US2524917A - Paper-cutting machine - Google Patents

Description

Oct. 10, 1950 v. z. LYNNEJQUEST 2,524,917

PAPER- CUTTING MACHINE Filed March 3, 1947 2 Sheets-Sheet 2 I02 0 /18 I23 A04; 124- i W V.Z.Lynnequ-est Ma fiatented Oct. 10, 19%? UNITED STATES PATENT -OF= F-ICE p p i 2,524,917 H PAPER-CUTTING-MACHINE Victor Z. LynnequestQ OmahaQ NeDr. Application Marchb, met-swarm. vsaoss (011 4 -54) 4 Claims. 1

The present invention relates to the ,art of cuttingstacks of paper-and more particularly tora powersdrivenpaper 'cuttingmachine.

It-is an object of the invention .to provide a device which'compacts aastack of paper .to be cut and locks the stack in a manner preventing :movement and. slightly inadvance of the descending motionrof 'a cutter-or'lmife which severs the stack into two'parts.

As heretofore practiced :in the .art, paperoutters have been providedwith a manually actuated frame screwhavingaa heavys wheel on the upper endlthereofywhereby the. operator would .at first aspinand thenslateritwist'the wheel for causing a bar to descend for locking a'stack of paper upon thecutting table. The operatorafter locking the Istack in this manner, then manipulates a knife attached to the machine of the-prior art, whereby the entireloperation'hasheretofore been time consuming and with anexcessive attendant labor :cost.

Attemptswhave been made'to automatically do these operations and -machines have been provided and employed for severing stacks of paper These :machines have been'so constructed that they employ leather gaskets-operating on ahorizontallyfdisposed shaft to actuate'the clamp vbar whichlocks the stack of paper.

this form of mechanism is'that the 1eathergaskets become-impregnated with oil to such an extent-that they bind upon the slidable bar and lock the bar against the desired motion, where- .upon the bar or-othertparts of the mechanism frequently brealgand it is therefore an object of the invention to providea mechanism which obviates the undesirable features of the prior practice.

Another object of the inventionis to provide a mechanism-which consummates the locking and cutting of the paper automatically and by the useof power rwhereby labor cost is minimized.

Still anotherobjec't of the invention is to prowhich is power operated for producin a clamping effect greater than that caused by the weight a of .the'clamping bar alone.

A further-objeotaof'the invention is to provide A still further object of the invention resides in the provision of i a clutch for many 'other 'uses A dimculty with.

=vide a papercutterhavinga paper clamping bar broken away;

Figure 2 is a 1e'rt end elevation or the device of Figure 11am extra'spnng mechanism employed not'being shown;

Figure 3 is a view in section taken along'the Figure l is adetailed rear elevation ofthe upper section of the paper, cutter, certain parts thereof being broken away;

Figure 5 is a viewin'section taken along the line5- 5of'Figure4.

"Figure'fi is a"d'etai'led-"left-end View of r the clutch mechanismemployed;

Figure? is a viewfinsection-taken alon the line 1- 1 of Figure 8;

Figure 8 is' aview-insection-of the clutch mechanism takenlooking downwardly between the lines 88 andth-elineilll of=Figure 6; and

Figure 9 is a detailed top planv-iew of-an-an- 'nular spring-engaging memberemployed in the invention.

The paper cutting-"machine of this invention includes a tab'le-topiOdor-receiving and upholding paper to be -cut-,-which1atter is placed at [2. The table=topi'll is preferably-oblong and-is supported by four legs [4.

Above each of the ends 0f--the tab1e-topwere a pair of'guide-standards 15,- each standard of a pair being spaced apart sufiiciently for slidably receivingtherebetween a'cutting bladeel 8. The respective pairs "of guide-standards 161 are interconnected at their upper ends by-a b'race m.

