US2912843A

US2912843A - Skiving tool

Info

Publication number: US2912843A
Application number: US807137A
Authority: US
Inventors: Paul E Williams
Original assignee: LONNIE M GARY
Current assignee: LONNIE M GARY
Priority date: 1959-04-17
Filing date: 1959-04-17
Publication date: 1959-11-17
Anticipated expiration: 1976-11-17

Description

Nov. 17, 1959 P. E. WILLIAMS 2,912,843

. SKIVING I0OL Filed April 17, 1959 2 Sheets-Sheet l INVENTOR.

Nov. 17, 1959 P. E. WILLIAMS 2,912,843

SKIVING TOOL Filed April 17, 1959 2 Sheets-Sheet 2 INVIENTOR. @ML 6. BY S2 ATTORNEY United States Patent SKIVlNG TOOL Application April 17, 1959, Serial No. 807,137

Claims. (Cl. 69-20) This invention relates to hand-supported and manipulated, power-driven, cutting machines and more particularly to a hand-supported and manipulated power-driven, leather skiving machine.

In the conventional commercial processing and fabrication of leather goods, the cutting and skiving of the leather is usually effected on large, floor-mounted cutting and skiving machines. This normally necessitates the removal of the leather from the work table over to the skiving machine and back again to the work table. 1 Such machines are suitable only for large quantity production of skived sheets wherein each of a large number is skived in like fashion, but are unsuitable for the individual craftsman whose products vary in configuration one from the other so each must be skived in accordance with a different artistic configuration or design.

Such individualized skiving operations are presently effected with a simple knife or small skiving plane, similar to a carpenters plane, the effective use of each of which is very difiicult, requiring considerable skill and care, and the expenditure of an exorbitant amount of time.

It is an object of the present invention to provide a portable, hand-supported and manipulated, power-driven cutting and skiving tool by which an operator may quickly and simply skive leather and like materials regardless of the irregularity of the margin required thereon.

A further object of the invention is to provide a portable, power-operated, leather skiving tool that is light in weight, efiicient in operation, and simple and durable in construction.

A more specific object is to provide a hand-manipulated, skiving tool having adjustable guides so arranged that margins of the stock can be levelled accurately at preselected angles to the plane of the stock.

Briefly, the foregoing objects are accomplished by the provision of a portable power-operated skiving tool in cluding a power-driven, reciprocating skiving blade and coating guide plate, both of which are mounted on a casing which functions as a handle and contains a motor which effects the reciprocation of theskiving blade, for example, a casing and motor such as used in conventional electric hair clippers. The guide plate or surface is adjustable angled and in face to face spaced relation to the skiving blade in a predetermined manner whereby the leather may be fed into the blade at the proper angle and depth for skiving purposes. An adjustable guide or hold-down bar may be provided at the forward edge of the guide surface to retain the leather relatively firmly against such surface as the leather is being fed into the blade. With this construction, a portable, light-weight, electric-powered, hand skiving tool is provided that may be easily manipulated to skive efiiciently and rapidly substantially any shape margin that may be required.

Other objects and advantages of the invention will become apparent from the following description taken in conjunction with the drawings, in which:

- Fig. 1 is an exploded perspective view of a hand ice 2 skiving tool of the present invention, andshowing the relative position of the parts thereof prior to assembly;

Fig. 2 is a perspective view of the tool shown in 'Fig. 1, but showing the parts assembled; I

Fig. 3 is a right side elevation of the guide plate, when viewed from the front or left in Fig. 1; s

Fig. 4 is a front elevation of the guide plate shown in Fig. 3, and showing the coating cuttingblade in normal skiving position thereabove;

Fig. 5 is a left side elevation of the guide plate shown in Fig. 3; g i v Fig. 6 is a front elevation view of theguide bar;

Fig. 7 is a top plan view of the skiving blade; and d Fig. 8 is a modification of the guide bar shown in Fig. 6.

Although the invention is shown and described herein as being used for skiving and cutting leather, it will be understood that it may be employed for skiving and'cutting any type .of resilient orpliable material such as rubber, cloth, cardboard, and other elastomeric materials, etc.

