US1509838A - Paper-perforating mechanism - Google Patents

Description

Sept. 30, 3924. 509,838

D. w. HUDSON PAPER FERFORATING MECHAN I SM Filed July 26, 1922 2 Sheets-Sheet 1 (7, V Armmlfw;

D. W. HUDSON PAPER PERFORATING MECHANISM m D W24,

Filed Jul-V 1922 2 Sheets-Sham )QM V m/14m $404M) V V E A/ TOR an M nrramvsrs.

ll atented Sop t. 30, 1924.

If. as

llLhVID H'UJDSQN, 0F GEEEN BAY, 'WIlISCONSIN.

IMECHANESM.

application filed July 26, was. ilerial filo. 57?,512.

To all whom may concern Be it nnown that DAVID WILLIAM lFluosoN, a citizen of the "United States, residing at Green Bay, county of Brown, and State of Wisconsin, has invented new and useful improvements in Paper-Perforating Mechanism, of which the following is a specification.

This invention relates to improvements in paper perforating mechanism of the type adapted to make a series of transverse perforations in a web of paper at regular intervals, whereby certain portions of the web are rendered detachable as separate sheets. The device is particularly adapted for use in connection with the manufacture of toilet paper, paper toweling and the like.

it is the object of this invention to provide novel and improved perforating mechanism capable of acting upon a continuously moving web of paper without tearing or mutilating the web othei wise than to form the desired perforations.

It is a further object of this invention to pi'ovide perforating mechanism adapted to act upon a web of paper to strike up triangular portions thereof in a series disposed transversely to the web, whereby adjacent cutting action, to the end that; the perforatmg lingers need not be sharpened and can be used indefinitely without repair.

In the drawin s:

Figure l is a diagrammatic side elevation of a device embodying. this invention.

Figure 2 is a plan view of the lower portion of the device, the die roll being re moved and the frame being shown in a horizontal section taken upon a plane lying between the die roll and the special roll which supports the perforating fingers.

Figure 3 is a detail view in end elevation of a portion of the die roll and the perforating mechanism.

Figure is a fragmentary side elevation V1011. portions of the machine irarneand actuatmg mechanism broken away to enpose details of a preferred embodiment oi the de-' vice.

ldigureti is a fragmentary end elevation rigportions of the web are more readily sepa- (embodiment.

rable than is ordinarily the case where the usual perforating mechanism is employed.

lt-is a further object to provide, in combination with perforating iechanism adapted to strike up triangular portions of the sheet or web of paper passing therethrough, means for smoothing back and creasing the upwardly struck portions against the webto which they are attached, whereby they are rendered inconspicuous and permit .of the web being wound smoothly into a roll for use. I

Further objects of this invention are to provide a simplified device capable of continuous operation without attention other than such attention as is required to, provide fresh rolls of paper to be acted upon and to remove the rolls of perforated paper; to provide a device which can be cheaply manufactured and readily assembled; and to provide a device acting upon the web of paper with a tearing action instead of a Like parts are identified by the same reference characters throughout the several views.

. In the embodiment illustrated in Figures 1, 2, and 3, l have illustrated only a single set of perforating fingers and have in other particulars rendered the showing diagrammatic in order to make clear in a general way the arrangement of the 'variousparts of the mechanism. A machine frame indicated in its entirety at 10 supports a supply roll 11 rotatably mounted upon shaft 12 from whiclfis led the web 13 to be acted upon by the perforating mechanism. The web passes about rolls 1'5: and 15 onto a die roll 16 and is acted upon by perforating mechanism carried by the roll 17. Thereafter it passes be' neath a brush l8 and between creasing rolls 19 and 20. Thereafter a slitting roll 21, provided with peripheral knives in the usual manner and registering with a second die roll 22, cuts the web longitudinally into substantially constant tension due to the retarding action of rolls 14 and 15. The posi-' tion of these latter rolls is such that the web passes around a large part of the periphery of the die roll 16 to the rolls 19 and 20 which are power driven and are in such juxtaposition as to crease the paper closely and maintain a constant tension upon web 13 and direct it closely about the periphery of die roll 16.

