US1771606A - Skiving machine - Google Patents

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US1771606A
US1771606A US529237A US52923722A US1771606A US 1771606 A US1771606 A US 1771606A US 529237 A US529237 A US 529237A US 52923722 A US52923722 A US 52923722A US 1771606 A US1771606 A US 1771606A
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knife
roll
feed
machine
work
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US529237A
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Milton H Ballard
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United Shoe Machinery Corp
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United Shoe Machinery Corp
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    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00Manufacture of leather; Machines or devices therefor
    • C14B1/02Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
    • C14B1/14Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using tools cutting the skin in a plane substantially parallel to its surface
    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14BMECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B2700/00Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/25Cutting or shearing hairs without cutting the skin

Description

M. H. BALLARD 1,771,606
SKIVING MACHINE Filed Jan. 14, 1922 2 Sheets-Sheet l =HLH-1' V y 29, 1930. M. H. BALLARD 1,771,606 w SKIVING MACHINE Filed Jan. 14, 1922 2 Sheets-Sheet 2 IIIIIIIIIIIIIIIIIIIIIIL'l Patented July 29, 1930 amino STA TBS-PATENT oFricE HOSE'ITS, ASSIGNOE TO UNITED SHOE MA- N, NEW?! JERSEY, A CORPORATION OF NEW SKIVING ivraorrrnn Application filed January 14, 1922. Serial No. 529,237.
This invention relates to skiving machines and is herein illustrated as embodied in a machine of the Amazeen type. V
In machines of this type the work is fed by a cooperating feed roll and feed disk to a rotary kni engagement of its edge with a gage and being held down upon fe', the work being guided by stationary edge roll close to'the edge of the knife by a presserfoot. The presser-foot, which may raised and lowered to provide for pieces work of diff margin of the cated close to gage. Hithe of erent thicknesses, engages the work and has an end-face lothe operative face of the edge rto, the presser-foot has been so mounted that raising and lowering it has caused it to tilt more or less,
that, in some enough space with the result of its positions, there has been between the end face of the presser-foot and the operative face of the edge gage to to rlse betwe edge of the work does so use, the accuracy permit the edge of the work en these two faces. When the of the skiving operation is destroyed since According the illustrated presser contact with and I lowered the two faces. tion the presser-foot the edge gage no longer functions properly.
feature of the invention has an end face in the operative face of the edge to one without causing separation of In the 1llustrated construchas a stem whlch is received in a vertical guideway. Its movement is thus vertlcal; the two faces referred to above are also vertical, and consequently the faces remain presser foot.
Other features improvement roll for angular and to the prov] These and in contact in all positions of the of the invention relate to the mounting of the feed and longitudinal adjustment, 'sion of means for deflecting away from the cutting point the skiving operation.
other features of the invention sin including certain details of construction. and
combinations embodied in pointed out i Referring ings:---
of parts will be described as an illustrative machine and n the appended claims.
