US2045046A - Paper cutting machine - Google Patents

Description

June 23, 1936. G. w. MUDD PAPER CUTTING MACHINE Filed May 31, 1934 6 Sheets-Sheet l .June 23, 1936. G. w. MUDD 2,045,046

PAPER CUTTING MACHINE Filed May 31, 1934 6 Sheets-Sheet 2 June 23, 1936. e. w. MUDD PAPER CUTTING MACHINE Filed May 31, 1934 6 Sheets-Sheet 5 June 23, 1936. G. w. MUDD PAPER CUTTING MACHINE Filed May '51, 1934 6 Sheets-Sheet 4 G. W. MUDD PAPER CUTTING MACHINE June 23, 1936.

Filed May 31, 1954 6 Sheets-Sheet 5 June 23, 1936. G. w. MUDD 2,045,046

PAPER CUTTING MACHINE Filed May 31, 1934 6 Sheets-Sheet 6 Patented June 23, 1936 PATENT OFFICE PAPER CUTTING MACHINE Garrett W. Mudd, Chicago, 11]., assignor to Peters Machinery 00., Chicago, 111., a corporation of Illinois Application May 31, 1934, Serial No. 728,369

Claims.

This invention relates to improvements in machines for cutting paper, such as that which is commonly known in the trade as "cellophane, and one of the objects of the invention is to provide an improved machine of this character having means for handling rolls of material of this character and for cutting from the rolls sheets of predetermined sizes and then stacking and piling the same in an expeditious manner.

A further object is to provide an improved machine of this character which will be of a simple, durable and compact construction, and eflective and efiicient in operation.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention and in which Figure 1 is a side view, partly in elevation, partly in section and with parts omitted, of a machine of this character constructed in accordance with the principles of this invention.

Figure 2 is a top plan view of Figure 1.

Figure 3 is a vertical, irregular, sectional view taken on line 3 --3, Figure 2.

Figure 4 is a horizontal, sectional view, on an enlarged scale, as taken on line l-i, Figure 3.

Figure 5 is an enlarged detail view, partly in elevation, partly in section and partly broken away, as taken on line 55, Figure 7.

Figure 6 is an enlarged, detail sectional View taken on line t-t, Figure 1.

Figure 7 is a detail sectional view taken on line 'l-l, Figure l, on an enlarged scale.

Figure 8 is a detail sectional view taken on line t-t, Figure "I.

Figure 9 is a detail sectional View taken on line !it, Figure '5'.

Figure 10 is a detail sectional view taken on line lll-lll, Figure 2.

Figure 11 is a top plan view, partly broken away, with parts omitted and with parts in dotted lines, of the receiving table or platform.

Figure 12 is a view taken on line I'll-Ill, Figure 11.

Figure 13 is a detail sectional view, on an enlarged scale, taken on line l3-I3, Figure 4.

Referring more particularly to the drawings, the numeral l 5 designates generally a supporting structure, and mounted thereupon in any suitable manner is an actuating motor it, which is connected by means of a drive belt I! and intermediate pulleys Ill-l9 with a shaft that extends across the frame and is journaled in suitable bearings. Connected to the shaft 2|] (see Figure 4) is a gear 2|, which in turn meshes with a gear 22 that is secured to a shaft 23. The shaft 23 is journaled in the supporting structure and is arranged parallel to the shaft 20.

To this shaft 23 and on the outside of the supporting framework is secured a crank arm 24 which is provided with a slot 25 therein and in which slot a slide 26 is positioned and is adapted to be moved towards or away from the shaft 23. The slide 25 is held in its adjusted position in any suitable manner, preferably by means of a plate 27 which rests against one face thereof, and a screw or bolt 28 passes through the plate and into the slide 26, so that by adjusting the screw or bolt a friction will be created between the plate 21 and the face of the crank arm 24 to frictionally bind these parts in position.

Secured to the opposite face of the crank arm is a plate 29 having graduations 30 therealong. This plate is provided with slots 3! through which screws 32 may pass into the face of the crank arm 2d. The graduations serve the purpose of indicating the extent of adjustment of the slide 26 and by reason of the slots 3!, the gage plate 29 may be adjusted longitudinally and secured in position so as to vary the adjustment of the slide 26.

Pivotally connected as at 33, to the slide '26 is a link fi l. This link may be of any desired or suitable length and secured to the free end thereof are racks i5it which are arranged in difierent planes and are connected at their free ends by means of a cross bar or member 3i.

