US839351A - Paper-cutting machine. - Google Patents

Description

N9. 839,351. v]?ATE1\TTED DEG. 25, 190.6.

S.-K. WHITE. PAPER CUTTING MACHINE. APPLICATION FILED Nov. 4. 1902.

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No. 539,351.. PATBNTED im. 25,1906.

s. K. WHITE. PAPER CUTTING MACHINE. PPPP IOATIONEILED Nov. 4. 1902.'

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110.839,351. PATENTED DEG. 25, 1906.V

s. K. WHITE.

PAPER CUTTING MACHINE.

APPLIGATION PILBD Nov. 4. 1902.-

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No.:8s9,'351. PATENTED DBG.25, 1906' l s. KfwH'ITB, y

PAPER CUTTING MACHINE. l

APPLICATION FILED NOV. 4. 1902.

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UNITED sTATEs PATENT OEEIOE.

.SAMUEL k.. vslfPnTE,y OF BATAVIA, rLLiNois,'AssIefNoaTol s. K. WHITE" COMPANY, A CORPORATION OE iLLiNOis.

t PAPER-CUTTING MACHINE.'

j Specificatonfof Letters, Patent.

Patented Dec. 25, 190e.

Application tiled November lM1902. Serial No. 130,255.

To H' whom; it; rma/y concern:

Beit. known that I, SAMUEL K. WHITE, a citizen of the United States, and a resident of Batavia, inthe county of Kane and Stateof Illinois, have invented certain new and useful' Improvements in. Paper-Cutting Machines, of which the following is a specification.

My invention relates to paper-cutting machines, and" more particularly to a machine for cutting paper in pile form. i

The object of my invention isto so improve the variousfeatures of the `machine as to render the machine more powerful and at the same time more rapid and more accurate and reliable in operation than any cuttingmachineA of the character referred to hereto"- forey devised.

Among the more important features of my invention are improvements inthe construction ofthe cutter-bar and themechanism for operating the saine', including means for Overcomingy the momentum of the cutter-bar and parts connected therewith, improvements in the cutting-bed, and improvements in the paper-clamp and the mechanism for controlling the same. These and other features of the invention will more hilly appear from the following` description. L

The invention consists of the novel parts, improvements, and combinations hereinafter described.

The accompanying drawings, which are rey ferred to `herein and. form a part hereof, illustrate a machine embodying the various features of my invention, the same serving, in

connection With 'the' description herein, to explain the principles of the invention and the best mode contemplated by me of carrying` those principles into effect.

Ofthe drawings, Figure 1 is a vertical' longitudinal section of the machine. Fig. 2 is i an end elevation 'as seen from the left in Fig.

3. Figs. 3 and 4 are respectively a front and rear elevation of the machine. Fig. 5 is'van elevation,jpartly in section, illustrating the details of the cutter-bar and parts connected y A therewith.v Fig. 6 isv a transverse section of I of the construction.

The machineA which is shown :inthe drawper-cutters in which a, straight knife is given a compound movement with relation to a lstationary cutting-bed, said movement be- ;ing known as a draw cut.' lThe machine f shown, moreover, belongs to that type ofreciprocating paper-cutters in which the paperclamp is power-operated and forms a part of the mechanism for producing the desired movements of the cutter-bar. It is to be understood, however, that although certainimthe clamping mechanism the invention as to certain other features is not limited to a machine in which the type of clamping mechan-` ism referred to is employed.

Referring now to the drawings in detail, and more particularly at 4lirst to the4 general views shown in Figs. 1', 2, 3, and 4, the frame members 1 and 2, the lower parts of which are iirmly secured-together by the transverse girders 3, 4, and 5 and by the cutting-tables nand 7 and the upper ends or standards 8 and 9' of which are lirmly secured together by the top girder. 10. The standards 8 and 9 are provided with vertical slots in which the cutter-bar 11 is'accurately guided to move in twoV directions-to wit, upwardly and downwardly :to and -fromthe cutting-table and lhorizontally or in the direction of' its length.

