US2437565A

US2437565A - Leather skiving device

Info

Publication number: US2437565A
Application number: US660390A
Authority: US
Inventors: Paul A Sergio
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-04-08
Filing date: 1946-04-08
Publication date: 1948-03-09
Anticipated expiration: 1965-03-09

Description

March 9, 1948. sERGlO 2,437,565

LEATHER SKIVING- DEVICE Filed April 8, 1946 3 Sheets-Sheet l ATTORNEKS.

March 9,1948. P, A SERGIO 2,437,565

LEATHER SKIVING DEVICE Filed April 8, 1946 3 Sheets-Sheet 2 INVENTOR 5y WWW March 9, 1948. r P. A. SERGIO 2,437,565

I LEATHER SKIVING DEVICE Filed April 8, 1946 3 Sheets-Sheet 3 IN VENTOI? Arron/wins Patented Mar. 9, 1948 UNI ED STATES PATENT OFFICE LEATHER SKIVING DEVICE Paul A. Sergio, South Bend, Ind.

Application April '8, 1946, Serial No. 660,390

16 Claims.

This invention relates to leather skiving devices, and more particularly to a device by means of which an edge or marginal portion of a piece of leather may be cut to tapered form.

Various constructions of devices for skiving and cutting leather have been developed heretofore. However, such prior devices have all had limitations with respect to their method of use and general utility. Among such limitations have been inability to work upon the leather soles of shoes and a requirement that the work piece be of small size and substantially flat contour. Furthermore, prior devices have not been capable of cutting contours other than plain tapers.

In the operation of half so'ling a shoe, the worn outer sole of the shoe, which usually constitutes a piece of leather extending the full length of the shoe, must be cut back of the worn portion, as at the forward part of the shank. The half sole which is to replace the worn sole portion thus removed is skived at the inner face of the rear portion thereof, and the front portion of the remainder of the outer sole is skived correspondingly at its outer face. The skived portions over- .lap in face engagement and are secured together when the half sole is applied to provide a lapped joint. It is .a simple matter to skive the half sole, either by hand or by skiving devices now available on the market, because of the favorable and workable properties and condition of the leather of a new half sole and because a half sole can be handled and manipulated easily. Skiving of the remnant of the outer sole of the shoe presents entirely different conditions and problems. Present machines are not capable of doing such work upon the leather constituting a part of a shoe. Hand skiving of such shoe sole portions is therefore necessary, and must be done under adverse conditions. The hardened and toughened condition of a well worn and weathered sole leather is one adverse factor and a curved contour of the sole crosswise of the shoe is .another adverse factor, the latter because it makes accurate and uniform cutting by hand very difficult. Also, trial and error methods of shaping the cut complementary to the skived portion of the half sole to be applied thereover are necessary because there is no cutting guide and a hand operation is inherently irregular and inaccurate. As a result of these conditions the lapped joints at the rear portions of the half soles applied to a pair of shoes are never uniform and the rear edge of the half sole is likely to be wavy or bulgy, so that gaps are left at the lapped joint.

The primary object of this invention is to provide a device which is capable of skiving, a tough, hard, weathered sole -portion accurately and uniformly whil it is attached to and forms a part of a shoe, whereby the above mentioned difficulties, limitations and defects of present practices are overcome.

A further object is to provide a device of this character which is capable of forming a stepped out of any selected depth and of forming a taper extending from the bottom of that stepped out.

A further object is to provide a device of this character which is simple in construction, inexpensive, easy to operate and to adjust, whose use does not require special skill, and which facilitates rapid skiving, accurately and uniformly, without regard to the hardness or toughness of the leather.

Other objects will be apparent from the description and appended claims.

In the drawings:

Fig. 1 is a view of the device in elevation illustrating its use to skive the outer sole attached to a shoe. 7

Fig. 2 is an elevational view of the device as seen from the left in Fig. 1.

Fig. 3.is atop plan view of :the device.

Fig. 4 is a fragmentary view of a shoe, illustrating its sole portion in cross-section, and skived to receive a half sole as seen in dotted lines.

Referring to the drawings, which illustrate the preferred embodiment .of the invention, the numeral I0 designates the base of a frame which mounts a standard illustrated as consisting of a plurality of vertical ribs I2. An integral journal block 14 is supported upon the standard. An upright portion l6 projects vertically above the block Id and mounts a forwardly projecting neck portion l8 which terminates .in a head 20..