The teeth of the racks Iii- 36 are disposed adiacent, but are laterally spaced from each other so that a shaft ll will pass between the racks. Loosely mounted upon the shaft ll (see Figure 7) is a gear it with which the teeth of the rack it engage and having connected with it for rotation therewith a clutch member 39, and this clutch member houses another clutch member Ml, which latter is keyed or otherwise secured to the shaft ill for rotation therewith.

The clutch member Ml is provided with any desired or suitable number of clutch faces El and between the clutch faces U and the inner periphcry of the clutch member 39 are rollers 42 which, when the clutch elements 39 and are rotated in one direction, will be caused to wedge between the clutch faces 4! and the wall of the clutch member 39 to frictionally lock the gear 38 for rotation with the shaft 31, but, when the clutch elements 39-40 are relatively rotated in the opposite direction such wedging action will be overcome and the gear 39 will be permitted to rotate freely with respect to the shaft 31.

A disc or plate 43 may be provided to form a closure for the housing within the clutch element 39 in which the clutch element 40 is located. This plate 43 may be secured in position in any suitable manner, such as by means of a washer 44 resting against the end of the shaft 31 and the plate 43 and through which washer a fastening bolt or screw 45 passes into the end of the shaft.

Loosely mounted upon the shaft 31 and in proximity to the gear 39 is another gear 46, with which the rack 36 engages and on the side of the axis of the shaft 31 opposite to the side the rack 35 engages the gear 39.

Connected with the gear 46 to rotate therewith is a member 41 preferably having a hub portion 46 through which the shaft 31 passes and upon which hub portion (see particularly Figure 7) the gear 46 is mounted so that the gear, member 41 and hub 49 will rotate freely with respect to the shaft.

A clutch member 49, similar to the clutch member 40, is secured to the shaft 31 for rotation therewith in any suitable manner, such as by means of a key 50, and the clutch member 49 is disposed in close proximity to the face of the member 41 and is provided with clutch faces 5|,

, similar to the clutch faces 4| of the element 49.

A clutch member 52 loosely encompasses the shaft 31 and a portion 53 of the clutch member forms a housing for the element 49. Rollers 54 are arranged between the clutch faces 5| and the inner periphery of the wall of the housing 53 and serve, when the clutch elements 49 and 52 are relatively rotated in one direction, to create a friction and thereby lock the two clutch elements so that the gear 46 will be rotated with the shaft 31, and when relatively rotated in the opposite direction, the gear 46 will rotate freely with respect to the shaft 31.

The end of the wall of the housing 53 is provided with cut away portions 55-56 to respectively form spaced shoulders 51-59, and the ends of the member 41 (see particularly Figure 9) project into the respective cut away portions 55-56 between the respective shoulders 5156. The respective shoulders 51'-59 are spaced from each other for a distance considerably greater than the width of the portion of the member 41 which projects into the space between the respective shoulders so that there will be a "lost motion" between the gear 46 and the clutch members 49-52, for the purpose of interrupting the feeding movement of the material being operated upon, while the material is being severed or cut, in a manner to be later described.

with the mechanism thus far described, it will be manifest that when the rack members 3539 are reciprocated-by the crank arm or-member 24 and as the racks 35-36 engage the teeth of the respective gear wheels 3946 on opposite sides of the center, and as the respective clutch elements are soarranged, upon the upward movement of the racks one of the'gears on the shaft 31 will be locked thereto so as to impart a rotation to the shaft 31, while the clutch member on the other gear will permit the gear and shaft to rotate freely one with respect to the other, but when the racks start to move downwardly or in the opposite direction, the gear which has been locked to the shaft 31 will be unlocked with respect thereto and the gear which was heretofore free from the shaft will be locked to the shaft and the shaft will be rotated in the same direction upon a complete cycle of operation of the crank member 24 and the racks 35-36.

