US2418066A - Paperboard slitting and scoring mechanism - Google Patents

Description

March 25,1947. B Kg 2,418,066.

PAPERBOARD SLITTING AND SCORING MECHANISK Filed Aug. 12, 1944 4 Sheets-Sheet 1 INVENTOR ATTORNEYS i v/MTM March 25 1947. H. w. BRUKER ransom gramme AND sconme uacmmrsu Filed Aug. 12, 1944 4 Shelets-Sheet 2 SN J L5 5 Q N INVENTOR H w A4 ATTORNEY M 25, 1947. H. w. BRUKER 2,

I PAPERHOARD SLITTING AND SCORING MECHANISM Filed Aug. 12, 1944 '4 Sheets-Sheet 3 INVENTOR ZF L. R. n i T wfi |mw H. w. BRUKER 2,418,066 PAPERBOARD SLITTING AND SCORING MECHANISM M ch 25, 1947.

Filed Aug. 12, 1944 4 Sheets-Sheet .4

BY haw! ehxjz ATTOR EYS Patented Mar. 25, 1947 UNITED STATES PATENT orrlcs PAPERBOARD SL ITTING AND SCORING MECHANISM I Hobart W. Bruker, Bordentown, N. J. Application August 12, 1944, Serial No. 549,271

time required to make adjustments of the above character, it also has long been customary to provide two or more scoring and slitting units which .were movableselectively to and from operating position, so that while one unit was in operation during a production run, the operator could be adjusting an idle unit to position its slitters and scorers in the locations desired for the next run, The slitting and scoring opera- .tions have been performed by sets of rotary disks,

9,Claims. (Cl. 164-61) adjustably mounted above and below the path 7 of travel of the paper web and with the latter traveling between them, and the above movements of :the slitting and scoring units to and from operating position have required that one set of disks move through the path of travel of the paperweb. Thus before one slitting and scoring unit could be substituted in operation for another, the paper web had to be severed befor reaching the slitting and'scoring units, and a gap in the paper web created at such units, through which the units could move. To create this gap the feed of the paper web to the slitting and scoring mechanism had to be slowed down or entirely stopped. Also the slitting and scoring units of the prior art which were thus moved to inoperative position for set-up purposes, were left inian awkward and inaccessible position underneath the path of travel of the web, where the operator had to crawl in under the paperboard web and set the slitting and scoring disks for the next succeeding run under conating parts are so arranged that the shift thereor between operating and adjusting positions may be made without slowing down or stopping the feed of the paper web, enabling the machin to run continuously at any speed conformable to othenproduction requirements and dispensing with the need of any extra cutoff operating on v 2 the web before th latter reaches the slitting and scoring units.

The invention also aims tov provide a mechanism wherein the non-operating slitting and scoring disks will be left in a position convenient and accessible to the operator when adjusting them to the locations desired for the next run.

It is also an obje:t of the invention to reduce the waste, off-dimension production incident to the operation of substituting one slitting and scoring unit for another, and to reduce the time required for such operation.

Further. objects and advantages of th invention will bein part obvious and in part specifically referred to in the description hereinafter contained which, taken in conjunction with the accompanying drawings, discloses a preferred formof machine constructed to operate in ace cor-dance with th invention. The disclosure,

however, should be considered merely as illustrative of the principles of the invention in its broader aspects. In the drawings-- Fig. 1 is a schematic side elevation showing the slitting and scoring mechanism in proper relation to the delivery end of the so-called double backing machine which completes and delivers the corrugated paperboard web in the form of a continuously traveling endless sheet.

Fig. 2 is a side elevation of the slitting and scoring mechanism, with certain parts cut away.

Fig. 3 is an end elevation looking from the right of the machine as the latter appears in Fig. 2.

Fig. 4 is a fragmentary plan view, partly in section, showing one of the adjusting devices used in the mechanism of Figs. 1-3.

Fig. 5 is a fragmentary end elevation, also partly in section, looking from the right of Fig. 2, and showing certain driving gearing forming part of the mechanism of Figs. 1-3. x

Fig. 1 shows a sheet I of continuously traveling corrugated paperboard issuing from the delivery end of a double basking machine having the upper and lower drive pulleys 2 and 3, whereupon the sheet travels without the need of any intervening cutoff mechanism to the slitting and scoring mechanism denoted generally at A, which may be driven from a side shaft 4 constituting the main drive shaft for the entir machine.

