US1761771A - Paper-feeding and cut-off mechanism - Google Patents

Description

June 3, 1930. c, Q BROVYNELL 1,761,771

PAPER FEEDING AND CUT-OFF MECHANISM Original Filed Feb. 21, 1925 6 Sheets-Sheet 1 affm z,

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June 3, 1930. c. o. BROWNELL PAPER FEEDING AND CUT-OFF MECHANISM Original Filed Feb. 21, 1925 6 SheetsSheet Inu zniov t w w v n M/ 65 Q June 3, 1930.

C. O. BROWNELL PAPER FEEDING AND CUT-OFF MECHANISM 1925 6 Sheets-Sheet 3 Original Filed Feb. 21

- Inuw m Chuvms Oman Browne June 3, c O BRQWNELL PAPER FEEDING AND CUT-OFF MECHANISM Original Filed Feb. 21; 1925 e Sheets-Sheet 4 lhoemor B Swa June 9 c. o BROWNELL. 1,761,771

PAPER FEEDING AND CUT-OFF MECHANISM Qriginal Filed Feb. 21, 1925' 6 Sheets-Sheet 5 June 3, 1930. O BROWNELL 1,761,771

PAPER FEEDING AND CUT-OFF MECHANISM Original Filed Feb. 21, 1925 6 sheetj sheet 6 6 (M06 Om Bvoww are to provide a Patented June 3, 1 930 CHARLES OWEN BROWNELL, OF CHICAGO,

PATENT OFFICE ILLINOIS, ASSIGNOR TO THE WRAP-RITE CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS PAPER-FEEDING AND CUT-OFF MECHANISM Original application filed February 21, 1925, Serial No. 10,826. Divided and this application filed November 8, 1926.

v This invention relates to paper feed and cutoff mechanism particularly adapted for bread wrapping machines and is a division from my copending application filed February 21,1925, Serial Number 10,826.

The particular objects of this invention aper. feed and cutoif mechanism which will positively and'accurately remove. paper from a roll and cut it off to the desired length" and feed it into the machine and properly locate it where it will be operated upon by the machine to be folded about an article such as a loaf of bread, and to provide means for varying the length of piece cut off, and delivered, to

provide means for keepin an even tension taken substantially through the line 66 of Fig.4.;

upon the paper between t e roll and feeding rollers whereby it will be unrolled smoothly without tearing, to provide an improved cutting mechanlsm, to provide an improved starting and stopping clutch thrown intoengagement by the passage of a loaf into the machine and to provide Various other novel features of construction and arrangement, of parts as hereinafter more fully described and particularly pointed out in the claims, reference being which- Fig. 1 1s a side elevation of a part of a bread wrapping machine showing the paper feed and cutoff mechanism embody ing this inventionapplied thereto.

Fig. 2 is a section elevation of the same the longitudinal center of. the machine.

Fig. 3 is a plan view of the same with the parts above I the mainframe of the bread wrapping machine removed.

Fig. 4. is a transverse section with parts broken away taken substantially on the-line 4-4 of Fig. 1.

Fig. 5 is a fragmentary elevation with parts broken away, of the clutch used for driving the paper feed andcutofl macho..- nism.

Fig. '6 is an inverted sectional Fig. '7 is a fragmentary seetion' with plan I on Serial No. 146,958.

parts broken away, of the paper feed drivmg mechanism.

1g. 8' is a sectional elevation on the line 88 of Fig. 7- showing the pa er feed rolls ind a part of the driving mee anism there- Fig. 9 is a. fragmentary elevation of the opposite side of the device from that shown in Fig. 1.

Fig. 10 is a sectional elevation of the paper cutting knives and part of the actuatin mechanism therefor.

Fig. 11 is a fragmentary sectional elevation showing a part of the pa 'r roll and shaft and the tension device t erefor, and

Fig. 12 is a fragmentar, section on the line 12-12 of Fig. 10 of t e paper cutting knives.

