US2593154A

US2593154A - Machine for cutting webs of material into strips

Info

Publication number: US2593154A
Application number: US139163A
Authority: US
Inventors: David N Judelson
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-01-18
Filing date: 1950-01-18
Publication date: 1952-04-15
Anticipated expiration: 1969-04-15

Description

April 15, 1952 D. N. JUDELSON 3,

MACHiNE FOR CUTTING WEBS OF MATERIAL INTO STRIPS Filed Jan. 18, 1950 5 Sheets-Sheet l INVENTOR DAVID N. JUDEL50N ATTORN EYS April 15, 1952 D. N. JUDELSON MACHINE FOR CUTTING WEBS OF MATERIAL INTO STRIPS Fil'ed Jan. 18, 1950 5 Sheets-Sheet 2 INVENTOR DAVID N. JUDELSON svwkdf m ATTORNEYS April 15, 1952 2,593,154

MACHINE FOR CUTTING WEBS OF MATERIAL INTO STRIPS D. N. JUDELSON 5 Sheets-Sheet 3 Filed Jan. 18, 1950 FIG. 3.

INVENTOR DAVID N. JUDELSON ATTORNEYS A ril 15, 1952 D. N. JUDELSON 2,593,154

MACHINE FOR CUTTING WEBS OF MATERIAL INTO STRIPS Filed Jan. 18, 1950 '5 Sheets-Sheet 4 F'IG.8.

mvgmon DAVID N. JUDELSON ATTORNEYS April 15, 1952 D. N. JUDELSON 2,593,154

MACHINE FOR CUTTING WEBS 0F MATERIAL INTO STRIPS Filed Jan. 18, 1950 5 Sheets-Sheet 5 Lynn I manna INTOR DAVID N. .TUDELSON ATTORNEYS Patented Apr. 15, 1952 UNITED STATES PATENT OFFICE MACHINE: FOR- CUTTING WEBS OF MATERIAL INTO STRIPS David N. Judelson, Park Ridge,- N. J. Application January 18, 1950', Serial No. 139.163

This invention relates to a new and improved machine for cutting a web of material" into strips. This material may be of any type, such asplastic, fabric, paper,,etc..

One of the objects of the invention is to provide a strip cutting machine which can: either cut the material into strips and alsopink' the edges of. the strips, or merely cut the" materialinto strips without pinking.

If the machine pin-ks: the cut. edges of the strips, the adjacent out and pinked edges-of adpinked: strips. are fed in different directions to different take-up shafts from the cutting and pinking mechanism, in order to prevent such interleav-ing or interlocking.

When the machine cuts but does not pink the edges of the out strips, they are led inthe same direction from the cuttingmechanism to: a-single take-up shaft.

I provide a main take up shaft on which all the strips are wound when said strips are out without pinking, and an auxiliary take-up shaft which is easily movable into and out of operating position; When the machine cuts and. pinks, the auxiliary take-up shaft is maintained inoperating position. When the machine cuts without pinking, saidauxiliary take-up shaft is moved into non-operating position. When the machine cuts and pinks, alternate cut and pinked strips are respectively wound upon the two take-up shafts. Since adjacent cutandpinked' strips are led indifferent directions to the respective takeup shafts from the mechanism which cuts and pinks the strips, any interleaving or interlocking. of adjacent pinkededges of adjacent strips is: prevented. This is particularly important when. the material is athermoplastic resinor plastic, or when the material is thin-and-irregul'ar.=-

I. thus provide a. maintake-up shaft on which all the strips are wound to provide rewound rolls of material rolls when said strips are. cut without pinking, and an. auxiliary take-up shaft to take up; alternatestrips when the machine'cuts I and pinks. It has been known tov provide a mato irregularities in thickness of. the material and irregularities in tension, it was impossible to form spiral rewound rolls of: material of. the cut strips on the take-up shafts, of even diameter. Therefore, as the operation continued, the rolls of material. were under unequal tension, and the rolls of material-collapsed sideways on occasions. To remedythis, it has been proposed to drive the take-up mandrels of the. respective rolls of material independently by respective. slip-friction drives, in order to allow for rolls of material of different diameters. 'Accordi-ng to my invention, I provide acutting roll or drum at. which the slitting is performed, and which contacts with the spirally wound rolls of strips on both takeup shafts. Each take-up shaft has a positive mechanical. drive, so that both shafts are rotated in unison at. the same angular velocity.

