US818065A

US818065A - Paper-cutting device.

Info

Publication number: US818065A
Authority: US
Inventors: William J Ward
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-11-11
Filing date: 1904-11-11
Publication date: 1906-04-17
Anticipated expiration: 1923-04-17

Description

No. 818,065. PATENTED APR. 17, 1906. W. J. WARD.

' PAPER CUTTING DEVICE.

2 SHEETS-SHEET 1.

WITNESSES:

ATTORNEY PATENTED APR. 17, 1906.

W. J. WARD.

PAPER CUTTING DEVICE.

APPLICATION FILED NOV. 11 1904.

2 SHEETS-SHEET 2.

A TTOR/V E Y WITNESSES:

UNITED srAr s PATE NT OFFICE.

PAPER-CUTTING DEVICE.

' Specification of Letters Patent.

Patented April 17, 1906.

Application filed November 11,1904. Serial No. 232,356.

To 00M whom it may concern:

Be it known that 1, WILLIAM J. WARD, a citizen of the United States, residing in the city of New Rochelle, county of Westchester, State of New York, have invented ,a certain new and useful Paper-Cutting Device, of which the following is a specification.

This inventitn relates, primarily, to means for severing a web of paper into sheets after the printing of the web and before the folding of the sheets, and is in the nature of an improvement on devices of this class heretofore employed in web perfecting and folding machines, although the invention may be used for other purposes or in other machines.

It is often required to sever a large number of superposed webs or plies of web simultaneously, these plies being assembled before passing between the cutting-cylinders, and hence it is necessary that the teeth project considerably from their cylinder, since each tooth must fully penetrate the most remote ply of aper in order to insure the severing of same y the series of teeth. Owing to this great projection of the teeth, especiallywhere many plies of web are to be punctured, it happens that the position of the teeth (viewed edgewise) when entering the groove in the opposing cylinder is at a considerable angle to their position when emerging from the groove, and the groove consequently is made very wide and ample to avoid contact of the teeth with the sides thereof; but this width of the groove is a great detriment, since the edges of the recess are necessarily so far apart that they do not afford a suflicient support for the web, and the teeth tuck the web into the groove, thereby not only spoiling the register of the sheets, which is a great objection, but also making a jagged out, which is unsightly and objectionable, besides which there is a constant liability of the web becoming caught and torn, causing a delay for stopping the press, removing the debris, and getting the press into operation again, which is a serious matter, since, for instance, a delay of a few minutes often entails the lo ss of the sale of almost an entire edition of a newspaper.

The principal objects of my invention are to make a cleaner cut of the paper and to avoid the liability of tucking the web into the groove or of tearing the same.

In carrying out my invention, I preferably employ a cutting-blade provided with teeth of the ordinary kind, each having an inclined cutting edge, but which are incapable of such projection during the cutting operation that their punctures will unite to form a single continuous cut 8.01"; ss the web, and during the penetration of the web by the teeth I contrive to give the teeth a movement longitudinally of the cylinder, so that the teeth not only puncture the paper, but also lengthen the punctures by such endwise movement, which movement is preferably sufliciently great to unite all the punctures, making a single cut. This may be accomplished, although only the tips of the teeth penetrate the web instead of forcing the teeth bodily through the paper, as heretofore, since the longitudinal movement of the teeth compensates for their slight penetration of the paper. Moreover, the tips of the teeth project only a very little into the groove in the opposing cylinder, so that the teeth occupy said groove during a shorter period of the revolution and there is hence less angular movement of the teeth while in the groove. Thus it results that the groove may be made so narrow as to substantially fit the teeth, or, in other words, the edges of the groove may be brought very near together, so that an ample support is given to the web during the severing operation, avoiding liability of tucking the web into the groove or of tearing the web and making a clean unbroken cut the entire width of the web.