Like reference characters refer to like parts in the different figures of the drawvtion with the bread wrapping machine disclosed in my copending application filed August -9 1926, Serial Number 127,979. The portion of the bread wrappingmachine shown in the drawing corresponds substantially to the construction of either of these machines and includes, a frame 1 above which is mounted a conwyor 2 which has loaf gripping means 3 fixed thereto and movable therewith. An elevator 4 is mounted for vertical reciprocatory movement in the frame 1 of the machine and below the conveyor and gripping means, this elevator receiving a loaf of bread at its lowermost position. from a cross feed conveyor 5 which carries the loaves consecutively into the machine and deposits them on the elevator- The paper used in wrapping the loaves of .bread is preferably a wax or parafiin coated paper supplied in rolls and the object 9 of this invention is to unroll the paper and cut into. uniform lengths of the proper size to wrap a loaf of bread and carry such cut ofl lengths into proper position over the loaf of bread on the elevator so that it will be engaged and folded over the respective sides of the loaf as the loaf is moved upwardly into the gripping means 3. Such unrolling and cutting off of the wrapper and locating it in position over the loaf being carriedoutin synchronism with the operationof the wrapping mechanism and particularly the vertical reciprocations of the elevator.

' supports.

by pressing cones 12 into the respective ends of its central opening. The shaft 11 is 1'0- tatably supported at its respective ends in any suitable manner notched blocks 13 fixed to the bars 9 being shown and retaining blocks 14 are located over the notches in the blocks 13 to prevent inadvertent removal of the shaft. q

A tension device which maintains an even tension on the paper is provided which comprises a flanged pulleyor drum 15 fixed to the shaft 11 near one of its ends and a belt 16 is passed around said pulley, its respective ends being attached to tension springs 17, the opposite ends of. each of-which are hooked to an eye 18 fixed to the frame of the machine. The specific action and advantage of this tension device will be hereafter explained.

The paper which is unrolled from the roll 8 is passed upward and extends between the feed roller 19 and the pressure rollers 20 andthence extends in a horizontal plane over the stationary knife 21 and under the movable knife 22 which is arranged for -.vertical reciprocation to cut the paper into wrapper lengths. After being cut bet een knives the wrapper length which has passed onto the continuously moving conveyor belts 23 is carried therebyinto the wrapping machine and deposited upon; supports 24 lo cated over the elevator 4 and prdv' ed. withadjustable stops 25 which are engaged by the wrapper to properly logate it on the T hepaper feed and cutoff mechanism is preferably actuated by power derived from the mechanism of the wrapping machine, this mechanism including a rotating1 shaft 26. A sprocket 27 is fixed to the s a I and a chain 28 is passed around this sprocket and also around a sprocket 29 mounted on a shaft 30 and the shaft 30 constitutes the main power shaft of the paper feed and out off mechanism.- It is necessary that the paper feedand cutofi mechanism operate in synchronism with the wrappingmechanism and furthermore it is desirable that the p'eriodic feeding'of a wrapper into the wrappingmechanism. occur only whena loaf of bread is fed into'the machine to be wrap ed,-thus eliminating the possibility of fee ing several wrappers, into the. machine during the absence .0 loaves on the conveyor mechanism allof which would be'picked up and wrapped about the first; loaf to enter after the intermission or the carrying of a plurality of wrappers onto the supports 24.

might result intheir wrinkling or clogging .inthe machine or in some other unnormal I the shaft 30 and designed to automaticallyrelease at the completion of a single rotation .of said shaft, this single rotation operations. The clutch is tripped into engagement upon entry ofa loaf of bread 31- into the machine on the cross feed conveyor 5, a shaft 32 being mounted for oscillation uponthe frame 1 of the wrapping machine erforming a, complete cycle of feeding an cutting vof the loaves as they enter the machine.

The shaft 32' is. provided with an arm .34 which is connected by a link 35 to a lever 36 fixed to a rock shaft 37 which extends-into e the machine belowthe shaft"30, its inner end being provided with a lever 38' which is connected by a spring 39 to the mechanism which trips the clutch into engagement.