The shaft 31 extends across the supporting 5 structure and is journaled in suitable bearings. Mounted upon the shaft (see particularly Figures 3 and 7) is a feeding roll 59 constructed of any suitable material, such as rubber or the like, and

journaied in swinging bearings 60 is another feed- 10 ing roll 6| which is disposed above and in a position to co-operate with the feeding roll 59, between which rolls the material 62-63 to be cut passes. A spring or any other suitable means 64 may be provided for holding the upper roll 6| in a 00- 15 operative position with respect to the roll 59, and these rolls 696l (see particularly Figures 2 and 3) are connected together at one end by means of gears 64-65 respectively secured to the rollers The material to be cut is in the form of rolls and each of these rollshas a core 66 through which a supporting shaft 61 passes. Adjustably secured upon the shaft 61 and at the ends of the rolls are discs 61' having an inwardly pro- 25 the ends of the core of the roll. 30

A friction washer 61may be provided between the ends of the core of the roll and the disc 61 to prevent overthrow of the rolls while the material is being unwound therefrom.

One end of each of the shafts is bent downward- 35 ly as at 69 and is journaled in a suitable bearing 69 connected to a stationary portion of the ma- I chine. The shaft extends across the supporting structure and is adapted to enter a seat 10 in the supporting frame l5 (see particularly Figure 3), a portion of the frame being shaped to form an incline 11 so that when the shaft 61 is swung into operative position, the end of the shaft will ride up the incline 1i and then drop into the seat 19 so that the roll of material and the shaft 61 will be locked against accidentally swinging out of operative position.

A brake member 12 (see particularly Figures 1 and 2) may be provided to hold the feed rolls 59-6l against overthrow, and the brake member may engage the periphery of the portion "of the clutch element 52, being controlled in its operation by a spring 13.

Arranged in advance of the feed rolls 59 is a cutter for severing the stock of material into pre- 55 determined lengths, and this cutter comprises a reciprocable cutter 14 secured to a cross bar or member 15' by means of fastening screws 16, and springs 11 encompass the screws to hold the cutter member 14 in position. 60

The bar 15 to which the cutter is secured, extends across the supporting frame in proximity to and parallel with the feed rollers 59-6I, andthe bar 15 is secured to two vertically reciprocable members 19, one on each side of the machine and 65 spectively against collars 83 adjustably secured 75 to the respective bars or rods I8; and the springs tend normally to move the cutter H in one direction. Secured to the shaft 23 for rotation therewith are cam members 84 which are provided with a projecting or cam portion 85 adapted to engage and cooperate with the roller 86 secured to the ends of the respective bars or rods I8, so that when the shaft 23 is rotated and the cam projections 85 engage the respective rollers 86, the cutter It will be lowered against the stress of the springs 82, but when the projection 85 passes out of contact with the respective rollers 86, the springs 92 will move the rods or members together with the cutter I4 in the opposite direction.

The reciprocating cutter H co-operates with a stationary cutter member 81 which is of a length slightly greater than the feed rolls 59--6I, and at one extremity of the stationary member 81 there is provided an upwardly inclined projecting lip or extension 88 (see particularly Figures 2 and 3) which serves as a means for maintaining the cutter I4 in its proper position and prevents the cutter from passing over and behind the stationary cutter member 81.

The material 62-63 is superposed and passes under a guide roll 89, and from thence between the feed rolls 596I to be presented to the cutter, and as the cutter I4 is reciprocated the material will be severed and the severed portions will then be carried away from the cutter to be eventually delivered to a receiving table or platform 90.

It will be manifest that inasmuch as the feed rolls are rotated in the same direction by the reciprocation of the racks 35 and 36, there will be a continuous feeding movement of the material during the operation of the cutter, which is not desired, but on the contrary it is desirable to arrest temporarily the feeding movement of the material while it is being cut.

It is for this purpose that the lost motion between the shaft 31 and the gear 46, and as shown in Figures 7 and 9, is provided.

During the interval of time that the ends of the member 41 are moving in the spaces 55-56 out of contact with the respective shoulders Any number of pulleys and any number of belts may be provided, and the pulleys 92 are secured to a suitable shaft 94, the pulleys being laterally spaced from each other for any desired distance, and the pulleys 93 are secured to a shaft 95 (see also Figure 10) and are similarly laterally spaced. Motion is imparted to these conveyors in any desired or suitable manner, but preferably by means of an endless belt 96 which passes over a suitable pulley 91 secured at one end of the shaft 93 and also over a pulley 98 which is secured to one end of the shaft 31 and, as the shaft 31 is rotated by the racks 3536 on the co-operating gears, it will be manifest that through the medium of the driving belt 96, the shaft 95 will be rotated and this in turn will rotate the shaft 94 with the pulleys 92 thereon.