As far as some of the-features of my invention areconcerned, any suitable means may be provided forgiving the cutter-bar its vertical reciprocating or cutting movement. In accordance with thebest embodiment of the invention, however, the means shown for reciprocating the knife are used, and these means constitute one of the principal features of my present invention. In accordance with the embodiment of this feature of Asuitable guides on the outer sides of the standards 8 and 9, said bars being provided with vertical slots that embrace the cutterbar, as clearly shown in Fig. 2. In accord*- ance with the best construction each of these bars has a double-bearingconnection withthe cutter-bar 11, one of said bearings consisting of therollers 14 and 15, pivot'ed on transverse studs connecting the opposite my invention vshown a pair of slide- bars 12 and 13 are mounted to slidevertically in ings as embodying the various features of my V invention is of that type of reciprocating'paportant features of the invention relate tor of themachine consists of two vertical side Y IOS sides of the said bars and adapted to engage with the upper and lower surfaces of theI slots 16 and 17 of the cutter-bar, and the other of said bearings consisting of the plates 18 and 19, located at the tops of the slots in the slide- bars 12 and 13 and adapted to slide on the upper surface of the cutter-bar 11.

In order that the bearings 14, 15, 18, and 19 may be accurately adjusted with relation to each other to evenly distribute the pressure, means'are provided for adjusting the plates with relation to the slide-bars, the adjusting means shown consisting of set -screws 2O and 21.

Any suitable means may be employed for reciprocating the slide- bars 12 and 13. accordance with the best construction, however, the means shown are used, said means constituting one feature of the present invention. As shown,vthe slide- bars 12 and 13 are connected by means of links 22 and 23 with the short arms 24 and 25 of a pair of levers, which, as shown, are pivoted at the opposite ends of the transverse shaft 26, journaled at a suitable point in the said frames 1 and 2 below and preferably somewhat to one side of the vertical plane of the slide- bars 12 and 13. Any suitable means may be provided for operating said levers. Preferably, however, they are operated by means adapted to give them a slow powerful movement in one direction and a quick return. As shown, said levers are provided with the elongated rearwardly-extending arms 27 and 28, which are slotted on their inner surfaces to receive a pair of crank-pins carried by large gearwheels 29 and 30,fiXed to the opposite ends of a transverse shaft 31, journaled at a suitable point in the opposite side frames 1 and 2. The gearwheels 29 and 30 are driven in .unison by a pair of pinions, one of which is shown in Fig. 2, said pinions being affixed to the opposite ends of the shaft 33, suitably journaled in the side frames 1 and 2. The shaft 33, in accordance with the construction shown, is provided at an intermediate point` with a gear 34, which is driven by a pinion4 35, fiXed to the power-shaft 36, said power? erating-levers are so arranged with relation to the arms 27 2 8 of said levers and to the links 22 and 23 that the arms 24 and 25 and the links 22 and 23 approach the position of alinement with each other as the bars 12 and 13 near the limit of their upper stroke. By reason of this construction the said arms 24 and i25 and links 22 and 23 act somewhat like toggle-joints to reduce the motion of the slide- bars 12 and 13 with relation to the movement of the power mechanism. The cutterbar and the parts connected therewith are thus brought to a very gradual rest, and the thumping or jarring that would otherwise result is effectually prevented.

The cutter-bar 11 is provided in the usual manner with a suitable knife 40, and the cutting-table 6 7 is provided with a suitable stationary cutting-bed 41, with which the knife cooperates. For the purpose of vfirmly supporting the cutting-bed 41 throughout its entire length to prevent the same from yielding under the action of the knife the top of the girder 5 is accurately fitted to the under surface of the table 7 directly beneath the cutting-bed 41, and said girder is provided with a vertical web which is arranged in the cutting-plane and extends as far as pos* sible toward the base of the machine.