Referring to Fig. 1, there is shown a conventional combined handle and motor casing 10 of thetype commonly used in electric hair clippers, such, for example, as illustrated in the United States Patent No. 2,265,880, issued December 4, 1941.. The casing 10 functions as a handle for the skiving mechanism, later to be described. The casing 10 contains the usual power-operated means in the form of an electric motor 11 which, in the illustrative example, is ofv the vibratingtype. The motor is connected to the driving tongue or tang 12 and functions in the normal manner to reciprocate the tang 12 transversely with respect to the casing 10. Suitable means may be provided in the casing 10 for varying the stroke of the tang 12, such means forming 'no part ofthe present invention. I i

Secured to the forward or driving end of the casing 10 is a means for reciprocablysupporting a blade carrier 13 which is mounted for reciprocation endwise ina sta-.

tionary support or base plate 14, having a groove or slot 16 facing the casing and configured to receive the base portion 18 of the blade carrier 13.. The base plate 14 may be secured to the casing 10 by any suitable means as, for example, the bolts 22 which are passed through the apertures 23 in the plate and are reeeivedin the respective threaded apertures 24 in the casing 10. The blade carrier 13 contains a longitudinal groove or slot 26 configured to receive the tang 12 in driving relation therein for reciprocating the carrier 13 endwise. The blade carrier 13 includes a blade holding portion 27 which extends endwise of the path of reciprocation and transversely or laterally of the casing 10. Areplaceable cutting or skiving blade 28 having a cutting edge 29 is detachably secured to the blade holding portion 27 of the carrier 13 by means of the screws30 which pass through the apertures 31 in the blade and thence into the respective threaded apertures in the studs 32. Although the cutting means is shown and described herein as the blade carrier 13 including its replaceable blade 28, it

will be understood that such cutting means may be a single one-piece blade extending transversely of the casing 10 and having a base portion with a slot adapted to receive the tang 12 in the manner aforedescribed. Any suitable type of blade may be used, saw-tooth or otherwise, depending on the material to be cut or skived.

Additionally, although the blade 28 shown herein has the configuration of a trapezoid, any suitable configured blade may be employed that will adequately skive or cut the leather.

Extending outwardly from the base plate 14 is a guide plate 40 which functions to support and guide. the leather at a proper position flatwise, and at a proper angle endwise, of blade 28 for skiving purposes. The guide plate contains a pair of apertured, spaced

mounting lugs

42 and 43 at one side and which are receivable in undercut portions 45 and 46, respectively, of the base plate 14. The lugs are hingedly secured to the base plate 14 by means of the

retaining bolts

48 and 49, respectively. The top surface 50 of the guide plate 40 slopes downwardly and laterally outwardly from the handle, and thus outwardly laterally of the cutting path, thereby forming an angle a with the blade '28, as shown in Fig. 4. Such angle a may be adjusted by rotating the guide plate 40 about its hinged mounting aforedescribed to a preselected angle with respect to the blade and retained at such angle by tightening a set screw 53 which passes through the aperture 54 and bears against the surface 55 of the undercut portion 46. With this construction, the skiving angle may be adjusted to provide any preselected slope of the skived margin as the particular design in question requires. Thus, the guide plate underlies the blade in spaced face to face relation thereto with the guide surface 50 of the plate being exposed toward the blade and diverging therefrom endwise of the cutting edge.

To facilitate the passage of the leather over the guide plate 40 after the leather passes the cutting edge 29 of the blade 28 in the direction of travel, the rear portion 56 of the surface 51} is sloped downwardly rearwardly and laterally in the manner shown in Figs. 1 and 3.

Although the base plate 14 and the guide plate 40 are shown and described herein as separate components, it will be understood that such base plate and guide plate may be formed as a one-piece structure.

When leather is being cut or skived by the aforedescribed mechanism, it is essential that the leather be retained firmly against the surface 50 as it is being fed into the reciprocating blade 28. To this end, a guide member or hold-down bar 58 may be provided which is adjustably secured to the side 60 of the base plate as, for example, by the screws 62 and 63 passing through the

elongated slots

65 and 66, respectively, in the guide bar and into the respective apertures 68 and 69 in the base plate side 60. The hold-down portion 70 of the guide bar 58 is configured to provide a straight-line contact with the upwardly exposed surface 50 of the leather supported on the surface in a direction endwise of the blade.

The plate 40 extends forwardly from the forward surface 60 of the base plate 14 a distance represented by the letter d (Fig. 5) to enable such contact.

In practice, the leather is placed between the holddown portion 70 and the surface 50, with the portion 70 being spaced from the surface 50 a distance slightly greater than the thickness of the leather.

An alternate form of hold-down bar is shown in Fig. 7 wherein the hold-down portion 72 thereof includes a roller 73 rotatively mounted in the portion 72 longitudinally of the bar, as shown, whereby the roller is adapted to hold the leather down on the surface 50 in the manner aforedescribed.

Thus, an efiicient, light-weight, portable, hand-supported, power-operated leather skiving tool is provided which may be employed by an inexperienced operator to accurately skive leather and like materials of any conventional size and to any suitable configuration regardless of the irregularity of the margin requirements thereon.

The terms and expressions which have been employed are used as terms of description, and not of limitation, and there is no intention, in the use of such terms and expressions, of excluding any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claimed.

