US1659233A - Machine for operating upon blanks - Google Patents

Description

Feb; '14, 1928.

- J. M. BENJAMIN MACHINE FOR OPERATING UPON BLANKS Filed Aug. 29. 1923 Feb. 14, 1928.

J. M. BENJAMIN MACHINE FOR OPERATING UPON BLANKS 3 Sheets-Sheet 2 Filed Aug. 29, 1925 m 5 N. i W

3 Sheets-Sheet5 /NVNTOR- %M- 7V7. 5: a

J. M. BENJAMIN MAHINE FOR OPERATING UPON BLANKS Flled Aug. 29, 1923 Feb. 14, 1928.

l mented Feb. 14-, 1928.

UNITED STATES Parent orsica.

.JOHN MI. BENJAMIN, @F BEVERLY, Iw'IASSACHUSETTS, ASSIGNOR '10 UNITED SHOE MACHINERY GGRPOELATIOH, F ?ATERSON, NEW JERSEY, A CGRPGRATIOIT OF NE'W JERSEY.

MACHINE FOE OPERATING UPON BLANKS.

Appficationfiled August 29, v1923. Serial No. 659,978.

The present invention relates to machines for operating upon blanks and herein illustinted as embodied in a machine for skiving box toe blanks for use in the manufacture of boots and shoes.

A type of skiving machine commonly ein plevcd tor this class of work is provided with a rotary cylindrical skiving knife against which the work to be skived is fed. Such machines usually comprise, in addition to the cylindrical knife, a driven feed roll which is located partiallv within the knife near the upper portion or its cutti. a presser member which located. outside the l-oii'l'e and above the feed roll and which c0- operates with the latter to feed the work, and stationary edge against which the work is hold while it is being fed. The presser member may, as in the case 0'? the presentinachine, take the form of a driven roll, such a construction being used principally tor operating upon comparatively stiff pieces at work. In using machines of the above described character for skiving the mars as oi boi: toe blanks-n counters. or

similar pieces having curved edges, the blank skiving' mechanism to must be guided or controlled, manually or otherwise while being fed, so that it will be turned gradually in its own plane and its curved edge held against the edge gage con tinuously throughout the skiving operation. l thermore, alter the margin at one edge or thcblank has been skived, the blank must be repositioned relatively to the skiving knife in order that the blank may be propererly presented and fed to the knife to enable the latter to skive the margin around the other edge or edges of the blank. lileretotore, this lepOSllilOlllllg oi the blank has been accomplished manually.

juicer-ding; to one feature of the present invention, there is provided a machine for operating upon two localities of a blank in which the blank, after one locality has been operated upon, is automatically repositioned and presented a second time to the operating means to cause the second localityftobe operated upon. In the illustrative machine, a be); toe blank attcr having first been fed to sltiving mechanism in position to have its breastinargin skived is automatically repo' sitioned and presented a second time to'the have its toe margin red. I

in the inanelecture blanks it often sup port or desired thatthe angle of the skive or bevel along one edge or the blank be diiierent from that or the SlZlVG along the other edge or edges. According, therefore, to another ten- 'tnre ottheinvention, the relative position pointed'outin the appended'clainis.

llcrerring now to the accompanying draw- Fig. l is' a top plan view of a machine in which the present invent-ion is embodied, certain portions of the machine being broken away; i y i r 2 is a fragmentary plan view of one or the parts whichis broken away in Fig.1;

Fig. 3 is a side elevation al view of the machine i i Fig. i: is a detail view, partially in side elevation and partially in section, showing a port-ion of: the device for seizing andreposi tioning the blanks otter their breast inargins have been sltived: y

5 is a pcrspective'view showing; the greater part ot the machine;

Fig. (3 is a vertical sectional View taken substantially along the line 6-6 of Fin. 3; and

Fig. 'i' is a detail sectional view of a portion oi the work supporting table showing tne edge a? A pusher partially retracted. i

In the drawings, the invention is shown as embodied in a skiving machine of the general type disclosed in Patent llO. 155M383, granted April 22, 1919, upon an application riled in the name of A. Latham. The machine of the present application, in coinn'ion wvith that of said patent, comprises a rotary cylindrical skiving knife 2 (Fig. 3) a driven teed roll l, and ahollow base 6. A portion at the to ofthe base 6 constitutes a work able 3 across which the work is in onerativo position and the iii fed While being skired. The knife 2 is carried by a main driving shaft 10 which is journaled in suitable hearings in the base (5 and the upper portion of the knife projects slightly above the top of the base in position to engage the Work. The periphery of the feed roll +1 is curved longitudinally to co1'- respond to the transverse curvature of the knife edge and said roll is yieldingly supported in such a manner that it may yield bodily away from the knife edge and also tilt. about anaxis which is at right angles to its axis of rotation. The feed roll l is driven from a feed roll drive shaft 12 through suit able gearing and the shaft 12 is driven from lhe'niain or knife shaft 10 by means of a belt. The mounting anddriving connectionsof the feed roll 4'. have not been shown in the drawings since they are or may be like those of the patented machine. The work held against the feed roll at by means of a presser member which, in the illustratire machine, is a roll 14, Whereas in the patented machine av stationary presser foot is employed. ith the exception of the pres-Ger roll 141 the construction and mounting of which will be hereinafter described,

the parts thus far mentioned are or may be similar to ct'n'responding parts of the machine of the patent herembefore referred to and reference is made to said patent for the details of construction of said parts.

