US1169060A

US1169060A - Skiving-machine.

Info

Publication number: US1169060A
Application number: US79893513A
Authority: US
Inventors: Alexander M Alexander
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1913-11-03
Filing date: 1913-11-03
Publication date: 1916-01-18
Anticipated expiration: 1933-01-18

Description

A. M. ALEXANDER.

SKIVING MACHINE.

APPLICATION FILED NOV. s. 1913.

1,169,660. Patented Jan. 18, 1916.

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A. M. ALEXANDER.

SKIVING MACHINEx APPLICATION FILED NOV. 3. 1913.

1,169,060. I Patented Jan.18, 1916.

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A. M. ALEXANDER.

SKIVING MACHINE.

APPLICATION FILED NOV. 3, 1913.

1,169,060, Patented Jan. 18, 1916.

4 SHEETSSHEET 3.

THE COLUMBIA PMNOGRAPH c0.. WASHINGTON, D. c.

A. M. ALEXANDER.

SKIVING MACHINE. APPLICATION FILED NOV. 3, 1913.

Patented Jim. 1916.

4 SHEETS-SHEET 4 Mnesses fi/ai $5 76%. 777% THE COLUMBIA PLANOGRAPH CD-, WASHINGTON, D. C.

STES Penn ALEXANDER IVL ALEXANDER, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SKIVING-MAGHINE.

Specification of Letters Patent.

Application filed November 3, 1913. Serial No. 798,935.

0 all whom. it may concern Be it known that I, ALEXANDER M. ALEX- moan, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Skiving-Machines; and I do hereby declarethe following to be a full, clear, and exact de scription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates toskiving machines adapted for skiving the edges of leather for use in the manufacture of boots and shoes, or for skiving the edges of other materials for use in various arts.

The object of the invention is to provide a machine having, a novel and improved construction which will enable the work to be more accurately and rapidly done than heretofore and with less skill and care on the part of the operator and with less danger of injury to the work or to the operator.

The machine within which the invention has been embodied comprises a cylindrical skiving knife, :1 work supporting feed roll which is arranged in fixed positionbelow the knife and the position of which, -with relation to the knife, determines the angle and depth of the skiving, a yielding presser which holds the work against the periphery of the feed roll directly in front of the knife edge, an edge gage for guiding the work and a feed disk which cotiperates with the end of the feed roll in feeding the work and also acts as a guard between the knife and the work.

In machines in which the work is presented to the skiving knife by a fixed feed roll and a cooperating presser, it is important to the successful operation of the machine that the edge of the knife travel close to the presser and over the center of the roll and that there be proper clearance for the passage of the work between the periphery of the roll and that part of the knife directly back of its cutting edge. These conditions are secured in accordance with one feature of the present invention by the use of at cylindrical knife mounted to turn about an axis which. is upwardly inclined in the direction of the feed. This not only enables the edge of the knife to travel in the plane passing through the axis of the-roll andclose to the presser, but also enables the properclearupon the work .roll, )resser foot and feed disk ance tobe secured back of the cutting edge, even when the bevel of the knife edge is ground on the outsideof the knife.

"In accordance with another feature of the lnvent-lon, variation in the angle of the ,skiving is secured by adjustment of the feed roll transversely of the line of feed and provision is made for simultaneous adjustment of the presser,edge gage and feed disk so that the relation of these parts to each other .is not disturbed by adjustments to securethe ClGSlIGfl angle of sklving. Provision is also made for independent adjustment of the edge gage and presser with relationto the feed roll to vary the thickness of-the skived edge of the work.

The invention also includes a novel construction of feed roll which enables a roll to be readily removed and replaced by another of different size, or better suited to the work to be performed.

The invention also includes a novel chip ejector for discharging skivings from the interior of the knife and also various other features which are hereinafter described and set forth in the claims.

The various features of the invention will be readily understood from an inspection of the accompanying drawings and the following detailed description of the machine shown therein.

