US1787657A - Cutting machine - Google Patents

Description

Jan. 6,1931; K. H. ANDREN sin. 1,787,657

CUTTING MACHINE Filed June "2'7, 1925 4 Sheets-Shut 2 Jan. 6, 1931. E ETAL 1,787,657

CUTTING MACHINE 4 Sheets-Sheet 3 Filed June 2'7, 1925" Jan. 6, 1931. K. H. ANDREN ETAL CUTTING MACHINE Filed June 27,- 1925 4 ShGQtS-ShGGt 4 ....-m||||||||lll llllnumm...

Patented Jan. 6, 1933 KARL .ANDREN sivnf Emma-01am or mx nwnuxnnwlsconsm, Assienoas TO ARTOS ENGINEERING COMPANY, o -mLwAUxEE, Wiscons n, "A conronn'rion 015' Wisconsin AppIicat'ionnIed June 1W,

IThisginventionjrelates in general to improvements in' the'art' of subdividing mate'- Lrials into pieces of "predetermined size, and arelates morespecifically to lmprovements 1n the construction and Operation of'ma'chines for measuring, marking, scoring or cutting elongated material into. portions of definite, length, and to improved, mechanism for feed-- -ing, conveying (grtransporting such m'atefl or the like, i further general object of the 2o invention is to provide simple and efiicient knife structure for cutting. machines, and improved mechanism foractuating the same. Some, of the more specific objectsyand'advantages of thepresent improvement, are as 25 f0llows: 1 j

To provide improved automatically'opeia' .able cutting mechanism which is a dapted' to accurately cutmaterialfinto pieces 0i pre-.

determined sizeQ I Y To provide a'simple and efiicient machine for.cuttingfl'elongated .o'r ribbon like mate; 3 1

' To provide various other improvements rial into pieces of any desired length.

T0 provide an improved guillotine cutterof maximum capacity and efliciency; c To. provide improved mechanism for con' tinuously deliveringstock to a cutting or similar machine,.a'nd foreither continuously lor intermittently transporting the-material through andfrom' such a machine.

- anism and cooperating'marki'ng'or cutting structure, --wliereby minimum time is lost duringthe markin'g or cutting operation.

Toprovidei-mprove'ments in feed and dis,

. charge mechanismsior cutting machines ,or

.e flective knife action for ting machines,

. angle relativelyto its surfaces.

To provide improved stock feedingmechl cuririiie jMACEmE' 1925-. seriaifiwo. 39,933

the like adapted to operate upon elongated,

material suchas ribbon stock.

anisms ofcutting machines or thelike.

To provide improved driving mechanism for the. cutters and the feed operating mecl To provide simple and efiicient means for j releasing. the'cut stock from; the blades of-f.

cuttingor severing machines;

'To provide impro ved 'aiitomatic' control mechanlsm formachines which are-especially adapted to operate upon ribbon-like stock;

Toprovide an improvedand extremely 1 To provide s mple and efficient. means, for I the blades of cu't-Q maintaining uniform blade pressure between chines.

for severing material atanypredetermined Toprovide cutting mechanism and ily accessible-for inspection, adjustment and scoring or/ cutting machines.

To provide an improved cutting machine.

v stock feeding means, al'llparts of which are read-' To provide-improvements in clutch mech anis'ms especiallyapplicable to automatically functioning machines."

in the construction and operation" of. cutting and feeding mechanisms, wherebythe 50st of construction is reduced t'o a minimumand the e'fficiency is enhanced to a maximum;

These and other objects and'advantages various novel features'of the invention and and forming a part of this specification in of the mode of operation of devices constructed in accordance therewith, may be had: by referring tojthe drawings -accomp anying which like reference characters designate the same or similar parts n the various Views.

Fig.1 is a part sectional side elevation of cutting machine looking toward the 'nives thereof.

Fig. 3 is a full side elevation of the improved cutting machine viewed in a direction opposite to that of Fig. 1'.

Fig. 4 is a part sectional front elevation i of the improved cutting machine.

Fig. 5 is an enlarged fragmentary part sectional top' view of the movable knife and its carrier, of the improved cutting machine.

Fig. 6 is an enlarged front view of the movable knife and its carrier, of the improved guillotine cutter.

Fig. 7 is-an enlarged part sectional end view of the movable knifeand its carrier.