" The clutch mounted on the shaft 30 in- I cludes the sprocket29 driven by; the chain 28 and also the sprocket 40 which is fixed- .44 toward theqprocket and into a recess provided in the face thereof. A lug 46 on the clutch dog 42 provides a means engaged bythe cam 4. for retracting the clutch dog 42 and disengaging it from the sprocket 40.

-The cam'47 is'mounted in a guide 48 for vertical sli ing movement, the spring '49 normally raising it and moving its upper end into the annular groove'50 iii-the clutch member 41 where it will engage the lug 46 to retract. the dog 42 as the clutch rotates. The spring 39 is connected to the lower end of the cam '47 and, being stiffer than the spring 49, will move the cam 47 downward when the lever 38 on the shaft 37 is moved through the various connecting members heretofore described upon entrance of a loaf of bread into the machine on the cross feed conveyor 5. a

To review this part of the operation it 4 6 and 7 and the pressure rollers: are 10- will be seen that the normal position of the parts is that in which the cam 47 is elevated so that its upper end engages the lug 46 on the dog 42 holding the dog in retracted position and out of engagement with the sprocket 40. In this position. the sprocket 40 and the sprocket .29 connected therewith continuously rotate on the shaft being driven by the chain 28 but the shaft 30 is stationary. As a loaf of bread enters the machine it engages and moves the arm 33 on the shaft 32 rocking the. shaft and cans ing, by the intermediate connecting members 34, 35 and 36, the shaft 37 to rock, this motion lowering the cam 47 by means of the spring 39 connected to the lever 38 and when the cam 47 is thus lowered the dog 42 is released and thrust forward by the spring -14 to enter the recess 45 in the sprocket 40 as it rotates-and thus cause the shaft 30 torotate. Before the shaft 30 has completed a single rotation the loaf has passedunder and beyond the arm 33 which is releasedand the parts including the cam 47 return to normal position in which the upper end ofthe cam 47 enters the annular groove 50 in the clutch member 41 and as the clutch continues to rotate and completes a single rotation the lug 46 rides upon the inclined surface of the cam 47 and disengages the dog 42 from the sprocket 40whereupon the shaft ceases to rotate. As before stated a single rotation of the shaft 30 causes the feed and pressure rollers and knife 22 to perform a complete cycle of operations.

The paper feed roller 19 is mounted on the shaft 51 which is' journaled in the side'plates catcd above the feed roller 19 and mounted on the shaft 52.v The shaft 52 is journaled at its respective ends in bearing blocks 53 which are mountedfor vertical movement in the guides 54 on the side plates 6 and 7 and springs exert a downward pressure upon the bearing blocks causing the pressure rollers 20 to bear against the feed rollers 19 or upon the paper which is interposed between them. The shaft 51 is driven as hereafter described and rotation of this shaftis transmitted to the shaft 52 by the intermeshing gears 56 and 57 which are mounted on and fixed to the shafts 51 and 52, respectively. Inasmuch as the thickness of the paper which is passed between the respective rollzer's is very little and the variation of the thicknesses of different papers is very slight intermeshing of the teeth of the gears 56'and 57 is not materially disturbed or interfered with.

The shaft 51 is caused to rotate periodically 'i'n a direction to feed the paper toward the cutting knives by the followingmech- ,anism. A disc 58 having pawls 591$ keyed to the shaft 51 at the outside of the side. plate 7 and a ratchet 60 is loosely mounted upon the shaft 51 adjacent the disc 58 with its teeth in position to be engaged by the pawls 59. A gear 61 is either formed integrally with or is attached to the ratchet 60. The two'diameter gear comprising the gears 62 and 63 which are either formed integral ly or attached together, is journa'led upon av stud 64 projecting from the side plate 7, the larger gear 62 meshing with the. gear 61 and the smaller gear 63 meshin with a rack 65 located adjacent thereto an mounted to reciprocate in a horizontal plane in a guide-" way 66 on the side plate 7. Reciprocation of the rack 65 is caused by rotation of the shaft 30 which is provided at one of its outer ends with a disc 67 and a connecting rod 68 is connectedgat one end to the rack bar 65 and at its other end is eccentrically connected to the disc 67 The eccentric connectionof the connecting rod 68' with the disc thereof and likewise varies the stroke of the rack 65 resulting in a corresponding variation ofthe rotation of the feed roller 19. By this means the length of paper fed at each period of rotation may be adjusted.