The clamping mechanism and the connections thereof with the cutting mechanism will nextbe described. As shown. the paperclamp consists of an upper power-section 45 and a lower clamp-section 46, both said clamp sections being ilitted to slide verlically in suitable grooves in the standards 8 and 9 directly to the rear of the cutter-bar l l For moving the clamp downward into an even-pressure contact with the pile of paper during the cutting operation and at the same time to give the cutter-bar a movement in the direction of its length during the cutting operation a diagonal slot-and-pin connection is provided between the clanp and the cutter-bar. As shown, the cutter-bar is provided on its rear face with diagonal grooves 47 and 48, (see Fig. 5,) and the upper section 45 of the clamp is provided near its lower edge with stud-rollers 49 and 50 in position to engage the lower ends of said grooves when both the cutter-bar and the clamp are at the limit of their upper strokes. The grooves 47 and 48 may, as far as some of the features of my invention are concerned, be extended clear through the cutter-bar, so as to form open slots therein, as is the, usual construction in this type of cutter. In accordance with my invention, however, these slots are closed, the maximum strength and sti'ness of the cutter-har being secured by the lconstruction shown.

By reason of the fact that when the machine is in operation the clamp reaches the limit of its upper stroke in advance of the cutter-bar 11 the clamp is not cushioned by the toggle-like action of the links 22 and 23 and arms 24 and 25. ln accordance with my invention, therefore, special means are pro vided for gradually alsorbing the momentum of the clamp. Any suitable device may he employed for this purpose. ln the machine. shown two forms of cushioning devices are IOO TIO

us'ed. One ofv these devices consists of a pai-r ofy spring-pressed.lplungers arranged at the opposite ends of the clamp-section 45. One of said spring devices isshown in detail in Fig. 7, the'same-consi'sting of a plunger, fitted in a suitable socket 54 in the clampsection andpressed upwardly by a helical spring 55 which isl confined between a shoulder' onthe-'plunger and the 'bottom of. the socket 54. The upward motion of the plunger isad'justably fiXed by the nut 56, which is threaded on they lower end of the plunger and. in. position to engage the under side of the socket.. Suitable brackets 57 and 58 are. secu-redl to the inner sides of the standards 8 and 9 in position to engage the plungers 52 and 53.

Inaccordance with. the preferred construction additional cushioning devices in the form of friction-brakes are provided. As

show-n, these friction ldevices consist of a pair of vertical friction-blocks 59 and 60, aflixed to the rear surface of the clamp-section 45, near the opposite ends thereof, in position to enter a correspondingpair of friction- sockets 61 and 62 as the clamp approaches the limit of its upper stroke, said blocks being suitably secured, asv by means of the brackets 63 and 64, to the standards 8 and 9. The friction-blocks 59 and 60 are preferablyslightly tapered in the direction of their vertical movement, and the sockets 61 and 62 are correspondingly tapered, so that the pressureon the-friction-blocks 1s increased as the clamp nears the limit of its movement in the upper direction; The inner surfaces ofthe friction-sockets may be provided with a liningv 65 of a suitable friction materiali" Preferably, also, means' are provided for adjusting the width of the friction-sockets.

. As shown, one side of the socket is provided with. aremovable part 66, which is held in position by bolts 67 in such a manner that packingmaterial may be inserted" between the part 66 and the side of the socket. vVlith the object in view of readily releasing the clamp from the friction devices at the begin-ning of its downward movement the friction-sockets 62 and-63 are, in accord-'1 ance with theconstruction shown, provided with wedge members 68, which. are held against upward movement, but are free to move downwardly with the friction-blocks 59 and 60, and thus relieve the pressure thereon, suitable springs 69vloeing provided.