In accordance with the present invention, the box toe blanks or other pieces to be operated upon are stacked one above another in a magazine 16 with the lowern'iost blank resting upon a portion of the feed table S somewhat to the rear and at one side of the co-operatinofeed and presser rolls. The blanks are led edgewise and one by one from the bottom of the magazine 16 by means of a reciprocating feed plate or pusher 18 by means of which they are successively positioned upon the feed table as shown by full lines at in in Fig. 1. While being thus tr.-i m ferred from the magazine, each blank rides over a yielding edge gage 22 on the feed tablr. As shown in Fig. 7 the edge gage 12 consists of a thin strip of spring ell-Pl having one end secured at 22-3 to the feed table ti and having its opposite end bent down *ardly to form a gaging shoulderQ-l. The edge go strip 22 is arranged so that normally ibis inclined urnvardly in the di rection of feed of the blanks and the shoulder 2-1 operatively positioned in the path of the blanks. its a blank fed over the pusher, the strip 2:2 is forced downward by the blank, the shoulder portion 2% being depressed into an aperture in the table 8, to permit the blank to pass thereover Without being lifted above the table. lVhen the pusher l8has reached the limit of its feeding movement the blank is positioned as shown at- 2 in Fig. 1, the curved breast edge of the blank being in contact with the forward and correspondingly curved face of the pusher, and one corner of the blank is located between the feed and presser rolls, the latter being then separated by a distance somewhat greater than the thickness of the blank. The presser roll is then lowered to engage the blank yieldingly and the preasrr and feed rolls, both of which are continuously driven, cooperate to feed the blank past the rotating skiving knife. is the presser roll is lowered, a prcsser foot 26 is depressed against the upper face of the blank and presses the blank against the feed table while the blank isbeing fed. The iresner foot 26 acts as a drag to oppose frictionally the feed of the blank and the prersscr foot is so located relatively to the bite of the ford and presscr rolls that. the drag exerted thcrw by causes the curved bruist edge of the blank to hug the forward edge of the pusher 18 as the blank being fed. Thus the blank is guided or controlled in such a Way as to insure that a scarf or bevel of uniform width will be made along and throughout the length of the breast margin of the blank. After the breast margin of the blank has been nkhsed, the blank occupies the position indicated by dotted lines at 528 in Fig. 1. lhe I'JI'CSI-zfll roll ll, together with the pressor foot 26, is then lifted from the blank and the latter is seized by an oscillating gripper device 30 and thereby swung in its own plane sharply about the corner last presented to the skivlng knife, this mm'en'ient continuing until the blank repositioned as shown by dotted lines at 32 in Fig. 1, the blank than being presented to the grip of the feed and presser rolls in proper position for the shiting of the margin around the toe. During tl s repositioning of the blank, the pusher i is being retracted into position to remove an other blank from the magazine. As soon as the pusher has been witlulrau'n from above the edge gage strip 52:2, the latter rises by reason of it, sprin tension and the shoulder ill is thus lifted into ponitiou to engage the curved edge around the toe of the blank so as to guide the blank while its too margin is living skii'cd, the gage shoulde 2 Bl; at this time PUP forming a function similar to that of the curved forward edge of the pusher when the pusher is in its forward position and the blank is being fed for the skiving of its breast margin. The presser roll 1e and the presser foot 26 are then lowered and the blank is again fed past the skiving knife the presser foot serving to control the feed of the blank by causing the curved edge of its toe portion to hug the shoulder :24 of the edge gage so as to insure the cutting of a bevel of uniform Width around the toe margin of the blank. While the presser roll and the presser foot are lifted from engagement with he lan to ble the lat er t e rehill mistress positioned by the swinging ot the gripper device 30, the presser roll may be tilted to vary the angle of its axis relatively to the knife edge. and thus to cause the toe margin ot the blank to be bevelet at a diil'erent angle from that of the breast margin of the blank. fetter the margin around the toe. of the blank has been skived, the presser roll and the presscr ioot or again lifted to tree the hlai' 1 and the prcsser roll is tilted hack to its on inal angular axial relation to the knife edge preparatory to operating upon the breast margin of the succeeding blank. By this time the feed plate 18 and the gripper device 30 have also been restored to their initial positions, and the machine is ready to start another cycle of operations.