The cutting. drum frictionally contacts with the rolls of material. on both shafts. The angle of contact between said cutting. drum andthe material which passes around said cutting drum and which is fed to one of the take-up shafts, such as the main take-up shaft later described herein, is at least I? and preferably more than so that said cutting drum is rotated with no slip relative to the strips of material which are cut on said drum.

Also, the cutting, drum is forced by gravity against the rewo'und rolls of material on said selected shaft, which. is the main take-up shaft later described herein, to provide a no-slip drive of the cutting drum relative to the material rolls on both shafts. Since the cutting drum is pressed. against the rolls of material on one shaft, the rolls of material on said shaft are formed of. even diameter. The rolls of material on the other take-up shaft, which is hereafter designated as the auxiliarytake-up shaft, are pressed again't' the cutting drum without slipping, so that these rolls of material on the auxiliary take-up shaft are also formed of even diameter and under even tension.

Other objects and advantagesand features of the invention are stated in the annexed descrip tion and" drawings, which illustrate a preferred embodiment thereof.

Fig. l 'is a side elevation of' the improved machine.- In Fig. 1 the non-operating. position of said. auxiliary take-up shaft and certain auxiliary parts is shown in broken. lines. The operating position of said auxiliary take-up shaft and its auxiliary parts is shown in full lines. When the machinecuts without pinking, the auxiliary shaft is. held in non-operating position. When clutch-operating teeth |4.

3 cutting and pinking members are used in the machine, the auxiliary take-up shaft is maintained in its operatin position;

Fig. 2 is a top plan view of Fig. 1;

Fig. 3 is a detail view of a part of Fig. 1, showing the aforesaid auxiliary take-up shaft and its auxiliary parts in a non-operating position which corresponds to the broken-line position of Fig. 1;

Fig. 4 is a section on the line 4-4 of Fig. 2;

Fig. 5 is a section on the line 5-5 of Fi 1;

Fig. 6 is a section on the line 66 of Fig. 5;

Fig. 7 corresponds to Fig. 6. Fig. 1 shows the release position of a control collar, in order to enable the removal of the respective take-up shaft from the machine. Fig. 6 shows the locking position of said control collar in which the respective take-up shaft is releasably held in position in the machine;

Fig. 8 is a section on the line 88 of Fig. 1;

Fig. 9 is a diagrammatic perspective view showing the respective positions of the main take-up shaft and the auxiliary take-up shaft, when the latter is in operating position, and the machine cuts and pinks;

Fig. 10 is similar to Fig. 9, showing the auxiliary take-up shaft in its non-operating position, when the machine cuts without pinking, and all the strips are wound on the main take-up shaft;

Fig. 11 is a top plan view of one of the pinking knives and its holder; and

' Fig. 12 is a top plan view of a cutting or slitting knife and its holder. This knife is used when the machine merely cuts the material into strips,without pinking the strips.

The machine has a frame F, in which a motor is mounted. Said motor drives a pulley 2 which actuates a belt 3 which drives a clutch pulley 4 which is associated with a companion clutch pulley 5. The pulleys 4 and 5 are free to rotate relative to their common stud shaft 6. This shaft 6 is axially shiftable. This shaft 6 may be nonrotatable relative to frame F.

As shown in Fig. 8. the shaft 6 isprovided with a bearing 1 in the frame F. An end thrust washer 8 is provided between the driven pulley 5 and the bearing 1. The adjacent faces of the pulleys 5 and 4 are provided with friction strips 9 and 9a. The hubs of the pulleys 5 and 4 are hollow, and a compression spring I is located in said'hollow hubs in order to normally space the friction strips 9 and 9a so that pulleys 4 and are normally uncoupled.

