US1100000A - Paper-cutting machine. - Google Patents

Description

4 C. SEYBOLD. PAPER CUTTING MACHINE. ARPLIUATION FILED 1320.22, 1913.

1,100,000, y Patented 4Junel 16, 1914.

4 SHEETS-SHEET 1.

0. /SEYBOLIL PAPER CUTTING MACHINEI v K AIPPLIOATION PILEDDEO. 22, 1913. f

Patented June 16, 1914-u 1 4 SHEETS*SHEET 2.

n. SEYBOLD.

PAPER CUTTING MACHINE.. APPLICATION FILED/DBO. 2 2, 191,3.v v 1, 1 00,000. Patented June 16, 1914.

4 SHEETS-SHEETS.

Patented June 16, 1914.

4 SHEETS-Smm 4.

CHARLES SEYBOLD, OF DAYTON, OHIO.

PAPER-CUTTING MACHINE.

Specication f Letters Patent.

Patented June .16, 1914:.

Application filed December 22, 1913. Serial No. 808,062.

To all whom t may concern.'

Be it known that I, CHARLES SEYEOLD, a citizen of the United States, ancha resident of the city of Dayton, in the county of ylrfontgomery and State of Ohio, have invented certain new and useful Improvements in Paper-C-utting Machines, of which the following is a full, clear, and exact description, reference being had to the accom panying drawings, forming part of this specification. 4 u

My invention relates to paper cutting machines and consists of that certain novel construction and ar angenient of parts to be hereinafter particularly pointed out and claimed whereby economy of construction is combined withI etliciency in operation to furnish a most powerful and effective machine at a minimum cost of manufacture.

Une of the principal features of my iii-,I ventlon relates to the construction of clamp operating ineehamsm whereby the friction r`clutch which must necessarily he employed 'in coupling the power to the clamp is applied to the driving member of the machine and not to the driven member. lleretofore in all power operated machines With power clamp, the friction clutch for the clamp has been applied to the driven member of the clamp mechanism, so that the. slip, when the clamp has reached and compressed the paper pile, takes place directly between the clamp and the nieiiiber operating it'. lit follows from this that to obtain a hundred pounds pressure for the clamp, the friction clutch must be capable of holding up one hundred pounds.

ln my present invention', l have applied the yfriction clutch to the driving member' and not to the driven membergl so that by proper leverage between the driving and driven members,y the appliaition of twenty live pounds pressure on the friction clutch will hold one hundred pounds pressure on the clamp, and in this way a ratio of tour to one, or any ether desired ratio can be established. ln addition to this improvement on the. application of the clutch mechanism, l also a-rrange to connect the clamp member with the driving mechanism only on the downstroke, the clamp being balanced byweight for the up-stroke so that it can be returned 'to its operative posit ion without the eXpenditure of any power; while in the ordinary constructions the clamp is usually driven by lthe clutch may be readily i rack and segment which is continuously in mesh so that the machine power raises as well as lowers the =clamp member.

Another feature of my invention relates to the knife construction whereby a much stiffer knife can be provided with a decreasing liability to bend under strains. As ordinarily provided, a knife is furnished of sufticient width to perniit of grinding away the Vknife surface for sharpening, and therefore to provide for this the knife is usually secured to the knife Carrier or frame so that its cutting edge extends some considerable distance beyond the holding frame. To overcome this objection, l attach the knife so the cutting edge is closer to the carrier so as to give great stability, and as the knife is worn down in grinding, l provide for the insertion of metal strips to abut against the back edge of the knife, and extend the knife edge beyond the carrier, and Yl arrange for a series ot' bolt holes in the knife blade for the attachment. l

^ Another feature of improvement relates to the friction clutch construction whereby and easily adjusted for the application of increased clamping power at a moment`s notice, and if at the same, time the clutch be set tootight `for the required friction, the pulling screw rod, which is purposely twisted, is intended to stretch should too great a strain be thrown on the clutch. Provision also made to prevent the breakage of any of the machine mechanism should the saine be subjected to extraordinary strain of an) kind, by means ol'l thc'conslruction in which l couple the power shaft to the driving mechanism 0f the machine through the medium of a grooved washer, which washer is-the weakest piece inthe train of mechanism, so that the whsher willbrea k land cut ott tliedriving power before any further damage can be done under undue strains.

Other featuresl ot' novelty and importance will be more particularly pointed ont in comiection with the description. l

ln the drawings, Figure l is a side elevation of the right'hand side of my machine, being the side upon which power is applied. Fig. 2 is a similar side elevation of the opposite side of the niachine,'a por tion of the frame broken a 'ay. Fig. 3 is a front elevation.. Fig. t is a central section of the friction clutch. Fig. 5 is a side view of the saine` showing portions broken away. Fig. 6 is a front elevationuof the friction clutch. Fig. 7 is a perspective view showing the method of securing the knife to the knife carrier. Fig. 8 isa perspective view of one of the extension bars for the knife. Fig. 9 is a perspective view of the inner end of the power shaft. Figs. 10 and 11 are perspective views respectively of the driving pinion and the grooved washer connecting same to the power shaft.