A horizontal shaft is .journaled in the upper portion of the journal block 'I 4 andproj ects therefrom to mount a pinion or gear v212 and a crank 24. A horizontal stud is journaled intermediate the height of the block l4 and mounts a gear or pinion '26 which meshes with gear 22. .A third horizontal .shaft .28 is journaled in the lower portion of .block 14 with its opposite ends projecting from the block. One projecting end portion of shaft .28 mounts a gear or pinion 3B which meshes with the gear '28. The opposite end of said shaft mounts a cylindrical work feed member .32 having a circumferential groove .34,

adjacent its outer .e d and a longitudinally ribbed or serrated periphery as illustrated at 36.

A horizontal member 38 projects from the block l4 at approximately mid-height thereof. The member 38 has a bore extending transversely therethrough to receive a stud 48 which is fixedly clamped therein, as by a set screw or other clamping member 42. The stud 48 mounts a horizontal work table 44 which is positioned above and at one side of the cylindrical member 32 with its upper surface in a horizontal plane substantially tangent to the uppermost peripheral portion of the member32. The work table 44 has a groove 46 at its inner portion in vertical register with the groove 34 of member 32.

The head 28 of the frame has a vertical bore therein whose axis, if projected, would intersect the axis of the work feed member 32, and a shaft 48 is mounted in said bore forfree sliding guided movement. The shaft may have an elongated longitudinal passage 41 therethrough adjacent its upper end at the portion received in the head 28, and a cross pin 49 carried by the head 28 extends freely through said passage and prevents rotation of said shaft 48. A transverse plate 58 is fixed on the upper end of shaft 48 and has a bearing portion projecting therefrom against which bears a set screw 52 which is threaded in an ear 54 projecting from the head 28. A rigid member of inverted L-shape has a horizontal portion 56 fixedly secured to the lower end of shaft 48 and a vertical plate portion 58 extending adjacent one face of the journal block I4. A coil spring 68 encircles the shaft 48 with its opposite ends bearing against the bottom face of head 28 and against the top face of member 56, respectively, to normally urge the latter part downwardly to the limit permitted by the adiustment of the set screw 52. A stud shaft 62 is secured to the plate 58 and projects therefrom to detachably journal a cylindrical idler member 64 having an enlarged circumferential cutting edge portion 66 at its outer end. The shaft 62 is substantially parallel to shaft 28 and its axis intersects a projection of the axis of shaft 48. The cutting edge 66 registers with the groove 34 of the work feed member 32. i

A skiving blade 68 ismountedupon a blade carrier 18 having a rearwardly projecting arm 12 which is journaled on a stud 14 projecting horizontally from the block I4 at the side thereof opposite to the member 38. The blade carrier 18 has an upwardly projecting ear 16 at its outer or forward portion to which an upwardly projecting rigid link 18 is pivoted at 88. A horizontal stud 82 projects laterally from the member 56 and the upper end of the link 18 is pivotally connected thereto by means of a cambushing 84. The blade carrier 18 slidably and detachably mounts the skiving blade 68 and carries an ear 86 at its outer end in which is threaded a. set screw 88 bearing against the blade and serving to adjust its longitudinal position in the carrier.

The device is used to skive the front portion of the shank of the outer sole 98 of a shoe 92, which outer sole has been cut at the front portion of the instep or arch portion of the shoe rearwardly of the worn portion thereof. The shoe will have the usual inner sole 94 and a heel 96. The shoe is prepared for the skiving opera tion by loosening the outer sole 98 from the inner sole back substantially to the heel 96. This permits the loosened shank portion of the outer sole remaining after the worn sole portion has been cut away to be flexed as seen in Fig. 1, whereby, when the shoe is positioned with the heel portion uppermost and the sole portion facing the machine, the free end portion of the outer sole which is to be skived bears upon the work table 44 with one edge portion thereof bearing against the work feed member 32 and the cutting edge 66 of the member 64.

When the parts are so positioned, the device is operated by rotating the crank 24 to drive the shaft 28 and the work feed member 32 through the

gear train

22, 26, 38. As the work feed member 32 rotates, the lower face of the flexed outer sole is engaged by the serrations 36 of said member 32 to advance the sole laterally and between the

members

32 and 64. The member 64 is an idler, and the movement of the sole relative thereto and in engagement therewith causes rotation thereof and of the circumferential cutting portion 66. The member66 cuts a groove in the outer face of the shank portion of sole 68 whose bottom is parallel to and spaced from the outer or front transverse edge thereof. The blade 68 is so positioned that it cuts the sole diagonally in a plane extending from the bottom of the groove formed by cutter 66 to the inner face of the forward edge of the sole. The skived cut so formed is best illustrated in Fig. 4, and forms the shoulder or step 98 at the outer face portion of the sole and the tapered sole portion I88. This skived out forms a seat for a half sole as shown in dotted lines in Fig. 4, and permits a partial skiving only of the half sole so that an exposed feather edge on the half sole is not necessary and an edge abutment between the reduced thickness edge of the half sole and the shoulder 98 is provided. Consequently, weakening of the rear edge of the half sole is avoided. The uniformity of the skived cut of sole 88 assures a solid snu fit of the sole parts and an attractive, smooth joint between the half sole and the sole 98.