The magazine 16 for holding; the blanks to be operated upon comprises a rear wall 3-1 5 having a horizontal curvature corresponding to that of the breast edges of the blanks, and side walls 3% which are disposed at. an angle to the rear wall corresponding to the angles deined by the corners of the blanks. One oi. the side walls 36 may be formed inteei-ally vith the. rear wall as shown while the other side wall may be roleasably secured to the rear wall with provision for adjustment lLOVZllCl. and from its companion side wall, as indicate l at 38. thereby adapting the ni 'azine to hold blanks of ditl'erent sizes. 5 0 which ris rom the base 6 and extends thr-mzgg'h a bracket 42 carried by the magazine. The bracket 4:2 is secured to the post 4.0 at such elevation that the lower edges of the magazine walls will be spaced above the feed table 8 sutliciently to permit the t'eedplate 18 to reciprocate between the feed table and the bottom edge. of the magazine walls and to permit the lowermost. blank in the magazine to be renuived by the forward stroke ot the feed plate. The bracket 1-13 only be adjuctal'ily secured to the post l0 so that the space between the magazine walls and the .'eed table may be varied. to accommodate dincrcnt thicknesses of blanks.

The magazine is suonortedb a. st l. l

'llhe teed plate or pusher 18 is of the genoral triangular shape shown in Fig. 1 and its Forward edge is curred as sir-own at hi: to conform to the cmfvature ot the breast edge of the blanks. he thickness of the feed plate is preferably somewhat less than tha ot the blanks to insure against the possibility of engaging two blanks at a time in the magazine. The feed plate is movable in a rectilinear oath to teed the blanks into position to be engaged by the teed and presser rolls. To this end the feed plate is dovetailed to slide in a guideway l?) (Fig. 5) in the teed table 8. The portion of the teed plate which slides in the guideway 1-5 is extended forwardly oi the curved edge as shown-at do, to provide support for the hhuiltas it being fed :ronr the inagazinc.

plate is caused to remain at rest in i s tor ward position while the breast edge of the blank is being skived and during this time its curved forward edge *trmetions to nni-zle the blank as it is being lied to the knife.

The teed plate 18 is reciprocated by means of a lever one end of which is 'tulci upon a lined stul (l i jy. rising ilirim the base 6 while the opposite end ot said lever is connected by a short link 5% with the rear of the feed plate. lhe lever 50 swung to actuate the feed plate by means of a c 'ank pin 56 which is :arricd by a cam disk 58 and is connected to the lever 50 at apoint intcrmei rod orlink 60. The connccti as between the link 60 and the crank pin 56 am. also bctween said link and the lever 50 are in the form oitball and socket joints which permit the; ink to swing slightly in a horizontal.

' The feet plane as said leveris swung' about its tulcruni. The cam dia: 58 fired upon a. horizontal shalt 21 which is journaled in suitable bearings carried by the base 6 and which is driven through a clutch 64-. whereby the cam d is caused to make a halt' a revolution tu ice in each cycle oii operations as will be hereinatter explained.

The prcss r roll 14-. is rigidly .ecurcd upon a shaft. TO (il ig. which is iournaled in bearings '72 termed on a carrier let, the inner I ends of the bearings engaging; opposite tau-es ol said roll to prevent axial dis Jlacomcut of the roll and shaft. The presser roll l-lis shaped, best shown in Fig. 3, so that its? profile subs autially corresponds to that oi oi the feed roll 4-. The angle of the bevel formed by the skiving knife is varied by tilting the ot the presser roll to brinrg' timed its longitudinally curved periphery more or less nearlyparallel to the curved prolile. oi

the teed rol In order that the presser roll l l may be tilted axially as described. th roll carrier'l-:lis provided with segmental ribs it; which project outwardly from op osite sides thereot' and received in s c} mental guideways in the opposed sides a bifurcated segmental carrier support il The. center oil curvature of the ribs 76 and. associated guidcways is so lo .tiiQtl that whatever the angruh-ir adjustment of the press-er it I'll roll may hethe thickness of the skived edge.-

and the. shape or ot the blank will not be altered. To enable the presse' roll to be aised and lowered to release or engage the work. t-hecar'ier support '78 is seen ed to the lower end of a spindle 80 which is nounted for vertical sliding; moveu'ient within suitable bearings 82 and 84; supported by a standard 86 rising from the base (3.

T he presser roll is driven continuously from the teed roll drive shaft. ii? throughout the (,iperation oi? the machine. The. connections between the presser roll ll l and the,

shaft 12 comprise two horizontal shafts and 92 and an extensible link 9 1. The shafts 90' and 92 are disposed at right angles to each other and are journaled in suitable hearings on the base 6. he extensible link 94 comprises telescoping sections, one of which has a universal joint connection 96 with the presser roll shaft 70, while the other section of the link 9-1 has a universal joint connection 98 with the shaft 92. The extensible link and universal joint construction just h-scribcd permits the presser roll to be raised and lowered and also to be tilted as required at different stages of the operation upon each blank. Tlw telescoping sections of the link Sl t are constrained to rotate in unison by means of a pin and slot connection 100 (Fig. 5) arranged to permit a limited amount of relative longitudinal movement of the link sections. The shaft 92 is driven from the shaft 90 through intermeshing worm gearing 102 while the shaft 90 is driven by a chain 101 which pass-es over a sprocket wheel 106 on said sh: f, and over a sprocket wheel 108 on the feed roll drive shaft 12.