A collar H is fixed by a pin ||a to the shaft 6 in order to limit the axial movement of the pulley 4 or shaft 6 under the force of the compression spring H]. An end-thrust washer I2 is located between the hollow hub of the driving pulley 4 and the collar The bearing 1 has .an integral extension 1a, whose edge is provided with A control collar I5 is turnable on the shaft 6. Said collar I5 abuts a collar l6 which is fixed to the shaft 6 by means of pin l6a. Said collar I5 is provided with teeth which intermesh with the clutch-operat. .ig teeth M as shown in Fig. 8. When the collar I5 is in the position shown in Fig. 3, the pulleys 4 and 5 are held uncoupled by spring l0 and they rotate freely relative to the shaft 6. When the collar I5 is turned by means of the rod H, which is pivotally connected to an arm l8 of said collar l5, the intermeshing teeth of collar l5 and of extension 1a force the collar l5 axially to the left of its position shown in Fig. 8, thus shifting the shaft 6 axially to the left of its position shownin Fig. 8. This forces the friction strip 9a of driving pulley 4 into operative contact with the friction strip 9 of driven pulley 5, thus coupling and rotating the pulleys 4 and 5 in unison relative to the shaft 6. The rod |1 consists of two sections which are adjustably connected by coupling l1b. Said rod I1 is pivoted to a pedal P.

When pulley 5 is driven. it actuates a belt I!) which rotates a pulley and its shaft 20a. A gear 2| is fixed to shaft 20a of pulley 20. This gear meshes with and rotates a larger gear 22 which is fixed to the shaft 23.

As shown in Fig. 5, a double pulley 24 is fixed to the shaft 23. This double pulley 24 drives

respective belts

25 and 26. The belt 25 actuates the double pulley 21. The double pulley 21 is mounted upon a shaft 21a. This shaft 21a may be a stud shaft which is fixed to frame F, in which case pulley 21 is turnable on shaft 21a. Pulley 21 may be fixed to a turnable shaft 21a.

One section or groove of the double pulley 21 actuates a belt 28, which rotates a pulley 29 which is fixed to a shaft 30.

The machine has two identical angular frames, each of which has rigid legs 3| and 32, which are optionally fixed to each other in perpendicular relation in this embodiment. The shaft 30 is mounted in said frames at the respective angular junctions between the respective pairs of legs 3| and 32. The legs 3| are turnably mounted on shaft 21a of double pulley 21.

Optionally, legs 3| may be fixed to rods 12, and legs 32 may be pivotally connected by intermediateshaft 30 to legs 3|.

If the legs 32 and 3| are fixed to each other to provide angular frames, said angular frames may be turned around the axis of the intermediate shaft 21a, either to the operating fullline or non-operating broken-line positions of Fig. 1.

If legs 32 are pivotally connected to legs 3| and legs 3| are fixed to rods 12, then, as the winding operation proceeds, the legs 32 will diverge from legs 3|, but the auxiliary take-up shaft 31 will always have substantially the position of Fig. 9, relative to the cutting roll or cutting drum 1|.

Each leg 3| is provided with an extension 3|a which is fixed rigidly to the respective leg 3|. When the legs 3| are pivoted on shaft 21a and legs 3| are fixed rigidly to legs 32, and the frames 3| 32 are turned into the position of Fig. 3 and Fig. 4, in which the auxiliary take-up shaft 31 is in the non-operating position, a recessed part of each extension 3|a, which serves as a stop arm, contacts with a respective cross-rod 33 which is fixed to the frame F. A counter-balance weight 34, in the form of a roller, is provided at the ends of the extensions 3|a. The pulley 29 is a double pulley, which drives a belt 35, which drives a pulley 36 which is fixed to a shaft 23a. which is turnably mounted at the ends of legs 32.

This auxiliary take-up shaft 31 is used only when the machine both pinks and cuts. The main take-up shaft 31a is used alone, when the machine cuts without pinking. The main takeup shaft 31a is rotated by the driven shaft 23 and the auxiliary take-up shaft 31a is rotated by shaft 23a.

As shown in Fig. 5, the main take-up shaft 31a is axially alined with its drive shaft 23. Said main take-up shaft 31a is provided with the usual outer cylindrical mandrel or take-up tube 38, which is made of paper or cardboard or the like or other material which can be readily cut. A smiliar take-up tube or mandrel 38 is provided on the auxiliary take-up shaft 31.