The die roll is preferably construe-ted as shown in Fi re 3, with a series of conveniently space peripheral grooves about' its circumference, the grooves being separated by intervening ungrooved portions 26. The web 13 rests upon the latter with portions of its area disposed unsupported over the rooves 25.

The r01? 17 which carries the perforating mechanism! is mounted upon a shaft 28 which may be journaled in a sleeve 29 arranged to support the fixed disk cam 30 from the frame 10. The sleeve may bexattached to the frame by means of a suitable annular flange 31. It is to be understood that sleeves 29 and cams 30 may be provided at each end of shaft 28. The roll 17 may if desired, be made solid and may be provided with a recess 32 longitudinally of the roll in its extreme surface. A rock shaft 33 is disposed in recess 32 parallel to the main shaft 28 which carries roll 17. Keyed to this shaft are a plurality of spaced fingers 34 adapted to be received, when elevated, into the peripheral ooves 25 of die roll 16. In their norma or concealed position the finers 34 are received in the short grooves 35 disposed peripherally of roll 17 and communicating with the recess 32 therein. The ungrooved portions 36 of roll 17 which separate short grooves 35 are adapted to register'with the un ooved portions 26 of the die roll, whereby t e web passing between rolls 16 and 17 may be an aged positively between the rtions 26 0% roll 16 and the portions 36 0 roll 17 at the moment of perfora- 'tion. It is not absolutely necessary to provide the ungrooved portions 36 in roll 17, and the recess 32 in said roll may be ex- 1 tended peripherally 'to receive entirely the fingers 34 and do away with grooves 35 and portions 36, if desired.

The rock shaft 33 is extended at either end of roll 17 and is. provided at its ends with levers. 38 rigidl connected to it and car ing rollers 39 isposed for travel upon 3e face of the disk cam 30. If desired, means such as a tension spring 40 connected with the roll and with lever 38 may be utilized to hold said leverand the fingers 34 in a normally retracted position. -VVhen, however, the roller 39 reaches the nose 41 of cam 30 the lever 38 moves against the tension of spring 40 and rocks'shaft 32 upon its axis, thereby elevating the perforating fingers 34 into the grooves 25 of die roll 16.

It will be understood from the foregoing that the cam 30 is-fixed and that the actuation of lever 38 is accomplished during the bodily 'rotation of said lever about the axis of shaft 28. As viewed in Figure 1, the web of material to be acted upon by the perforating mechanism is traveling from left to right between rolls l6 and 17, and it will be obvious that the movement of the ends of fingers 34 induced by the roller 39 in the course of its travel about cam 30 will be such as to cause the tips of said fingers to enter the paper while moving in a direction reverse to the direction of paper travel.

As shown in Figures 2 and 3, each of the fingers 34is provided with a taperin point 44 which may, if desired, be upward y bent as shown in Figure 1. The point is prevented by spring 4O from entering the paper to any degree greater than that caused by the action of cam nose 41 upon cam roll 39. The effect of the entry of the several points into the web of paper in this manner will be to tear small triangular portions of the web away from the remainder thereof upon two sides, The portions so torn from the web are, of course, attached to the web at theirbases. They will conform in size and shapd to that portion of the perforating point which enters the web. The tendency of the web to become further torn will be limited,

due to the support afforded to the web by the ungrooved portions of the die roll. Thus a transverse series of triangular openings are formed in the web simultaneously, and the triangular ton es 45 struckupwardly by the tips 44 of gers 34 remain elevated as shown in Figure 1 until they are acted upon by the brush 18 which is supported by arm 46 in a fixed position closely adjacent to the periphery of pull-roll 19. The fingers 34 have in the meantime been retracted into grooves 35 b spring 40 following the descent of roller 39 rom cam nose 41.