The operating parts of the paper cutter are mounted in a solid and substantial easting 1, forming supporting standards'and framework for the various shafts and operating mechanism of the machine. For economy of construction, all of the bearings for the various shafts are located in aline? ment in this single casting, so that a united structure is provided which can be easilyy finished for the support of all the necessary purposes, instead of requiring cross pieces and side bearings. Mount-ed in suitable bearings in this framework is the driving shaft 2 for the machine, which receives its` power from the power shaft 3 connected by a belt4and pulleywith any suitable source of power, the driving power being communicated through a train of gears and pinions G, 7, 8, to the gear 9 keyed to the driving shaft 2.

The knife carrier 10, rocate in suitable guide slots 11, 11 in the side plates 12, 12 of the framework, is coupled at each end outside thefrainework bythe pulling bars 13, 13, with crank pins 14, 14 on each end of the driving'shaft 2 of the machine, under the rotation of which the knife carrier and the knife attached thereto is reeiprocated in the operation of the machine. The usual power clamp is indicated by dotted lines 15 in Fig. 2, and arranged to be reciprocated in connection arranged to reci pi with the knife to clamp the paper pile, and

to be raised again to normal elevated position lwith each operation of the machine. This clamp bar is suitably guided between the side plates 12, 12, and carries at each end a downwardly projecting bar 1G, 1G. These bars cach carry any outwardly projecting stud or pin 1.7 which is engaged by a bifurcated arm v.18,.each pivoted to the crank arln 19 at either end 20 suitably jonrnaled in the base casting. rllhis rock shaft 20 carries the gear 21 sccurcd thereon, and this gear meshes with a `segment gear 22, which is loosely n'iou-nted on the dri ving shaft 2 of `the machine. 'lhe hub 23 of this segn'ient gear formed with aA friction disk 24, the periphery of which is provided with a friction band 25 of leather, or other suitable material, and this band. isengaged by a splitl frictionV ring, suitably leather-lined, and made up of two halves 26 and 27. This vsplit friction ring is connected at its lower \6Q\portion by the bolt 28, passing through the of a rock shaft` (rig. 4) is lugs 29, 30, on the two halves, with a tension coiled spring 31. posite end of the half ring 2G is provided with a boss 32, in which is mounted a twisted pulling screw rod 33, adjustable by the knurled nut 34. The opposite end of. this twisted pulling screw rod 33 engages a crank arm on the crank pin 35, the crank pin being journalcd in a corresponding boss 36 on the opposed half of the friction ring 27. The crank pin passes loosely through a suitable opening in the disk plate 38, which plate is keyed on the shaft 2. i

The crank pin 35 on the outer face of the disk 38 is provided with a crank arm 39 carrying at its lower depending end a roller 40 which roller bears on the'cam surface of a cam 4l, which cam is loosely mounted on the driving shaft 2. The cam 41 is proe vided with a lateral extension plate 42 which is flat and bears against the frame casting 1 at each end, so as to prevent thecam from turning. The cam is loose on the shaft 2 to slide longitudinally, and the cam is provided with two bearing surfaces 43 and 44, so that either may be brought into operative connection with the roller 40 on the crank arm 39. The cam is shifted by oscillating the handle 45 which is mounted on the segment plate 4G, pivoted at 47 to the frame and carrying an arm 48 with-a stud 49 to engage a grooved` projection on the hub of the cam 41. One of the cam surfaces on this cam is considerably higher than the other, and as either cam is in .operative position, with the rotation of the shaft 2 the crank arm 39 will be oscillated to rock the crank pin and to draw tight or loosen the split friction ring. he disk plate 38 being keyed 'on the shaft 2, with each -rotation of the shaft, the crank arm 39 with its roller 40 is carried around the cam surface and the cam surfacel is so arranged with relation to the movements of the machine that the friction will be applied to the friction ring to cou le the segment driving gear 22 to the sha t 2 only during the down-stroke of the clamp rock shaft 20 with which the segment gear is in connection through the gear 21. The clamp is suspended by chains running over pulleys and having at the lower end a welght to balance the weight of the clamp, and in order to raise the clamp after it has been brought down on the paper by the rocking of the rock shaft 20 through the medium of the hifureated arms 18 bearing on the pins 17 and to return the rock shaft to normal position, l provide a cam 5() mounted on the driving shaft 2, which cam engages a roller 5l on one end of the bell crank lever 52, journaled at 53 in the base. The outer arm of this lever is coupled to a lifting bar 54, pivoted on the arm 19 of the rock shaft 20.