to return the wedges 68 in position to grip the'friction-blocks 59 and 60 on their return movement. Any yother suitable means for releasing; the'- friction-blocks 59 and 60 may of course be provided. As the cushioningsprings 55 are .under compression while. the clamp is at' the limit of its upwardv stroke,.said springs will act to assist the cutter-bar in releasing the clamp from the 4friction devices, and thus make certain that the clamp-Willstart' downwardly withthe cutter- I movement is largelyk dependent uponv the l sharpness of. thesknife, it is desirable in order v to control the pressure of the clamp on the paper' to provide some means for varying. at willL the resistance of. the` cutter-bar to a movement in the direction of its length. Any suitable means` may be provided for this purpose.I In accordance with the embodiment of the machine illustrated a friction bar or rod. 70 is arranged above andlparallel tothe cutter-bar 11, said friction-bar 7 0l being., secured at its opposite ends to the upper ends of the slide-bars l2 and 13. -Mounted onthe upperA part of the'l cutter-bar 11 lin position to engagev the friction-bar 70 is an adjustable friction clamp 71;. As shown, this clamp consists of a pair of oppositely-arranged jaws 72 and 73, which are freely pivoted at one end on the bar l1 and are formed? at their opposite ends toy embrace the friction-bar' 70, suitable clamp-screws 74 and 75 being provided to vary the pressure of the jaws. 'sure ofthe clamp on the paper i'sinsufiicient, it may be increased by increasing the-friction on the bar 70; On the other hand, as the knife becomes dull the resulting increased pressure may beV relieved 'by loosening the friction on the bar 70.

With the object inview of bringing the clamp down on the pile of paper without operating the cutter, asisrequired4 to. accurately set the pile Iof paper in the machine and to cut certain kinds of stock with. accuracy, the lower orl clamp section 46 ofthe clamp is made movabley independently of the power-section 45, and means are provided whereby the clamp-section 46` may bemoved into and out of contact with the paper manually and without starting the cutting mechanism. In accordance withtheconstruction shown they section 46 is secured to the upper end of a air of'vertically-movable slide-bars 75, which are located in suitablel grooves in the standards 8 and 9 andare extended downwardly to a suitable point below the table 6. The bars 76 are connected at their lower ends to the opposite ends of a vertically-movable transverse frame 77, which is A connectedkat points near its opposite ends to a suitable treadle 78 by means oflinks 79. The treadle 7 8 is preferably made nearly as wide as the machine and is pivotally connected atthe op osite sides of its rearr end to the lower part o the back girder 3. By reason of this construction it will be seen that pressure applied at any point along thel front vof the treadle -will move the clamp-section 45 yof the clamp downwardly at bot sides with If it is found that the presl ISO equal force. For the purpose of counterbalancing the clam the lower ends of the vbars 76 are connecte by means of links 80, with one end of the levers 8l, which levers are fulcrumed at an intermediate point on the transverse shaft 82 and are provided at their opposite ends with counterbalance-weights 83. Means are preferably provided also for producing a counterbalancing force which increasesk as the clamp approaches the limit of its upper stroke, so as to assist in a measure the devices hereinbefore described for overcoming the momentum of the clamp. As shown, this means consists of a tensionspring 84, which is fixed at one end to the girder 3 and at the opposite end to an arm 85, carried by the rock-shaft 82 and so arranged that the tension of the spring increases as `the clamp nears the limit of its upper stroke. For the purpose of bringing the clamp-section 46 into contact with the paper by hand with the force required to hold the same during the cutting operation a pair of vertically-moving plungers 86 and 87 vare mounted in the top girder 10, the same extending downward through suitable open* ings in the upper clamp-section 45. The plungers 87 are provided at their upper ends vwith suitable racks which are engaged by suitable pinions 88 and 89, mounted on a transverse shaft 90, which is suitably journaled in boxes carried by the girder 10 adj acent to the plungers. The shaft 90 may be operated by any suitable means. As shown, it is provided at one end with a worm-wheel 91, which engages a worm 92, carried by the vertical shaft 93, journaled in suitable brackets carried by the standard 9. At its lower end the shaft 93 is geared to a short horizontal shaft journaled in a bracket 94 and provided at its outer end with a hand-wheel 95. Both the foot and hand operating means for the clamp are usually used in conjunction with the power-clamp, either to aid in setting the stock in the machine or to increase the clamping power or for both purposes. When, however, small cuts are being made or for other reasons extremely light clamping is desired, the foot-clamp may be used alone or it may be supplemented by the handclamp, the ower-section 45 being locked at 'the upper imit of its stroke by suitable means, as the pins 69a, removably itted in suitable openings in the frictionfsockets 61 and 62 below the blocks 59 and 60.

