said slide, an anvil depressibly mounted %eneath the cutter against which the cutter operates for trimming the work supported upon the anvil, the anvil having an edge adapted to be tucked between the heel seat of the upper and outer sole and against'the fastening elements securing the sole to the upper for guiding the work during the trimming and thereby govern the line of trim, and adjustable stop means for limiting the elevation of the anvil relative to the cutting edge of the cutter.

2. In a machine for marginally trimming the heel portion of an outer sole after the outer sole is applied to the shoe upper, comprising, a head stock, a cutter tool mounted for reciprocation upon said head stock, means carried by the head stock for reciprocating said cutter, an anvil mounted beneath the cutter against which the cutter operates for trimming the Work supported upon the anvil, and a rest member mounted upon said head stock adapted to bear against the heel portion of the upper for guiding the work for correspondingly trimming the same to the contour of said upper heel portion, said rest member having an extension adjacent the shoe for manipulating the rest by the hand manipulating the shoe, whereby the rest is moved for varying the cutting pattern.

In witness whereof, I hereunto subscribe my name.

PEARL J. WENTWORTH.

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