The action of the cam is so timed that after the clamp and provided The ophas been brought down on l thereby for the clamp,

stroke, the clamp will be released and therel upon the cam 50 on .the driving shaft will return the rock shaft to its normal position,V and the Weight descending will raise the clamp to its normal position. Should it be desired to obtain greater clamping pressure, this can be at once provided for by shifting the handle 45 to slidethe cam 41 lengthwise on the shaft to bring the cam surface 44 in contact with the roller 40 on the crank arm 39. If in tightening up the friction clutch by the screw 34, the adjustment is made too tight, instead of too greata friction being applied, the twisted screw rod will stretch without damage to the machine. Y

Having thus described my invention, what claim as new ters Patent, is

l. In a paper cutting machine, the combination with the cutting knife and the clamp for holding the paper pile, of a driving member for the knife and a member driven device coupled to the driving member and connection therefor with the driven member whereby the clamping power may be increased in any desired proportion to the power of the friction clutch.

of a driving sha t and the knife, means for actuating the clamp and connection therefor with the driving shaft and a friction clutch mounted on the driving shaft intermediate the clamp connections, whereby the clamping power may be increased in any desired proportion to the power ofthe lniction clutch.

3. In a paper cutting machine, the combi-` nation with a driving shaft and a driven shaft, of cutting mechanism coupled tothe driving shaft and a clamp coupled to the driven shaft, a friction clutch mounted on the driving shaft and train of gearing conneeting the driving and the driven shafts through the friction clutch, whereby the clamping power may be increased in any dcsired proportion to thepower of the friction clutch. l

4. InI a paper cutting machine, the combination with a driving shaft and a driven shaft, of cutting mechanism coupled to the driving shaft and al clamp coupled to the driven shaft, a traint-xk" gearing intermediate the two shafts, with friction clutch. one memberfoonnected to the driving shaft and the other member to the gear train,whereby the clamping power may be increased in any desired proportion to the power of the frioI tion clutch.

5. In a natio-n with a driving shaft and a driven shaft, of cutting mechanism coupled to the drivingshaft' and a vclampcouplcd to the and desire to secure by Let-- with a friction clutchl paper cutting machine, the combi-` driven shaft, a train of gearing intermediate the two shafts, with the driving gear loosely mounted on the driving shaft and a clutch to couple said gear to the driving shaft.

In a paper cutting machine, the com'- bination with the cutting knife and the clamp for holding the paper pile, of a driving member for the knife and a member driven thereby for the clamp, with 'a friction clutch device intermediate the two members, said frictionY clutch comprising a split ring, and a disk engaged thereby, with means for automatically clamping said split ring on the down-stroke of the knife.y

7. In a paper cutting machine, the combination with the cutting knife and for holding the paper pile, of a member for the knife and a member driven thereby for the clamp, with a friction .clutch device intermediate the two members, said friction clutch comprising a split ring, and a disk engaged thereb with meansl for automatically clamping said split ring on the down-stroke of the knife, and means for releasingthe split ring on the up-stroke of the knife.

8. In a paper cutting machine, the combination with the cutting knife and the clamp for holding the paper pile, of a driving member for the knife and a member driven thereby for the clamp, with a friction clutch device intermediate the two members, said friction clutch comprising a split ring, and a disk engaged thereby, a crank for clamping the split ring, a-nd a cam for actuating said crank to operate same in timed relation to the knife movement.

l 9. In a paper cutting machine, the combination with the cutting knife and the clamp for holding the paperpile, of'a driving member for the knife and amember driven thereby for the clamp, with a friction clutch device intermediate the two members, said friction clutch comprising a split ring, and a disk engaged thereby, a crank for clamping the split ring, and a cam for actuating said crank to operate same in timed relation to the knife movement, said cam provided with a plurality of cam surfaces for varying the throw of the crank and means for shifting either of said tive position.

10. In'a paper cutting machine, the combination withv the cutting knife and the clamp for holding the paper pile, of a driving member for the thereby for the clamp, with a friction clutch device intermediate the two-members, said friction clutch comprising a split ring, and a disk engaged thereby, a crank for clamping the split ring, anda camfor actua-ting said crank to operate lsame inl timed relation to the knife movement, said cam provided with a plurality of cam surfaces for varying the throw of the crank and adapted knife and a member driven l the paper and the knife has been recipro-4 l cated to sever the pile, the cam will then come in contact with the roller- 51 and rock the rock shaft Q back to its normal posi- 5` tion, and the clamp being thus freed from contactv With the clamp-'actuating mechanism, Will\ be carried back to its normal raised position by thefweight. A foot treadle 55 is also provided with a chain 56 which is coupled to the weight so that when it is '-desired to cause the clamp to rapidly approach the paper, the depression of the foot Y lever -Will-raise the weight and allowthe yclamp to descend under 4its own weight.

i5 The return of the rock shaft to its normal y position bythe action of the cam 50 also rotates the gear 21 and the segment gear 22. v The action of the cam 43 on the driving shaft 2 is so timed with relation to the other y movements of the machine that the friction k 'ln this way, the friction clutch acts as a brake in rocking the rock shaft 2O back to its normal position, and prevents pounding. ln order that the cutting knife 57 (Fig.