The operation of the various parts of the machine having been fully described in connection with the construction thereof, further description of the operation will be unnecessary.

My invention in its broader aspects is not limited to the particular construction shown norto the particular construction by which it can be carried into effect, as many changes may be made in the construction Without departing from the main principles of the invention and without sacrificing its chief advantages.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a paper-cutting machine, the combination of a cutter-bar and mechanism for reciprocating the same, said mechanism consisting of a lever pivoted in operative relation with each end of the said bar, connections be tween one arm of each lever and the corresponding end of the bar, and power devices for operating said levers, each of said connections including a link pivoted to the corresponding lever-ar1n and arranged to approach close alinement therewith as the bar nears the limit of its return stroke, whereby the cutter-bar is gradually brought to rest on its return stroke, substantially as described.

2. ln a paper-cutting machine, the combination of a cutterebar and mechanism for reciprocating the same, said mechanism consisting of a lever pivoted in operative relation with each end of said bar, connections between one arm of each lever and the corresponding end of the bar, and power devices for operating said levers to reciprocate said cutter-bar with a quick return stroke, each of said connections including a link pivoted to the corresponding lever-arm and arranged to approach close alinement therewith as the bar nears the limit of its return stroke, wherebythe cutter-bar is gradually brought to rest on its return stroke, substantially as described.

3. In a paper-cutting machine, the combination of a cutter-bar and mechanism for rcciprocating the same, said mechanism consisting of a lever pivoted in operative relation with each end of said bar, connections between one arm of each lever and the corre* sponding end of the bar and power devices for operating said levers, each of said connections including a slide adapted to engage the bar and a link )ivoted to the slide and to the corresponding lever-arm and arranged to approach close alinement with the lever-arm as the bar nears the limit of its return stroke, whereby the cutter-bar is gradually brought to rest on its return stroke, substantially as described.

4. In a paper-cutting machine, the combination of a cutter-bar and means for reciprocating the same, said mechanism consisting of a lever pivoted in operative relation with each end of said bar, connections between one arm of each lever and the corresponding end of the bar and power devices conslsting of a crank engaging a groove in the other arm of each lever so as to reciprocate said cutter-bar with a quick return stroke, each of said connections including a slide adapted to engage the bar and a link pivoted to the slide and. to the corresponding lever-arm and arranged to IOO approach close alinementwith the lever-arm asl the'barnears the limit of its return stroke,

whereby thel cutter-bar is gradually brought tofr'es't on itsfreturn stroke, lsubstantially as described.`

Inapaper-cut'ting machine, the combination of'a cutter-bar, mechanism for reciprocating. said bar transversely tothe direc'- tion of its length to cut the paper, said mechanism includinga- -slide arranged-at each end ofthe bar', each-slide having a` plurality of ,bearings on'said'bar in the direction of its cutting movement, means vfor adjusting one of said bearings with relation toy the other, and means forrnoving the cutter-bar the direction of its length during the cutting opera-n ,bearing on said bar' one arranged beyond the other inthe direction of the cutting movement, meansfor' adjusting the slide-bearing with relation-to the other, and means for movingthe cutter-bar in the direction of its length 'during the cuttingoperation, substantially as described. y

7 .4 Ina paper-cutting machine,fthe combination'of acutter-bar, mechanism `for reciprocating said bar, a paper-clamp, connections between the cutter-bar and the clamp where- `by the latter' is operated by and with the cutter-bar, and' means independent of the mechanism for reciprocating the cutter-barfor effectively resistingth'e motion of the clamp as it approaches the limit of. its return move-- ment, substantially as described.

8. In a paper-cutting machine, the combination of 'a cutter-bar, mechanism for reciprocating'said bar, a' paper-clamp, connections betweenythecutter-bar and the clampl wherev by the clanip is operated by and with thecutter-bar, and means consisting of a frictionbrakeA one' membery of which is carried by the fram-er and the other by theA clamp` forretardingutyhe motion' of the clamp as itapproaches the" limit of4 its return movement, substantially as described.

