US1079462A - Leather-skiving machine. - Google Patents

Description

A. M. ALEXANDER. LEATHER SKIVING MACHINE.

APPLICATION FILED NOV. 8, 1909.

Patented Nov. 25, 1913.

6 SHEETS-SHEET 2.

KZNWG A. M. ALEXANDER.

LEATHER SKIVING MACHINE.

APPLICATION FILED NOV. 6, 1909.

3 SHEETSSHEET 3.

29 M566 I 1 I fia/azzzar A. M. ALEXANDER.

LEATHER SKIVING- MACHINE.

APPLICATION FILED NOV,8,1909,

Patented Nov. 25, 1913.

6 SHEETS-SHEET 4.

mzea'sea' f6. )7? @XM I A. M. ALEXANDER.

LEATHER SKIVING MACHINE.

APPLICATION rnmn NOV. 8, 1909.

Patented NOV. 25, 1913.

d SHEETSSHEET 5.

A. M. ALEXANDER.

LEATHER SKIVING MAGHINE.

APPLICATION FILED NOV. 8, 1909.

1,079,462, Patented Nov. 25, 1913.

6 SHEETS-SHEET 8.

Z iaveilfar UNITED STATES PATENT OFFICE.

ALEXANDER M. ALEXANDER, OF BEVERLY, MASSACHUSETTS, ASSIGNQR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

LEATHER-SKIVI'NG MACHINE.

Specification of Letters Patent.

Patented Nov. 25. 1913.

To all whom it may concern:

Be it known that I, ALEXANDER M. ALEX- ANDER, 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 Leather-Skiving Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to leather skiving machines, and more particularly to machines adapted to skive the edges of upper leather or leather of a similar character.

The invent-ion is intended primarily as an improvement in the machine shown and described in the application of George E. \Varren, Serial No. 481,117, filed March 3, 1909, although not confined in its application to such'machine.

The object of-the' invention is to simplify and improve the construction and arrangement of various parts of a machine of this type whereby its operation is rendered more certain and reliable, and whereb the various adjustments requisite for enab 'ng the machine to operate properly in doing various classes of work may be readily and conveniently effected.

To these ends the invention contemplates the provision in a machine provided with a cylindrical knife and a feed roll arranged within the knife to cotiperate with a. presser foot without the knife in resenting and feeding the material to the nife, of novel and improved means for varying the action of the knife upon the material in accordance with the character of the work being performed; the provision of novel and improved mechanlsm forso supporting the feed roll that it may automatical y accommodate self to variations in the position of the resser foot or variations in the thickness of the material bein acted upon; the provision of novel an improved means for supporting and ad'usting the grinder disk by which the cylin rical knife is sharpened;

the provision of-novel and improved means for adjusting the knife longitudinally to bring it into proper relation to the feed roll and presser foot and for firmly retaining the' knife in adjusted position; and the provision of novel and improved means for removing long strips of skiving from the i interior of the skiving knife.

The invention also contemplates the provision of certain further features and combinations, the advantages of which will be obvious to those skilled in the art.

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

In the drawings Figure 1 is a side elevation of a machine embodying the various features of the invention in their preferred forms; Fig. 2 is a plan view of the machine; Fig. 3 is a front end view with the front plate removed; Fig 4 is a rear end view; Fig. 5 is a vertical longitudinal section through the axis of the cutter disk; F ig. 6 is a vertical transverse section on line 6-4), Fig. 2; Figs. 7 to 13 inclusive are detail views of the mechanism for supporting the feed roll; Fig. 14 is a plan view partly in section showing the means for driving the feed roll; F ig. 15 is a detail plan view of the devices for supporting and adjusting the grinder disk; Fig. 16 is an elevation of sectional view on line 17-17, Fig. 16; and Fig. 18 is a sectional view on line 1S--18,

Fig. 15.

'80 the devices shown in Fig. 15; Fig. 17 is a is provided with a cy indrical knife 34% mounted within the casing 1 and projecting up through an opening in the table 2 into position to act upon the material. The material to be skived is presented and fed to the knife 3 by a feed roll 4 arranged within the knife and cooperating with a presser foot 5 arranged without the knife. The periphery of the feed roll is curved longitudinally to correspond to the curvature of the knife edge, and the engaging face of the presser foot 5 is concave, the curvature of its surface correspondin to the curvature of the knife edge. An ad uStable side gage 6 is provided for guiding the edge of the material as it is fed to the knife.