From the fore oing it will be understood that during one shaft 30 the rack bar 65 is moved in one direction and duringthe other half of the rotation the rack bar is moved in the opposite'direction. The various parts are so arranged that the first movement of the rack bar rotates the gears 61,62, and 63 and the ratchet 60 in a direction to en age the pawls 59 with the teeth of the rate et and rotate the feed roller 19 to feed a length of paper between the cutting knives while the final movement of rack bar durin each cycle reverses the rotation of sai gears and ratchet and the pawlsg59 ride freely over the ratchet teeth and permit the feed roller alf of the rotation of the v and paper to remain stationary. It is during the last'movement of the rack bar and gears and ratchet and while the feed roller and paper are stationary that the knife 22 is lowered to cut the paper.

The knife 22 is mounted on the vertical slide 72 which is guided at its respective ends in the guides 73 on the respective side plates 6 and 7. The connection of the knife 22 with the slide 72 is preferably by means of a hinge joint 74 at their respective upper edges and springs 75 are interposed between the slide 72 and the knife 22 to thrust its lower or cutting edge into positive en agement with the stationary horizontal mfe 21. The lower orcutting edge of the knife 22 is preferably incline upward from its respective ends to the center so that in elevatedposition the lower points of the knife are in engagement with the stationary knife 21 thus always maintaining a bearing to retain the knife againstdisplacement by thethrust of the springs 75;

The'respective outer ends of the shde 72 are each provided, outside of the side plates 6. and 7,-with cam rollers 76 which bear against cams 77 mounted on the respective ends of a cam shaft 78which is journaled for rotation in the plates 6 and 7, the end of said shaft on the opposite side of themachine from which the feed roller'actuating mechanism is'located being provided with a sprocket 79. A chain 80 passes over this sprocket and also a sprocket 81 on one end of the shaft 30. The sprockets 79 and 81 are of the same diameter and by this driving connection the shaft 78 is rotated simultaneously with the shaft-3O and turns one complete rotation during each cycle of operations. The slide 72 is thrust downwardly by means of springs 82 located at its respec tive ends andthe slide is supported by the cam rollers 76 bearingagainst the cam 77. The greater portion. of the periphery of each cam7 7 is concentric and of av diameter such asto hold'the slide elevated in a position so thatthe paper may be fed under the knife 22. The cams are each'provided with a depression 83 at a proper location to permit the cam rollers together with the slideand knife 22'to be lowered after the paper has been fed forward the proper length and stopped, this lowering of the knife 22 causing it to act as a shear against the knife 21 to cut the paper and the cams are rotated before the completion of the cycle to again elevate the slide. and knife before the mechanism stops.

The wrapper lengthof paper having been fed through the knives andcut off passes upon the conveying belts 23 and under the rollers 84 located above them. The conveying belts 23 are continuously rotated, being driven by a chain 85 which passes aroundthe sprocket 40 and around a sprocket 86 to which is connected a gearr87- meshing with the gear 88 fixed to the shaft 89 on whichthe pulleys 90 are mounted. The belts 23 pass over the pulleys 90 and also over the idler pulleys 91. A shelf or support 92 is arranged in a horizontal plane between the pulleys 90 and 91 to' support the upper stretch of the belts between them and the idler rollers 84 are mounted to bear upon the belts over the shelf 92. I

When the wrapper length of .paper is released by being cut by the knives as before described, it is immediately carried forward by the conveyor belts 23, its frictional contact therewith being increased by pressure end of its movement. The idler rollers 84 N are loosely mounted for rotation upon shafts 93 and 94, the shaft 93 being connected with v the shaft 94 by links 95 and the shaft 94 being retained in position by notched bracket '96 fixed to the frame of the machine, the shaft resting in the right notches to properly locate the rollers 84.