The frame or support for the presser roll and the presser foot is adapted to be raised and lowered at in't determined times in each cycle of operations of the machine by means of a caui-actiuited lever 110, said lever being fulcrunied upon a rod 112 that is supported at its ends in suitable bearings 114;. One end of the cam lever is pivotally connected at 116 to an car 117 rising from the carrier support 78, while the opposite end of aid lever carries a cam roll 118 which rides in a cam path 120 in the face of the cam disk The cam shaft 62, to which the cam disk is adapted to be connected through the clutch ti l-V, is driven from the shaft 92 through intern'ieshing worm gears 122 and 12 1, the gear 122 being fixed to the shaft 92 while the gear 121 loosel mounted upon the cam shaft 62.

To secure the necessary intermittent rotation of the cam disk 58, the cam shaft 62 is adapted to be connected with the gear 124 b v a clutch of the Horton type as indicated at (J4. This type of clutch is so well. known that it need not be described in detail herein. lt will be sufficient to explain that the clutch ti-l: has friction rollers 1215 (Fig. 3) adapted rolatably to connect the two clutch elements. of which the inner or driven element is fast upon the cam shaft ('32 while the outer or driving eleu'ient is secured to the gear 124. The friction rollers are normally held out of operation by means comprising a controller ring; 128, this ring be ng provided, as shown in Fig. 5, with a radially projecting lug which co-operates with one or the other of two abutment plates 132 carried by a control lever 134. The lever 13 1 is mounted to rock about a fixed horizontal pivot stud 136 and is actuated by rank pin 138 projecting into a. block 1 10 which is slidable within the slotted rear extremity of said lover. The crank pin 138 is carried by a worm wheel 1-12 which is mounted upon a fixed stud 141 and is contiiniousl driven by a worm 1% on the shaft 92. The forward end of the lever 131, which carries the clutch controlling abutments 132, is made in the form of a ring to encircle the cam shaft (12 and the abutments 132 are supported at diametrically opposite points upon the inner periphery of this ring. The ahutments .132 are cushioned by suitable springs 148 which absorb the shock due to the engagement of the lug 1.30 with the abutn'icnts. The abutiuents 132 are so arranged at different distances from the center of the ringshaped end of the lever 1-3 that when said lever is swung; in one direction to throw one abutment out of the path of the lug 130 on the irontroller ring 128, the other abutment will be moved into the path 0 said lue'. W'hen the lug; 1-:50 released the friction rollers are spring-pressed into operative positions to connect the clutch members. Thus when one of the abutnients 132 is disei'lgagred from the lug 130. the clutch operates to inn part a half revolution to the cam shaft (52 and is then arrested by the engagement of the lug 130 with the other abutment.

The cznn path 120 is so designed that the presser roll 14 will be ra sed and lowered at each halfrevolution of the cam disk. During the first half rotation of the cam disk the movements derived therefrom are timed to liftthe presser roll from the blank after the breast margin of the blank has been skived, thus permitting; the gripper device 30 to reposition the blank for the skiving of the toe margin thereof. Before the movement of the cam disk is arrested the presser roll lowered into engagement again with the blank to enable the presser roll to cooperate with the feed roll 1 in the further feeding of the blank. During the second half rotation of the cam disk in each cycle of operations. the cam disk 58 functions to lift the presser roll from the work to free the work after its entire margin has been skived and thereafter to lower the presser roll into engagement with the next blank to be operated upon.

In order that the prcsser foot 26 shall be raised and lowered siinultaueously with the raising and lowering of the presser roll 11.. the presser foot is carried by the frame or support 73 for the prosser roll carrier. its best shown in Fig. 5, the presscr foot 21' is carried at the lower end of a 1 cm 150 that is Slidable in a beariiu 152 formed on the carrier support 78. The presser foot is urged downwardly by a spring 15 1 which is coiled around a reduced portion of the stem 150, the spring hearing at its lower end againsta shoulder on the stem and at its upper end against a shoulder within the bearing 152, said spring being compressed ion lllf) lit) between said shoulders when the presser foot is in engagement with the work. The stem 150 is reduced at its upper extremity and projects above the bearing 152 and a collar 156, fixed to the projecting portion of the stem, co-operates with the upper end of the bearing 152 to limit the downward movement of the presser feet when the latter is raised above the work.