. I Fig. 5- shows that'oneend of the. drive shaft 23 ends at-theline 39;

An inner collar 40 is fixed tov the drive. shaft 23. This collar 40. has an enlarged head, as illustrated inbrokenlines in Fig. 5'. This head of collar 40 has a. slot or recess. 42 in which an extension 31!) oflthe. main. take-up shaft 31a can belocated with. a close. fit. When extension 31?) is. thus located, main take-up shaft 31a is rotated in unison with. shaft 23..

An outerncontrol. collar 4| is turnable upon the; inner collar40. The turnable outer control collar 4| has an axial recess or.- slot 42a and a circumferential slot 43. The pin 44 is fixed to the inner collar 40.. When the outer control collar 4|. is turned .to. the. latching position shown in Fig. 6, the pin 44 of the inner collar 40, is located at. one end of the circumferential slot 43 of: the outer control collar 4|.,.' When-the outer control collar 4.1; is in the latching position of Fig. 6,.the shaft. extension 311) cannot be raised from the slot 42 of the inner collar 40. When the; outer control collar 4| is in the release position of Fig. 7,, the extension 311) registers with the. axial recess or slot 42a of the outer control collar tl', sov that the shaft extension 315 can be raised from. the slot 42 of the inner collar 45. As shown. at the left of Fig. 5, areduced end of themain take-up shaft 31a is mounted in an open bearing of frame'F by; means of an antifriction bearing 45,, which can be lifted from said open bearing.

Anend-collar 46 is mounted releasably upon an externally threaded end-extension 31-0 of the 'shaft"3la,;in order to keep the main take-up shaft the frames 3|32, so that no additional disclosure of this feature is required. Each

shaft

31 and 31a .is positively and mechanically driven, without depending on a frictional drive by the web of material.

Referring to Figs. 9 and. 10, the web of material M which; is to be slitted or cut, is taken from a magazine roll, R, whichis wound spirally upon amandrel or tube 48 which is mounted on a magazine shaft 49. This magazine shaft 49' is located inopen bearings of the frame F, suitable anti-friction rolls 50 being provided. The magazine shaft 49 can" thus be raised from its open bearings.

The magazine" shaft 49 is also axially adjustable:--inits open bearings in the frame F. As shown 'in-Fig; 2, magazine shaft 49 is provided intermediate its ends with a groovedl collar 5| which is fixed to said magazine shaft 49. A lever-52- extends through the grooveof said collei-"5|". This lever 52 is pivoted at 53'to the frame Fi After the axial. position of the magazine shaft-49 has been-adjusted by means of lever 52, an extension of said lever 52 is adjustably clamped ina slot 54 of the frameF. The purpose of this axial adjustment. is to properly aline the edges of the material M which is taken off the roll R on; the: magazine shaft 49, relative-to the nonpinkinggcutters'or pinking cutters. It is univer- 6 sal practice to retard the. rotation of shaft 49, in order to maintain theweb or materialM taut. If the machine is used for cutting without pinking, the non-pinking cutting wheels 55' are used. Each cutting wheel 55 is turnably mounted in a respective cutter-holder 56. As shown in Fig. 10, a series of heads 51 are provided. Each head 51 has a slot in which a respective cutterholder 56 is turnably mounted by means of: a pivotpin 58. The heads 51 have rectangular recesses at their bottom ends, whereby said heads 5'! are fitted on a rectangular holding bar 59. Said holding bar 59. is fixed to arms 12, which are later described. The heads 51 are releasably fixed to said holding bar 59 by means of clamping screws 60. A plurality of blade. springs SI of different respective lengths arefixed to the top of each head 51 by means of a respective fastening member 62. The pressure of each set of blade springs 6| is regulated by means ofa respective nut 64 which is vertically movable. on a screw 63 whose lower end is fixed to the respective head 51. The longest blade spring. 6| of each set abuts a respective adjustable screw 65 which extends turnably into a tapped recess of the respective cutter-holder 56. Each adjustment screw 65 may be provided with a respective lock nut for holding the respective screw 65 in adjusted position.

Similar heads and associated parts are used for holding the cutting and pinking wheels;

Fig. 11 shows a cutting and pinking wheel 55a which has a series of zig-zagfcutting' edges,

- so that it cuts the material and also pinks the cut edges of the strips. Each cutting and pinking wheel a is mounted in arespective. holder 56a, which is associated with a respective head 51, exactly as shown in Fig. 10.