The tensioning device for the purpose of obtaining and maintaining an even tension on the paper between the paper roller and the feed roller comprises, as before stated, the flanged pulley. or drum 15, the belt 16, passed around it and the tension springs 17 connected to the respective ends of the belt and to the eye 18 on the frame of the machine. The function of this device is fundamentally to produce a frictional re sistance to rotationof the feed roller by virtue of thefrictional engagement of the belts 16 with the drum 15. An additional action otherthan mere frictional resistance is obtained by this structure which is as follows: When the paper is started to unroll from the rest position the belt 16 will traverse, the drum stretching the lower spring 17 and allowing the upper spring 17 to contract until-the tension-of the lower spring is increased to. a point where it will overcome the friction of the belt upon the drum after which the drum will slip upon the belt and the friction between them will offer sufficient resistance to rotation of the paper roll to maintain a proper tensionfon the stretch of paper between the roll and the feed roller. When the feed roller stops at the complegon of its operation the paper roll will ha e' attained sufficient momentum to cause it to continue to rotate a short distance before it is stopped by friction of the belt 16 upon the pulley 15 but as soon as this momentum is, overcome the lower spring 17 having been stretched and put under grgater tension than .the upper spring 17 the paper roll will be rotated backward by said roller spring until the slack in the stretch of paper between the paper roll andthe feed roller is taken, up which willstop the backward rotation bf the paper roll and hold the said stretch of paper under a slight tension and without any looseness or slack therein. The result of this is that upon the beginning of the next movement of the feed roller the stretch of paper between it and the paper roll will exert an immediate P1111 pon the paper roll to start its rotation but such rotation is not ma-"f terially impeded at its beginning because stretch of paper between it and the feed roller. 7 v

A resum of the operation of the machine isas follows: Loave's'of bread to be wrapped are fed consecutively into the machine by the-cross feed conveyor 5- onto the periodically reciprocating elevator 4 and as they enter the machine'and pass under the arm 33, said arm is oscillated to rock the shaft 32 which by means of the connecting members 34, 35 and 36, rocks the shaft 37 and the lever 38 thereon lowers the cam 47 by its connection therewith by the spring 39. The sprockets 29 and 40 are continuously rotated by'the chain 28 and when the cam 47 is lowered the lug 46 is released and the dog 42 is thrust forward by the spring 44 into the recess 45 of the sprocket 40.

This causes a'connection between the clutch ratchet and rotate the feeding roller 19 and roll an pressure rollers 20 to move said paper from the paper roll 8 forward between the knives. The stretch of paper between said roller-19 and paper roll'8 has been tensioned so that Durin the paper feeding operation the cam sha 78 has been rotated with the cam rollers 76-riding tions of the peripheries of the cams 77 and holding the slide 7 2' and knife 22 in elevated position. After the cessation of the feeding operation and while the rack bar is traversing its return stroke, the cam rollers 76 are lowered into the depressions 83 in the cams 77 lowering the knife 22 and severing the paper, thecam shaft and cams continuing to rotate thereafter to again raise the cam rollers 7 6'onto the concentric portions of the peripheries of .the cams and hold the knife 22 in elevated position. As soon as the wrapper length of paper has been severed it is carried forward by the conveyor belts 23 and under the idler rollers 84 and deposited upon the supports 24, being stopped in proper position by the stops 25. This feeding, cutting and delivering of the wrapper occurs during the time that the loaf is moving inward on" the cross feed conveyor and belng deposited upon the elevator 4 and before it is elevated by said elevator. Before the shaft 30 has completed a sin le revolution the loaf has passed under t e arm 33 and released it allowin it to return to normal position which likewise permits the shaft 37 to rock back to normal position and thecam 47 to be raised b the spring 49 so that its upper cam en [will enter the annular groove 50 in the clutch member 41 and as the shaft 30 completes its revolution the In 46 will ride uponthe inclined surface 0 the cam-.47 and withdraw the dog 42 from the recess 45 in the sprocket disconnecting the clutch member 41' from the sprocket and permitting the shaft to stop its, rotation and the sprockets 40 and 29 to continue their free rotation. It is necessary that the sprocket 40 which drives the conveyor belts 23, be rotated after the rotathe paper roll immediately rotates upon the fltion of the shaft 30 has stopped because it first movement of the paper and the lower f'is after the feeding and cutting action which tension sprin 17 stretches until the belt} 16 begins to s 'p upon the drum 15, thereby exertln retaining a tension in the stretch of aper between the paper roll and the; fee roller. rotate during half of the rotation of the shaft 30 after which the movement ofthe rackis reversed and the. rotation of the ratchet likewise reversed causing the 'pawls 59 to ride freely 'thereover and the movement of the feed roller and feeding of the paper is stopped. Upon'stopping of the movement of the paper the momentum of the'paper roll -8 causes it to rotate a "slight distance until overcome by friction of the belt 16 upon the drum 15 after which it is returned by tension of the lower spring 17 until stop ed by the stretch of paper between it antfthe feed'roller.