Fig. Sis an enlarged end elevation of the movable knife carrier.

r Fig. 9 is an enlarged part sectional side view of the stationary knife and the improved mechanism for delivering the stock thereto and for releasing the cutvstock therefrom.

Fig. 10 is an enlarged side view of the feed mechanism actuating crank.

Fig. 11' is an enlarged longitudinal section through the feed mechanism actuating ,crank showing the same associated with a fragment of the main gear segment.

Fig. 12 is an enlarged bottom view of the feed actuating crank showing the same associated with'a fragment of the main gear seg-- ment.

Fig. 13 is an enlarged vertical sectional view through the feed belt actuating gearing and clutch.

Fig. 14 is an enlarged part sectional view showing details of the improved feeder actu- :tting clutch.

Fig. 15 is an enlarged end elevation of one elementof the improved knife actuating mechanism.

Fig. 16 is an enlarged top view of a fragnent of the improved knife actuating mechanism.

Fig. 17 is an enlarged central vertical section throughthe improved knife actuating clutch mechanism.

Fig. 18 is an enlarged top view of one ele ment of the improved knife actuating clutch mechanism.

Fig. 19 is an enlargedside elevation of the improved knife actuating mechanism.

While thevarious'improvements are shown and described'herein as having been specifically applied in a guillotine type of cutting machine, it will be apparent that many of the novel features are capable of more general application to other types of measuring,

marking, scoring and'cutting machines. The guillotine cutter specifically illustrated, comprises in general mechanism forcontinuously supplying ribbon like stock 4 at a predetermined rate of .s peed'and for intermittently advancin'g'the stock through and delivering the cutmaterial from the machine; relatively movable knives or blades 2, 3 for severing the stock 4 at an an le to its length into successive pieces of deh nite length; and gearing for operating the feed mechanism and the knives.

The mechanism for continuously supplying the stock 4 to the cutting machine, com

, 'prlses a movable conveyor belt 6 having its delivery end spaced from the rear of the machine proper as shown in Fig. 1,the belt 6 being operable to deliver the ribbon stock 33 into the said space as shown. The mechanism for intermittently feeding or transporting the stock 4 toward and past the blades 2, 3, comprises an endless feed belt 5 coacting with pulleys 26, 27, 28, and a series of parallel feed rollers 30 rotatably supported in side frames 25 which are pivotally suspended from a cross shaft 53. The upper stretch of the feed belt 5 and the horizontal rollers 30 cooperate to provide a downwardly and forwardly inclined runway for the stock 4 which is intermittently withdrawn from the space between the supply belt 6 and the cut-ting machine. The mechanism for either intermittently or continuously de livering the cut stock from the machine, comprises a movable conveyor belt- 7 the receiving end of which is disposed underneath the knife blades 2, 3 as shown in Fig. 1, and which is supported by. a positively rotated actuating roller 24. With the supply and feed belts 6, 5 disposed as shown and described, the uncut continuous ribbon 33 sags during the cutting operation, while the excess material is intermittently removed during the feeding operation to reduce the extent of sagging as indicated by the dot and dash line in Fig. 1. For the purpose of effecting automatic control of the operation of the cutting machine, limit switches 89, 90 may be disposed above and below the sagging ribbon 33, these switches being operable to slow down the actuating motor in case the upper switch 89 is operated by insufficient sagging of the ribbon 33, and to speed up the motor in case'the lower switch 90 is operated by excessive saggin of the stock.

The, main rame of the cutting machine comprisesa pair of side frames 29 supported upon a base. 49 and interconnected at their upper ends by one or more tie rods 47, an auxiliary endframe, and a pair of compression members 100. The main frame besides providing' a support for the stock feeding mechanism, also constitutes a support for the stationary knife carrier 16and provides upright guideways 20 for the movable knife 3. The

mama? movableknife carrier 19 is vertically reciprocable withinthe guidewa sand has a knife support. 21 suspen ed. therein at a slight an 1e relatively to the plane otthe cutting e go ofthestationary blade 2 as shownin Fig. 5, by means of horizontal pivots 37-. The cooperation of the blades 2, 3 is such that the cutting edges have .point contactonly-, the movable knifebeing urged v toward. the stationary blade 2by means of a.