When the material M is taken off the magazine roll 48, it is led in the direction of the arrow 67, around a fixed guide 68; which is fixed to frame F, then in the direction of the arrow 69, and then around a fixed guide 33 which is fixed to frame F, then towards and around part of a turnable cutting drum H which has suitable bearings Ha on a cross-bar which is connected to respective arms 72. This drum H is an idler drum which is rotated by the strip material which is moved in contact with said drum and also by the rolls of material on one or both

shafts

21 and 31a. Each arm I2 has a handhold 13 and each arm 12 is pivoted on the shaft 2.1aof pulley 21. The cutting drum H is turned counterclockwise, as viewed in Fig. 9, by the web of material M, and also by the frictional contact. with the rolls of material on

shafts

31 and 31a, while maintaining pressure between the rolls of material and cutting drum 1 Saidweb of material M, after being slitted without pinking by the cutter-knives 55, is then led in the direction of the arrow 14, and the strips are wound in respective spiral rolls of material upon the mandrel or tube 38 of the main take-up shaft 31a, which is driven clockwise as viewed in Fig. 9. When the cutting and pinking wheels 55a. are used, alternate strips are respectively wound in spiral rolls upon the respective take-up

shafts

31a and 31, in order to prevent interleaving or interlocking of their adjacent pinked edges.

Referring to Fig. 9, this shows axially separated strip rolls of cut and pinked strips A, B, C, D, E and F, which have been wound up on the main take-up shaft 31a. These strip rolls are separated axially from each other. The axial distance between adjacent strip rolls is equal to the width of one of these strip rolls. There are five spaces between the six strip rolls A-F on shaft 370., and the five strips illustrated on auxiliary take-up shaft 31 in Fig. 9 correspond to said five spaces.

As shown in Fig. 10, when the non-pinking cutter wheels 55 are used, only the main take-up shaft 31a is used, in which case the auxiliary takeup shaft 31 and its drive shaft 23a are held in the non-operating position shown in Fig. 3.

When it is desired to thread the material M through the machine for starting the machine, or when it is desired to substitute cutting and pinking knives 55a for non-pinking cutting knives 55 or vice-versa, the arms 12 are temporarily turned to the broken-line position illustrated in Fig. 1. In this position, said arms 12 are held by the stop cross-rod 33. The arms 12 are also provided at respective corresponding ends with a counterweight roller 1211, whose shaft is adjustably fixed in the respective longitudinal slots 12b, in order to adjust the counterbalancing force of said roller 1211.

In many cases, it is desirabl to inter-wind the Web material M in the magazine roll R with a spiral web of paper or other separating material 80, so that adjacent windings of roll R are separated by intermediate windings of separating material 80. This separating material 80 is wound upon a hollow take-up mandrel 95. 'The tapered ends of 'heads of respective turnable shafts 81a are located in the end-parts of the hollow take-up mandrel 95. These shafts 8la are alined in respective bearings of frame F. One of these shafts Bla is provided with a driving pulley 8|, which is mounted on a bearing of frame F and which is connected by belt 82 to one groove of a double pulley 83, which is fixed to a shaft 83a which is turnable in abearing of frame F. Said pulley 83 is rotated by belt 26 which is actuated by pulley 24. Said pulley 8! is loose on the respective shaft Bla, and said pulley 8| rotates a disc 84, which is fixed to respective shaft No, by a friction clutch 90. Said disc 84 rotates in unison with its respective shaft 8 la and said disc 84 is axially slidable on its respective shaft 8la. Said respective shaft 8la has a threaded end 81, on which a collar 86 is screwed. A compression spring 85 keeps disc 84 pressed against the corresponding end of friction clutch 96.

I have described a preferred embodiment of my invention, but numerous changes and omissions and additions can be made without departing from its scope. The invention also includes numerous sub-combinations of the machine described herein.