-The cutting-blade I8 extends the lengthofthe table In and-is-securely held in :a' blade-holder 22 by means of aseries of bolts 24. "The blade holder 22 is provided with a notch 26 for receiving the'blade' l8-as=-bestshown-in "Figure 5, and is further provided with reinforcing ridges 28 extending transversely and longitudinallythereof.

At one end thebladeflholder 22 is supported by a'pivotally mounted bracket arm'129, thei'arm being attached to thesholderi22 by 'aoin 'tfl and to the brace 20' byra :pin' 32 so that the holder 3 22 may swing downwardly and in a direction toward the standard I6 adjacent the bracket arm 29.

The other end of the blade holder 22 is pivotally supported by a pin 34 in the lower corner of an equalizing lever 36, the latter being triangular and pivotally secured by another pin 38 to the brace 20 and by a third pin 40 to a knife bar pull rod 42. The triangular equalizing lever 36 is so shaped that the pins 38 and 40 are at either side and above the pivot pin 34.

The knife bar pull rod 42 is eccentrically and pivotally secured to a small wheel 44 as'by means of the crank pin 46. The wheel 44 is in turn mounted and keyed to a drive shaft 48, the latter being mounted on suitable framework 49, the latter being preferably secured to the table-legs I4 and the table-top I0. Also keyed to the drive shaft 48 is a large pinion 50 of greater circumference than the wheel 44; and the large pinion 50 is driven by a smaller pinion 52.

The smaller pinion 52 is splined to a shaft 54, and the latter is driven-by a motor, not shown. Assuming that the motor speed is 1700 R. P. M., the said speed is preferably reduced approximately in the ratio of six to one and the pinion 50 is then of a size for rotating one-sixth as fast as the small pinion 52.

The large pinion 50 is provided with a cam 56 of approximately triangular shape, the cam 56 being aflixed to the forward side of the pinion 54. A rock lever 58 is positioned about and extending over the cam 56, one end of the rock lever 58 being pivotally secured, as at 60, to the framework 49.

The rock lever 58 is provided with a rotatably mounted roller 62 mounted thereon in a position for engaging the cam 56. 'The opposite end of the lever 58 from the pin 60 is connected to an upstanding clamp bar pull rod 64.

The clamp bar pull rod 64 is pivotally attached at its upper end to the forward end of a crank arm 66, the rearward end of the latter being secured to a clamp bar shaft 68. The clamp bar shaft 68 is of a length for overlappingthe table I at each end and the shaft 68 is'rotatably held in the open space I2 on the table top ID, the selected place on the paper desired to be out is placed under and in the path of the knife blade I8.

With the rotation of the motor driven pinion 50 in the direction of the arrow 81, the cam 56 will pass by the roller 62, permitting the rock lever 58 and the clamping bar '12 to descend under the infiuence of gravity. The weight of the clamping bar will then hold the paper in position. If desired, and where necessary, additional mechanism, to be later described, may be employed to further urge the clamping bar against the paper 7 with a force in addition to that force caused by by a pair of mounting brackets I0, the latter each being respectively secured to one of a pair of upright standards I6.

A clamping bar 72 is provided for compressing paper against the table top I2, the bar I2 being preferably heavily constructed, wide and flat at its lower end for engaging paper over a wide area. The clamping bar I2 is reinforced by ribs I4 extending both longitudinally and transversely thereof.

The clamping bar 12 is attached to the shaft 68 by means including a pair of vertical legs I6 at opposite ends of the bar 12, each of the legs I6 being pivotally secured at its lower end to a pair of apertured ears I? by means of a pair of pins I8 and 19.

A second pair of legs 80 having their forward ends bifurcated are each pivotally secured to one of the vertical legs 16 by a pin 82. A pair of collars 84 are attached to the rearward ends of the second legs 80; and the collars 84 surround the shaft 68. A pair of set screws 86, extending through the respective collars 84 are for rigidly securing the collars 84 to the shaft 68.

In operation, at times when the above described mechanism is in the position shown in Figure l, the knife blade I8 and the clamping bar 72 are in an up position. Paper, not shown, is then stacked the weight of the bar 12.

