US2017151A - Skiving machine - Google Patents

Description

Get. 15, 1935. G. HAZELTON ET AL SKIVING MACHINE Filed Jan. 29, 1934 2 Sheets-Sheet l Oct. 15, 1935 e. HAZELTON ET AL SKIVING MACHI NE Filed Jan. 29,1954 2 Sheets-Sheet 2 Patented Oct. 15, 1935 SKIVING MACHINE George Hazelton, Cyril Harry James, and William Isaac Bacon, Leicester, England, assignors to United Shoe Machinery Corporation, Paterson, N. J a corporation of New Jersey Application January 29, 1934, Serial No. 708,746 In Great Britain July 1, 1933 11 Claims.

This invention relatesto the manufacture of shoes and is illustrated as embodied in a skiving machine.

In application for United States Letters Patent Serial No. 703,730, filed Dec. 23, 1933, in our names, there is disclosed a shoe comprising a built-up Cuban heel the upper breast portion of which is provided with a laterally extending groove of suitable shape to receive a tapered rear end portion of a short outsole of the shoe. The tapered rear end portion of the sole positioned within the groove is compressed by the heel during the heelattaching operation, one or more heel-attaching nails being driven through such tapered portion to insure that the same is held securely within the groove. In preparing the rear end of the sole for reception in the groove in the heel it is desirable that the length of the taper or bevel on the sole should be substantially the same on all soles and substantially equal to the depth of the groove in the heel. It is also desirable that the beveled face of the tapered end of the sole should be on the flesh side of the sole which faces the bottom of the shoe in order that the rough surface of such beveled face may be hidden in the finished shoe.

The purpose of the present invention is to provide a machine by the use of which the margin of such a sole or other piece of work may be skived to a suitable taper. In accordance with one feature of the invention there is provided with a knife, a support constructed and arranged to be engaged by the heel portion of the inside of a shoe upper to which an outsole is attached, a plate constructed and arranged to be positioned between the shoe upper and the heel end of the outsole, means for causing relative movement of the support and the plate on one hand and the knife on the other hand to force the heel end of the outsole against the cutting edge of the knife preparatory to skiving the outsole, and mechanism for moving the knife in a predetermined path to skive the outsole. In the illustrated machine the shoe support is movable toward and away from the cutter, which is reciprocated in a predetermined rectilinear path, the plate being thrust between the end of the sole and the bottom of the shoe and being angularly adjustable about an axis which lies in the plane of cut of the knife. In performing the skiving operation the shoe is placed on the support, and the plate is caused to enter the space between the end of the sole and the bottom of the shoe, the support then being moved bodily toward the knife until the sole has contacted with the knife, after which the knife is actuated to skive the sole to a predetermined length. Be-

cause of this construction and arrangement of the parts and the fact that the final position of the sole depends upon its thickness, the same length of bevel is produced on all soles, the length of the bevel being substantially equal to the depth 5 of the transverse groove in the heel into which the beveled end of the sole is to fit, and the rough face of the skived end of the sole is completely hidden in the finished shoe.

This and other features of the invention includ- 10 ing certain details of construction and combinations of parts will be described as embodied in an illustrated machine and pointed out in the appended claims.

Referring to the drawings, 15

Fig. 1 is a side elevational view of the rear end of a shoe;

Fig. 2 shows a perspective view of the heel of the shoe illustrated in Fig. 1;

Fig. 3 is a perspective view of the rear portion of 20 the shoe illustrated in Fig. 1 with the heel removed;

Fig. 4 is a side elevation, partly in section, of the illustrated machine for skiving a sole to a predetermined length as illustrated in Figs. 1 and 3; 25 and Fig. 5 is a perspective view of portions of the machine illustrated in Fig. 4.

The illustrated machine is described with reference to trimming short outsoles 20 attached to shoes to a predetermined length by a beveling cut, in order to provide a tapered portion 24 of suitable shape to fit within a groove 26 (Fig. 2) formed in the breast of a built-up Cuban heel 28 when such heel is correctly positioned upon the shoe. The shoe illustrated in Figs. 1 and 2 is described in the above-mentioned application for United States Letters Patent Serial No. 703,730, filed December 23, 1933, which may be' referred to for a more 40 complete understanding of the shoe.