9i Ina paper'- cutting machine, the combination of a vcutter-bar, mechanism for reciprocating-sai'd bar, a paper-clamp, connections betweenvthe cutter-bar and the clamp wherebythe clfamp-isoperated by and with the cutter-bar, and means consisting of a frictionbrake'forretarding the motion of the clamp as'it nears the limit of its return motion, and means for releasing thek brake as they clamp begins its forward stroke, substantially as described. l

10; In ajpaper-cutting machine, the com.- bination of a' cutter-bar, mechanism for recip- Ebetween the cutter-bar and the clamp whereby the clamp is operated by and with the cutter-bar and a friction-brake'- for retarding the motion of the clan-1p as it nears the limit of its return motion, said brake having a springcontrolled sliding bar` to release the clamp-at the beginning of itsforward stroke, substantially as described.

11; In a paper-cutting machine, the combination-of a cutter-bar, mechanismfor reciprocating said bar, av paper-clamp, connections between the cutter-bar and the4 clam-p whereby the clamp is operated by and with they cutter-bar, and means consisting of afriction-brake and a spring' cushioning device for retarding the motionf'of -theV` clamp as it approaches the limit` of its return'moveme'nt, substantially as described.

A12. In a paper-cutting machine, the combination of a cutter-bar, mechanism for 'reciprocating said bar', a paper-clamp, connections between the cutter-bar and the clamp whereby the clamp is operated by and with the cutter-bar, and means consistingof a friction-brake and a spring cushioning device for' retarding the motion ofthe clamp asv it appr'oaches' the` limit of its return movement, said brake having means for releasing the clamp at'the beginning of its forward vstroke and said cushioning device bei-ng constructed to; assist in starting the clamp on its forward stroke, substantially asdescribed.

131. In a paper-cutting machine, the com"- pbination of a cutter-bar, mechanism forreciprocatmg saldibar, a paper-clamp, connections between the cutter-bar and the clamp whereby the clamp is 4operated by and with the cutter-bar, and means consisting ofa friction-brake for retarding the motion of the clamp nearthe limit of its return motion, isaid brake consisting o f a wedge member afr fixed neareachend of the clamp and frictionsockets aflixed to the frame in position to receive the wedge members as the clamp approaches the limit of its return motion, substantially as described.

14.- In a paper-cutting machine, theA combinationy of a cutter-bar, mechanism for reciprocating' said bar, a paper-clamp, connections between the cutter-bar and the clamp whereby' the clamp is,l operated by and with the cutter-bar, and means consisting of a friction-brake for retarding the motion of the clamp near the limit of its return motion, saidbrake consisting of a wedge member'affixed near each end of the clamp and frictionsockets aflixed to the frame in position to receive the wedge members asl the clamp approachesthe limit of its return motion, each socket having a yielding membery torelease the wedge at the beginning of thev forward motion of the clamp, substantially as described.

15. In va paper-cutting machine, the com-l rocating said bar, apaper-clamp, connections l bination of a cutter-bar, mechanism for re- IOO IOS

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ciprocating said b ar, a paper-clamp, connections between the cutter-bar and the clamp whereby the clamp is operated by and with the cutter-bar, said connections being such that the cutter-bar is caused to move in the direction of itsv length during the operation ot cutting and that the clamping pressure is dependent uponr the resistance of the cutter-bar to movement4 in the direction of'its length, and means Jier varying saii resistance, .substantially as described. v

16. In a paper-cutting machine, the combination of a cutter-bar, mechanism'for reciprocating said bar, a paper-clamp, connections between the cutter-bar and the clamp whereby the clamp is operated by and witfi y the cutter-bar, said connections being such that the cutter-bar is caused to move in the direction of its length duringthe operation of cutting and that the clamping pressure is dependent upon the resistance of the cutter-bar to movement in the direction of its length, `and'means consisting of an adjustable triction d evice for varying said resistance, substantially as described.