It has been found that in handling material such as cellophane or any other very thin material which of itself is not of a sufficient stout body to permit of the projecting of the same edgewise from conveyors on to a receiving table, it cannot be satisfactorily stacked or piled upon the receiving table and therefore in order to facilita'te the handling of the same and to impart sufiicient rigidity to the sheet or material, so as to permit the same to be projected edgewise on to the platform or pile of material, means are provided whereby such rigidity may be temporarily imparted to the material.

This is accomplished by temporarily producing corrugations in the material which extend in directions lengthwise of the feeding direction of the material after it has been severed from the stock.

To that end there may be provided a series of rollers 98 which are spaced laterally from each other and secured to a shaft 99 for rotation therewith. The shaft 99. is disposed in proximity to the shaft 95 and the axes of the shafts are spaced from each other for a sufficient distance so that the peripheries of the rollers 98 will overlap or project below the supporting surface of the upper run of the endless conveyors 9| and the pulleys 93 over which theendless conveyors pass.

The rollers 98' are so arranged that each one will project into the space between adjacent pulleys 99 at the ends of the endless conveyors 9i, as shown more clearly in Figure 10.

With this arrangement it will be manifest that as the material 62 and 63, if two sheets are cut at the same time, will be temporarily corrugated by deflecting or distorting the body portion thereof so that the corrugations will extend in directions lengthwise of the feeding direction of the material. conveyors 9| and out of contact with the rollers 98, it will assume its natural position and the deflected or corrugated portions will automatically straighten themselves out. This will render it possible to discharge the severed sheets from secured to the shaft 99 which meshes with a gear I I 02 secured to the shaft 95.

The platform or support 90 may be of any desired size and construction and is preferably pivotally mounted upon uprights I03 by means of a pivot I04, and a depending portion of the platform is provided with a slot I05 (see particularly Figure 3) through which fastening screws I06 pass into the uprights I03. Thus by loosening the screws I06, the platform or support may be allowed to swing for a desired distance about the pivots I04 and then fastened into such adjusted position by tightening the screws I06.

This is advantageous because it is sometimes found advisable and that by slightly tilting the receiving platform the material will more readily slide into position thereupon until the front edge of the material engages the stop Illl which is adjustably mounted (see also Figure 2) by means of fastening devices I08 to side members IDS-I Ill. The adjusting of the platform or support 99 will also obviate the buckling of the material or sheets as they are received upon the platform.

The side members its-I I0 on the platform or support 99 are adapted to be moved towards and away from each other, and in order that they As soon as the material passes off of the may be maintained parallel at all times during their adjustment, their extremities are secured respectively to endless flexible members. The member I09 is secured to an endless flexible member III as at H2 and the flexible member passes over pulleys I I3 crossing each other intermediate 'the pulleys as at II4, so that the extremities of the member I03 will be secured to the outer runs -of this endless flexible member.

Similarly the ends of the side member IIO are secured to another endless flexible member and these endless flexible members are disposed beneath the platform or support 30 as shown more clearly in Figure 1.

It will therefore be manifest that by adjusting either of the side members I03I I0, the endless flexible members I I I will maintain the side members straight and parallel.

As the sheets are superposed upon the platform 90, the latter is gradually lowered and when it has reached a predetermined point in its lowering movement the lowering mechanism will be stopped, and when the platform is raised the lowering mechanism will be again set into operation.

This is accomplished preferably in the following manner. Secured to the shaft 23 is a worm II! (see particularly Figures 3 and 4) and this worm meshes with a worm gear H3 secured to a shaft II 1 for rotation therewith, the shaft being journaled: in suitable bearings I I3 and being disposed at substantially right angles to the shaft 23.

Secured also to the shaft I I1 for rotation therewith is another worm H9 that meshes with a worm gear I20 secured to a shaft I2I for rotation therewith. This shaft I2I is arranged parallel with the shaft I20 and is iournaled in suitable bearings.

Gears I22 are secured to the shaft I2I for rotation therewith and each of these gears I22 meshes with teeth I23 on one of the uprights I03 so that when the shaft I2I is rotated through the medium of the gear and worm I I3-I20 in one direction, the uprights I03 and consequently the platform 30 will be lowered. when, however, the platform or receiving table 30 is raised, in a manner to be set forth, the gears I22 will freely rotate with respect to the worm H3 and worm gear I20.