It is usually desirable to skive the breast margin of a box toe blank at a somewhat sharper angle than the margin around the toe thereby producing a widerscarf at the breast than at the toe. The angle of the scarf is varied by tilting the presser roll a .tially to vary the relation of its profile to the knife edge and thus to vary the transverse angular relation to the knife edge of. the marginal portion of the blank which is being ted to the knife. The segmental presser roll carrier Tl is oscillated bodily with respeetto the carrier support 78 for the purpose of tilting the axis or the presser roll as hereinbetore explained. This oscillatory adjustment of the presser roll carrier Tel; is obtained by the action of a crank'pin 160 (Figs. 5 and 6) which projects tl'rom one end of a horizontal. stud shattt 162that is journaled in the solid upper portion of tl e presser roll carrier support or frame 78. The crank pin 160 works in a verticallyelongated slot 16st that is formed in anarin 166 which rigidly secured to the presser roll carrier. is shown in Fig. 6, the arm 166 is secured to the carrier Tet by means 01 a screw 168 and is extended outwardly and upwardly from said carrier to avoid inter terence with the carrier support or tt'ran ie The stud 162 that carries the crank pin 160 at one end, has fixed to its opposite end a pinion 1'70 and interineshing with said pinion is a driving gear 172 which ispivotally mounted upon the side 01' the carrier support 78 and provided with tour plus 11 1 which project from its outer face in equally spaced apart relation. Arranged to engage one of the pins upon each upward movement of the presser roll carrier support is a pawl 176 which depends from a pivot stud carried by a portion ol the standard 86, the pawl being provided with a. laterally oll'set weighted portion 178 at'its upper end which functions to hold the lower extremity of the pawl. in cooperative relation with the pins 11. 41 on the gear 172. The arrangement is such that upon the upward movement of the presser roll carrier support- 78 the pin 17% nearest the pawl 176 will engage a shoulder 180 on the pawl and the relative n'ioven'ient between said support and said pawl will cause the gear 172 to be turned through ninety degrees. The diameterot the gear 172 being twice that ol the pinion liOpthe latter will be turned through halt a revolution by the quarter turn o'li the gear 172 and the crank pin 160 will be actuated to oscillate the presser roll carrier and thus to tilt the presser roll to vary its axial angular relation to the knife edge. The changed relation of the presser roll to the knife edge is such that when the presser roll is subsequently depressed into engagement with the margin of the blank, said i'nargin will be presented at a somewhat greater angle to the cutting edge of the knitte and thus the scarf produced by the knife will be some-' what narrower and less sharply inclined.

After the breast margin of the blank has been skived, the blank is swung bodily in its own plane about the corner last acted upon by the knife to reposition the blank with its curved toe edge tangent to the edge gage preparatory to the skiving of the toe margin of the blank. This repositioning of the blank is ell'ected by means of the grip per device 80. This device comprises an arm 184 which extends radially from a sleeve 186 which surrounds the upper portion of the spindle 8O otthe presser roll carrier support, said sleeve being interposed between said spindle and the bearing 82 on the standard 86. The loWer extremity of the sleeve 186 rests upon the bearing .84 which is also formed upon the standard 86 and in which the said spindle 80 isjournaled. As hereinbefore described, the radial arm 18 1 is formed at its outer end with a depending portion 188 carrying laterally projecting bearing lugs 190 (seel igs. 3 and within which is slid-ably mounted a vertical spindle 192. At its lower end the spindle 192 is provided witlra foot 194 carrying a plurality of spurs or prongs 196 which project downwardly from said foot and extend through apertures in a stripper plate 198 carried by the depending portion of the gripper arm. Normally the foot 194-. is maintained in its elevated position, with the prongs 1.96 retracted so that their points are shielded within the apertures 01 the strip per plate and are thus maintained out of the path of feed of the blank. The foot 194: is held in its elevated position by means of a shoe 200 which is located in a recess in the side of the lowermost bearing 190 and is trictionally pressed against the spindle 192 by means of a screw 202 and spring 203. During the skiving ot the breast margin of. the blank the arm 18 1 is positionedas shown in Fi 1, but after the breast margin has been skived the toot 194 is first depressed to project the prongs 196 into. the race of the blank and then the arm 18lis oscillated to swing the blank into the dotted line position designated 32 in Fig. 1. The means for depressing the foot 19% to project lltl the prongs 196 into the blank coi'uprises a cam lever 208 which is fulcrumed upon the pivot rod 112 liieside the lever 110. One end of the lever 208 carries a cam roll 210 wh ch rides upon the periphery of the cam disk 58 and is adapted to be engaged and lifted by a cam projection 5312. The other end of the lever 208 projects into position to overlie the spindle 192 when the arm an is at rest in the position shown in Fig. 1. Upon movement of the lever 208 by the cam projection 212, the spindle 192 is pushed downwardly in its bearings 190 and the prongs 196 are caused to penetrate the material of the blank.