It will be observed that the blade 68 is automatically positioned in proper relation to the onter 66 by virtue of the link 18 connecting the blade carrier with the cutter carrier. Consequently, if the sole leather is tough so that cutter 66 cannot penetrate it to the full depth permitted by the setting of screw 52, i. e., if the spring 68 is compressed, the cutter blade 68 will be adjusted automatically to compensate for the condition encountered. For the purpose of adjusting the blade 68 accurately to form a out beginning at the bottom of the out or groove formed by cutter 86, the cam 84 may be rotated to raise or lower the front part of the blade carrier 78 and the blade 68 carried thereby.

Th device provides for regulation of the depth of the shoulder 98 cut in the sole, to accommodate for differences in the thickness of different shoe soles, for example, as between the soles of mens shoes and womens shoes or between the soles of dress shoes and heavy work shoes. The set screw 52 constitutes this adjusting means. Adjustment of this screw regulates the spacing of the cutter idler 64 and its cutter 66 from the Work feed member 32, Note that danger of blunting the edge of cutter 66 is avoided by the provision of the

grooves

34 and 46 which are of a size and depth to receive the cutter 66 with clearance in the event the idler 64 is lowered into engagement with the work table 44 and the work feed member 32.

The device has other advantageous features. All operating parts are accessible for adjustment. The cutter idler 66 and the cutter blade 68 are mounted for rapid and convenient removal, as for grinding and sharpening. The device is rugged and will perform satisfactorily under the most exacting conditions of use.

duced inother forms utilizing the same combina tion and arrangement of parts and falling within the spirit of the invention and the scope of the appended claims.

I claim:

1. A leather skiving device comprising a frame mounting a work support, a work feed roll rotatable on said frame and located below and at one side of said support, a rotatable cutter spaced above said feed roll, means for supporting said cutter, a skiving blade located opposite to said support for engagement by leather fed by said roll, a blade mounting carried by said frame, means for rotating said feed roll to advance leather from said support to and past said cutter and blade, means for adjusting said cutter supporting means to groove leather to the desired depth and means for adjusting said blade mounting to skive leather at a depth corresponding to the depth of said groove.

2. A leather skiving device comp-rising a frame mounting a work support, a work feed roll rotatable on said frame and located below and at one side of said support, a rotatable cutter spaced above said feed roll for cutting a groove in leather, means for supporting said cutter, a skiving blade located opposite to said support for engagement by the grooved leather fed by said roll, a blade mounting carried by said frame for positioning said blade to cut away a part of said leather at a depth determined by the depth of the groove therein, and means for rotating said feed roll, said cutter supporting means and blade carrier being resiliently supported,

3. A leather skiving device comprising a frame mounting a work support, a work feed roll rotatable on said frame and located below and at one side of said support, a rotatable grooving cutter spaced above said feed roll, means for supporting said cutter, a skiving blade located opposite to said support for engagement by leather fed by said roll, a blade mounting carried by said frame, and means for rotating said feed roll, and means for vertically adjusting said cutter supporting means and said blade carrier whereby one edge of said blade engages the workpiece at the bottom of the groove formed therein by said grooving cutter.

4. A leather skiving device comprising a frame mounting a work support, a work feed roll rotatable on said frame and located below and at one side of said support, a rotatable cutter spaced above said feed roll, means for supporting said cutter, a skiving blade located opposite to said support for engagement by leather fed by said roll, a blade mounting carried by said frame, and means for rotating said feed roll, said cutter supporting means and blade carrier being interconnected and adjustable means for positioning the same simultaneously.

5. A leather skiving device comprising a frame, a roll journaled on said frame, means for rotating said roll, a mounting adjustably carried by said frame, a circular grooving cutter journaled on said mounting adjacent to said roll, and a skivin blade carried by said mounting with its cutting edge adjacent and between said cutter and said roll and with one end of said cutting edge positioned to register with the tangent of the edge of said groove cutter in the plane of said Work.

6. A leather skivingdevice comprising a frame, a roll journaled on said frame, means for rotating said roll, a mounting adjustably carried by said frame, a circular groove cutter journaled on said mounting adjacent to said roll, and a skiving blade carried by said mounting with its cutting edge adjacent and between said cutter and said roll, and means for adjusting said blade on said mounting.