The presser foot is carried by a block 7 mounted to slide vertically in guideways formed in the'end of an overhanging arm 8. The block 7 is su ported by a spring9 which underlies the ead of a stud 10 to the lower end of which the block is secured. The adjusting screw 11 engages the upper end of the stud 10, and by manipulating this screw the vertical osition of the presser foot with relation to t e knife may be readily and conveniently adjusted. In order that the angle of the bevel formed at the edge of the material by the skiving knife may be varied-as desired, the presser foot is so mounted that it may be adjusted laterally as well as vertically. When the lateral adjustment of the presser foot is such that the concave surface of the foot is concentric with the knife, the knife will act along the line parallel to the surface of the presser foot, and when so adjusted the machine may be used for splitting strips of leather or reducing such strips to a uniform thickness. If it is desired to bevel the edge of the leather acted upon, then the presser foot is adjusted laterally toward the right in Fig. 3, and is adjusted vertically if necessary to bring the surface of the presser foot at the left side into a plane tan ent to the cutting edge of the cutter. Wlth the presser foot thus adjusted the knife will act to bevel the edge of the material fed between the feed roll and presser foot, and the angle of the bevel will depend upon the lateral adjustment of the presser foot. In order that a wide variation in the angle of the bevel cut by the knife may be secured, it is preferred to so mount the presser foot that its lateraladjustment is in a line inclined toward the knife in the direction of its travel. That is to say, the presser foot is so mounted that when it is adjusted toward the right or in a direction opposite to the travel of the knife it moves away from the knife, and when adjusted toward the left or in the direction of travel of the knife, it moves toward the knife. By thus mounting the presser foot to move laterally in an inclined line the distance between the surface of the presser foot and the knife at the right side of the presser foot rapidly increases as the presser foot is adjusted toward the right while the relation between the surface of the presser foot and the knife at the left side of the resser foot remains substantially unchanged The presser foot may therefore be readily adjusted to secure either a gradual or an abrupt bevel. Provision for conveniently securing this ad justment of the presser foot is made by mounting the presser foot in a laterally 1nclined guideway formed in the lower end of the block 7, and securing the presser foot in adjusted position by means of a spring pressed locking pin 12, the inner end of which is arranged to engage any one of a series of notches 13 in the back of the presser foot.

The presser foot when adjusted is held in fixed position, and the material should be forced firmly and uniformly against the lower surface of the presser foot b the feed roll 4. In order that the feed rol may thus support the material, re ardless of variations inthe thickness of the material being operated upon, and of variations in the adjustment of the presser foot, mechanism is provided for so supporting the feed roll that it may tip to change its angle with relation to the presser foot and skivin knife, and may move bodily toward an from the presser foot. As shown, the feed roll is mounted upon a stud 14 projectin from a block 15 which is pivotally mounte upon the end of a supportmg lever 16. The pivot pin 17 upon which the block 15 is mounted is so arranged that its axis is in a plane at right angles to the axis of the feed roll. Movement of the block 15 about the pivot in 17 therefore causes a ti ping of the r01 7 to vary its angle with relation to the presser foot in accordance with the variations in the thickness of material, or to change its angle with relation to the skiving knife in accordance with the adjustment of the presser foot. The normal position of the feed roll is determined by two 00 operating stops on the block 15 and lever 16 respectively, which are held in engagement by a torsional spring 18 which surrounds the pivot pin 17 and connects the block and lever. As shown,