The rocking of the arm 184; .lior the purpose of repositioningthe blank for the skiving of the toe margin thereof is effected by means or a gear segment .316 which is attired upon a vertical rockshatt 218 that is mounted in hearings on the standard 86. The teeth of the gear segment interniesh with segmental gear teeth 5220 upon the sleeve 186 of the arm 18 1. The rock shaft 218 is actuated by a connecting rod that is pivoted at one end to an arm 2241-. last on the rocksha'lt 218 and at the other end to the feed plate actuating lever 50 at a point in line with the corresponding end of the connecting rod 60. As the arm 1& swung about the axis of the spindle 80, the blank, which is impaled by the prongs 196, is moved over the surface of the feed table, the blank turning about its corner 226 as an axis (which corner is then positioned beneath the presser roll) until the curved edge of the toe margin is brought into engagement with the yielding edge gage 92. Just prior to the completion of its turning movement over the feed table a laterally projecting pin 228 on the spindle 192 is caused to ride over the inclined face of a fixed cam 230 carried by a portion of the standard 86, this action raising the spindle 192 and elevating the foot 194 to retract the prongs 196 above the lower face of the stripper plate 198. lhe stripper plate then functions to strip the blank from the prongs leaving the blank tree to be acted upon by the :t'eed roll.

After the blank has been thus positioned for the skiving oi the toe margin thereof, the presser roll and presser 'loot are lowered by the action of the cam lever 110 during the latter part of the first hall rotation of the cam disk. As soon as the blank is engaged by the presser roll and pressed thereby against the feed roll, the blank is fed again past the rotating skiving knife, the presser foot also engaging the blank and, by means of the frictional drag exerted thereon causes the blank to turn in its own plane as it is led so that its curved toe margin will be held continuously against the edge gage 22. The clutch (ii is thrown out after the presser roll and presser foot haw been lowered and the latter are maintained in their lowered or operative positions until after the toe margin of the blank has been completely skived. The lever 134 has then been moved into such a position that the controller ring 128 is again released and the clutch thrown in to cause the presser roll and presser foot to be raised :l'or the second time in the cycle for the purpose of releasing the completely skived work. Upon this second uliiward movement oil the presscr roll the crank pin 166 is actuated to shift the presser roll carrier back to its original angular relation to its support and thus to position the presser roll to cause the breast margin of the succeeding blank to be skived at the proper angle. Inasmuch as the crank pin is turned through 180 at each upward lllOVGlIlGllb oi the presser roll it will be apparent that when the presser roll is raised for the second time in each cycle of rniierations the crank pin will be returned to the position which it occupied at the startof the cycle and consemientlr the presser roll will be restored to its initial axial angular relation to the knife edge. This arrangement insures that the breastv margins oi? all blanks operated upon will have the same angle of bevel and also that the margins around the toe will all be skived at the same angle.

Although the invention has been set 'lorth as embodied in a machine lor skiving box toe and similar blanks, 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 nor to operation upon any particular kind of blank.

l-liaving described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for skiving blanks, the combination of a skiving knife and means initially operative to feed the blank and subsequentl; to act as a guide to control the direction oi. travel of the blank past the knit]- to produce a scarf ol uniform width along one edge of the blank.

2. In a machine for skiving blanks. a magazine, a skiving knife, means to detach a single blank from the magazine, said means being constructed and arranged to form an edge gage, means for feeding a blank past the knife, and means imlepemlcnl oi said feeding means for maintaining one edge of the blank in contact with the edge gage throughout the feeding movement.

3. In a machine for skiving blanks, a skiving knife, means to feed the blank past the knife, a presser roll for maintaining the edge margin of the blank in operative engagement with the knife during the feeding operation. means to vary the angular displacement oi the presser roll with respect to the feeding means to permit the edge nnirgin of the blank to be presented to the kni to at various desired angles, an edge gage, and frictional means to maintain the edge of the blank in luu till

guiding engagement with the gage during the feeding and cutting operations.

t. In a machine for bevelling the margin of a blank, a skiving knife, means for effecting relative movement lJGfWGIl the knife and the blank and means operating after a portion of the margin of the blank has been beveled to vary the transverse angle of presentation of the blank to the knife to vary the angle of bevel produced at another por tion of themargin of the blank.

5. In a machine for operating on blanks, a skivin'g knife, a magazine, a feed member, means for operating the feed member to feed a blank from the magazine to a position in proximity to the knife and for holding the feed member stationary to guide the blank during movement of t 1e blank past the .mife, means for feeding the blank past the knife, and means engaging the surface of the blank for frictionallyopposing the feed movement of the blank past the knife to cause the blank to be held against said feed member while being cut by the knife.

(3. In'a machine for skiving blanks, a skiving knife, means for relatively moving the blank and knife to skive the margin of the blank progressively and entirely round the blank, and means to vary the transverse angle of presentation of the blank to the knife at a predetern'iined point in the relative travel of the knife and the blank to vary the angle of bevel produced by the cutting operation.

7. In a machine for skiving box toe blanks or the like, a rotary cylindrical skiving knife, feed rolls for feeding a blank to the knife, a magazine for holding a stack of blanks, and means for feeding a blank from the magazine and delivering it to the feed rolls in such a position relatively ,to the knife that the breast margin only of the blank will be presented to the knife, said'feeding means being constructed and arranged to Serve as aguide for the blank during the cutting operation thereon.