It is immaterial to this invention whether the brush 18 be solid or be provided with bristles. As the web is drawn between pullrolls 19 and 20 the upwardly rojectin ton ue of paper 45-encounters the rush and is olded rearwardly. Immediately afterward the tongue is creased by the action of perforating mechanism in the position in forating mechanism can be mounted upon rolls 16 and 17 of such length as may be desired, and that the web passing over the perforating mechanism can be divided by the well known slitting rolls 21 and 22 into a plurality of narrower. webs, each of which will have beenperforated by thefingers carried by roll 17.

Having disclosed the arrangement and mode of operation of the independent elements of my improved perforating mechanism, I will now describe the embodiment of my invention which is preferredby me.

The principal change occurs in the perforating mechanism itself. Instead of being solid the roll 17 ispreferably made of a series of spaced disks 48 which are ke ed to shaft 28. The disks 48 are arrange to register with the ungrooved portions 26 of roll 16 and are secured in position by countersunk strips 49 disposed parallel to the axis of the roll. Journaled in said disks are the rock shafts 32, a plurality of such shafts being provided although only one was shown .in Figure 1. Arms 50 carried by the rock shafts are provided at their ends with right angle flanges 51 and these flanges are apertured to receive bolts 52 threadedly engaged with bars 53. It will be noted in- Figure 5 that one of the arms 50 is disposed between each pair of disks 48 upon each of the rock sha ts 32, and all of the arms mounted upon a given rock shaft are conuected by a bar 53 which is received in each case into a recess 54 in each of the disks 48. These recesses are best shown in Figure 6.

lgure 1, a saw-toothed blade 55' is used to effect the actual perforation of the web. -The blades 55 are in each case carried by the longitudinally extending bar 53 and are normally concealed in the recess 54 of each of ithe disks 48, through which the bars pass.

At the end of each rock shaft 32 is keyed a lever 38 corresponding in function to the lever 38 iii-Figure 1. The-lever 38, however, is provided with an outwardly project ing pin 58 upon which the cam roller 39 is mounted. In place of the disk cam 30 and spring 40, the preferredembodiment of my invention includes a double cam arrangement including a plate 60 provided with a cam groove 61 having its apex or nose at 41".

50 In place of the separate fingers 34, shown in The arrangement is such that as each roller 39 reaches the eccentric portion'41 of cam groove 60, the 'lever 38 will be moved in a way to actuate its attached rock shaft 32 counter-clockwise-and thereby to elevate the several arms 50 mounted upon that rock shaft and the saw-toothed blade 55 supported therefrom. The construction of rock shafts 32, togetherwith the arms 50 which each rock shaft carries and the manner in which the bars 53 and saw-toothed blades 55 are supported from said arms, is clearly indicated in Figure 7. V A

The remaining portions of the two machines are identical. The chief difference between them lies in the fact that in the preferred embodiment of my invention the roll 17 instead of being solid is a skeleton roll made-up of the disks 48 secured together by bars 49 and by being keyed to a common shaft 28. These disks provide bearings at the several teeth of blade 55 corresponds eX-' actly to the action above described of the fingers 34, disclosed in Figures 1 to3 in elusive. The action of the cam groove 61 upon the several rollers 39, however, in the preferred embodiment is more positive as to the retraction of the perforating teeth than is the action of. the spring 40 shown in Figures 1 and 3.

While the device disclosed in Figures 1 to 3 is an operative structure, it will be understood that only one perforation vwould be made for each rotation of roll 17. In the device shown in Figures 4 to 7 inclusive, six sets of transverse perforations will be made "for eachrotation of roll 17'and the construction of the roll is materially simplified. Such a roll as is disclosed in the preferred embodiment ofmy invention is comparatively easy to construct and is relatively light in weight.