compression spring .34 coacti-ngwith the blade support 21 and .with an adjustable cap. .52. The movable blade 3-.is pro erly positioned relatively to the stationary lade 2 by means of a nut cooperating withthe carrier 19 and with a stud. associated with thecarrier 21. .A roller 22 associated with i theniovableknife carrier 21 coacts with a resiliently retained rail 23 "the upper end. of

whichis .pivot ally'associated with one of the side frames 29, and the lower extremity of which reacts against a" compression" spring 69 associated with a tension rod 68 asshown in Fig.3. The tension ofthe. spring 69 is" adjustable toproduce a desired uniform ressure-upon the movable b1ade 3 throng out the entire "cut. The movable blade carrier 21 is furtherprov'ided with a downwardly projecting knifeg'uide 36 for positively preventing this blade frommoving downwardly along the rear .side of the stationary bladeand for maintaining the movableblade 3 in.

- front of the stationary blade 2 at all times.=

The opposite ends of the knife carrier or support '19rare providedwith outwardlyextending actuating pins 38 which are engaged by the upper extremities. of the adjustable knife actuatingconnections 39 the lower extremities of'which engage the crank pins -51.

The crank pins 51 are'carried-by-cranks .securedto-the opposite ends ofthe knife actuating shaft 9 which'is supported in the side frames 29. The shaft 9. is'intermit-f tently rotatable to verticallyreciprocatethe movable knife 3,.by means of clutch me'ch- .anism shown in Figs. 15 16, 17, "18 and 19.

The knife actuating clutch comprises a memtransversely therethroug ber 40 keyed to the s haft 9 and'having an Tannular groove -41 therein within which a block 42carried' by an end of the lever 43 is. adapted to ride. A latch bar 79 having a wedge surface '82. is carriedin a transverse opening in the member. 40, t-he bar 79 being urged toward the. right as'viewed in'Fig. 17 by means of a spring. 81. The spur gear 54:- "isloosely mounted upon the shaft 9 ahdhas a pair of hardened Wearingpins-8O extending cut away to provide a slot 83 adapted to recei ve the end of the'lat chbar79 The gear 5-1 is continuously rotatable by'means of a gear 85 secured ,to-the". power shaft 8 which also carries a gear. 55 meshing. with a pinion 86 securedto the main driving'shaft .885 the shaft 88 being continuously rotatablev the pins- 80' being The medial portion 0 the clutch actuating lever 43 is'pivotally associated with the shaft 8 whilethe'rearend thereof-carries a roller 44 which is cooperable with a cam 45 secured tofacontinuously rotatable crossshaft 10.

The. lever 43 is movable in a counter-clockwise" direction about the' sha-ft 8 by means of a spring 8 1 the lower end ofWhich is at- "tached to thebase 49, and-is intermittentlyihovable inthe opposite direction by the ro+ The' shaft 10"is supported in hearings in the side frames 29 and is continuously rotatable by means of intermeshingfgears'56,

57, 59, thegear 56 being secured to the power shaft 8, the gear59 being secured tothe shaft 10, and. the. gear 57 being carried by an'intermediate idler shaft The feed belt actuating crank 48 is secured to an end of the shaft ing shaft 53 to which the driving drum 26 is secured. The pinion 62 hasa lateral projec .tion 72 which is drivingly 'connectedto an internal clutch member 73 having a plurality of inclined or wedge surfaces 76 coactingwith lockingrollers 7 4 as. shown in Figs. 13 and 14. The rollers 74also coact with the interior surface of .anbuter clutch member 63,

and are urged along the wedge surfaces 7 6 by'meansof helical compression springs 7 5 which react against projections on the in ternal clutch member 73. The outer clutch member 63 is .keyed to shaft 53 and is positively' prevented from-rotating ina counterby means' of a drivin motor of pulley 46. i

'10 and carries a cross-f'head32 which is adf justable along thecrank48 by means-of a clockwise direction as viewed in "F ig. 1 1, by

means of .,a locking roller 70 coacting with the periphery of the member 63 and'with an inclined stationary abutment 71 formed "integraliwith the adjacent side frame, 29.