8. In a machine for operating upon blanks, an operating member, feed rollsfor feeding a blank to said member, a magazine for bolding a stack of blanks, a pusher forengaging one edge of the endmost blank in the stack and delivering the blank to the feed rolls in position to have the margin adjacent to said edge fed to said member, said pusher being adapted to remain stationary while the blank is being thus fed to serve as an edge gage to guide the blank.

9. In a machine for operating upon blanks, an operating member, a feed table, means for feeding a blank across the table and past said member. an edge gage on said table for guiding the blank as it is fed past said member,

said gage being beveled to permit a blank to be fed transversely across the gage and substantially at rightangles to the direction of feed of the blank pastsaid member, and

means for feeding the blank transversely across said gage into position to be guided blank past the knife to skive one edge of the blank, and means for swinging the blank about the apex of the angle formed by the edges of the blank after the first edge has been skived to position the blank forv the skiving of the other edge thereof.

12. In a machine for skiving blan haw ing oppositely and unsymmetrically disposed edges, a skiving knife and automatic means for relatively moving the knife and the blank to skivejthe margin of the blank progressively and entirely around the blank.

13. In a machine for skiving blanks having oppositely and unsynnnetrically disposed edges, the combination With a skiving knife, of automatic means for feeding the entire margin of a blank progressively to the skiving knife to effect the skiving of the margin entirely around the blank.

1%. A machine for operating upon a blank in two localities which extend at an angle to each other having, in combination, mechanism for operating upon the blank, means for feeding the blank to the operating mechanism in position to have one locality operated upon, and means for repositioning the blank relatively to the feeding means after the operati-ei'i upon one locality has been completed to cause the blank to be fed a second time to the operating mechanism in position to have the other locality operated upon.

15, In a machine for skiving blanks havin two edges which meet at an angle to each other, a skivingknife, means for feeding and guiding a blank relatively to said knife to cause the blank to be skived along one of said edges, and means operative after said edge has been skived for varying the tran verse angular relation of the other edge and the skiving knife to cause the edges to be skived at different angles.

16. A machine for operating upon a blank in two localities thereof having, in con'ibinatien, operating mechanism, means for feeding the blank to said mechanism to cause the blank to be operated upon in one locality, and means becoming operative after the operation upon one locality has been completed for repositioning the blank with respect to the feeding means preparatory to a second presentation to the operating mechanism and for changing the relation between the feeding means and the operating mechanism.

17. A machine for operating upon a blank in two localities thereot having, in combination, operating mechanism, means for feed ing the blank to the operating mechanism to cause one locality to be operated upon in a given n'ianner, a carrier for receiving the blank after it is so operated upon, automatic means operative to cause the carrier to re- 'iosition the blank relatively to the feeding means preparatory to causing the blank to be led a second time with the second locality exposed to the operating DlQGllEtlllSln, and means for changing the relative positions of the feeding means and operating mechanism before the blank is so ted.

18. In a machine for operating upon the mar s of blanks having two edges arranged at an an le to each other, an operating member, rollers for engaging opposite sides of a blank to feed it past said member, means for guiding and controlling the blank while it is being fed to cause said member to operate upon the margin adjacent to one edge of the blank, means for separating said rolls to release the blank lnon'ientarily after said margin has been operated upon, and means tor manipulatingthe blank while released by the feed rolls to position it relatively to said rolls and operating member for operation upon the margin adjacent to the other edge thereof.

19. In a machine for operating upon the margins of blanks having two edges arranged at an angle to each other, an operating member, rollers for engaging opposite sides of a blank to teed it past said member, means for guiding and controlling the blank while it is being fed to cause said member to operate upon the margin adjacent to one edge oil the blank, means tlorseparating said rolls to release the blank momentarily after said margin has been operated upon, and means for manipulating the blank while released by the feed rolls to position it relatively to said rolls and operating memher for operation upon the margin adjacent to the other edge thereof and for again separating said rolls after both of said m: rgins ha ve been operated upon to enable another blank to be introduced between them.

90. In a machine for operating upon lJllll lks having two edges arranged at an angle to earl other, an operating tool, a l'eed table, means for feeding the blank along said table and guiding it to cause said tool to operate upon one edge oi the blank, means including prongs adapted to penetrate the material of the blank for shifting the blank upon the table after said edge has been operated upon and relocating the blank upon the table in position to be ted to said tool for operation upon the other edge thereof, and means for stripping the blank from the prongs after it has been thus relocated.

21. In a machine for operating upon blanks having two edges arranged at an angle to each other, an operating tool, a feed table, means tor :teeding the blank along said table and guiding it to cause said tool to operate upon one ei'lge ot the blank, means including an oscillatory arm tor repositioning the blank relatirely to said tool for operation upon the other edge oi the blank, inkongs on said arm For seizing the blank, and means For moving said prongs-i relatively to said arm to seize the blank after one edge has been operated upon and subi'eqneatly to release the blank for operation upon the other edge thcreol.