By the slitting and scoring mechanism A, longitudinal. score lines spaced the desired distances are formed in the web, and the slitting disks operate to trim the side edges of the web to the desired width and may also, if desired, slit the web into parallel strips indicated at la and lb in Fi l.

In accordance with the present invention I provide duplicate slitting and scoring units which are located at successive points along the path of travel of the corrugated web, and each such unit isv so constructed that the sets of slitting and scoring disks which lie respectively above and below the path of travel of the paper web, may be spaced apart vertically to enable the web to travel freely between them, and the upper and lower sets of such disks are so mounted as to afford a gap between their supporting parts in line with at least one side edge of the traveling web, and are further so mounted that the slitting and scoring structureas a whole may be moved transversely of the web to a position at one side of the machine where the slitting and scoring disks are-conveniently accessible for resetting as needed for the subsequent production run. Thus, assuming that one slitting and scoring unit has just been moved into operative posi-= tion to start a production run, the sets of slitting and scoring disks of the unit which has just completed a run, will be spaced apart as above described, the unit will be moved transversely of the machine to disk adjusting or resetting position, the slitting disks will then be moved back into overlapping position to facilitate their co-= ordinate adjustment to the new settings desired, the slitting disks will then be again spaced apart as above described, after which the unit is moved back into operative position with the upper and lower sets of disks spaced apart to enable the paperweb to travel freely therebetween. At the end of the current production run, the slitting and scoring unit which has been in operation is adjusted to space its upper and lower disks apart to clear the traveling web, and the slitting and scoring unit which has previously been adjusted as above described, is then adjusted to move its upper and lower sets of disks toward each other into web-engaging position. The machine thus requires for shifting from one run to another, only the time required to spread apart the upper and lower sets of one unit, and to move together the upper and lower sets of disks' of the second'unit. During the production run, the slitting and scoring unit which has just gone out of service may then be moved transversely of the machine to a position at one side of the traveling web as,

above described, whereupon the settings of its disks will be adjusted as needed for the production run next to be made.

' Preferably a supplementary small lateral adjustment of the slitting disks is also provided as hereinafter described in greater detail. so that during the resetting period and after the slitting disks have been overlapped to facilitate their coordinate adjustment to their new desired positions, the upper and lower slitting disks may be spaced transversely a slight amount from each other, the slitting disks being left in this slightly spaced condition until after the unit has been Referring now more particularly to Fig. 2, I have there illustrated a slitting and scoring mechanism having two units of the character above described and which are duplicates of each other, so a description of one unit will suffice for both. The left hand unit as the machine appears in Fig. 2, has sets of upper and lower slitting disks 5 and 6 (see Fig. 3)- carried respech tively by the upper and lower shafts I and 8.

Likewise the illustrated machine has upper and lower sets of scoring disks 9 and I0 (see Fig. 3)

,carried respectively by upper and lower shafts II and I2, The above disks may be assumed-to be of previously known or any appropriate construction.

In order to afford the above described trans verse movements of the unit between operating and disk resetting positions, the" shafts I, 8, II and I2 above described are mounted upon a carriage which is slidable transversely of the machine, and the supporting structure for the. shafts is constructed to leave a gap in line with at least at: ove referred to.

chine which is illustrated the stationary strucsomewhat greater than twice the length of shafts I, 8, H and i2, and upright frames I4 and 15 are provided at opposite ends of the bed-plate l3. An arch-like cross-piece I6 is locatedabove each slitting and scoring structure, and an intermediate cross-piece l1 underlies each slittin and scoring structure, these cross-pieces l6 and I1 acting as guides along which the slitting and scoring structure travels in movingbetween the operating and disk resetting positions.

An appropriate form of carriage for the slitting and scoring structure will now be described. As shown in Fig. 2, this carriage comprises upper and lower slide plates [8 and I9, respectively,

which are held in sliding relation respectively to the cross-pieces I6 and I! by the guide strips 20 at the. top and 2| at the bottom.

In order to provide the above mentioned gap 22 (see left hand side of Fig. 3) line with at least one side edge of the paper web I, as above described, the ends of the shafts "I and H atone side of the machine may be journaled in a bracket 23 extending downwardly from the upperslide plate l8, and terminating above the level of the traveling paper web I, and the corresponding ends of the shafts 8 and I2 may be journaled in a bracket 24' extending upwardly from the lower slide plate l9 and terminating below the level' versely of the paper web from operative position with respect to web 2, as shown in Fig. 3, to a position at the right hand side of web I (as the machine appears in Fig. 3) the operatingv disks being first relatively'spread or spaced apart to clear them from engagement with the paper web as hereinafter described.