to the accompanying drawthe feed be raised Fig. 1 is a front elevation of the machine in partly in elevation and,
partly in section, showing more particularly 7 the mounting of the feed roll; r Fig. 4-. is a perspective showing more par.- ticularly the mountingof the presser-foot;
Fig. 5 is a perspective showing more particularly the chip deflector and the knife guard; Fig. 6 is a perspective showing the presserfoot, the auxiliary edge gage and the manner, in which the two members are mounted;
Fig. 7 is an elevation showing the knife andthe chip deflector;' f
Fig. 8 is a perspective showing the belt shifting mechanism; Fig. 9 is a section showing the friction clutch through which the feed roll shaft is driven; and f I i j Fig. 10 is an end view of the feed roll and a section of the mechanism for adjusting the roll toward and from the knife. Referring first more particularly to Fig. 1,
the illustrated machine" is of the Amazeen type and comprisesa rotary skiving knife 11 to which the work is fed by a feed roll 13 and a'co-operatingfeed disk 15, a grinder 17 be ing provided for sharpeningthe knife. The knife is fast to the lower end of a shaft 19 which is rotatable in a sleeve 20, said sleeve being carried'by bearings 21, 23, which are integral with the frame .25 of the machine. A clamping member 27 engages the sleeve 20 between the bearings 21 and 23 and is engaged by an adjusting screw 29 by turning which the knife may be raised and lowered to provide for work of different thicknesses. Near the upper end of. the knife shaft 19 is a pulley 31, a driving belt 33 passing around this pulley, over suitable guide pulleys and around a pulley 35 on the driving shaft 37. A. second belt 39 passes around a second pulley 41, around suitable guide pulleys and around a pulley on the shaft of the grinder 17. .A third belt 43 passes around a pulley 45 on the driving shaft and around pulley 17 on a counter-shaft l9, this last-named belt serving, as will presently be described, to drive the feed roll 13. The driving shaft 37 is rotated from a suitable source of power, usually located beneath the bench upon which the machine stands, by means of a belt 51 whichpasses over a pulley 53 also fast to the driving shaft 37. This belt 51 may be shifted from the tight pulley 53 to the loose pulley 55 when desired by manipulating the hand lever 57 of a belt shifter. This 'belt shifter is shown in detail-in Fig. 8 and comprises a forked arm 59 which embraces the belt 51.
Referring now more particularly to Figs. 5 and 7 there'are associated with the knife a chip deflecting mechanism and a knife guard. The chip deflecting mechanism comprises a stationary chip deflector 61 located above the point at which the cutting of the work takes place, so that the chips as they are form ed will be directed upwardly between the knife and the deflector in the manner indicated by the arrow 63 in. Fig. 7. This chip deflector is carried at the outer ends of flat arms 64 which are slidable in grooves in a bracket 65, the bracket being fastened to the bearing 23. The deflector 61 may thus be adjusted toward and from the axis of the knife so as to compensate for the decrease in size of the knife as it is worn down by being ground. A clamping screw 67 threaded into the bracket 65 engages one of the arms 64 and holds the deflector 61 in adjusted position. In use, the deflector 61 is adjusted approximately into the position shown in Fig. 7 so that, as has been explained, the chips are directed up behind it. The knife rotates in the direction indicated in Fig. 5 by the arrow; and in order to aid in carrying the chips away from the cutting point the lower end of the knife carrier is provided with a series of grooves69 whichengage the chips and throw them to one side.
When no chip deflecting mechanism is provided in a machine of this kind, the chips tend to interfere with the proper operation of the machine by accumulating at the cu ting point and getting beneath the presserfoot, by winding around the knife shaft, and in various other ways. With the present device the chips and dust are immediately engaged and thrown off to one side where they can produce no such disadvantageous results. It should be noted that the grooves 69 in the rotating knife carrier not only act mechanically upon the chips and dust but also act in a measure as a fan to blow the chips and dust away.
When the inner edge of a vamp is being skived, it frequently happens, in turning the vamp, that some portion of the edge which has already been skived is brought into contact with one side of the knife and thereby out. In order to prevent this and similar undesirable occurrences, there is provided a knife guard 71 part of which is located beneath the knife and part of which is located opposite the cutting edge of the knife. The portion 171 beneath the knife has a substantially straight thin edge which is located close to the under side of the knife, while the raised portion 271 has an upright face spaced from the edge of the knife and having a contour corresponding to that of said edge. This guard 71 is carried by a bent stem 73 which passes through a block 75 and is held in ad justed position therein by a set screw 77. The stem of the block extends up into a socket in the frame of the machine and is held in adjusted vertical and angular position by a set screw 7 9. With sible to adjust the guard accurately into proper position as the knife wears away, due to being ground.