During the operation of either embodiment of my invention, the web of material will be passed between rolls 16 and 17 in the manner above described. Im each case the paper willbe engaged and firmly held between said rolls at the time when roller 39 is actuated by the'cam to lift the perforating fingers 34 or the blade 55' which has released by the retraction of the perforating fingers and are turned back against the face and 20.

j may enter into any suc of the webby the action of brush 1'8 and are creased,m that position by rolls 19 The weblthus having been divided into separable sheets. may be slit longitudinally into a number of strips and is wound upon roll 24. Wherethe web is passed through the device shown in Figure 1 the perforations will be comparatively far apart and the sheets separable from the web will-ac cordingly be comparatively long; Where, however, the web is passed through the .preferred embodiment of 'my invention the compact disposition of the perforating blades about the periphery of roll 17 will result in the formation of a series of sets of erforations which are relativel close toget er, whereby relatively smal ersheets will be separable from the web. Obviously by altering the size of roll 17 or the spae.

ing ofrock shafts 32 about the periphery of said roll, the rize of sheets separable from the web can be entirely controlled, I It is commonly recognized that a web 0 paper must be supported durin a perforating operation, but it has hereto ore been the general practice to provide a transverse groove to receive a transverse series of per-- forating points. This-practice is objectionable, for the reason that the points tend to force the entire web of paper into a transverse groove without perforating it. This will-occur unless the die roll and the roll carrying the perforatin points are exactly synchronized so that t e points may act upon the web with a shearing action across one margin of the transverse groove of the die roll. The web mustalso be kept under proper tension, since any slack will permit the pa or to pass without being perforated.

In t e device herein disclosed no synchronism of the die roll with the roll carrying perforatin points is necessary since each point of t etransverse series registers with an annular groove of the die roll and eripheral portion of groove, It is 1i ewise impossible for the paper to pa$ through this machine without becoming perforated, inasmuch as the ungrooved portions of the die roll support the paper at a plurality of transverse points and therefore do not permit the paper to become folded about the perforating elements in the manner which would be ssible if such: elements co-operated wit a transverse groove in the die roll.

From the foregoing it will be understood that the eo-operation of a transverselyextending series of perforating points with a peripherally or annularly grooved die roll is extremely important to the operation of this machine, not only for the reason that the ungrooved portions of the die roll limit the tearing action of the points on the paper, but for the further and more im ortant reason that the action of the mac ine is entirely positive and requires absolutely no synchronism whatsoever between the die roll and the roll which carries the perforating elements. ,It will be understood that in referring to peripheral grooves herein, I mean grooves which extend annularly about the periphery of the die roll.

I claim:

1. The combination with a grooveddie and means for moving a web past the die said die being grooved in the direction of web travel, 0 a set of perforating' elements registering with the grooves of the die, said elementsextending transversely with reference to the path of web movement and being maintained normally in a retracted position, and means for projecting said elements in the direction of the die and throu h the web with a motion having a longitu inal component with reference to the web,

whereby tongues are struck upwardly from said web ,conformin in shape to the penetrating ends of said perforating elements.

2. The combination with means for advancing a web of paper, of a die for the support of said paper grooved in the direction ofv web advance, a set of perforating elements associated with a series extending transversely with respect to the direction of web advance, means supporting said elements for oscillation into and out of the grooves of said die, said elements being spaced for registry with said grooves and means for actuating said supportin means to control the oscillation thereof an adapted to produce periodical movement of said elements into said grooves, the ungrooved portions of said die being adapted to support a web during the perforation thereof and to limit the action on said web of said perforating elements.

3. In a device of'the character described, the combination with means for continuously advancing a web of paper, of a peripherally grooved rotatable die arranged to co-operate and support said paper, a roll c0- operable with said die, a plurality of transversely extending sets of pointe perforating elements, said elements being arran d for registry with the grooves of said die means for supporting said elements and means forperiodically projecting said elements in the direction of said die whereby 'toperforate a web of material supported from the die, the portion of said die intermediate the grooves thereof bein adapted to limit the tearin of a web ac upon by said! elements wit iout requiring any synchronism of rotation between said die and said roll.