In the drawings, Figure 1 is a front elevation of the machine embodying the features of the invention in their preferred form;

.means for securing it to the'feed shaft; Fig.

3 is a left endelevation, partly in section, on a somewhat larger scale than Fig. 1; Fig. 4 is a plan view; Fig. 5 is a partial front elevation showing the parts which act directly Fig. 6 is a detailed sectional elevation through the aXis of the knife; Figs. 7 and 8 are detailed sectional elevations showing the manner in which the feed present the edge of the work of the knife; Fig. 9 is a detailed endelevation of the presser foot and Fig. 10 isa plan view of the presser'foot and edge gage.

In the machine shown in the drawings, the work is supported and fed to a cylindrical skiving knife 1 by a feed roll '2 arranged be- "low the knife and having a curved periphery correspond ng to the curvature of the 7 arranged to travel over the center of the feed roll and the knife is mounted to rotate about an axis which is inclined upwardly in the direction of the feed, so that there is adequate clearance between the periphery of the roll and the beveled surface directly back of the cutting edge of the knife. The feed roll is provided with a cylindrical end portion smaller in diameter than the curved portion which cooperates with the knife edge and a feed disk 3 is arranged to cooperate with the cylindrical end of the roll in feeding the work. The edge portion of the work which is to be skived is pressed uniformly against the fed roll directly in front of the knife edge by a presser foot 4 which is mounted to yield bodily to accommodate itself to the thickness of thestock and to yield angularly to accommodate itself to stock, the edge portion of which is more or less beveled or of uneven thickness. The work is guided by an edge gage 5 against which the edge of the stock travels as it is fed against the knife edge.

In the construction shown, the knife 1 is in the form of a thin metal blade fitting within a cylindrical knife support 6 and secured to a carrier '7. The knife support 6 is secured to the flange 8 of a hollow shaft 9. by a series of bolts 10 which also project through holes in the carrier 7 and hold it against rotation with relation to the knife holder. The hub of the carrier 1 is threaded to engage a screw thread formed on the head 11 of a sleeve 12 which passes through the hollow shaft 9. A clamping disk 13 is mounted on the end of the head 11 and its outer edge fits within the knife blade 1. The clamping disk may be sprung inward so that its edge presses against the "knife and clamps it against the holder 6 by a flanged plate 14 secured to the end of a rod 15 which passes through the sleeve 12. During the running of the machine, the parts described are clamped together and rotated as one piece. The knife carrying shaft 9 is mounted in a rearwardly inclined bearing bushing 16 which is secured in a vertically adjustable head 17 The head is guided in vertical ways 18 and may be ad-.- justed vertically by an adjusting screw 19 to bring the lower edge of the knife in proper position with relation to the feed roll 2.

The knife is continuously driven during the operation of the machine through a pulley '20 which is keyed on the rear end of the sleeve 12. The front end "of the bore in the 'hub 21 of the pulley is provided with a conical surface 24 which is adapted to engage a similar surface on the rear end of the shaft 9. The hub 21 of the pulley is engaged "by the hub 22 of a hand wheel 23 which is :screwed on the rear end of the rod 15 and serves to draw the plate 14 against the the driving shaft 32.

against rotation by passing a pin through '2 the hole 25 in the casing 26 which surrounds the knife support and into a hole 27 formed in the knife support. The hand wheel 23 is then turned to release the plate 14 and clamping disk 13 and to free the hub of the pulley 20 from the endof the shaft 9. The pulley 20 is then turned to 1'0- "tate the sleeve 12 and screw threaded head 11 and thus move the knife carrier 7 to bring the edge of the knife into the proper position. The hand wheel 23 is thenturned to clamp the parts'firmly in adjusted position and reconnect the pulley 20 with the end of the shaft 9.