Referring now more particularly to Figs. 1, 9 and 10, the manner in which the roll and feed disk is driven will be described. Fast to the shaft 49 which carries the pulley 17 is a small gear83 which meshes with a large gear 85, the last-named gear being loosely mounted upon a hub 87 which is integral with a horizontal shaft 89. Fastened to the hub 87 of the shaft 89 by a screw 91 and held from turning by a pin 93 is a disk 95; and located between the disk and the gear is a friction disk 97 so that when the gear 85 is moved to the right the shaft 89 will be frictionally clutched to the rotating gear 85. In order to permit the clutch thus to be thrown in, a sleeve 99 is loose on the shaft 89, but held from rotation with respect thereto by apin 101 which passes through a vertical slot in the flange at the right-hand end of the sleeve. The sleeve is thus held from rotation with respect to the shaft 89 but may be moved a shortdistance longitudinally thereof. Located between the left-hand end of the sleeve 99 and a slidable collar 103 is a coiled spring 105; and located on the opposite side of the collar 103 from that which is engaged by the spring is the upper end of a lever 107 fast to a rock-shaft 109 and pivoted at its lower end at 111 to a link 113. This link 113 (see Fig. 1) is pivoted at its left-hand end at 115 to the downwardly extending arm of a bell-crank lever 117. lever is pivoted at 119 to the frame of the machine, and the horizontal arm of the lever is pivoted at its right-hand end to the upper end of a treadle rod 121, the lower end of which is attached to a shown. WVhen, therefore, a downward pull is exerted upon the treadle rod 121, the friction clutch, which has just been described, is thrown in and rotation is imparted to the shaft 89. Inasmuch as the clutch is one of the friction type, it should be noted that by varying the force of the downward pull upon the treadle rod, the clutch may be permitted to slip more or less if desired, and consequently the rate of rotation of the shaft this construction it is pos- I suitable treadle, not
This a the lever 107 and the spring 89 may be varied. If, on the other hand, it is not desired to vary the rate of rotation of the shaft 89, but to cause the rate to be constant, thisresult may be accomplished by adjusting the set screw 123 (Fig. 1). This set screw is threaded through the outer end of a lever 125 which is fast to the rock-shaft 109, the lower end of the set screw abutting against the frame of the machine. 'It will thus be seen that by manipulating the set screw 123, the rock-shaft 109 may be rotated in a clockwise direction so as to exert through 105 the desired degree of pressure'upon the friction clutch.
The shaft 89, as will presently ap ear, is
practically a part of the feed roll siaftso' that, when the rate of rotation of this shaft is varied, the rate at which'ithe work is fed is also varied. As has been explained above, the feed disk 15 cooperates with the roll 13 in feeding the work. It is therefore desirable that when the rate of rotation of the feed roll is varied, the rate of rotation of the feed disk should be similarly varied. This result is accomplished in the present machine by driving the feed disk from the feed roll shaft. To this end there is fast to the shaft 89 a pulley 127 which is connected by means of belt 129 with a pulley 131 which is fast to the shaft 133 on the lower end'of which the feed disk is carried. The shaftofthe feed disk is mounted in the manner. common in machinesof this type, being preferably held in the position shown by a spring 135 which permits it to rise when a piece of work is fed to themachine. Theparts of the machine are so proportioned and the driving mechanism so constructed that the peripheral velocity of that portion of the feed roll which cooperates with the feed disk is substantially the same as the corresponding portion of the feed disk. In other words, the two feed members, feed roll and feed disk, which engage respectively the under side and the upper side of the work, both tend to feed the work at the same rate. With the construction in which the feed disk is driven from the feed roll shaft, it will be obvious that any change in the rate of rotation of the feed roll shaft will correspondingly change the rate of rotation of the feed disk andthat therefore the variation of the feed of the work will be properly accomplished.