frictional resistance to the paper The feed roller continues to" is actuated by the shaft 30 that the conveyor belts function to deliver the wrapper over the loaf. Y

After the wrapper has been delivered over the loaf the elevator o erates to raise the --lo af into engagement with the" wrapper and and delivered may be varied accordingly.

This is conveniently and quickly done by simply loosenin the stud 69 to release the clam ing mem r 70 and the clamping mem r then moved along the slot 71, to-

upon the concentric porward the axis of the disc 67 to decrease-the I length of the wrapper or away from said axis to increase its length. The proper length of the wrapper may be obtained by Gil ' the proper'setting for different lengths.

The tension device heretofore described is of extreme value although simple in nature.

I ing device.

It has been found that without a proper tensioning device a great deal ofdifficulty is experienced-in unrolling the paper from the roll without its tearing. The paper rolls.

are usually of considerable size and quite heavy. Their resistance to rotation by rea-' 'son of inertia is considerable and their tendency to continue to rotate by momentum is pronounced. Furthermore the waxed paper used has atendency to adhere together especially if the roll as not been kept under the proper climatic conditions. This .adherence of the layers has offereda great deal of annoyance and in fact it has some times been found necessary to throw aside entire rolls of such paper which have an aggravatedtendency to adherence. The jerking of the stretch of paper between thefeed roll and pa er roll whlch had become slack at' the en of a feeding operation would invariably tear the'paper unless its layers separate very freely and unless the paper were of strong and even texture. It has been found that use of the present tensioning device will permit the use of paper'which could not be used without it and that the machine will operate successfully with grades of paper much inferior to that which was necessarily used without such tension-- Although this used in other places and especially in con nection with other wrapping machines, and in fact is adaptable for use wherever it is desired to unroll and cut off uniform lengths of paper.

I claim: 7 1. A paper feed and cutoff device comprising a cutoff mechanism, a feed roller,

a pressure roller, pawl and ratchet driving means mounted on the shaft of the feed roller, a reciprocable' rack bar, a pinion meshing with said rack bar and actuating said pawl and-ratchet means, an intermittently operating clutch-controlled shaft, 9. connecting rod eccentrically connected .at one end to said shaft and connected at its other end to said rack bar to reciprocate the san1e, and means operated by said shaft for actuating said. cutoff mechanism,wh1le the. feed roller is inactive.

2. A paper feed and cutoff device comprising cutoff mechanism, a feed roller, a pressure roller, pawl and ratchet driving paper feed and cutoff mechanism has been described as applied to a breadwrapping machine it may readily be means mounted on the shaft of the feed roller, a reciprocable rack bar, a pinion meshing with said rack bar and actuating said pawl and ratchet means, an intermittently operating clutch-controlled shaft, :1 connecting rod connected at one endto said rack bar and at the other end connected eccel'itrically 'to said shaft, means for varying the degree of such eccentric connection, and. means operated by said shaft for actuatin said cutoff mechanism while thejfeed' roller is inoperative. 7