This may be accomplished in the following to form the worm, and secured to the shaft -I2I for rotation therewith and located within the worm gear I20, which latter constitutes a clutch element, is another clutch element I24 similar in construction to the clutch elements 40 and 49. This element I24 is provided with clutch faces I25 to form spaces I26 between such faces and the inner periphery of the wall of the worm gear housing I20. Arranged within these spaces are rollers I21 which co-operate respectively with the faces I25 and the wall of the housing of the worm gear I20 to wedge or form a frictional locking action between the elements I24 and I20, so that when the worm H9 and gear I20 are rotated in one direction, the rollers I2'I will serve to frictionally lock the two elements I24 and I20 together for rotation with the shaft I2I but, when the worm gear I 20 is rotated in the opposite direction, the rollers I21 will be rendered inactive as a locking medium and this will permit the shaft I2I to rotate independently with respect to the element I 20. J

The uprights I03 are connected by a cross bar or member I20, extending across the supporting framework and secured by one end to the cross bar as at I29, is a flexible cable I30. This cable passes over a pulley I3I journaled in a bracket I32 secured to a stationary portion of the framework. The other end of the cable I3I is connected to a member I33, which in turn is connected to a bail or substantially U shaped member I34, the arms I35 of which are pivotally connected by their ends I33 to a stationary portion of the framework and the bail I 34 and member I33 are disposed adjacent the bottom of the supporting structure so as to form a treadle to be engaged by the operator's foot for the purpose of raising the table or platform 90.

As the platform descends, its lowering movement will be controlled by the worm H9 and worm gear I20, and during this lowering movement and by reason of the flexible cable I3I the bail I34 will be raised about its pivoted ends I38 into the upper dotted line position as shown in Figure 1. When the platform or table has reached the limit of its lowering movement with the cut sheets superposed thereon, and after these sheets have been removed, the platform may be raised by the operator by lowering the bail I34. This movement of the bail will, through the medium of the flexible cable I3I, raise the uprights I03 and with it the platform or table 30, as during the lowering of the bail I34, the gears I22 and the shaft I2I'will rotate independently with respect to the worm gear I20 by reason of the disconnection or,the rendering inoperative the clutch connection between the shaft I2I and the worm gear I20 through the medium of the clutch element I24 and rollers I21.

As soon as the bail I34 has been depressed to the lowermost dotted position, shown in Figure 1, the worm gear I 20 will again become looked through the clutch connection with the shaft I2I.

Obviously, in order to permit the bail I34 to be depressed low enough to result in such operation, the entire structure may be mounted upon casters or supports I31, a stop I30 being provided, if "desired or necessary, to limit the downward movement of the bail.

As soon as the platform or support 90 has reached the limit of'its lowering movement, as well as the limit of its raising movement,'or at any desired points in the path of movement of the platform or support, means are provided for automatically stopping and starting the motor I6. This may be accomplished through the medium of a switch I39 (see Figures 3 and 4) from which the feed conductors I40 lead to the motor. An operating arm or member MI is provided for the switch and this arm is provided with an opening I42 through which a rod I43, that is secured as at I44 to the bottom of the platform or support 90, loosely passes.

Adjustably secured to this rod I 43 and on opposite sides of the switch arm I4I are stops I45-I46 which may be positioned at any desired points lengthwise of the rod so that when the platform or support 90 is being lowered, the

. the platform 96 and the latter will be raised by stop or collar I45 will engage the switch arm I and depress the latter to stop the motor.

When, however, the platform 90 is raised the stop or collar I46 will engage the switch arm I to move the latter in the opposite direction and thereby start the motor.

Obviously, the diameter of the opening I42 in the arm MI is of such a size that this operation will not be interfered with.

From the above description it is thought that the operation of the machine will be clearly understood, but briefly stated it is as follows.

The material is supplied from the rolls which are preferably superposed and as shown in the present invention two rolls are employed, but it is manifest that any number may be employed according to the number of sheets that it is desired to sever at the same time, provision of course having been made for the reception of additional rolls.