and projecting into position to enga e the side 20 of the lever 16 (Figs. 7 and 8 The lever 16 is pivotally mounted upon a supporting rod 21, the axis of which is substantially parallel to the axis of the feed roll and in a plane at right angles to the axis of the knife. Movement of the lever about the rod 21 therefore moves the feed roll bodily toward or away from the knife and presser foot. The normal position of the lever is determined by a lug 22 projecting laterally from the lever and arranged tp engage the end 23 of a slot 24 which is formed in a collar 25 secured to the shaft 21. The end 23 of the slot and the lug 22 thus form a fixed abutment and stop for determining the normal position of the roll supporting lever. The lever is supported in normal position by a torsional spring 26 which surrounds the hub 25 of the collar 25 and is connected with the lever and collar. In order that the force with which the feed roll is pressed against the material may be readily varied in accordance with the character of the material being operated the cooperating stops consist of a plate l9'secured to the block 15 upoh, means "'is .pr0vided for varying the tension on" the torsional spring 26. In the construction shown this} means comprises a sleeve 21 to .which' the end of the spring .26 is secured. This sleeve is-mounted upon arrows; Figs. 11 and 12, the ratchet 27 riding over the teeth 29. and retairiingtlie collar in its-adjusted position. When it is desired to decrease-the ten'sionfon-the spring, the pawl 28 may be'rea'dilyfdisengaged from the ratchet, 29 and turhed-" in -the opposite direction, the pawl being reengaged' with theratchet when the proper adjustment is secured? 'A second .sprihg '3l' may interposed" between the l.ug 22 ahd tlie"end*"of the slot 24 to assist in supportingithe feed roll and holding it yielding ly in'wnormal position. 'case'it is lesired t'o.movethe feed roll. bodily away from'the 'presser foot or knife. this'may be readilyv done by means of' a liaiidle'32'projecting from the lever16.

In order that the knife3fnia'y be readily sharpened "as occasioh may require' the m'aarmj by gmea'ns f of screws '38 passin-gffthrough' "An adjusting screw 'd" ly} and: conve'nie'ntly I r on the arm] a; h i whe longitudinally of ,th.e jkni'fe: in:i accordan'cev adjusting. tliislid up chine is provided 'witli' a 'gr'inding-disk .33. This 'disk isjcarried byga slide 34;: which secured-upon an arm .oijlever 35; The slide. is gu ide d .upon' the arm 235. by a lug. 36 which. projects through a slot. 37' formed in the "slide, tlie-hslide: is; held upon the slots in t he slide. 40 is providedfor r vary the. position:

Jdesired 'to' give with the hevelf whiehv is mounted the knife icd P'Ihe:

upjoncente'rs 5i1 'so thatjthej end carrying;

the gririrllingfwheel may-be r novedv toward and from the l, ni, fe 3.." -Inio'rderthat thearm-3:; may'lie' readily manipulatedto bring 'the -grir'id-i'ng disk ;-into and out offengagemerit with the knife; a-li'nk 42 is j'co nr ected with the front-.end'uof the. arm andus -extended through an opening in the side of tl casirig 1. A-s pring4r3 is interposed liearinfi? toward .the cutter, The outer end gg' a b a nut fizp ovid'ed withalrnurled- .Tlie -nut is held-in position .by. a plate 46,,the :up'per end-of which bitween ajshoulder on .the link and the inner.- side" of the casing, and tends'toforce the of' the link 43; SereW threaded-andis enhead 4:).-

furca ted an engages a-n annular groove- 47 in the nutf V The cylindrical'knife 8 1ssecured upon 1 positionalso serves to'lock the shaft 56 against r0;- 105- j tation so that manipulation .of. the-knurled head 57 Z is prevented-L." l l. henv the nut "60fiisfthe ,skivi'ng knife removes a long c the end of a shaft 48 which is mounted in and presser oot as it is ground away, the

bearing sleeve 49 is mounted so that it may be moved longitudinally, and the rear end of the shaft 48 is connected by a telescoping coupling 50 with a driving shaft 51. In the construction shown the sleeve 49 is mounted tomove longitudinallj in a split bearing 52 formed in a frame 53 which is supported within the casing 1, andis also providedwith bearings for the shaft '51. In order that the sleeve may be conveniently adjusted longitudinally it is providedwith a rack 54 arranged to be engaged by apinion 55"formed on a transverse rod or shaft 56. The shaft 56':is extended out through thesicle of the casing and is provided at its outer end with .a knurled head 57 by which it'r'n'ay be readily rotated in effecting the longitudinal adjustmentof the knife shaft 48. F or" the s'ake of simplicityfthe rodor shaft 56 is also utilized as the means for operating the split bearing 52 to clamp and release 5 the bearing sleeve 49.. shown the inner end of the shaft 56 is provided with a nut andwasher'58arranged to engage the inner side of the bearing 52; and the shaft is also provided with afscrew-g threaded portion 59 at the point where -it pr'ojectsbeyond the casing 1. A nut .60 engagesthe screw-threaded portion 59 and is arranged 'tobear againstja face 61 onthe side of the casing. :By .serewingup} the 1'00 nut 60, the rod 56.maybe operated to contract the split bearing52'and thus clamp the bearing sleeve 49.'firrnlyi'n adjusted I The tightening of the screw 60 screwed away from the faceifili the bearing .52 is released so that thezfsleeve-el9q i may be adjusted loi'i'git'udiniil-l'y',z' '-and the '110 shaft 56' is also unelamp ed sof thatY-it'fm'ay be turned to adjust thesleeve'longitudinsflly .'.In operating upon some classes: work ous skiving orfstrip from.the in'aterlaljahd' in such case thisstrip is liable fiche-engaged by the edge of the knif'ej and'f to be carried.-