The feed roll 18 of the present machine is adjustable about a point such as that indicated at 137 in Fig. 5 which is located substantially in the upper element of the feed roll, but at a locality spaced from the end of the roll. A feed roll adjustable about such a point is shown, described and claimed in application, Serial No. 317,311, filed Aug 13, 1919 in the name of Dyer, upon which Patent l lo. 1,500,117 was granted July 8, 192 1. Without at present going into the details of the reasons for adjusting the feed roll about such of the link 179 contacts a point, it will be explained here merely that such adjustment permits different sorts of scarfs to be produced merely by adjusting the roll angularly. Referring now more particularly to Figs. 3 and 10, the feed roll 13 is fast to the outer end of a shaft 139, the inner end of which is connected by a universal joint 1l1 to short shaft 143, said last-named shaft being keyed to and fitting telescopically within a hollow member 145, the hollow mem her being in. turn connected by a universal join 1 17 with the shaft 89. With this construction it will be apparent that rotation of the shaft 89 will cause rotation of the feed roll and that the roll may be adjusted angularly without interfering with its rotation. '1 he shaft 139 is rotatable in a sleeve 151 which is adj ustably held in a roll carrier 153 a pinch screw 155. The roll carrier 153 is provided with two curved guides 157 the cenof curvature of which is a horizontal line through the point 137 shown in Fig. 5, ght to the upperelement of the The curved guides are received in :espondingly curved guideways 159 in a t wo-piece bracket 161, said bracket being pivd to the frame of the machine at 163 and "istable about this pivot so that the roll nay be'adjusted toward and from the edge of is knife in the plane of the work when de- -c. In order to hold the bracket 161 in tion and to facilitate the adjustment just rred to. aheaded stud 165 passes through 167 which is fast to or integral with the frame the machine. l hreaded on the lower re 1 13d end of the stud 165 is a nut 169 having iandle 17 3 by which it may be readily ied. An adjusting screw held from longitudinal movement with respect to the bracket 161 and threadedthrough the stud provides meansfor adjusting the bracket 161 about its pivot 163 when the nut 169 has been loosened. Pivoted to the roll carrier 153 at 177 is one end of a link 179 the other end of which is pivoted at 181 to the upright arm of a bell-crank lever 183 the horizontal arm of which is pivoted at 185 to the upper end of a treadle rod 187. The bell-crank lever is pivoted to the machine at 189 so that when the treadle, not shown. is depressed to exert adownward pull on the rod 187 the feed roll 13 is adjusted angularly in a counterclockwise direction. It is desirable, in a machine having an adjustable roll of this type, to provide limits between which the adjustniient may take place. When the treadle is depressed, the bell-crank lever is rocked in a clockwise direction until the right-hand end with the end of a set screw 191. In order to limit the movement. of the bellcrank lever in the other direction there is provided on the upright arm ofthe bell-crank lever (see Fig. 1) an ear 193 which contacts with the endof a set screw 195. It
will be understood, of course, that by changing the positions of the set screws 191 and 195, the limits of angular movement of the feed roll may be changed. As shown in Fig. 2, a pointer on the roll carrier and a cooperating scale on the bracket- 161 are provided for the convenience of the operator.
In machines of this type it is desirable to be able to adjust the roll longitudinally of its shaft so as to vary its position with respect to the point or axis'137 about which it is adjustable. To this and (see Fig. 3) there is threaded into the carrier 153a screw 197, said screw having upon it a collar and ahead between which extends a flange formed on the outer end of thesleeve 151. Consequently, by turning the screw in one direction or the other, the sleeve and with it the feed roll 13 may be moved to the right or to the left, such movement being permitted by the telescopic connection between the parts .143 and 145 which are located between the universal joints 141' and 147. Before so adjusting the roll it will, of course, be necessary to loosen the pinch screw 155.