The pulley 20 is driven through a belt 28 which passes about the pulley, over guide pulleys 29 and 30 and about a pulley 31 on The guiding pulley 30 is mounted upon aneccentric which may be adjusted by a lever 33 to keep the belt under proper tension.

The Work supporting feed roll 2, in the construction shown, comprises a comparatively thin metal shell provided with a conical bore 34 which fits the conical periphery of aflange or head 35 formed on the feed. roll shaft 36. I The outer end of the feed roll is provided with a recess 37 which is larger in diameter than the bore 34 so that a shoulder is formed at the outer end of the bore. The roll is forced onto the conical head 35 so that it is firmly clamped to the shaft by a securing plate 38-f1tting within the recess 37 and forced toward the end of the head 35 by a screw 39. Then the roll is to be removed, the screw 39 is removed and the taper on the head 35 is such that the roll may be readily removed from the end of the shaft.

This construction not only enables the rolls to be readily removed and replaced, but also enables rolls of different widths to be secured to the end of the shaft in proper relation to the knife and feed disk.

The roll carrying shaft 36 is mounted in the inclined bearings 40 and may be moved longitudinally to adjust the feed roll laterally and thus vary the angle between the periphery of the roll and the edge of the knife, and consequently the angle of the skiving. As shown, the shaft is thus ad justed through a shaft 41, the outer end of which carries a wheel 42 and the inner end of which carries a pinion 43 engaging a rack formed on a block 44 which is mounted the shaft 36 between the two collars45,

The feed, roll shaft driven :Eriii'the dr ting shaft 32" thfbi l gli a) shaft A6, one end (if which is connected with" the drivingshaft through a' wormf fland worin' wheel a8, and

shaft 86' through spiral gears 49.

The feed disk 3 is secured "to the lower 'end of thehub50 of the worm wheel 51 which is mounted" to" turn in a be'aring block 52 formed on the frohtend of a rock sleev'e 53 which is mounted in bearings formedin a supporting a'rni'54c. The" worm wheel 51 is eiig'aged by a worm secured to'the front end of the slia ft56 which passes through the rock sleeve and has a" pulley 57 secured to its rearen'd. The shaft is continuously driven by a belt '57 passing over the pulley 5'? and over a pulley formed on the hub '21 of the pulley 20. The rock sleeve 53 is forced in a direction to press'thefe'ed disk against the feed roll by a spring 58 mounted in an annular recess formed in a'col'lar 59 which is clamped to the rock sleeve 53.

One end of the spring 58 bears against a pin carried by the collar 59 and the other end bears against a pin carried by a disk 60 which is loosely mounted on the rock sleeve and is held in adjusted position by a spring latch 61 which engages a fixed ratchet wheel 62. loosely mounted on the rock held in fixed positionby a holdingscrew 63. By adjusting the" disk 60 about the ratchet wheel 62, the tension onzthe spring 58 may be adjusted so that the feed disk will be applied to the work with proper ressure The movement of the feed disk under the influence of the spring is limited by a stop arm 64' which projects from the collar 59 into position to engage the arm 54.

In order that the feed roll may be adjusted to vary the angle of the skiving without disturbing the relation betweenthe feed roll and feed disk, the arm 54: which supports the feed disk is. pivotally supported and is so connected with the mechanism for adjusting the feed roll laterally that the teed roll and feed disk are moved in unison when the feed roll is adjusted. As shown, the rear end of the supporting arm 5% is supported by a vertical'pivot bolt 65 which is mounted to turn in a bearing 66 formed on an arm 67 which projects from the cutter carrying head 17. The arm 5% is swung about its pivotal support through a link 68, one end of which is connected by a universal joint with the arm 5% and the other end of which is connected by a universal oint with a rod (39 mounted to slide in the frame of the machine. The rod 69Lcarries a pin 70 engaging a pivot block 71 which is mounted to slide between the ribs 72 formed on a lever 73, the lower end of which is connected withthe block at byga pin and pivot block 74; Through these-connections the arm 54:

sleeve and is The ratchet wheel is eenagers feed disk is moved a maintain the feed disk iii-fixed relation to the feed roll when the feed roll is adjusted to vary the angle of theskivin'g; The feed disk may correspond to, the curvature of the kniite edge and of the feedroll. The presser foot ispiovided"with a shank 76 by which it is pi'rotalljyc'onnected to the low end of supporting arm 77 so that the foot may turn to vary its angular relation to the surface of the feed roll in accordance with the character of the material being operated upon. The resser foot is held'yieldingly in positien wi'th its work engaging face parallel to the'edge'ofthe knife by a spring-pressed plunger 78 which is mounted in a recess in the ari'n 7'7 and bears against the" shank 76.

The normal position of the presser foot with relation to the knife edge is determined by a stop shoulder 79' on-tho shank of the presser toot which is arranged to engagea stop surface 80 onthe arm 77. The arm 77 is cured to apivot-pin 81 which is mounted in the lower end of a vertically movable slide 7.

8-2 The slide 82 is mounted in a recess formed'in the front plate 83 of a guard 84: which is hinged to the knife casing 26 and overlies and protects the greater part of the l-mife edge. an upwardly extending rod 85 which passes up through a hearing 86 and is surrounded by a spring '87 interposed between the lower end of the bearing 86 and the slide 82 so that it holds the slide yieldingly in its lowered position. The normal position of the slide determined by the adjustable nuts 88 screwed onto the upper end of the rod 85 and arranged to engage the upper end of the bearing 86. The springpressed slide 82 tlius'su'pports the presser foot so that it may yield bodily upward in accordance with the thickness of the stock passing between it and the feed roll.- The pivotal support for the arm 77 enables the presser foot to be adjusted laterallyin accordance with the position oithe feed roll 2 or to cooperate with any part of the curved portion of the periphery of the roll. The axis of the pivotal support is preferably arranged in the aXis of the knife so that the parallel relation between the work engaging face of the presser foot and the knife edge is not disturbed by the I lateral adjustment of the presser foot.

The slide 82 is provided with The edge guide 5 is in the forino'r' a finger projecting upwardly from the end of a curved arm 89, the lower end of which is provided with a rearwardly projecting bracket 91 and slotted to straddle the clamping screw 92. The curvature of the arm 89 is substantially the same as the curvature of the feed roll and the free end of the arm is arranged to lie close to the periphery of the feed roll, as indicated in either Fig. 7 or Fig. '8. In this construction, the supports ,for the edge gage are arranged so that they I leave a free and unobstructed space at the right of the edge gage, thus permitting the work to swing freely around the edge gage. -This enables the edges of the stock having sharp, reentrant angles to be accurately and uniformly skived without requiring the special and careful manipulation of the stock necessary in machines in which the free swing of the work about the edge gage is obstructed.

It is desirable that the edge gage should be located close to the cutting edge of the knife, and it is also important that the presser foot should hold the stock against the feed roll at its edge. It is also desirable that the presser foot should be adjusted laterally with the edge gage when the gage is adjusted with the feed roll or relative to the feed roll. In order to secure these results, the presser foot is provided near its end with a slot, or recess 93 which embraces the edge gage 5. The part of the presser foot which isiadjacent to the edge. gage is also extended rearwardly and curved upwardly, as indicated-at 94: in Fig. 9, to overlie the edge of the knife. This enables the edge gage to be brought close up to the edge of the knife and also holds the extreme edge of the stock in position to be accurately directed and fed against the edge of the knife.

' In order that the position of the edge gage with relation tothe work supporting part of the feed roll mav be varied in accordance with the character of the skiving, the bracket 91, which carries the edge gage, is provided with a segmental rib 95 on its rear side, which engages a curved guideway 96 formed on the support 97. The curvature of the guideway 96 corresponds to the curvature of the knife edge and of the periphery of the feed roll so that the edge gage follows the periphery of the feed roll as it is adjusted, for instance, from the position indicated in Fig. 7 to the position indicated in Fig. 8.