-3. A paper feed and-cutoff device comprising paper fced rollers, a pawl carrying member fixed to the shaft of one of said rollers, a ratchet rota-tably mounted on said shaft and engaged by said pawl, a pinion fixed to said ratchet, a double pinion journalled adjacent said roller shaft, one inion of which meshes with the pinion attac ed to the ratchet, a reciprocablerack meshing with the other pinion of'the double pinion, an

intermittently operating, clutch-controlled shaft, a connecting rod eccentrically connected to said power shaft and connected to said rack whereby the rack is reciprocated upon rotation of the power shaft, means for varying the degree of eccentricity of.the connection of said connecting rod with said power shaft, cutoff mechanism adjacent said feed rollers, and means driven by said shaft to actuate said cutoff mechanism.

4. A paper feed .and cutoff mechanism comprisingpaper feed rollers, a cutoff mechanism, means for intermittently actuating said feed rollers and cutoff'mechanism, a rotatable support for a roll-of paper, the

paper from which passes between said feed rollers, and means acting to resist the rotation of said paper roll support, such resistance being less at the beginning of rotation thanduring the greater part of such rotation. Y

5. A paper feed and cutoff mechanism comprising paper feed rollers,.a cutoff mechanism, means for, intermittently actuating said feed rollers and cutoff mechanism, a

rotatable support for a roll of' paper, the

I paper from which passes between said feed rollers, means acting mresist rotation of said paper roll support, and means acting to reverse the rotation of the paper roll, support after the stopping of the feed rollers to take up'jthe slack in the paper between the paper roll and the feed rollers caused by rotation of the paper roll due to momentum after the feed rollers have stopped.

6. A paper feed' and cutoff device comprising aper feed rollers, cutoff mechanism, means or intermittentl actuating the'feed rollers and cutoff mec anism, a rotatable support for a paper roll, the paper unrolled from which passes between said feed rollers, means for resisting rotation of said at the beginning of the rotation than during the greater portion thereof, and means to reverse the rotation of the paper roll support after the stopping of the feed rollers to take up the slack in the paper between the paper roll and the feed rollers due to lo tation of the paper roll by momentum after the feed rollers have stopped.

7. In a paperfeeder and cutter, cooperating knives, feed rolls for advancing the paper web to the knives, a clutch-controlled actuating shaft having a radially adjustable crank pin, a rack connected to and reciprocated by said crank pin, pawl and ratchet means actuated by said rack for advancing the feed rolls during the forward movement of the rack, and means actuated by said shaft for operating the cutting knife during the return movement of the rack, substantially as described. I

8. In a paper feeder and cutter, shearing knives, feed rollers for withdrawing a paper web from a roll and advancing it to the knives, an actuating shaft, automatic clutch controlled means for imparting a single revolution to said shaft at each operation, a radially adjustable crank pin on said shaft, a rack connected to and reciprocated by said crank pin, pawl and ratchet means actuated by said rack for advancing the feed rollers during the forward movement of the rack,

and means actuated by said shaft for operat- 7 ing the cutting knife during the return movement of the rack and while the web is gripped and held stationary by the feed rollers, substantially as described.

9. In a paper feeder and cutter for wrapping machines, paper web feed rolls, shearing knives for severing separate Wrappers from the web, a supplemental feeder for delivering the severed wrappers to the wrapping machine comprising an endless conveyor and a superposed feed roll, means for eoi'itinuously operating said supplemental feeding conveyor and means for intermittently and successively operating said main feed rolls and the cutting knife, and including an intermittently operating shaft having a radially adjustable crank pin for varying the movement of the main feed rolls and the length of the severed wrappers, said supplemental feed roll being independently adjustable to and from the wrapping machine to deliver wrappers of different lengths, substantially as described.

10. In a paper feeder and cutter for wrapping machines, intermittently and successively operating main feed rolls and shear ing knives for advancing a web and severing separate wrappers therefrom, a continuously operating supplemental feeding conveyor and a superposed, independently adjustable feed roll for advancing the severed rappers, guides having downwardly inclined forward end portions for receiving CHARLES OWEN BROWNELL.

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