In order to prepare the outsole 20, which may also be referred to as the sole, for reception within the groove 26 it is not only desirable that the sole be trimmed to a predetermined length but 45 eration and are held in compressed relation there- 55 with by heel-attaching nails 30 which pass through the tapered portion 24.

It will be noted that in trimming the sole to a predetermined length by a beveling cut, material should be removed from the flesh or inner side of the sole 26 in order to insure that the rough surface formed by such cut shall not be visible in the finished shoe. Accordingly, the trimming cut is started at the outer or grain side 34 (Fig. 3) of the sole and progresses forwardly of the sole and toward the shoe upper.

In order to support the shoe during the sole beveling or skiving operation, the shoe is placed bottom side up upon a heel plate 36 (Fig. 4) which is pivotally mounted upon a threaded stem 38 screwed into an upstanding post 40. A pedestal 42 is bored slidingly to receive the post 40 and is provided with a horizontal extension 44 (Fig. 4) of suitable size to fit within a guideway 46 of a forwardly projecting portion of the main frame. The pedestal 42 may be conveniently moved along the guideway 46 to a forward loading position or to a rearward position such as shown in Fig. 4.

In order to support the short outsole 20, which is attached either by lines of stitches or cement to the shoe upper, rearwardly of the breast line.

48 (Fig. 3) of the sole, the machine is provided with a wedge-shaped plate 50 the forward end 52 (Fig. of which is thin to insure that there shall be a minimum amount of distortion of the sole rearwardly of the heel-breast line 48 when the plate 50 is inserted between the sole and the shoe upper. The sole-supporting surface of the plate 56 is serrated.

The plate 50 is pivotally supported for movement about an aXis 56 by a pair of trunnions 58 secured to side portions 60 of the plate 50, the trunnions being constructed and arranged for reception in correspondingly shaped recesses formed within depending arms 62 which are adjustably secured through mechanism, which will be described later, to the main frame of the machine.

The trimming cut is made by a cutter or knife 64 secured to a carrier 66 which is mounted for reciprocation along a guideway of a bearing block 68. The bearing block 68 may be initially adjusted transversely of the path of movement of the knife along a groove 10.

As above stated, it is desirable to form a tapered portion 24 of constant length regardless of the thickness of the sole being trimmed in order that such tapered portion shall not extend beyond the groove 26 which is of the same depth in various sizes of heels. With-this in view, before starting the skiving cut the plate 50 is normally permitted to swing about the axis 56 in a counter-clockwise direction under pressure of the shoe mounted upon the heel plate 36 in order to press the sole against the cutting edge 12 of the knife 64. The forward end 52 of the plate 50 is substantially in alinement with the axis 56 which lies in the path of movement of the knife 64, the arrangement being such that the knife just touches the end 52 as it passes by the same.

To raise the heel support 36 an arm 14, the forward end of which engages the lower end of the post 46 when the pedestal 42 is in operating position, is mounted for rocking movement about a pin 16 carried by the main frame. The arm may be conveniently operated through a rod 18 the upper end of which is pivotally connected to the rear end of the arm '14 and the bottom end of which is secured toa treadle-operated lever 8|].

The rod 18 includes a lower part 82 which operates the upper part of the rod 78 through a spring 84 in order that the shoe may not exert too great a pressure against the knife 64. The treadle 80 is normally held in a raised position by a spring 8|.

As the shoe arranged upon the heel plate 36, which together with other shoe-supporting members may be referred to .as a jack, is moved rearwardly into operating position, the sole-supporting plate 50 enters between the shoe and the rear portion of the sole. The position of the shoe with respect to the plate 50 may be determined by previously drawing a line across the outer surface of the sole and alining such line with the forward edge of the plate 56 or, if desirable, the machine may be provided with a backgage which is automatically set in accordance with the size of the heel. Such a back-gage is disclosed, for example, in United States Letters Patent No. 1,840,030, granted January 5, 1932.

In order to insure that the length of the tapered portion 24 of the sole is the same for various thicknesses of soles, the sole upon the plate 50 is swung against the cutting edge 12 of the knife which is normally held in a retracted position, by moving the heel plate 36 upwardly through the provision of the above-described mechanism.