The bracket 91 is secured in adjusted position by a clamping screw 98.

In order that the edge gage and presser foot may move with the feed roll 2'as it is adjusted to vary the angle of the skiving, the support 97, upon which the edge gage is mounted, is connected to move with the feed roll shaft when it is moved longitudinally. As shown, the support 97 is mounted upon a cylindrical projection 99 formed on the bearing 40 and is provided with a bore 100 beyond the end of the projection 99 which fits about the shaft 36. The support is congrinding wheel into or out of nected to move with the shaft by a collar 101 which is secured to the shaft in position to maintain the end of the support in engagement with the head 35 on the shaft. The support is held from rotation with the shaft by a securing screw 102, the end of which is arranged to enter a slot 103 formed in the cylindrical projection 99. This, screw also acts as a clamping screw for holding the shaft in position after it has been adjusted longitudinally to bring the feed roll into the desired position with relation to the knife.

The skivings or chips removed from the edge of the stock by the skiving knife are discharged or ejected from the interior of the knife by an ejector roll 104 which is mounted to turn about an axis inclined to the direction of travel of the interior surface of the knife. The roll is preferably provided with a substantially cylindrical portion 105 arranged to lie close to the inner surface of the knife and with a conical front portion 106 under which the chipsor skivings may readily pass and which will direct them to the cylindrical portion of the roll. As shown, the roll is mounted on the inner end of a lever 107 which is pivoted to the guard 84 and is held in normal position by a spring 108. chips'or ski'vings which are carried around inside of the knife pass between the inner surface of the knife and the roll 105 and cause the roll to turn. upon its axis. Since the roll is arranged to turn about an aXis which is inclined to the direction of the travel of the knife, its rotation will throw the chips forward and discharge them through the open end of the knife.

In order that the knife may be conveniently sharpened as required, the machine is provided with a grinding wheel 109 which may be moved into or out of engagement with the knife. The grinding wheel is secured upon the lower end of the shaft 110 which is mounted in one arm of a lever 111. The other arm of the lever carries a pin 112 which engages a radial slot formed in an arm 113 which is secured to the inner end of a rock shaft 114. The outer end of the rock shaft carries a hand wheel 115 by which the operator may rock the shaft to throw the engagement with the knife. The grinding wheel is driven through a belt 116 which passes over a pulley 117 on the grinding wheel shaft 110 and over a pulley 118 which is loosely mounted on a shaft 119.- The pulley 118 is provided with a clutch member 120 adapted to be engaged by'a clutch member 121 on the shaft 119. The guide pulley 29 for thecutter driving belt 28 is secured to the shaft 119 and acts as a driving hen the grinding wheel is out of active position, the

clutch members

120 and 121 are out of engagement so that the grinding In this construction, any

pulley for the shaft.-

rior 0f the knife when desired.

leases the clutch operating lever 123 so that the clutch members are again disengaged.

A guard plate 124 may be arranged back of the cutting point to prevent the chips or skivings from commg forward into position to interfere with the proper guiding and feeding of the work. When used, this guard is preferably formed of celluloid or other transparent material so that it will not obstruct the view of the OPem O The guard 84 which supports the presser foot and the chip ejector is hinged to the knife casing 26 by the pivot 125 so that it may be swung up to give access to the inte- \Vhen swung down into position, it is'h'e'ld by a latch 126. i I

' lVhile it is preferred to employ the specific construction and arrangement of the parts shown and described, it isto be under- ,stood that this construction and arrangement is not essential to the broader features of the invention and may be varied and modified as found desirable or best suited to the construction of machine in which the invention is to be embodied.

Having explained the nature and object v of the invention and specifically described ,work-engaging surface of the work support.