An appropriate power drive may be effecting the above described transverse movements. As shown a reversible motor 26 (which may be assumed to be of known type) drives a sprocket 21 (Fig. 2) through appropriate speed reduction gearing, which sprocket in turn is connected to a sprocket 28 on a shaft 29 by a chain used for aeraoec 30. The shaft 29 carries a pinion 3| (Fig. 2) which engages a rack 32 on the underside of the lower slide plate l9. The above adjustment will also take care of the usual minor transverse movements of the slitting and scoring structure as needed to aline the disks properly with respect to the side edges of the traveling paper web l, the motor being supplemented by a hand wheel 33 for this purpose if desired.

As above mentioned, appropriate mechanism is provided whereby the upper and lower sets of slitting and scoring disks may be spaced apart to clear the paper web when needed and subsequently moved back into web-engaging position. Fig. l shows mechanism suitable for this purpose,

such a mechanism being used in the illustrated formwith each of the upper shafts 1 and H, and

including a vertical. stud 34 mounted on a stationary bearing 35 and which may be manually operated by. an appropriate hand crank (not shown) to rotate the Worm 36. The latter in turn rotates a worm gear 31 carried by a shaft 38 which runs across the machine. The shaft 38 carries a pinion 39 which mes-hes with a gear 49 having a collar 4| which surrounds one of the bearings 42 for the shaft I or II as the case may be, and is eccentrically disposed with respect to the latter, whereby rotation of the stud 34 will cause hub 4| to rotate and thereby raise or lower the bearing 42 and the shaft enclosed thereby. It should be understood that parts (not shown) similar to the above described parts 39 to 42 are provided at the opposite side of the machine so as to raise or lower both ends of the shafts I or II (as the case may be) equally.

Thus when the slitting and scoring structure is to be moved from operative to disk-resetting position the studs 34 will first be turned to relatively spread the upper and lower sets of disks 5, 9 and 6, l0 and free them from penetration into the paper web, after which the motor 26 may be energized to move the slitting and scoring structure transversely to disk-resetting position. The usual forms of slitting and scoring disks do not require that both the upper and lower sets of disks be so moved vertically to clear them from theweb, .preliminary to transverse movement. After the slitting and Scoring structure has been moved as above described to the side of the machine, the studs 34 may be again adjusted to move the disks 5 and 9 back to operative relation respectively with the disk 6 and Ill, whereupon the resetting of the disks as required for the next production run may be made in the usual manner. It will be noted that while this resetting operation is being performed, the unit under adjustment is in a convenient and accessible waisthigh position along side of the machine, where the operator can much more readily make accurate resettings than was the case with prior machines where he had to crawl under and squat down under the traveling paper web to shift the disks.

As previously mentioned the mechanism is preferably so constructed that a slight transverse spacing may be effected between the upper and lower sets of slitting knives 5 and 6, before they are reset to the proper positions for the next succeeding run while the unit is in setting posi tion at one side of the machine as above described. and after the reset unit is again placed in operation. In instances where slitters and scorers are carried by separate shafts, as in the described embodiment, the scoring disks need not partake of this supplementary transverse adjustment.

In the illustrated form of the invention, a hand wheel 43 (Fig. 3) is mounted on one end of a threaded spindle 44, which latter is rotatably mounted in the corresponding end of the shaft 8 by means of a suitable thrust bearing 45. -A stationary internally threaded nut it, carried by a housing 4'! which encloses'the end of a shaft 8, receives the threaded spindle M, and thus by rotating the hand wheel 43 the lower set of slitting disk 6 may be moved to the left as the parts appear in Fig. 3., to space them slightly transversely of the machine with respect to their corresponding upper slitting disks 5. Then after theunit is moved back by motor 25 to aline it with the traveling paper web I,'the studs 34 above described are actuated to relatively move the upper sets of slitting and scoring disks downwardly. to engage the traveling web with the disks, the lower set of slitting disks 6 being still slightly spaced transversely of the machine with respect to the corresponding upper slitting disks 5. Then as the slitting disks start to cut, the hand-wheel t3 is actuated by the operator to shiftthe slitting disks 6 to the right as the machine appears in Fig. 3, into laterally contacting relation with the corresponding'upper disks 5. In this way injury is avoided to the cutting edges of the slitting disks, which otherwise might occur when the upper and lower sets of disks are relatively moved toward each other as previously described.