Referring now more particularly to Figs. 6 and 2, the construction and adjustment of thepresser-foot and the edge gages will be described. The present machine, like that of the machine shown in the patent to Dyer 1,327,028, is provided with a presser-foot and two edge gages, a main edge gage and an auxiliary edge gage, the construction being such that the work may be presented as may be desired either with its edge in engagement with the auxiliary gage or in engagement with the main edge gage. The main or stationary edge gage is shown at 199 and the auxiliary edge gage at 201. The auxiliary gage 201. is substantially like that of the patent, being fast to the end of a lever 203 which is pivoted at 205 to a block 207. This block 207 is slidable in the general direction of the axis of the feed roll in a guideway formed in a plate 231 and may be adjusted forward and back by means of a thumb nut 211 which is held from bodily movement in thedirection of the adjustment, but may be rotated upon a screw 213, the screw being fast at one end to the block 207. The auxiliary gage is pressed downwardly by a spring 215 which surrounds a pin 217 (Fig. 3), said spring at its lower end resting upon the lever 203 and its upper end bearing against an overhanging arm on the block 207. The lower end of the pin has a head 219 which engages the under side of the lever 203 and at its upper end is threaded to receive the thumb nut 221. By turning this thumb nut the lever 203 may be raised and lowered about its pivot 205. Thus far the construction and mounting of this auxiliary edge gage is or may be substantially like that shown in the patent. It is sometimes desirable to hold this auxiliary edge gage 201 in raised position so as to facilitate presenting the edgeof the piece of work to the main or stationary edge gage 199. The head 219 is ordinarily received in a groove formed in the under side of the lever 203; but when it is desired to hold the auxiliary gage permanently in its raised inoperative position the lever is first raised by hand and then the pin 217 is rotated until the head 219 engages the under side of the lever 203 and holds it in raised position as shown in Fig. 3.
In the machine of Patent No. 1,327 ,028, a presser-foot is shown which may be raised and lowered to provide for work of different thicknesses; but, in raising and lowering the foot, it is tilted more or less so that in some of its positions it does not bear with all of its operative face upon the work. In the machine of the present invention a presser-foot is provided which is compelled to move in a vertical the whole of its operative face will press uniforinly upon a piece of work whether the work be thick or thin. Referring now more particularly to Figs. 4 and 6, the presser-foot 223 has formed integral with it a cylindrical stem 225 which is received in a cylindrical socket 227 formed at the outer end of a bracket 229 which is integral with the plate 231. A lever 233 having a beveled outer end which fits loosely in a slot in the stem 225 is pivoted at 235 to the bracket 229. A spring 237 has its lower end bearing on the plate 231 and its upper end bearing against the under side of the lever 233. Threaded through the lever 233 is a screw 239 having a reduced lower end which fits into the coils of the spring 237. The spring 237 tends to raise the inner end of the lever 233 so as to force presser-foot 223 downwardly against the work. In order to limit the extent of the downward movement of the presser-foot 223 the extreme inner end of the lever 233 is provided with an eye 241 through which passes loosely the stem of a screw 243 which is threaded into the plate 231. lVith this construction it will be apparent that the presser-foot 223 may be raised and lowered by turning the nut which is threaded upon the upper end of the screw 243 and that the tension of the spring 237 may be varied by turning the screw 239. It will be noted too that as the presser-foot is raised and lowered, it moves in the substantially vertical path determined by the socket 227. In order to prevent the presser-foot from turning angularly in a horizontal plane, the inner end of the foot has a vertical flat face which contacts at all times with a similar face 245 formed upon an extension of the main edge gage 199. Engagement of these two faces not only pre vents the presser-foot from turning angularly in a horizontal plane but prevents the edge of the leather which is being skived from working up between the presser-foot and the edge gage. It is at times desirable to adjust the presser-foot, the main edge gage and the direction when it is adjusted so that i {I justed to more or less upon the treadle and thereby auxiliary edge 'gage'in unison in a direction transverse to the direction of feed of the work; and to this end the plate 231 which carries directly or indirectly all of these parts hasbeveled edges which are received in. corwithdrawn suflicientlyv Thus after the screw is loosened the plate 231 carrying all the parts which have been mentioned, may be adjusted toward and from the line of feed and then clamped in position where desired.