When the operator steps upon the treadle 66, the post 40 is raised with a yielding pressure to cause the shoe mounted upon the heel plate 36 to be forced against the forward edge of the solesupporting plate 50, whereupon further upward movement of the post 40 causes the heel plate 36 to be tilted to swing up the heel end of the shoe until the sole engages the cutting edge 12 of the knife 64.

In order securely to hold the sole 26 against the trimming pressure of the knife 64, the machine is provided with a pair of holddowns 86 which force the sole against the serrated surface 54 of the plate'56. The holddowns 86 are secured to a bar 86 carried by arms 90 which are pivotally secured to the block 68. The holddowns 86 may be operated in timed relation with the sole-supporting plate 50 so that pressure will be brought to bear against the plate as the sole is moved into engagement with the cutting edge 12 of the knife 64. Such movement of the holddown 86 may be effected by a connecting link 92, the upper portion of which is pivotally secured to one of the arms 90 and the lower portion of which is yieldingly connected through a spring 94 to the treadle 80.

The knife 64 is operated by a hand lever 96 which is mounted upon a rod 98 carried by the main frame and which is connected through a link !00 to the knife carrier 66. The hand lever 96 is normally held in a rearward position against an adjustable stop I02 by a spring 404. Forward movement of the knife 64 is limited by engagement of the hand lever 96 with a plate 506 which is adjustably secured to the frame of the machine by a screw-and-slot connection [08.

The depending arms 62 which determine the position of the axis of rotation 56 about which the sole-supporting plate 50 is rocked are screwed to a T-shaped plate H0 constructed and arranged for vertical adjustment along a guideway N2 of the main frame, after releasing a screw I I4 which is in threaded relation with the machine frame and passes through an elongated slot H6 in the T-shaped plate H0. In order to insure that the depending arms 62 are not moved upwardly under pressure of the shoe, the T-shaped plate H0 is provided with a rearwardly extending flange H8 having a slot I20 formed therein. A screw I22, which is in threaded relation with the main frame, passes through the slot I20 and is provided with an enlarged head which is normally in engagement with the upper flange I l8. 7 i

In order to trim the short outsole 20 attached to the shoe 22 to a predetermined length by a beveling cut, the shoe is mounted upon the jack when the same has been moved to a forward loading position. The pedestal 42 is then slid rearwardly along the guideway 46 until the shoe is in operating position beneath the sole-engaging plate 50, the plate being swung in a counterclockwise direction as the jack is moved rearwardly and entering between the rear portion of the sole and the shoe upper. The operator determines the lengthwise position of the shoe in the machine by a previously formed mark upon the sole and alines the same with the forward edge of the plate 52. The operator next steps on the treadle 80 to cause the plate 50 to swing in a counterclockwise direction about the axis 56 until the sole engages the cutting edge 12 of the knife 64. The holddowns 86 in the meanwhile are moved downwardly 'so as to engage the sole just rearwardly of the forward edge 52 of the plate 50 thereby cooperating with the serrated surface 54 to prevent the sole from being moved forwardly under cutting pressure of the knife 64. The operator while holding the treadle 8B in a lowered position moves the hand lever 96 forwardly to cause the knife 64 to start its operating out at the grain side 34 of the sole and to move past the forward end 52 of the plate 50, thereby to form in the rear end of the sole a beveled surface which faces toward the shoe upper.

Having described the invention, what we claim as new and desire to secure by Letters Patent of the United States is:

.1. A skiving machine having, in combination, a support constructed and arranged to be engaged by the heel portion of the inside of a shoe upper to which an outsole is attached, a knife, a plate constructed and arranged to bepositioned between the shoe upper and the heel end of said outsole, means for causing relative movement of the support and plate on one hand and the knife on the other hand to force the heel end of the outsole against the cutting edge of the knife preparatory to skiving said outsole, and mechanism for moving the knife in a predetermined path to skive said outsole.