The units are also preferably so constructed that as they are moved transversely into and out of alined position with respect to the traveling paper web, the driving gearing for the disks is automatically connected thereto and disconnected therefrom.

In the illustrated form of the invention driving power from the side drive shaft t is transmitted to an auxiliary shaft t8 j'ournaled in suit able bearings l9 and 59 (see Fig. 2) on the outer side of the end frame it, by means or sprockets 5i and 52 respectively on shafts i and tilt, and chain at, the power being transmitted to shaft it from sprocket 52 through an appropriate friction clutch tit (Fig. 3). A bevel gear 55 on the end of shaft t8 meshes with a bevel gear 56 on the end of a stud shaft M which passes through and is Journaled in the frame it, the inner end of the stud shaft El carrying a crank pin 58 (Fig. 5) which is engageable with a crank arm 59 on the adjacent end of a spindle fill extending across the carriage and journaled in the brackets 24 and The opposite end of the spindle 69 carries a pinion ti (Fig. 5) which meshes with gears 62 and (53 on the corresponding ends (Fig. 2) of the shafts 3 and i2. These gears 62 and 63 :in turn mesh respectively with gears .M and $5 on the upper disk shafts i and Hi. The relative movements of the shaft l and it toward and from each other, as above described, need not be sufiicient to throw the gears 62 and t l out of mesh with each other, and as indicated in Fig. 3-the gear 92 may move transversely parallel to gear lit during transverse adjustments of the shaft 3 by hand wheel Thus whenever the carriagecarrying the slitting and scoring disks is moved transversely from operating to disk resetting position, the crank 59 (Fig. 5) automatically disconnects from crank pintt so as to disconnect the drive to the unit, and the drive is automatically reconnected when the carriage is moved back into alineme-nt with the travelingpaper web. The duplicate slitting and scoring unit shown at the right or Fig. 2 will of the traveling paper web be either slowed down or stopped between runs, nor is any cut-off mechanism required to be used in advance of the slitting and scoring mechanism. The paper web may be run continuously at its normal speed, as

' is highly desirable in actual practice, and the waste production between runs is reduced to a ing frame constructed to afford passage of a continuous paperboard web past said frame, a carriage carrying upper and lower sets of web enminimum since at this stage it is only necessary I for the operator to adjust the studs 34 and the hand wheel 43 of the slitting and scoring units which are respectively to be thrown into and out of operation. Thereafter the operator shifts the idle slitting and scoring unit to a position at one side of the machine as above described, adjusts the hand wheel 43 and studs 34 of such unit to move the upper and lower sets of disks appropriately, then resets the disks to the proper spacings required for the next succeeding production run. The upper and lower sets of disks are then spaced apart by operation of studs 34, and hand wheel 43 is adjusted to space the slitting disks 6 transversely from their respective-cooperating upper slitting disks 5. Then the reset slitting and scoring unit is moved transversely back into alinement with the traveling paper web I, ready to be placed in operation uponthe completion of the run then in progress.

'While the invention has been disclosed as carried out by a mechanism of the above described specific construction, it should be understood that many changes may be made therein without departing from the invention in its broader aspects, within the scope of the appended claims.

I claim:

l. Paperboard slittin and/orscoring mecha nism of the class described, including a supporting frame constructed to afford passage. of a continuous paperboard web past said frame, a carriage carrying ,upper and lower sets of web engaging disks, means mounting said carriage upon saidframe to afford transverse movements of said carriage between positions respectively in alinement with the path of travel of the paper web and at one side of said path, said carriage having supports for the upper and lower disk structures which are vertically spaced at one ide of the path of travel of the paperboard web to afford clearance for the aforesaid transverse movement of said carriage while the web extends through the mechanism.

2. Paperboard slitting and/or scoring mechanism of the class described, including a supporting frame constructed to afford passage of a continuous paperboard web past said frame, a carriage carrying upper and lower sets of web engaging disks, means mounting said carriage upon said frame to afford transverse movements of said carriage between positions respectively in alinement with the path of travel of the paper web and at one side of said path, said carriage having supports for the upper and lower disk structures which are vertically spaced at one side of the path of' travel of the paperboard web to afford clearance for the aforesaid transverse movements of 'said carriage while the web or:- tends through the mechanism, means being provided to afford relative movements between the upper and lower sets of disks between operative and relatively widely spaced positions.