4. The combination with a peripherally grooved die roll and means for passing a 5. The combination with a peripherally I grooved die roll, of a plurality of perforating elements, means for supporting said elements in a normally retracted position and in registry with the grooves of the die roll,

and means for periodically projecting said' elements into said grooves with a movement having a directional component tangential to the die' roll and opposite. to the direction of travel of the web thereon.

6. The combination with a die roll provided with peripheral grooves and cylindri cal surfaces between said grooves, of a rotatable member provided with cylindrical surfaces adapted to register and co-operate with the corresponding surfaces of the'die roll, perforating elements in a transverseseries carried by said member in a normally retracted position, and means for projecting said elements outwardly from said member into the grooves of the die roll.

7. In a device of the character described,

the combination with a rotatable die roll provided with peripheral grooves and supporting surfaces intermediate said grooves, of means for feeding a web of perforable material continuously acrosss'aid roll, a cooperating rotatable member, a set of pointed perforating elements extending in an axial direction with respect to said member, said elements being spaced for registry with the grooves of said die roll, levers normally disposed upon a chord of said rotatable member and adapted normally to support said perforating elements in a retracted position, and means for oscillating said members to project said perforating elements beyond the periphery of said member and into the grooves of said die roll, said elements being so disposed that upon the oscillation of said lever they will presenttheir side surface to the Web with their points slightly in advance, whereby to operate with a tearing action to sever tongues from said web.

8. Perforating mechanism including a die, a rotatable member arranged for co-operation therewith, a lever pivoted at one end to said member and normally disposed upon a chord thereof, a pointed perforating element at the end of the lever, and means for pro- -jecting said pointed element outwardly about the pivot point of said lever when said element vreaches the die.

9. Perforating mechanism including a rotatable member of cylindrical contour, a lever pivotally mountedwithin a recess in. said member and normally disposed on a chord thereof, a perforating point at the free end of said lever, and means for oscillating said lever about its pivot at a predetermined point in the rotation of said fmember.

'10. Perforating mechanism including the combination with a peripherally grooved die roll, of a rotatably mounted skeleton roll comprising a plurality of recessed disks .mounted upon a common axis and spaced to co-operate with ungrooved portions of the die roll, a rock shaft carried in said disks, levers between said disks normally disposed upon chords thereof and mounted for oscillation upon said rock shaft, perforating points at the free endsv of said levers, and means including a cans for effecting the oscillation of said rock shaft at a predetermilrlled point in the'rotation of said skeleton ro 11. The combination with means for striking up triangular tongues in a web of material, of means for folding said tongues back against the'web, andmeans for subsequentlycreasing the tongues as folded.

12. The combination withmeans for sup porting a web of paper and means for striking up a transverse series of tongues therefrom, of means for acting upon said tongues to bend them against the adjacent unperforated portion of the web, and means for creasing said tongues attheir bent portions.

13. The combination with means for continuously moving a .Web of material, of means for striking up tongues from the moving web, and means disposed in the path of said tongues for bending them rearwardly. I

14. The combination with means for supporting and continuously moving a web of material, of means for forming a transverse series of spaced tongues therein, a brush disposed in the path of said tongues and adapted to bend them rearwardly, and means for creasing the bend between said tongues and the Web.

15. A set of rotatable rolls adapted to en gage a web of paper and move it forwardly,

means for striking up tongues from a web prior to its entry between said rolls, and a tact with a web supported from said die, the

point of said element being the first portion thereof to encounter said web, whereby a tongue is partially severed therefrom.

17. The combination with means for suphaving sides converging to a point and pivoted at .a part remote from its point, means for actuating said element about said pivot into contact with a web supported uponsaid supporting means, the point of said element being the first portion thereof to encounter saidweb, whereby a tongue is partially severed therefrom, and means for folding back and creasing said tongue against the adjacent unperforated portion of the web.

18. The combination with a peripherally grooved die roll for supporting a continuously mowing web of material, of a set of perforating points, and means for periodically projecting said points through the moving web in a direction having a longitudinal component relative to the web and opposite to .web movement.

DAVID WILLIAM HUDSON.

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