I claim:

1. A machine for slitting a longitudinally moving web of material into longitudinal strips, said machine having a machine frame, said machine comprising a rotatable main take-up shaft which is rotatably mounted in said machine frame to rotate about a fixed axis to wind said strips spirally in respective main strip-rolls, a rotatable idler cutting drum which is located anterior said main take-up shaft, said web being guided to contact with said cutting drum in a slitting zone which is anterior said main takeup shaft, said idler drum being rotatably connected to a drum-mount which is connected movably to said machine frame, said idler drum being biased towards said main take-up shaft to be pressed against said main strip-rolls, slitting devices located in said slitting zone and biased towards said idler cutting drum to slit said fabric in said slitting zone, said strips being guided to contact with said idler cutting drum between said slitting zone and said main strip-rolls, an auxiliary and rotatable take-up shaft which is rotatably connected to a shaft-mount which is connected movably to said machine frame, said auxiliary take-up shaft being operative to wind some of said strips spirally thereon in respective auxiliary strip-rolls, said auxiliary shaft being biased towards said idler drum to contact said idler drum and to press said auxiliary strip-rolls frictionally against said idler drum, and means for rotating said take-up shafts simultaneously. said main and auxiliary strip-rolls being the operating means for rotating said idler drum frictionally.

2. A machine according to claim 1 in which said slitting devices are connected to said drummount, said slitting devices being biased relative to said drum-mount towards said idler cutting drum.

3. A machine according to claim 1 in which said drum-mount is connected by a pivot to said machine frame, said slitting devices are also connected to said drum mount, said slitting devices are biased relative to said drum-mount towards said idler cutting drum, and said idler cutting drum is located above and is biased by gravity towards said main take-up shaft when said idler cutting drum is in operating position to contact with said main strip-rolls.

4. A machine according to claim 1 in which said drum-mount is connected by a pivot to said machine frame, said slitting devices are also connected to said drum mount, said slitting devices are biased relative to said drum-mount towards said idler cutting drum, and said idler cutting drum is located. above and is biased by gravity towards said main take-up shaft when said idler cutting drum is in operating position to contact with said main strip-rolls, said shaft-mount being connected by a pivot to said machine frame, said pivot having a pivot axis, said auxiliary take-up shaft being located above said main takeup shaft and being biased by gravity towards said idler cutting drum when said auxiliary takeup shaft is in operating position with its auxiliary strip-rolls in frictional driving contact with said idler cutting drum.

5. A machine according to claim 1 in which said shaft-mount is an angular frame, one end of said angular frame is connected to said machine frame, said auxiliary take-up shaft is mounted at the other end of said angular frame, said main take-up shaft is connected to drive means which include a main pulley which is rotatably mounted on said machine frame and which is rotatable about a fixed axis, an intermediate pulley which is rotatable about said pivot axis, a belt drive which connects said main pulley to said intermediate pulley, another intermediate pulley which is rotatably connected to said angular frame at the angle thereof, an additional belt drive which connects said first-mentioned intermediate pulley to said second-mentioned other intermediate pulley, said auxiliary take-up shaft having drive means on said shaftmount which include an auxiliary pulley, and an additional belt drive which connects said second mentioned other intermediate pulley to said auxiliary pulley.

6. A machine according to claim 1 in which said drum mount and said shaft-mount are turnrotate about a fixed axis to wind said strips spirally in respective strip rolls, a rotatable cylindrical idler cutting drum which is located anterior and above said take-up shaft, said web being guided to contact with said cylindrical idler cutting drum in a slitting zone which is anterior and above said take-up shaft, said cylindrical idler drum being rotatably connected to a drum-mount which is connected movably to said machine frame, said idler drum being biased towards said take-up shaft to be pressed against strip rolls on said take-up shaft, said cylindrical idler drum being rotated only by the triotion drive of said strip rolls, rotatable slitting discs located in said slitting zone and biased to be pressed against said cylindrical idler cutting drum to slit said fabric in said slitting zone, said strips being guided to contact with said cylingdrical idler cutting drum between said slitting zone and said strip rolls, and means for rotating said take-up shaft.

DAVID N. J UDELSON,

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

UNITED STATES PATENTS Number Name Date 1,047,498 Hellberg Dec. 17, 1912 1,258,185 Cameron et a1 Mar. 5, 1918 0 1,310,153 Cameron et al July 15, 1919