7. A leather skiving device comprising a frame, a roll journaled on said frame, means for rotating said roll, a mounting adjustably carried by said frame, a circular groove cutter journaled on said mounting adjacent to said roll, and a skiving blade carried by said mounting with its cutting edge adjacent and between said .cutter and said roll, and cam means for adjusting the vertical postion of said blade on said mounting relative to said cutter,

8. A leather skiving device comprising a frame, a roll journaled on said frame, means for rotating said roll, a mounting adjustably carried by said frame, a circular groove cutter journaled on said mounting adjacent to said roll, and a skiving blade carried by said mounting with its cutting edge adjacent and between said cutter and said roll, and spring pressed means supporting said mounting for vertical movement relative to said frame and said roll.

9. A leather skiving device comprising a frame, a roll journaled on said frame, means for rotating said roll, a mounting adjustably carried by said frame, a circular cutter journaled on said mounting adjacent to said roll, and a skiving blade carried by said mounting with its cutting edge adjacent and between said cutter and said roll, and means supporting said mounting for Vertical movement relative to said frame and said roll, means limiting downward movement of said mounting, and a spring urging said mounting downwardly.

10. A leather skiving device comprising a frame, a support depending from the upper end of said frame and shiftable vertically, a rotary groove cutter journaled at the lower end of said support with its axis horizontal, a feed roll journaled on said frame adjacent and below said cutter, a skiving blade, a blade carrier pivoted to said frame, and a link pivoted to the free end of said carrier and to said shiftable support at its opposite ends, said carrier positioning said blade alongside and between said roll and cutter.

11. A leather skiving device comprising a frame, a support depending from the upper end of said frame and shiftable vertically, a rotary cutter journaled at the lower end of said support with' its axis horizontal, a feed roll journaled on said frame adjacent to and below said cutter, a skiving blade, a blade carrier pivoted to said frame, and a link pivoted to the free end of said carrier and to said support at its opposite ends, said carrier positioning said blade alongside and between said roll and cutter, and means normally urging said support downwardly.

12. A leather skiving device comprising a frame, a support depending from the upper end of said frame and shiftable vertically, a rotary cutter journaled at the lower end of said support with its axis horizontal, a feed roll journaled on said frame adjacent to and below said cutter, a skiving blade, a blade carrier pivoted to said frame, and a link pivoted to the free end of said carrier and to said support at its opposite ends, said carrier positioning said blade alongside and between said roll and cutter, and cam means 00-- operating with said support and link to adjust the pivot axis of said link relative to said support.

13. A leather skiving device comprising a frame, a support depending from the upper end of said frame and shiftable vertically, a rotary cutter journaled at the lower end of said support with its axis horizontal, a feed roll journaled on said frame adjacent to and below said cutter, a skiving blade, a blade carrier pivoted to said frame, and a link pivoted to the free end of said carrier and to said support at its opposite ends, said carrier positioning said blade alongside and between said roll and cutter, and means for adjusting said blade endwise toward and from said cutter.

14. A leather skiving device comprising a frame, a support reciprocably mounted on said frame, a rotary groove cutter journaled on said support, work feed means including a roller journaled on said frame adjacent and parallel to said cutter, resilient means urging said support toward said roller, a blade carrier pivoted to said frame and connected to said support, and a blade mounted on said carrier and positioned to cut leather at an angle to and at the depth of the bottom of a groove therein formed by said cutter as it emerges from between said cutter and roller,

15. A leather skiving device comprising a frame, work supporting means carried by said frame and including a feed roller, a bodily shiftable support carried by said frame and spring pressed toward said roller, a rotary cutter journaled on said support and adapted to cut a groove in one face of a work piece on said supporting means, and a blade carried by said frame and by said shiftable support for slicing said work piece at an angle to and commencing at the bottom of said groove.

16. A leather skiving device comprising a. frame, work supporting mean carried by said frame and including a feed roller, a bodily shiftable support carried by said frame and spring pressed toward said roller, a rotary cutter journaled on said support and adapted to out a groove in one face of a work piece on said supporting means, and a blade unit shiftably connected to said frame and support for slicing said work piece from the bottom of said groove to provide the work piece with a tapered portion terminating at an abrupt shoulder.

PAUL A. SERGIO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,238,088 Baxter Aug. 28, 1917 1,488,470 Brogan Apr. 1, 1924 1,511,228 Lund 'Oct. 14, 1924 1,638,915 Bunker et al. Aug. 16, 1927