2. A skiving machine having, incombination, a work supporting feed roll, a presser, and a cylindrical skiving knife above the roll mounted to rotate about an axis inclined upwardly with relation to the direction of the feed. I I

3. A skiving machine having, in combination, a cylindrical skiving knife mounted to rotate about an axis inclined to the direction of feed, a feed roll mounted below the knife in rigid relation thereto to determine the angle of skiving, and a presser foot mounted to yield bodily and angularly with relation to the periphery of the, roll.

4. A skiving machine having, in combination, a cylindrical skivmg knife, a feed roll mounted below the knife 1n rigid relation thereto to determine theangle of the skiv- I ing, and a presser above the roll mounted to yield bodily and angularly with relation to the periphery of the roll.

5. A skiving machine having, incombination, a cylindrical skiving knife, a feed roll below the knife, 21- cooperating feed disk, a presser above the roll, and means for adjusting the feed roll laterally to determine the angle of the skiving and for moving the disk and presser with the feed roll.

6. A skiving machine having, in combination, a. cylindrical skiving knife, a feed roll below the knife, a presser above the feed roll, means for vertically adjusting the knife to determine the depth of skiving, and means for laterally adjusting the feed roll and presser to determine the angle of the skiving.

7. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife having a periphery curved vto correspond to the curvature of the knife edge, a cooperating feed disk, a presser foot above the feed roll, an edge gage, means for adjusting the knife over the center of the feed roll and for adjusting it vertically,

and means for adjusting the feed roll, edge gage and feed disk laterally to vary the angle of the skiving.

8. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife having a periphery curved to correspond to the curvature of the knife edge, a presser above the feed roll having a work engaging surface curved to correspond to the curvature of the knife edge and mounted for angular movement with relation to the periphery :of the feed roll, and means for yieldingly holding the presser against angular movement and movement away from thefeed roll.

9. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife, a cooperating feed disk, a presser above the feed roll, an edge gage, means for adjusting together the feed roll, disk, presser and edge gage laterally to vary the angle of the skiving, and means for adjusting the presser and edge gage laterally with relation to the roll.

10. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife having a periphery curved to correspond to the curvature of the knife edge, and mounted to rotate on an axis, a presser abovethe roll mounted to yield bodily and angularly with relation to the periphery of the roll, and means for adjusting the roll transversely to vary the angle of the skiving.

11. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife having a periphery curved to correspond to the curvature of the knife edge, a shaft carrying the roll, means for adjusting the shaft longitudinally to vary the angle of skiving, a presser above the feed roll, a feed disk, and an edge gage.

12. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll mounted below the knife in rigid relation thereto to determine the angle of skiving, an edge gage, and a yielding presser above the roll having a surface extending over the knife edge adjacent to the edge gage.

13. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife having a periphery curved to correspond to the curvature of the knife edge, and a presser above the roll mounted for adjustment in a curved path parallel to the knife edge. a

let. A skiving machine having, in combination, a skiving knife, a feed roll, an edge gage, and a presser foot provided with a slot embracing a portionof the edge gage.

15. A skiving machine having, in combination, a skiving knife, a feed roll, an edge gage formed on a downwardly curving arm, a support for the arm arranged below the knife to leave an unobstructed space between the arm and knife edge, and a presser foot for pressing the work against the feed roll.

16. A skiving machine having, in combination, a cylindrical skiving knife, a feed roll below the knife having a periphery curved to correspond to the curvature of the knife edge, an edge gage, means for adjusting the edge gage with relation to the feed roll, and a presser mounted for movement in a path substantially parallel to the knife edge and provided with a slot embracing a ortion of the ed e a e.

17. A skiving machine having, in combination, a feed roll, a presser, a cylindrical knife above the feed roll, a head provided with a casing partially surroundingthe knife, and a guard plate pivoted to the casing and overlying th front of the knife.

18. A skiving machine having, in combination, a skiving knife, a feed roll, a coopcrating feed disk, a movable support for the disk, and means for adjusting the feed roll laterally to vary the skiving and for moving the support in unison with the roll.