22. In a skiving machine of the type ha\'- ing a rotary cylindrical skiving knil'e, a feed roll. within the knife, and. a pre ser roll without: the knife eo-operating with said roll to feed the work past the knife. the combination therewith of means tor autoniaticall v separating said rolls during the operation of the machine to permit the work to be repositioned between them.

23. In a .skiving machine of the type having a rotary ovlindrical skiving' knife, :1 teed roll within the knife, and a prosser roll without the knife to-operating with said "teed roll to feed the work past the knife, the combination therewith for adapting the machine to skive box toe blanks, comprising means for separating said rolls alter the breast margin ot' a blank has been skii'ed to permit: the blank to be repositioned relatively to the rolls tor the skiving ol the margin around the toe.

52 i. In a machine for skiving blanka having two edges which meet in a corner, in combination, a rotary cylindrical i-ili'iring knil'e, a feed roll. within the knit. a preset-r roll without the knil'e co-operatiug with said teed roll. to feed :1 blank past the kill I'm and means for momentarily lifting the press-er roll out ol contact with the blank after one o'l its edges has been skirt-d, to pern'iit the blank to be rermsitioned between said rolls tor the skiving oi? the other edge of the blank.

25. In a machine for skiving blanks haw ing two edges which meet in a corner, in combination. a rotary cylindrical skiving knife, a feed roll yieldingly mounted within the knife, a presser roll without the knife co-operating with said 'l'eed roll to teed a blank past the knil'e, and. menus tor momentarily lifting the presser roll out oi. contactwith the blank after one o l? its edges has been skived to permit the. blank to be repositioned liietween said rolls tor the skiring of the other edge of the blank and for tilting said roll to enable it subsequently to of mechai'iism llll loll

Ill)

liitl cooperate with the yielding feed roll to vary the transverse angle of presentation of the blank to the skiving knife to vary the angle of bevel produced by the knife.

26. In a machine for saiving box toe blanks, a skiving knife. means for feeding and guiding a blank relatively to said kniie to canse the blank to be skived along the breast and toe margins thereof, and means vc after the breast margin has been ,3 tow-'ary the transverse angle of presenaiment of the margin to the knife to cause a narrower scarf to be produced around the toe than along the breast edge of the blank.

27. In a machine for skiving ho): toe, blanks, in combination, a rotary cylindrical skiving knife, means including a presser roll for feeding and guiding a blank relatively to said knife to cause the blank to be skived along the breast and toe marg gins thereof, and means operative after one of said margins has been skiveil to vary the axial angle of said presser roll relatively to the skiving knife to cause the other margin of the blank to be skived at a different angle from the first margin, and means operative after the skiving of one blank has been completed to restore the initial axial relation of the presser roll relatively to the skiving knife preparatory to the skiving of another blank.

28. A machine for skiving box toe blanks having, in combination, a rotary cylindrical skiving knife, a feed roll within the knife, a

presser roll Without the knife co-operating With said feed roll to feed a blank past the knife, a feed table, an edge gage, a prcsscr foot for co-operating with the feed table to cause the curved edge of the blank to be held in contact with the edge gagc as the blank is fed, and means for separating said rolls and lifting said prcsser foot after the 171311: has been skived along one of its curved margins to permit the blank to be repositioned relatively to said rolls and the knife for the skiving of the other curved margin of the blank.

29. In a skiving machine of the type having a rotary cylindrial skiving knife, a feed roll Within the knife, and a presser roll Without the knife co-opcrating with said feed roll to feed the work past the knife, the combination tl'icrewith of mechanism for adapting the machine to skive box toe blanks comprising means for swinging the blank in its own plane to change its angular ously operative mechanism for feeding a blank across the feed table and past the knife, a prcsser foot adapted to bear upon the face of the blank While the blank is being fed across the table to hold the cm ed margin of the blank against the edge ga means controlled by a normally inoperative clutch for rendering the feeding mechanism ineffective and for raising the presser foot to release the blank, mechanism for throwing in the clutch after the breast margin of the blank has been skivcd, 1 cans operative While the clutch members are engaged for repositioning the blank relatively to the knife for the skiving of the margin around the toe, and means forthrovving out the clutch after the blank has been repositioned.

31. A machine for operating upon opposite marginal portions of a blank having, in.

combination, operating mechanism, means for feeding one marginal portion of the blank along and past the operating mechanism, and means automatically to swing the blank in its own plane to reposition the blank for operation by the same-mechani n upon the opposite marginal portion there- 0 i 32. In a machine for operating upon a 'to present another side thereof to said operatmg mechanism, and means for feeding the in turn past the.

blank to advance said sides operating mechanism.

In testimony whereof I have signed my name to this specification.

Joan M. 'BENJ'alrHN.

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