u p and 'wourid around the feed :roll or'lotli'erwise interfere with the proper operatiofl-p'f the machine. In order to avoid chine is provided 4 with-a deflector plate 62' arranged in front of-land f'projecting -1nto. the knife into :close proximity to its inner surface beyond the cutting '.poiiit.'-.:'. The;plate is dished or curved so that the skiv ng nf-125. moved by the cutter isengaged by the'pl'a'te and directed out away from its edgeI'Thedeflector plate is preferably :to a

' ley 73 'secured to the 'driving'shaft,'over bracket 63 extending'forwa'rd from-the front end of the frame 53 so that it'may be readily removed in case thema'chine is to be used, upon a class of work which results in the- 6 removal of short skivings or chips.

. The feed roll 4 is driven-through a'shaft v64, the inner endof .which. isconnected through a universal joint withone endof a shaft-65, and the otherend of .which is connected through a universaljoint to the roll. The shaft 64 is providedwith aJvorm wheel 66 which 'is engaged by a: worm '67 (Fig. 15) secured toone end of a shaft 68, the other end of which carriesfa pulley 69. The'sh'aft 68 is driven fromthedriving shaft 51 through a belt 'I'O'W'hich' over the pulley 69 and over a pulley lse cured to the driving shaft. The grinding wheel is driven from thedrivingshaft 51, throughja' belt 72. which p'a'ssesmver apulidler' pulleys 74, and about a pulley secured -tothe grinding disk shaft. '-The idler pulleys-74 are mounted upon a-swin'ging .arm 76 which maybe adjusted through alever '17, to keep thebelt'tight under the'vari-' r ous adjustments-of the grinding disks While itis preferredto employ the specific construction and arrangement of parts shown and described, it will be understoodthzitthis construction and arrangement isnot essential except so'fargasspecifidin the claims, and may be varied and-modified without departing from the invention. Having explained the nature= and "object of the inventi'on, and specifically described bneformjof machine in which it maybe embodied, what I cla-irnais'z f 1.:A. leather 'skivingmachine-, having-,'i i-n 1 combination, tar-cylindricalknife, a'*feed roll within theknife, and a .conca-vefiir'edfpresserY foot without the knife the: 'o'lsit-ion' i'w'hichi ,determines'thezbevel cut avin' provision for',-lateral-.adj ustrnent to"vary- -the'fb'evet=cut I 2,- A leatherskiving r'nac lii-ne,- havng, in coxnbination a cylindricalknife, a. feed-roll.- l .W'ithinlhe knife havingi'ts-periphery curved longitudinallyto correspondf-to th' ciirva-- ture of the lmifeya'nd a-fixedpresserfoot f the. osit-ion o f' whichdete-rmines thef beve'l cut aving an engaging-face curved weara respond'to the-"'curvature of theakn'ife-and havin provision for lateral adjustment-to J vary tie bevel cut by the knife,- substantially 3;. leather 'skiv'in'g 'machine;*having,'- inv combination," a cylindrical knife, "a ';feedgioll within thelrnifeflindf a concave presser-foot lui'ving: provisionffi'for adjustment laterally infli line}. iric lined toward the=knife in the di "rectfon I of. "travel,- substantially I as def-' scribed. I

4. A leather skivlng machine, h8V'1I1g,"lI1

angle of the roll with relation to the Presser foot and knife,- cooperating stops on the 1 .1 ver and block, and a spring-forholding the stops in engagement; substantially as de-' the lever, substantially as'described. v

roll .is mounted,.-'a;':lever inounted to turnaboutf-anaxis jparalleh'tol-thezaxis of. the g Tell; a pivotal. connection" between the block and lever the -axis ofwhich'is located in' a plane atrightmn'gls to the axis of the roll, a; tor'sional spring connecting the lever and block, andcoop'eralting s'tops{on'- the block .tially as described.