In the operation of the machine, assuming that the feed roll '13 occupies the angular position shown in the drawings and that in such position the upper element of the roll is substantially parallel to the plane of the cut of the knife, and that the operator presents the edge of the work beneath the auxiliary gage 201 and in contact with the gage 199, in such case a so-called shoulder scarf will be produced. If a feather-edge scarf is desired then the treadle connected to the rod 187 will be 1 depressed prior to presenting the work to the machine, so as to tilt the feed roll about its axis 137. If a seam scarf having a straight inclined surface and a comparatively thick edge is desired, then with the treadle held depressed, the edge of the work willbe presented to the auxiliary gage 201. If a large number of scarfs of the same character are to be produced consecutively upon a group of pieces of work, the feed roll may first be adthe desired angular position and then locked in that position by means of a set screw 252 which is threaded through the bracket 161 and bears with its end against the carrier 153.
The knife 11 is rotating continuously as long as power is being applied to the belt 51 and the belt is on the tight pulley; but the feeding of the work does not begin until the treadle which is connected with the rod 121 is depressed. As soon as that occurs, the feed roll and feed disk begin to rotate so as to ad- Vance the work to the knife. If, during the feeding of the work, a sharply curved edge is encountered, the operator may ease pp crease the rate of feed; this control of the rate being particularly effective since the rate of rotation of the feed disk as well as that of the feed roll is varied.
Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.
' tilting as it Having thus described myinvention, what I claim as new and desire to secure by Let-, ters Patent of the United States is 1. A machine of the class described hav-. ing, in combination, a rotary skiving knife, a rotary feed roll an edge gage having a face against which the edge of the work isheld during the skiving operation, a presseradapted to hold the'work' against the roll, said presserhaving an end face in contactwith the face of the edge gage, and means whereby the presser. may be raised and lowered while maintaining the two 'last named. facesin contact.
2. A machine of the class described hav ing, in combination, a rotary skiving knife, a rotary feed roll, an edge gage having a face against which the edge of the work is held during the skiving operation, a presser-foot overlying videdwith a stem, a rigid member having a guideway to receive said stem, and means for: raising and lowering the presser-foot,the guideway being constructed to hold the foot from tilting as it is raised and lowered.
3. A machine of the class described having, in combination, a rotary skiving knife,a r0-. tary'feed roll, an edge gage having a face against which the edge of the work is held during the skiving operation, a presser-foot overlying the feed roll,-said foot being provided with a stem, a rigid member having a. guidewayto receive said stem, saidguideway being constructed tohold the foot from is raisedand lowered, a lever connected with the stem and pivoted to a rigid part of the machine, a spring for urging the lever in a direction to move the presser foot toward the roll, and an adjustable stop to limit the extent of such movement.
4. A machine of the class described having, in combination, a rotary skiving knife, a rotary roll for feeding work to the knife, an adjustable plate having a bracket formed with a guideway which extends in a direction normal to the surface of the roll, a presser-foot having a stem slidably mounted in the guideway, and means engaging the stem to raise and lower the presser-foot.
5. A. machine of the class described hav ing, in combination, a rotary disk skiving knife, a rotary roll for feeding work to the knife, a presser-foot for holding the work against the roll, the construction being such that the chips or skivings pass up over the knife, a chip deflector having its lower extremity located above and spaced from the knife at the locality in which the cutting takes place, and means whereby the deflector may be adjusted radially of the knife to cate the deflector properly in the first in stance andto provide for wear'of the knife.
6. A machine of the class described having, in combination, a rotary disk skiving knife, a rotary roll for feeding work to the knife,
the feed roll, said foot being proa presser-foot for holding the work against the roll, the construction being such that the chips or skivings pass up over the knife, a chip deflector in the form of a downwardly extending plate having its lower end located above and spaced from the edge of the knife at the locality in which the cutting takes place, said deflector being provided with a stem adjustably received in a groove in a stationary part of the machine, and means for clamping the stem in adjusted position.