19. A skiving machine having, in combi nation, a skiving knife, a feed roll, a coopverating feed disk, a shaft carrying the feed roll, a. pivoted supporting arm carrying the feed disk, means for moving the shaft longitudinally to adjust the feed roll transversely, and connections between the shaft and arm for moving the disk in unison with the roll.

20. A skiving machine having, in combination, a skiving knife, a feed roll having a taper bore, a feed roll shaft having a head provided with a taper surface fitting the bore, devices for forcing the roll onto the taper surface of the head and maintaining it in position, and a presser cooperating with the roll to feed the stock against the knife edge. i

21. A skiving machine having, in combination, a skiving knife comprising a thin shell, a feed roll below the knife having a taper bore, a feed roll shaft having a head provided With a taper surface fitting the bore, devices for removably holding the roll in frictional engagement with the taper surface on the shaft, a presser above the roll, and an edge gage.

22. A skiving machine having, in combination, a skiving knife, a'feed roll shaft below the knife provided Witha head having a taper periphery, a feed roll having a taper bore fitting the head,

with the head, a presser above the roll, and an edge gage.

' 23. A skiving machine having, in combination, a cylindrical skiving knife, means an independently rotating ejector arranged to cooperate with the interior surface of the knife in discharging the skivings.

24:. A skiving machine havlng, 1n combinatlon, a cylindrical skiving knife, means "for presenting the stock to the knife, and a rotary ejector havinga chip engaging surface close to'the inner surface of the knife ejector roll arranged close to the inner surface of the knife with its axis oblique to the direction of travel of the knife.

26. A skiving machine having, in combination, a cylindrical skiving knife, means for presenting the stock to the knife, an ejector roll arranged close to the inner surface of the knife with its aXis oblique to the direction of travel of the knife, and a yielding support for the roll.

27. A- skiving machine having, in combination, a cylindrical skiving knife, means for presenting the stock to the knife, and an ejector roll mounted within the knife with its aXis oblique to the direction of travel of the knife and having a cylindrical surface and a conical front end. I 28. A skiving machine, having, in combination, a skiving knife, a feed roll mounted in rigid relation thereto to determine the angle of the skiving, a presser foot above the roll mounted to yield bodily and angularly with relation to the periphery of the roll, a spring for resisting angular movement, and a spring for resisting bodily movement of, the presser.

29. A skiving machine, having, in combination, a skiving knife,-a feed roll mounted devices for removably holding the roll in frictional engagement for presenting the stock to the knife, and

in rigid relation thereto to determine the angle of the skiving, a presser foot above the roll, a yielding support on which the presser foot is pivoted and a spring for resisting movement of the foot about its pivot.

30. A skiving machine, having, in combi nation, a skiving knife, a feed roll mounted in rigid relation thereto to determine the angle of the skiving, a presser foot above the Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

r011, an edge gage, a yielding support to 10 which the presser foot 1s pivoted, and a spring between the support and foot for pressing the end of the foot adjacent to the edge gage toward the feed roll.

ALEXANDER M. ALEXANDER. WVitnesses:

LILLIAN B. DUPEE, CHESTER E. ROGERS.

Washington, D. 0.

It is hereby certified that in Letters Patent No. 1,169,060, granted January 18, 1916, upon the application of Alexander M. Alexander, of Beverly, Massachusetts, for an improvement in SkiVing-Machines, errors appear in the printed specification requiring correction as follows: Page 1, line 102, for the Word of, second occurrence, read to; page 2, line 16, for the word fed read feed; same page, line 34, for the numeral 1 read 7; page 6, lines 71-72, strike out the words comprising a thin shell, same page and claim, line 72, after the Word "knife insert the words comprising a, thin shell; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 7th day of March, A. D., 1916.

J. T. NEWTON,

Acting Comm'issz'oner of Patents.