2. A skiving machine having, in combination, a knife mounted for movement, a support for a shoe upper to which an outsole is attached, a plate constructed and arranged to be positioned between the shoe upper and the rear portion of the outsole, said plate being mounted for movement to cause the outsole to engage the knife, and mechanism for operating the knife, after the outsole has been brought into engagement therewith, to skive the rear end of the same by a out which progresses forwardly of the sole and toward the shoe upper.

3. A skiving machine having, in combination, a cutter mounted for movement in a predetermined path, a support for a shoe upper provided with an outsole, a plate constructed and arranged to be positioned between the sole and the rear portion of the outsole, means for causing the plate to force the outside face of the outsole against the cutter, and mechanism for operating the cutter forwardly of the sole and toward the shoe upper thereby to trim the sole to a predetermined length and to skive material from the inner side of the rear end of the sole.

4. A skiving machine having, in combination,

a support constructed and arranged to be engaged by the heel portion of the inside of a shoe upper to-which an outsole is attached, a knife, a plate constructed and arranged to be positioned between the shoe upper and the heel end of said outsole, means for moving the support and the 10 plate relatively to the knife to force the heel end of the outsole against the cutting edge of the knife preparatory to skiving said outsole, means for clamping the heel end of the outsole against the plate, and mechanism for moving the knife in a predetermined path to skive said outsole.

5. A skiving machine having, in combination, a jack for supporting a work piece, a knife, a plate positioned between the jack and the knife, means for causing relative movement of the jack and the plate on the one hand and the knife on the other hand to force a portion of the work-piece which is in engagement with said plate against the knife preparatory to skiving the work-piece, and means for guiding the knife in a predetermined path to skive the work-piece.

6. A skiving machine having, in combination, a jack constructed and arranged to receive a shoe, a knife, a plate positioned between the jack and the knife and constructed and arranged to be engaged by the sole of the shoe, means for causing relative pivotal movement of the jack and the plate on the one hand and the knife on the other hand to force the sole in engagement with said plate against the knife preparatory to skiving the sole, and means for guiding the knife in a predetermined path to skive said sole.

7. A skiving machine having, in combination, a support constructed'and arranged for engagement with the heel portion of the inside of a shoe 40 which is provided with an outsole, a plate mounted for swinging movement and constructed and arranged to be positioned between the shoe and the rear portion of the outsole, a knife mounted for movement in a predetermined path, means for moving the support to cause the plate to swing thereby to force the outside face of the outsole against the knife, and means for moving the knife to trim the sole to a predetermined length and to skive the same.

8. A skiving machine having, in combination, a support constructed and arranged for engagement with the heel portion of an insole of a shoe to which an outsole is attached, a plate constructed and arranged for positioning between the shoe and the rear portion of the outsole, a knife mounted for movement in a predetermined path, means for causing the support to move the plate thereby to force the outer face of the outsole against the knife, a clamp for forcing the outsole against the plate, and means for moving the knife to trim the outsole to a predetermined length and to form a beveled surface which faces the shoe upper.

9. A skiving machine having, in combination, a support comprising a pivotally mounted member constructed and arranged for engagement with the heel portion of an insole of a shoe upper to which an outsole is attached, a plate mounted for pivotal movement and constructed and arranged to be positioned between the shoe upper and the rear portion of the outsole, a knife mounted for movement in a predetermined path, means for moving the support to swing said member relatively thereto for causing the plate to force the outside face of the outsole against the knife, and

a beveled surface which faces toward the shoe upper.

10. A skiving machine having, in combination, a jack comprising a pivotally mounted heel'plate for supporting a shoe upper having an outsole at tached thereto, a knife having an elongated cutting edge, a wedge-shaped plate constructed and arranged to be positioned between the shoe upper and the rear portion of the outsole, said wedgeshaped plate being mounted for movement about an axis, means for moving the jack to cause the heel plate to press the heel end of the shoe upper against the wedge-shaped plate thereby to move the plate about said axis until the sole engages the cutting edge of the knife, and means for moving the knife in a. predetermined path which passes substantially through said axis thereby to skive the sole to a predetermined length.

11. A skiving machine having, in combination, a knife, a support, a plate constructed and arranged for positioning between a shoe upper and GEORGE HAZELTON. CYRIL HARRY JAMES. WILLIAM ISAAC BACON.

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