The medial portion of theshaft 10 carries a continuously. rotatable cam 12 formed for intermittntcoaction with a-roller 13 carried by the lower end of a feed roller shifting lever-14, see Figs. 4 and 9. The lever 14 is clamped to the medial portion of a pivot 31 the ends of which are rigidlyattached to the Ifeedroll supporting frames 25 in which the feed rolls 30 are rotatably supported. I The .rolls 3( frames 25, pivot 31 and lever 14 are simultaneously movable about the crossshaft 53 in a clockwise direction as viewed the conveyor 7 in Fig. 9, by the cam 12 and are automatically returnable to the position indicated in Fig. 9, by gravity, when the cam 12 becomes i11 effective. The counter-clockwise movement of the feed rolls 30 is limited by a stop rod 15 secured tothe stationary knife carrier 16 and loosely penetrating a lug 65 formed integral with the lever 14. The roller supporting frames provide bearings for a cross-shaft 58 to which a gear 66 is secured. The gear 66 meshes with a gear 87 secured to the feed belt driving shaft 53 and also meshes'with pinions secured to the ends of the two upper feed rolls so as to positively rotate the'se rolls. The two'lower feed rolls 30 are positively rotated by means of a chain 91 coacting with sprockets at the corresponding ends of the .three lowest rolls 30. The cross-shaft 53 is connected by means of a chain drive 67, to the discharge conveyor driving drum 24, as shown in Fig. 1 to impart motion to the conveyor 7 simultaneously with the rolls 30, but may obviously be otherwise driven. During normal operation of the improved cutting machine, the various mechanisms are set in motion by means of power applied to the pulley 46 secured to the driving shaft 88. Rotary. motion of the shaft 88 is transmitted through the pinion 86' and the gear 55 to the power shaft 8. and from thence through the pinion 56 and'gear85 to. the shafts 10, 9 respectively, thereby causing the gear 54 and shaft 10 to rotate continuously. The continuously rotating shaft 10 carries with it the cams 12, 45 and the crank 48 which automatically actuate the material releasing roll 30, the movable knife blade 3 and the feed belt 5 at predetermined intervals.

\Vith a ribbon of stock 4 disposed upon the continuous supply and intermittent feed mechanisms as shown in Fig. 1, and-assuming that the movable knife 3 has just completed a cut, the knife actuating cam 45 is in engagement with the roller 44 and holds the block 42 out of the slot 41 ofthe clutch, element 40,"

The locking pin 79 is then free to move and is held within the slot 83 of the continuously rotating gear 54 by virtue of the pressure produced upon the pin by the spring 81. With the elements thus disposed, the shaft 9 is drivingly connected to the gear 54 and remains thus connected until the knife 3 has sition.

stopping the blade 3 in elevated po- After the movable blade 3 has'been sufficiently elevated, the cam 12 on the rotatingshaft 10 engages the roller 13 of the lever 14 and automatically swings the side frames 25 and. the feed rolls 30 associated therewith, about the-shaft 53 as a pivot, in a clockwise direction'as. viewed in Fig. 9. 'The upward "or lateral movement of the feed rolls 30 effectively releases the severed end of the stock 4 from the stationary blade 2 and permits subsequent free delivery of the ribbon of the inner clutch member '7 3 in a similar directionand causing the clutch rollers 74 to ride alongsthe wedge surfaces 76. As the clutch rollers 74 become jammed between the wedge surfaces-7 6 and the inner surface of the outer clut'ch member 63, the outer member is also positively rotated and produces rotation of the shaft 53 and of the feed belt driving drum 26. The rotary motion of the shaft 53 istran'smitted to the feed rolls 30 and the rotating drum 26 advances the upper stretch of the feed belt 5, the rolls 3O and the belt 5 cooperating'with each other to quickly advance the stock 4 throughthe gap between the separated knife blades 2, 3 and upon the conveyor 7 which is advancing simultaneously with the movement of the rolls 30 and of the belt 5. The cam 12 on the rotating shaft 10 eventually becomes ineffective and releases'the roller 13, whereupon the feed rolls 30 and the elements associated therewith drop by gravity and bring the advanced stock 4 into substantial engagem ent with the stationary blade 2. The downward movement of the rolls 30 is checked by engagement of the lug 65 with the nut at the end of the .rod 15.