The material is led from the rolls beneath the pulley 89 and thence between the feed rolls 59-BI, and the motor is then started. Motion being imparted to the lowermost feed roll 59, the material will be fed between the rolls to a position beneath the reciprocating cutter 14, this cutter being reciprocated by means of the cam projection 85 on the shaft 23, and the spring 82 on the bar or rod 18 connected to the cutter. As the material is advanced and as the feed roll 59 is rotated by the reciprocating movement of the racks and 36, the material will be severed by the cutter and delivered to the conveyors 9|. Just at the time that the cutter I4 is operating to sever the material into predetermined lengths, the feeding movement of the rolls 59-6l is interrupted. This is accomplished by reason of the construction of the clutch member as shown in Figure 9, that is just as the racks 35-36 reach the limit of their movement in a downward direction, the cutting is being effected and immediately the racks 35-36 start to ascend. In

order, therefore, to permit the cutter 14 to move out of the way and to prevent the piling up of the material between the feed roll and the cutter, the lost motion is effected by reason of the construction of the clutch elements 52-53-41. As the rack starts to ascend the gear 45 will be rotated, but the rollers 54 will remain inactive as locking elements during the interval of time that the ends of the member 41 move through the spaces 55-56 of the clutch element 52-53, and until the side edges of the member 41 engage the respective walls of the spaces 55-56.

As the material is severed, the sheets are de livered to the endless conveyors 9| and as the sheets pass beneath the rollers 98, they will be temporarily distorted or corrugated, the corrugations extending lengthwise of the sheets in the direction of their travel. This will impart a certain rigidity to the sheets so as to allow them to be readily advanced and discharged on to the receiving platform or support 90 to be piled thereupon.

As the sheets are delivered and as they pass out of contact with the rollers 98, they will automatically assume their normal flat condition.

As the sheets are being delivered on to the platform or support, the latter will be slowly lowered through the medium of the worm I I9 and gear I20, shaft I2i, gears I22 and teeth I23 on the uprights I03 until the stop or collar I45 engages the switch arm I. This will stop the motor.

The superposed sheets are then removed from cutter, and means operating automatically to and unlock said gears to and from said roller depressing the bail I34 to cause the gears I22 and shaft I2I to rotate freely and through the medium of the cable i3I, the platform or support 90 will be raised until the stop or collar I45 again contacts the switch arm I, which will then start the motor, and the same operation may be repeated. J

While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction and in. the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:-

1. In a paper cutting machine, a reciprocating cutter, means embodying feed rolls for feeding the material into a position to be out by the temporarily arrest the movement of the feed rolls while the cutter is severing the material, the last recited means embodying a clutch device comprising two co-operating members, one of said members comprising separate elements connected for movement together and also for movement one with respect to the other for providing a lost motion between the said elements.

2'. In a paper cutting machine a feed roll, cooperating clutch elements for rotating the roll, one of said elements being connected with the roll, the other clutch element comprising two co-operating members, spaced abutments on one of said members, a portion of the other of said members extending into the space between said abutments and of a width considerably less than the width of the space between said abutments, and means for rotating one of the members of the second recited clutch element whereby one of the members will move in advance of the other to produce an interval of rest in the feed roll while the operation of the said rotating means remains constant.

3. In a paper cutting machine a feed roll, cooperating clutch elements for rotating the roll, one of said elements being connected with the roll, the other clutch element comprising two co-operating members, spaced abutments on one of said members, a portion of the other of said members extending into the space between said abutments and of a width considerably less than the width of the space between said abutments, and a gear and reciprocable rack construction for rotating one of the members of the second recited clutch element whereby one of the members will move in advance of the other to produce an interval of rest in the feed roll while the operation of the said rotating means remains constant.

4. In a paper cutting machine, a reciprocable cutter, means embodying a roller for feeding the material to said cutter, means for rotating said roller, the last recited means embodying a plurality of gears, means adapted to alternately lock to impart a constant direction of rotation to said roller, racks individual to and engaging said gears on opposite sides of the axis of said roller for rotating them, and means common to said racks for reciprocating them.

5. In a paper cutting machine, a reciprocable cutter, means embodying a roller for feeding the 1 material to said cutter, means for rotating said roller, the last recited means embodying a plu- 6 mimosa rality oi gears, means adapted to alternately lock and unlock said gears to and from said roller to impart a constant direction oi. rotation to said roller, racks individual to and engaging 5 said gears on opposite sides of the axis of said roller for rotating them, means common to said racks for reciprocating them, and means donstituting a portion of one of said locking means for causing an interruption in the rotation oi! said roll while the reciprocation of the said racks remains continuous.

GARRE'I'I W. MUDD.

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