.17. In a paper-cutting machine, the combination of a cutter-bar, mechanism for reciprocating said bar, a paper-clamp, connections between the cutter-bar and the clamp whereby the clamp is operated by and with the cutter-bar, said. connections being such that the cutter-bar is caused to move in the direction of its length during the operation of cutting and that the clamping pressure is dependent upon the resistance of the cutter-bar to movement in the direction of its length, and means for varying said resistance, said means consisting of alongitudinal friction member carried with the cutter-bar in the direction of the cutting movement but heldagainst movement in the direction of its length and an adjustable clamp axed to the cutter-bar and adapted to engage said longitudinal member, substantinally as described.

18. A paper-cutting machine including in combination ja pair of side frames, a cuttergbar having diagonal grooves extending only part way through said bar, mechanism carried by said side frames for reciprocating said cutter-bar, a cross-girder connecting said side frames, said girder having a web of great width located in the plane of movement of the cutter-bar, and av cutting-bed supported throughout its entire length in the plane of said web substantially as described.

19.A In a paper-cutting machine, the combination with a cutter-bar and means for reciprocating the same, of a paper-clamp having a power member connected to the cutterbar and operated thereby, a clamp member movable independently of the power member, and means for operating the clamp member independently of the power member, and means for locking said power member against scribed.

20. In a paper-cutting machine, the combination with a cutter-bar and means for reciprocating the same, of a paper-clamp having a power member connected to the cutterbar and operated thereby and a clamp inember movable independently of the power member, arock-shai't journaled parallel with said clamping member, an arm affixed near each end of said rock-shaft, connections between said arms and the ends of said clamp member, and means for operating said clam p member independently of the power member, substantially as described.

21. In a paper-cutting machine, the conibination with a cutter-bar and means for reciprocating the same, of a paper-clamp having a power member connected to the cutterbar and operated thereby and a clamp member movable independently of the ower member, a rock-shaft journaled paralle with said clamping member, an arm ailixed near each end'oi' said rock-shaft, connections between said arms and the ends of said clamp member, a foot-lever, and connections between said foot-lever and clamp member for operating said clamp member inde )end ently of the power member, substantially as described.

22. In a paper-cutting machine, the combination with a cutter-bar and means for reciprocating the same, of a paper-clamp having a power member connected to the cutterbar and operated thereby and a clamp member movable independently of the )ower member, a rock-shaft journaled paralle with said clamping member, an arm affixed near each end of said rock-shaft, connections between said arms and the ends of said clamp member, means for operating said clamp member independently of the power member, and means for counterbalancing the weight of said clamp member consisting of balance-weights and a spring so connected to said shaft as to oppose the weight of said clamp with an increasing force as the clamp rises, substantially as described.

23. In a paper-cutting machine, the combination with a cutter-bar and means for 'reciprocating the same, of a paper-clamp havi clamping movement, vsubstantially as de- 6 5 IOO IIO

spring so connected to said shaft as to' oppose I t -bar by means adapted to give the cutter-bar a longitudinal movement during the cutting operation, and a clamp member movable independently of the power member, a plurality of plungers for operating the clamp member, said plungers being provided With rackteeth, a shaft having pinions for operating said plungers and hand-operating means for y operating said shaft, substantially as described.

. 25. In a-paper-cutting machine, the combination of a `cutter-bar having diagonal grooves, studs engaging said grooves, and means for reciprocating said bar, said grooves extending only part Way through said bar., substantially as described.

26. In a paper-cutting machine, the combination of a cutter-bar having diagonal grooves,a paper-clamp'having studs engaging said grooves, and means for reciprocating said bar, said grooves, except for openings adapted to aline with said studs at one part of the stroke of the bar, extending only lpart Way through said bar, substantially as described.

In testimony.vvhereoi` I have `signed my name to this specification in the presence of 3 5 tWo subscribing Witnesses,

. i SAMUEL K. WHITE. Witnesses: K 4

E. S. SMITH, E. SMITH.

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