Having thus described my' invention, I claim:

1. A hand skiving tool for skiving and cutting materials and comprising a handle configured to be grasped manually for manipulating the tool, a cutter blade, means carried by the handle and supporting the blade for reciprocation, power-operated means disposed in said handle and drivingly connected to the blade for reciprocating the blade, and a guide plate carried by said handle and underlying said blade in spaced relation thereto and having a guide surface exposed toward the blade and diverging therefrom endwise of the cutting edge for guiding the materials into engagement with the blade at a predetermined angle, endwise of the blade, to enable the blade to skive the materials.

2. A hand skiving tool for skiving and cutting leather comprising a generally elongated handle configured to be grasped manually for manipulating the tool, a cutting blade, means carried by the handle and supporting the blade substantially at one end of the handle for reciprocation transversely of the handle whereby a portion of the blade extends substantially laterally outwardly from One side of the handle, power-operated means disposed in said handle and drivingly connected to the blade for reciprocating the blade, and a guide plate secured to said handle and having a guide surface underlying said portion of the blade in spaced relation thereto and with the guide surface exposed toward said portion of the blade and diverging therefrom endwise of the cutting edge for guiding the materials into said portion of the blade at a predetermined angle, endwise of the blade, to enable the blade to skive the leather.

3. A hand skiving tool constructed in accordance with claim 2 wherein said guide surface diverges laterally of said portion of the blade in a direction toward the other end of the handle, said divergence commencing substantially adjacent said cutting edge of the blade.

4. A hand skiving tool constructed in accordance with claim 2 and including a guide member spaced from the guide surface and disposed adjacent said cutting edge in a direction outwardly of the one end of the handle for holding the leather against the guide surface.

5. A hand skiving tool constructed in accordance with claim 4 wherein adjusting means are provided to enable selective adjustment of the spacing of the guide member from the guide surface.

6. A hand skiving tool constructed in accordance with claim 2 wherein adjusting means are provided for adjusting the degree of divergence of the guide surface with respect to said portion of the blade.

7. A hand skiving tool for skiving and cutting leather comprising a generally elongated handle configured to be grasped manually for manipulating the tool, a base plate mounted substantially at one end of the handle, said base plate having a groove formed in its surface facing said one end of the handle and extending transversely of the handle, a cutter blade mounted for reciprocation in said groove and having a portion extending laterally outwardly from one side of the handle, poweroperated means disposed in said handle and connected to the blade for reciprocating the blade, and a guide plate secured to said base plate and having a guide surface underlying said portion of the blade in spaced relation thereto and with the guide surface exposed toward said portion of the blade and diverging therefrom endwise of the cutting edge for guiding the leather into said portion of the blade at a predetermined angle to enable the blade to skive the leather.

8. A hand skiving tool constructed in accordance with claim 7 wherein said guide plate is adjustably hinged to said base plate for adjusting the degree of divergence of the guide surface with respect to said portion of the blade.

9. A hand skiving tool for skiving and cutting leather comprising a generally elongated handle configured to be grasped manually for manipulating the tool, a base plate mounted at one end of the handle, said base plate having a groove formed in its surface facing said one end of the handle and extending transversely of the handle, a cutter blade holder mounted for reciprocation in said groove and having a portion extending laterally outwardly from one side of the handle, a cutter blade detachably secured to said portion of the holder, power-operated means disposed in said handle and connected to the holder for reciprocating the holder, and a guide plate adjustably secured to said base plate and having a guide surface underlying said blade and said portion of the holder in spaced relation thereto and with the guide surface exposed toward said blade and diverging therefrom endwise of the cutting edge for guiding the leather into said blade at a predetermined angle endwise of the blade to enable the blade to skive the leather.

10. A hand skiving tool constructed in accordance with claim 9 wherein said blade is adjustably secured to the portion of the holder to enable the cutting edge of the blade to be selectively spaced from and angled with respect to the guide surface.

References Cited in the file of this patent UNITED STATES PATENTS 615,935 Weston Dec. 13, 1898 745,591 Furber Dec. 1, 1903 1,254,990 Daley Jan. 29, 1918 1,775,666 Borione Sept. 16, 1930 1,797,979 Griffith Mar. 24, 1931 1,810,152 Volz June 16, 1931 1,964,829 Peterson et al. July 3, 1934 2,265,880 Wahl Dec. 9, 1941 2,640,261 Wahl June 2, 1953 UNITED STATES PATENT CERTIFICATE OF OFFICE CORRECTION November 17 1959 Paul E., Williams It is hereby certified th at error appears in the printed specification of the above numbered patent r quiring correction and that the said Letters Patent should read as corrected below.

Column 1,, line 52 for "coating" 57 for "adjustable" read eoaeting for "coating" read read adjustably eolumn 2 line 8;

coasting Signed and sealed this 30th day of August 1960 (SEAL) Attest:

ERNEST W.; SWIDER ROBERT C. WATSON" Attesting Officer Commissioner of Patents