As the pinion 50 and the wheel 44 continue their rotation, the pin 46 will pass by a point vertically above the shaft 48 following the passage of the cam 56, past the same point, the cam 56 being to the left of the pin 46 as seen in Figure 1.

The pin 46 will then begin to descend causing the knife blade I8 to define a slicing motion downward and to the right pivoting about the pins 32 and 38, as indicated by the arrows 88. The knife I8 will then slice the paper held by the clamping bar I2.

As the pinion 50 and wheel 44 continue rotation in the direction of the arrow 81, the cam 46 will again raise the clamping bar 12 and knife blade I8 and paper may be again inserted at I2; and the clamping bar and knife will again descend. Such a cycle will continue throughout operation.

When desired or found necessary, additional mechanism may be used to exert a downward force on the clamping bar 72.

Such mechanism preferably includes a second crank arm rigidly secured at its rearward end to the opposite end of the shaft 68 from the first crank arm 66. The forward end of the crank arm 96 is pivotally secured by means of a pin 92 to the upper end of a collar member 94, the latter having a downwardly extending portion to opposite sides of which a pair of flat bars 96 are pivotally secured by means of a pin 98.

The flat bars 96 are maintained spaced apart by the collar member 94 for a purpose later described, and the bars 96 together form what will be termed an elongated member generally designated by the numeral I00 as best seen in Figure 6.

A clutching mechanism is employed for grasppin and later releasing-the bars 96. Such mechanism includes a yoke, the latter including a pair of yoke-plates I02 at opposite edges of the bars 96 and overlapping the bars 96. The yoke further includes a central bearing plate I04 extending between the bars 96, the bearing plate I04 being rigidly secured to the yoke-plates I02 by means of a pair of suitable pins I06.

The yoke-plates I02 are attached by means of a bolt I05 to a spring I01 and the latter is secured to the framework members I6 by any suitable means such as the hook I08, as best shown in Figure 1.

A pair of lever arms arepositioned at opposit sides of the bars 96, the lever arms each being in two parallel arm-portions I I 0, the latter being spaced apart at their outer ends by a pair of cylindrical washers II2, the washers II2 each being held in place by a bolt H4. The lever arm portions IIO have smooth convex arcuate inner ends and are pivotally secured to the yoke-plates I02 at points between the respective ends of the lever arm-portions I I0 by means of a pair of pins The inner ends of each pairof parallel armportions IIO are secured to one of a pair of consense fleeting plates l I8 "by inefla-nsfo'f' the "pins "I ,f as test shown in Figure 8. 'Each ofjtheconnecting platsl I8 are secured 'toa bearing plate I22,'the latter being vertically disposed parallel to the connecting plates M8 for engaging and applying pressure on the flat bars 96. Bolts I24 are t e'dte'seetre ne -connecting plates "I I8 tothe bearihgplates I22, the bolts I2 3 being threadedly received inap'ertures in the plates I22.

Afpair of'channehbar's I28 are respectively rigidly seemed, one each, to the, cylindrical wassers I I 2 and the bars I28e'xtend downwardly converging toward each other and are attached 'at itlieir lower ends to a ring I30. The ring I30 is constructed in'two se'mi-circularparts attached tdgethrby means of bolts I32 thrust through pairs of outwardly flanged parallel ears I 34," said ear being positioned "on each end-er "the semi- 1e1reu1'arfpertieris'er the'iing I30. H I V ,A length of pipe l36of 'a diameter for being slidably 's'nug1 received i'nithe ring fan is disfi 'dsed in a vertical position between the bars I23. to of the pipe I36 is provided With and attached to' an annuiar member I38, having "a circular center 14!] and oppositely disposedarms l 42 exte nding therefrom of a'len gth'for being slidably received in and guided by the channel bars I28. A compression springl44 is disposed for bearing againsttheririg l'30 at its lower end and theannularrneniber I38 at its upper end.