7 A machine of the class described having, in combination, a rotary disk skiving knife, means for feeding a piece of work to the knife in such manner that the chips or skivings pass over the knife, a chip deflector between which and the knife the chips pass, and rotary means for engaging the chips and diverting them to one side of the line of feed.
8. A machine of the class described having, in combination, a rotary shaft having a hub at one end thereof, a disk skiving knife fastened to the shaft below the hub, and means for feeding a piece of work to the knife in such manner that the chips or skivings pass over the knife, there being formed on the hub a series of shoulders which engage the chips and divert them to one side of the line of feed;
9. A machine of the classdescribed having, in combination, a rotary shaft having a hub at one end thereof, a disk skiving knife fastened to the shaft below the hub, and means for feeding a piece of work to the knife in such manner that the chips or skivings pass over the knife there being cut in the hub a series of grooves to form shoulders which engage the chips and divert them to one side of the line of feed.
10. A machine of the class described having, in combination, a rotary disk skiving knife, a feed roll and a cooperating feed disk for advancing the work to the knife, means for adjusting the roll angularly to vary the inclination of the scarf manipulation of which adjusts the roll bodily in a direction parallel to its axis, and means for rotating the roll constructed and arranged to remain operative during either adjustment.
11. A machine of the class described having, in combination, a rotary skiving knife, a rotary feed roll, a work gage to which or beneath which the edge of the work may be presented, said gage being normally in lowered, operative position and means for holding the gage in raised position when desired to facilitate the presentation of work beneath it.
12. A machine of the class described having, in combination, a rotary disk skiving knife, a feed roll and a cooperating feed disk for advancing the work to the knife, means for adjusting the roll angularly about anaXis which is substantially tangential to an element of the roll to vary the inclination of the scarf produced, a member, manipulation produced, a member,-
of which adjusts the roll bodily in a direction parallel to its axis, and means for rotating the roll constructed and arranged to remain operative during either adjustment.
13. A machine of the class described having, in combination, a rotary disk skiving knife, means for holding the knife from angular movement, a feed roll and a cooperating feed disk for advancing the work to the knife, means for adjusting the roll angularly to vary the inclination of the scarf produced, a member, manipulation of which adjusts the roll bodily in a direction parallel to its axis, and means for rotating the roll constructed and arranged to remain operative during either adjustment.
14-. A skiving machine having, in combination, a knife for skiving the margin of sheet material, means for feeding material to the knife, means freely operable at all times during the operation of the machine for angularly moving the feed means during the operation of the machine, and a track for confining the feed means to move angularly.
15. A skiving machine as defined in the next-above claim in which the track is adjustable.
16. A skiving machine having, in combination, a knife for skiving the margin of sheet material, angularly adjustable means for feeding the material to the knife at varying angles to vary the scarf cut in the mar gin of the mate-rial, an intermediately pivoted lever, means connecting the feed means with the lever on one side of its pivot, means acting on the lever on'the other side of the pivot to effect angular adjustment of the feed means through the connecting means, and means for adjustably limiting the movement of the lever in opposite directions to limit adjustably the angular adjustment of the feed means in opposite directions.
17. A skiving machine having, in combination, a rotary knife, a feed roll and a feed disk for feeding material to the knife, the feed roll being adapted to occupy a normal position in which the feed roll is effective to feed the material, a lever, a link connect-- ing the lever to the feed roll, a member underthe control of the operator for actuating the lever to move the feed roll through the medium of the link from the normal position to a second effective position, and means tending to return the ma-l position, the lever-actuating means acting in opposition to the tending means.
In testimony whereof I have signed my name to this specification.
MILTON H. BALLARD.
lever towards the nor
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