3. Paperboard slitting and/or scoring mechanism of the class described, including a supportgaging disks, means mounting said carriage upon said frame to afford transverse movements of said carriage between positions respectively in alinement with the path of travel of the paper web and at one side of said path, said carriage having supports for the upper and lower disk structures which are vertically spaced at one side of the path of travel of the paperboard web to afford clearance for the aforesaid transverse movements of said'carriage while the web extends throughthe mechanism, means being provided to afford relative movements between the upper and lower sets of disks between operative and relatively widely spaced positions, and furth'er means being provided to afford relative transverse movements between the upper and lower sets of slitting knives toward and from each other.

4. Paperboard slitting and/or scoring mechanism of the class described including a supporting frame constructed to afford passage of a continuous paperboard web past said frame, a plu rality of carriages each carrying upper and lower sets of webengaging disks, means mounting each of said carriages upon said frame to afford transverse movement thereof between positions respectively in alinement with the path of travel of the paper web and at one side of said path, each of said carriages having supports for its corresponding upper and lower disk structures which are vertically spaced at one side of the path of travel of the paperboard web to afford clearance for the aforesaid transverse movements of said carriages while the web extends through the mechanism.

5. Paperboard slitting and/or scoring mechanism of the class described including a supporting frame constructed to afford passage of a continuous paperboard web past said frame, a plurality of carriages each carrying upper and lower sets of web engaging disks, means mounting eachof said carriages upon said frame to affordtransverse movement thereof between positions respectively in alinement with the path of travel of the paper web and at one side of said path, each of said carriages having supports for its corresponding upper and lower disk structures which are vertically'spaced at one side of the path of travel of thepaperboard web to afford clearance for the aforesaid transverse movements of said carriages while the web extends through the mechanism and means being provided in connection with each of said carriages, to afford relative movements between their upper and lower sets of disks between operating and relatively widely spaced positions.

6. Paperboard slitting and/or scoring mechanism of the class described including a supporting frame constructed to afford passage of a continuous paperboard web past said frame, a carriage carrying upper and lower, sets of web engaging disks, means mounting said carriage upon said frame to afford transverse movements of said carriage between positions respectively in alinement with the path of travel of the paper web and at one side ofsaid path, power transmitting gearing for said disks carried by said frame,

' said carriage carrying power transmitting devices for said disks which are automatically engageable with and disengageable from said first men'- tioned power transmitting gearing as said carriage is moved to and from a position in alinement with the path of travel of the paper web, said power transmitting gearing and devices including a crank and crank pin mounted one upon said frame and the other upon said carriage, and

which are positioned to come into, engagement f with each other when said carriage is movedto position in alinement the paper web. V I

7. Paperboard slitting and/or scoring mecha-.

with the: path of travel of nism of the class described including a supporting -frame constructed to enclose a continuous paperboard web when the latter is passing theresets of web engageable disks, said frame having upper and lower transversely extending carriage engaging guide members mounting said carriage upon the frame to afford transverse movements of said carriage between positions respectively in alinement with the path of travel of the paper web and at one side of said path, upper and lower bearing members adjacent one 'end of said carriage respectively for the upper and lower disk through, a carriage carrying upper and lower structures above mentioned, said bearing members being vertically spaced one from the other to afford a gap in alinement with the path of travel of the paper web.

8. Paperboard slitting mechanism of the class described, including 'a supporting frame 'con-' structed to affordpassage of a paperboard web past said frame, means carried by said frame for supporting upper and lower sets of slitting disks respectively above and below the path of travel of said web, means affording relative up' and down movements between the upper and lower sets of 4 disks between operative and relatively widely spaced positions, and, means affording relative transverse movements of said sets of disks one with respect to the other, between contacting an transversely spaced positions.

9. Paperboard slitting mechanism of the class described, including a supporting frame constructed to afford passage of a paperboard web past said frame, means carried by said frame for supporting upper and lower sets of slitting disks ,respectively above and below'the path of travel of said web, means aif'ording relative up and downmovements between the upper and lower sets of disks between operative and relatively widely spaced positions, and means aflording' relatively transverse movements of said sets of disks one with respect to the other, between contacting and transversely spaced positions, said support.- ing means providing a gap therein in alinement HOBART w. Baum REF'EBENCES CITED The following references are of record in-thefile of this patent:

' UNITED STATES PATENTS Number Name Date 1,278,766 Seymour Sept. 10, 1918 1,888,436 Richards Nov. 22, 1932 1,959,424 Hawkins May 22, 1934 1,570,939 vCameron Jan. 28, 1928 2,305,536 Langston Dec. 15, 1942 Stacker Jan. 23, ms

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