combination, a cylindrieal knife, a fixed '65 presser foot having a concave engaging su'rface and having provision for lateral ad justment' to vary the bevel cut by the knife, 5 and a feed roll Within the knife having its peripherycurved longitudinally to, correspond to the curvature of the pres'ser foot, and mountedto yield angularly' and bodily toward and away from the presser'foot, substantially as described. F

- 5. A leather skiving machine, having, in combination, a knife, a presserv foot, a cooperating feed roll, a block on which the roll is mounted, a spring supported lever onwhich the block'is pivotedto tip to'vary the scribed. 6: A leather skiv-ingfniachineg having, in

combination, a knife, a 'pres'sejrfoot," a cooperating fee'droll, abldck on-which the rollis-mounted pivotally supported to tip about an axis located in a -planeat right angles to the axisof the"roll,j a*lever on which the block is -p'ivoted supported to turn about an axis locatedin a plane at right angles to the axis of the knife, a spring be tween the lever and block' for, yieldingly supporting the roll,.-an d-.a; spring supporting .7. A leather'skivingfmachine, having, in

' combination, :0." knife, a presse'r' foot," 9. co-

operating "feed Troll," a block on "which the :andlever held in-engajgirgentbyisaidspring,

substantially. as descri h y-the knif substantiallyfa's described. \combinatiom-a knife, a presserfoot,-. a cooperating feed roll,,a lever on which the 18.;A leather skim-gramme, having, in:

roll is yieldingly mounted to tip to changes} itsiangle with relation to-the 'presser "foot and knife, a torsional springgacting onthe .lcver.to'supportthe*rol l, and means for varying the tension of the spring, substan- "'9. A- leatherskiviiigqnach' 'e,,havi"ng, combination,- a knife, "a press er foot, a 00- operatingfeed'roll f'a -leye'r' on which the roll is y eldi'nglymounted" to tipf-to change:

1 its angle :with' relation to itl1 e:-flpresser foot fund'knife,-a-torsionitls" H 5 the lever hav'in'g" one end coiinetted I t I lever, a sleeve connected to the other n of the spring, and means. for adjushngthe sleeve to vary the tension on the spring,

substantially as describedl shaft, a bearin 10. A leather skiving machine, having, in con'ibination, a knife, a presser foot, a 00- operating feed roll, a lever on which the roll is mounted, a torsional spring having one end connected to the feed roll lever, a sleeve connected to the other end of the spring, a pawl carried by the sleeve, and a ratchet engaged by the pawl to hold the sleeve in adjusted position, substantially as described.

11. A leather skiving machine, having, in combination, a presser foot, a feed roll, a longitudinally movable sleeve provided with a rack, a shaft journaled in the sleeve, a knife mounted on the shaft, a split bearing for the sleeve, a clamping rod for operating the bearing to clamp and release the sleeve provided with a pinion for engaging the rack on the sleeve, substantially as described.

12. A leather skiving machine, having, in combination, a presser foot, a feedroll, a longitudinally'movable sleeve, a shaft journaled in the sleeve, a knife mounted on the for the sleeve, and means for adjusting t e sleeve longitudinally and for clamping the sleeve in the bearing, substantially as described.

13. A leather skiving machine, having, in

combination, a presser foot, a feed roll, a longitudinally movable sleeve, a shaft journaled in the sleeve, a knife mounted on the shaft, a split bearing for the sleeve, and a device for adjusting the sleeve and contracting and releasing the bearing, substantially as described.

14:. A leather skiving machine, having, in combination, a presser foot, a feed roll, a longitudinally movable sleeve provided with a rack, a shaft journaled in the sleeve, a knife mounted on the shaft, a split bearing for the sleeve, a clamping rod for contracting and releasing the bearing, and a pinion on the rod engaging the rack on the sleeve, substantially as described.

15. A leather skiving machine, having, in combination, a cylindrical knife, an arm movable toward and away from the periphery of the knife, a slide mounted on the arm for movement longitudinally of the knife, an adjusting screw for moving the slide, and a gi'inding disk mounted on the slide, substantially as described.

ALEXANDER M. ALEXANDER.

Witnesses WARREN G. OGDEN,

N. D. MCPHAIL.

copiel of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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