When the segment 17 has been swung for- .Ward to its extreme position as determined by adjustment of the crosshead 32, continued rotation of the shaft 10 and of the" crank 48 roduces reverse oscillation of the segment 17 aboutits pivot 18. Such reversal of the movement of the segment 17 immediately causes automatic release of the driving connection between the outer and inner clutch elements 63, 73, and the locking roller 70 quickly becomes effective to stop and to prevent reverse rotation of the shaft 53 and to lock the feedbelt 5, the rolls 30 and the discharge belt 7 against movement. Simultaneously' with the reversal of movement of the se ment' 17, the knife actuating cam 45 againecomes effective to engage the roller 44 andto swing the lever 43 in a clockwise direction as viewed in Fig. 19, thereby automatically removing the block 42 from the groove 41 and again connecting the shaft 9 with the power. The' blade 3 is thereupon y mo'ved .d ownwardlyand cooperates with the stationary blade 2 to sever the stock 4 at an oblique angle relatively to its length. Upon continued application of the power, the forgoingcycle of operationsfis repeated and successive pieces of materialof definite length are severedfrom the ribbon 45 and are discharged by. the conveyor 7.

While the cutting mach ne is thusjfunctioning to alternately advancethe materialand SQVGldt lIltO successive pieces-of prede-Z termined length,-the supply conveyor 6 is continiiously delivering new stock into the gap 33 thus delivered into thisfsp'ace,sags as shown in Fig. 1 and is intermittently elebetween the delivery end of the conveyor .6 and the cutting machine. The. excess stock vated to the" dot and dash line position dur- 'ing forward feedingby virtue of the relatively high speed operation. of the feed belt 5.' VVhenit is desired to effect automatic control of'the machine, the limit switches 8.9, 90 v cooperating with a suitable driving motor,

' may be employed. Withthefiai'd of these switches, 'it will be apparent that if the stock 4: is delivered from the conveyor 6 into the space at the deliveryend thereof at too rapid a rate, the excess stock will engage and automatically operate the lower switch 90 to speed up the operation of the cutting machine and to thereby eliminate'excess sagging. .If the,

stock tiisdeliveredfrom the supply conveyor 6 too slowly, the ribbon 33 will eventually.

engage and operate the. upper switch 89 to slow down the operation of the cutting machine.

From the foregoing description it will be obvious that the improved machine functions to automatically and efiectively cut the continuous ribbon of stock .4 into successive pieces of equal and predetermined definite length. The relative disposition of the actuating shaft 10 and of the segment 17 is such that the feeding period is considerably longer thanthe cutting period, thereby en abling extremely rapid operation of the machinewith minimum loss of time during cutting. As specifically illustrated, the cutting operation consumes aboutone half of the time utilized during the feeding operation, but this relationship between these periods may obviously be varied. By changing the position of the cross-head 32 relatively to the crank 48, theJength of the successive pieces cut may be readily varied, and all pieces cut with a predetermined setting .of the crosshead32 are exactly. equal in length. The

- various mechanisms function automatically to perform their several duties, and the time of each operation may be readily varied by adjustment I to .produce maximum efficiency of operation. The knife and the feed mechanism actuating clutches are rapid, positive and extremely efficient in operation, the

springs cooperating with the rollers (74 of the latter clutch to insureextremely rapld functioning of this device. The iaterally shiftablefeed rolls 30 automatically remove sticky stock 4' from the stationary blade 2 after cutting, and facilitate subsequent adva'ncement of the stock between the knife blades 2, By locating the receiving end of the discharge conveyor 7 below the sta 'tionary knife support 16, delivery of the stock f 4 to the conveyor 7 is also facilitated, 'espe-.

cially when ,operatin upon gummy stock.

-- The-compressionimem ers absorbthe ene tire cutting pressure and relieve the main side frames from excessive stresses byvirtu'e of themounting of the carrier 16 andof the shaft 9 at oppositegends thereof.

The improved knlfe action embodiedin this machine also; insures clean cutting of an ikind of material,.including relatively so t and sticky tire stock. It should. be. noted 'that'b pivotally suspendingthe vertically movab e knife blade 3, by disposingthisblade at an angle to-the plane of. the cut, and by providing relatively inclined cutting blade with each other andsubstantially constant cutting angle between thecutting edges is maintained throughout the" cut. Thepres-X sure of coaction between the blades 2, 3may be conveniently adjusted 'byadjusting the. spring 69, and this spring automatically.

maintains constant pressure of coaction between the cutting edges. 'The'guiding projection 36 ,elfectively prevents overlapping tion of the cutting edges.

I The entire structure 1s. relatively 'simple,

. e .100 of the blades 2, 3 andinsu'res proper cooperacompact andhighly efiicient considering the work which it performs, and all portions thereof are readily accessiblev for inspection, adjustment andrepairs. While the novel features are shown and described as being specifically applied to a guillotine type of cutting machine, it will be apparent'that at le ast s'omeof these features are capable of advantageous general application to other types of measur-v ing, marking, scoring or cutting machines. r

It should be generally understood that it is not desired to limit the inventionto-the exact details of constructionand operation herein specifically shown and described, for

various modifications within the scope of the.

claims mayoccur to persons skilled in the art.