` 7) mayl always be held. rigldly against the frame plate 5S, I provide a knife. with a series of three sets of bolt holes 5) for attachment to the knife carrier, and in connection withv the knife I provide' two or more bars GO, (il, of different widths. lVhen 10 the knife is first secured to the knife carrier1 these bars are omitted and the knife bolted through the lower set of holes, bringing the cutting edge of the knife only a short distance below the support. As the knife is v ground down in sharpening, l secure the knife to the knife carrier in the middle set and then in the upper of holes and employk therewith one of the bars GO or (il to fill out the width of the knife. In this way.

l'S0-the knife may be at all times maintained rigid and in close contact with the knife carrier frame. A'l'nforder-to insure the machine against breakage of any of ,the gears or the other operating mechanism, l couple the power shaft 3 with the driving pinion (3 by means of a grooved washer 32 (Fig. lll. The driving pinion G is loosely mounted on the power shaft land the end offthis power `^shaft is provided with a tongue or tenon G3 to be brought. in alinement with the tenons (34, G4 on lheside face of the pinion (l, and the pinion and shaft are then locked together by thewasher (32 with its groove '65 v engaging the tongues on the shaft and pinion, and the parts are held together by a screw. This washer' 62 is purposely made the weakest piece in the machine, and therefore, if there is any undue strain thrown on the mechanism, this washer will break and thusnncouple the power shaft 3.

For starting the machine and stopping it at the end of each operation, the usual hand lever G6 is provided for rocking the shaft 67. This shaft carries the usual clutch actuating mechanism, indicated generally without detailed description at GS in Fig. l, which clutch actuating mechanism throws into and out of operation the driving clutch mechanism by which the pulley is coupled to the driving shaft 3. This actuating lever GG is also connected by the link G9 and lever 70 with the roller T1 (Fig. 3) which bears upon the cam disk 72 which is mounted on the driving shaft 2, so that with each rotation of the driving shaft 2 the rock shaft G7 is rocked back to its -normal position to release the driving clutch mechanism and thus stop the machine.

yhave not lthought it necessary to describe in detail the starting and stopping mechanism, as this forms no part of my present invention.

The operation of the machine will be evident from the foregoing description. The pile of paper to be cut is located on the, table top 73 and properly adjusted against the back gage (not shown). The clamp is lowered to the pile by its own wright, the operator depressing the foot treadle 55 to raise the balance weight which is connected to the clamp by chains ruiming over pulleys.v The details of this construction are not shown, as they are old and familiar in the art. rl`he operator then by shifting the hand lever ($6, throws the power clutch into opera tion to connect the machine mechanism with the driving pulley, and the rotation of the driving pulley through the train of gearing rotates the driving shaft 2 of the machine. The cam surfaces on the cam 4l are so arranged that before the knife has reached the pile. of paper to be cut` the crank arm Bl) will be rocked to draw together the split friction ring and frictionally couple the segment gear 2Q to the driving shaft. Under the movement. of the driving shaft, the segment gear rocks the rock shaft 20 and the clamp i compresses the paper within the limits of the holding power of the split friction ring. l'nasmuch.y however, as the .friction clutch is applied to the driving shaft 2, by reason of the leverage of the parts, very much less frictional hold is demanded of the friction clutch to give thc maximum power of compression to the clamp than if the friction clutch was applied directly to the driven members of the clamp. u

The cam surfaces of the cam 4l are so arranged that on the completion of the knife to be shifted.longitudinally oit the driving member to bring either of said cam surfaces into operative position.

l1. In a paper cutting)r machine, the coinbination with a drii'ing shaft and a roel; shaft, of cutting mechanism coupled to the drivingr shaft, crank arms on the rock shafty with slotted arms coupled thereto, a clamp for the paper pile and connection therefor With the Slotted arms, and a train of gearing intermediate the rock shaft and the driving shaft for actuating the rock shaft to depress the clamp.

12. In a paper cutting machine, the coinbination with a driving Shaft and a rock shaft, of cuttingvrnechanism coupled to the drivingr shaft, crank arms on the rock shaft Wit-h Slotted arms coupled thereto, a clamp for the paper pile and connection theretor with the slotted arms, and a train of gear ing.;A intermediate the rock shaft. and the drivin;r shaft for actuating the rock shaft lo de-

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