T sprmg is "disposed coiled about the pipe I36,

and the latter is disposed surrounding the lower ofthe fiat bars 96. N M The lower end of the pipe I36 isthrea'ded for receiving a pair of large circular n uts l46, the

latter being locked against each o therlin'desired positions. At minimum compression, the-spring I44 is -ofa' length for permitting the nuts I46 to be disposed away from the ring I30 a distance sufiicient for'receiving an end of a horizontally disposed lever I48. I

The lever was is pivoted at its other end to the framework 49 by means of a pivot pin I50. The lever "I48 is actuated by a cam lever I52, the latter having a rounded lower endfor the "sur is o e a iese el er: hcl i' is rotatably secured to the center'of the lever I48 -by a bolt I56.

1 ;The ca'm lever I52 is pivotally mountedby a '-bolt;I 58, below the center of the lever- I52 The "upper end of the pa n lever I52 is p ivotally seeured-by a bolt I60 to one end'of a-reach rod I6 2,tt he other end of thelatter being eccentrically pivotally connected to the small wheel 44.

In operation, the paper cutting machine of this invention functions in the following se- "duence. First, the power-"driving'meansis turned on to actuate the small driving pinion 52 which, in turn, drives the large pinion 50, the shaft 48 and the small wheel 44.

As the large pinion rotates the cam 56 will raise the rock lever 58 and the clamping bar 12. Paper may then be inserted on the table I0 beneath the blade I8, in a desired cutting position.

As the cam 56 passes, the rock lever 58 and the clamping bar 12 will drop, holding the paper to the table I0. Following this, the small wheel 44 will move the reach rod I62 and the cam lever I58 into the dotted line position shown in Figure 1. The lever I48 will then push down: wardly on the nuts I46 causing the pipe I36 and the attached annular member I38 to compress the spring I44 against the ring I30.

The channel bars I28 will then draw down- The yoke "plates I02 and theaters I I0 will tend to slide downwardly of'the -fiat bars 96 and this tendency will bearrested'by the spring I01. The lever arms I I0 will'then' cause the bearing plates I22 to tightly engage'and' graspthe smooth flat bars 96, pushing the latter against the central bearing plate I05. The clutching mechanism will then be in an engaged position. I

Continued pressure of the lever I'48 'will pull downwardly on the second crank arm tie-causing the clamping bar to apply further pressure on the paper. When the lever I48 has reached its lowest position, the wheel 44 will have turned to an extent for starting the slicing motion of the blade I 8 in the direction ofthe arrows '89. After slicing the paper, the continued rota.- tion of the pinion 50 and the wheel will cause the reverse of the above sequence-replacing the parts in their original position for repetition of the above described operation.

If desired, and at times when an extra large stack of paper is to be cut, extra pressure, in addition to that'applied to the paper as described, may be employed through the use of an additional spring mechanism.

Such an additional spring I66 may be employed, coiled about a vertically disposed rod The lower end of the rod I68 is attached to a slide I10 which latter is for the purpose of bearing against and compressing the spring I66.

The upper end of the rod I68 is pivotally secured to the extended inner end of the pin '92.

The rod I68 passes through anaperture, in the central and upper portion of a U-shaped 'member I12, the lower ends of the latter being suitablysecured to the free end of the lever bar I48.

In: operation, at times when the lever I48 is in a downward position, the spring I66 will position when the spring in its compressed state lowers I10 and I68.

From the foregoing description, it is thought to be obvious thata 'paper'cutting machine constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason, I do not wish to be'understo'od aslimiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice, except as claimed.