It is claimed and desired to secure by Letters Patent 1. In combination, 'a knife movable in a plane, a series of rollers formed to. deliver material toward the plane of'movement of 9o edges, the blades 2, 3 have point contactonly cm formed to deliver material toward the plane of movement of said'knife at an oblique angle, and means for periodically simultane- .material toward the plane of movement of livery of the material relative to said plane. 1

said knife at an oblique 'a ngle,.an endless band conveyor formed to deliver material upon said rollers and toward said plane, and means for moving said rollers transversely of their axes to change the direction of de- 5. In combination, means for cut-tin material into predetermined lengths, a p ural- ,ity of rolls for delivering material toward said cutting means, means for rotating said rolls about their own'axes, means for moving said rolls transversely of said axes to change the direction of delivery of the material relative to said cutting means, and means for intermittently delivering uncut material to said rolls.

6. In combination, a knife having acutting edge, a roller located closely adjacent to said edge for feeding material to said knife, means for periodically moving said roller transversely'of its axis torelease material from said edge, and means for positively rotating said roller to project material over said edge.

7. In combination, a fixed blade, a movable blade, said blades having relatively inclined cutting edges and the cutting edge of one of said blades being disposed at an angle relative to the plane of cutting, a support for said movable blade, means for moving said support to cause the edges of said blades to cooperate, and-a spring reacting against said sup 'ort for resiliently urging the edges of sai blades against each other.

8. In combination, a-"fixed blade, a movable blade, said blades having relatively inclined cutting edges and the cutting edge of said movable blade being disposed at an' angle to the plane of cutting, a support movable relatively to said fixed blade, means for pivotally suspending said movable blade from said support, and means reacting against said support for-resiliently urging the edges of said blades against each other.

9. In combination, a knife movable in' avertical plane, means for advancing material downwardly at an oblique angle relatively to said plane, and a discharge conveyor crossin said ,plane and disposed beneath said knlfe and said advancing means. I

10. In combination, a stationary knife, a movable knife cooperable with said stationary knife to cut material, a roller carried by said movable knife, and a resiliently retained rail cooperating with said roller during relative movement of said knives.

11. In combination, a knife movable in plane, rotary means for delivering material toward the plane of movement of said knife at anoblique angle, an endless band conveyor formed to deliver material upon said rotary means and toward said plane, and means for movin said rotary means transversely of the axis of rotation to change the'directi'on of delivery of the material relative to said plane.

12. In combination, a knife, rotary means for delivering material toward. said knife, means for moving said rotary means transversely of the axis of rotation to change the direction of delivery of the material relative to said knife, and means for intermittently delivering uncut material to said rotary means.

13. In combination, a --knife movable in a vertical plane, a series of-rollersfor advancing material downwardly'at an obliqueangle re a tively to said plane, and a dischargeconveyor crossing said a lane and extending beneath said knife and said advancing means.

14. In combination, a knife movable in a vertical plane, means for advancing material downwardly at an acute angle toward said plane adj acent to said knife,'and-a discharge conveyor crossing said plane and extending beneath said knife and said. advancingmeans.

15. In combination, a knife having a cut: ting ed emovable in asubstantially vertical plane w ilej cutting, means foradvancing material downwardly and toward said plane at an acute angle, and means for elevating said advancing means to project material across said plane when said knife is open.

16.. In combination, a knife operable to cut material in a substantially vertical plane, means for holding material at an acute angle relative to said plane during cutting, and means for moving the severed. end of the advancing stock away from a cutting edge of said knife before projecting said material across said plane preparatory to subsequent cutting.

17. In combination, a knife having cut- .tin edges relatively movable in a substantial y vertical plane to cut .material, means for feeding'material' downwardly and toward said plane at an acute an 1e, and means for moving the severed end 0 said material away from a cutting edge of said knife before projecting said end across said plane between said eclges preparatory to subsequent cutting.

1 subsequently feeding the severed end of said material across said plane.

r In testimony whereof, the signatures of the inventors are aflixed hereto.

KARL H. ANDREN. HAAKON T. OLSEN.

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