I claim:

1. A paper cutting machine comprising a framework for supporting paper to be cut; a cutting blade slidably received by said framework; power actuated means attached to said cutting blade for causing. said blade to define cutting movements; a clamping bar slidably received by said framework in a manner permitting the descent of said bar under the influence of gravity; means for alternately upholding and releasing said clamping bar; an elongated member attached to said clamping bar in a manner whereby said elongated member moves upwardly wa d y 0n th ut r nds of t l v r arms H0. and downwardly simultaneously with said bar,

was"? said elongated member having smooth longitudinal surfaces along at least a portion of its length; a clutching mechanism for grasping said smooth surfaces of elongated member at times when said member is in a downward position and releasing said member .at times when said member is moving upwardly; and other power actuated means attached to said clutching mechanism for exerting a downward force on said clutch and said clamping bar in addition to the force of gravity.

2. A paper cutting machine comprising a framework for supporting paper to be cut; a cutting blade slidably received by said framework; power actuated means attached to said cutting blade for causing said blade to define cutting movements; a clamping bar slidably received by said framework in a manner permitting the descent of said bar under the influence of gravity; means for alternately upholding and releasing said clamping bar; an elongated member attached to said clamping bar in a manner whereby said elongated member moves upwardly and downwardly simultaneously with said bar; a clutching mechanism for grasping said elongated rod at times when said rod is in a downward position and releasing said rod at times when said rod is moving upwardly; other power actuated means attached to said clutching mechanism for exerting a downward force on said clutch and said clamping bar in addition to the force of gravity; and a spring in a position for cushioning the force exerted upon said clutch by said other power actuated means.

-3. A paper cutting machine comprising a framework for supporting paper to be cut; a cutting blade slidably received by said framework; power actuated means attached to said cutting blade for causing said blade to define cutting movements; a clamping bar slidably received by said framework in a manner permitting the descent of said bar under the influence of gravity; means for alternately upholding and releasing said clamping bar; an elongated member attached to said clamping bar in a manner whereby said elongated member moves upwardly and downwardly simultaneously with said bar; a yoke adjacent to and overlapping the sides of said elongated member, said yoke being secured to said framework for preventing its excessive downward movement; a pair of lever-arms at opposite sides of said elongated member, said lever-arms being pivotally secured to said yoke at points between the respective ends of said lever-arm; means attached to said lever-arms on the sides of said pivot points respectively and adjacent said elongated member for transferring pressure from said lever-arms to said elongated member; and other power actuated means for exerting pressure on said lever-arms, said other power actuated means being attached to each of said lever-arms on those respective sides of each of said pivot points which are opposite said elongated member.

4. A paper cutting machine comprising a framework for supporting paper to be cut; a cutting blade slidably received by said framework; power actuated means attached to said cutting blade for causing said blade to define cutting movements; a clamping bar slidably received by said framework in a manner permitting thedescent of said bar under the influence of gravity; means for alternately upholding and releasing said clamping bar; an elongated member attached to said clamping bar in a manner whereby said elongated member moves upwardly and downwardly simultaneously with said bar; a yoke adjacent to and overlapping the sides of said elongated member, said yoke being secured to said framework for preventingits excessive downward movement; a pair of lever-arms at opposite sides of said elongated member, said lever-arms being pivotally secured to said yoke at points between the respective ends of said lever-arms; means attached to said lever-arms on the sides of said pivot points respectively and adjacent said elongated member for transferring pressure from said lever-arms to said elongated member; other power actuated means for exerting pressure on said lever-arms, said other power actuated means being attached to each of said lever-arms on those respective sides of each of said pivot points which are opposite said elongated member; and a spring in a position for cushioning the force exerted upon said lever-arms by said other power actuated means.

' VICTOR Z. LYNNEQUEST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 13,501 Riehl Aug. 28, 1855 156,286 Heston Oct. 27, 1874 548,683 Wheless Oct. 29, 1895 662,931 Gilbert Dec. 4, 1900 893,166 Hand July 14, 1908 1,640,965 Schroeter Aug. 30, 1927 2,317,299 Peters Apr. 20, 1943 2,386,706 Moessinger Oct. 9, 1945 FOREIGN PATENTS Number Country Date 204,203 Germany Nov. 12, 1908

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