In the accompanying drawings, Figure 1 is an end view of a pair of geared cutting and feeding cylinders rovided with my improvements. Fig. 2 s ows the cylinders seen at Fig. 1, but with the severing-blade in a plane joining the axes of the cylinders, the websevering teeth penetrating the groove in the opposing cylinder and the out being done or nearly done. Fig. 3 is a partly sectional side elevation of the cylinders with the parts in the positions seen at Fig. 2. Fig. 3" 1s a plan of a fixed groove-cam by which the cuttingteeth are reciprocated. Fig. 4 is an elevation, and Fig. 5 a plan, of a box to hold and guide the reciprocating knife, the box being secured to the cylinder in a well-known manner. Fig. 6 is an end elevation of the box with its appurtenances, including the knife. Fig. 7 is a side elevation of a reciprocating knife-carrying bar mounted within the box. Fig. 8 shows side and end elevations of a spring-pressed cheek block or bar contiguous to the knife for biting the web against the I ture or cut of the same or greater length is secured by my invention by projecting only the tip of the tooth through the paper, a large portion of the out being due to the movement of the tooth across the paper. Fig. 11 gives for comparison two views, one showing the body of a tooth projecting into the opposing groove in the usual manner, the groove being widened, as usual, to accommodate the different angular positions of the knife due to its rotation, and the other shows the slight projection of the tips of the cutting-teeth into the groove due to my invention, as well as the substantial fit of the groove to the teeth.

The invention is applied to apair of cutting and feeding cylinders 1 2, between which runs the single or multiple ply web 3. The upper cylinder 1 is shown of double the diam eter of the lower 2 and making one revolution to two of the latter; but obviously the cylinders may be of equal size within the scope of the invention and maybe used for other pur-- poses besides cutting and feeding. The cylinders turn in the direction indicated by the arrows, and the web 3 is seen advancing horizontally, although by turning the view quarter-way around it will re resent the web moving vertically down. T e cylinders are connected by gears 4 5, either of which may be the driver, and are journaled in the usual framework 6 7.

bolts 11.

Upon the cylinder 2 and extending longitudinally thereof is a knife-box 8, having sides 9 10 and secured to the cylinder by Extending the length of the box is an endwise reciprocatory bar 12, occupying about half the width of the box. To the in nor side of this bar are detachably secured blade-sections 13 by means of screws 14, each blade having its outer edge formed with a series of serrations or teeth 15 and the sections being placed end to end, so as to make practically a continuous blade. Cross-pins 16, extending between the walls 9 and fixed therein, fit in longitudinal slots 17, cut in bar 12 and'in the blade-sections and prevent the bar and blade from rising. The remainder of the box is occupied by a cheek block or bar 18, movable radially of the cylinder and constantly pressed outwardly by coiled springs 19, for which seats are formed in the bottom of the box. The bar 18 has guide-slots 21 to fit the cross-pins 16 and is also pro vided with recesses 22 to accommodate the heads of screws 14, it being understood that the bar 18 bears directly against the blade 13. The cheek-block 18 pinches the web 3 against thecylinder 1 in the usual manner. It is usually made in four sections placed. end to end like the knife-sections.

The knife-bar 12 is extended at 23 to overhang the end of the cylinder 2 and provided with a roller-stud 24, which runs in a roove 25, formed upon the periphery of a hollow boss 26, secured by bolts 27 to the side 7 of the frame. At its top the groove is formed with an oblique cam-surface 28, the engagement of the roller 24 with which during the rotation of the cylinder forces the knife-bar 12 to move endwise along the cylinder, this movement of the knife-bar being simultaneous with the puncturing of the web by the teeth 15, because of their projection from the cylinder, so that the movement of the teeth with reference to the web is oblique, so that a longer incision is made by each tooth in the paper than would be the case if the tooth were fixed upon the cylinder and penetrated the paper to the same extent. The ortion of the incision due to the longitudina movement of the tooth is seen at 29, Fig. 10, and this portion, taken with the portion due strictly to the penetration of the tooth, equal the puncture 30, made heretofore by causing the entire body of the tooth to penetrate the paper. Each tooth 15 therefore makes an incision greater than the width of the tooth at its intersection. with the web, and these incisions taken together completely sever the web. Preferably, the length of the stroke of the knife-bar is a little greater than the pitch of the cutting-teeth. The return stroke of the knife-bar is efiected, preferably, after the cut is completed by a cam-surface 31, formed in said groove 25. The movements of the teeth may, however, vary or be otherwise effected within the scope of the invention.

In the usual channels 32, provided upon the cylinder 1, is provided a wooden bar 33, having a rubber facing 34, having a groove to receive the tips of the teeth, and since the latter penetrate the groove only slightly the sides of the latter run almost in contact with the teeth, and hence afford a support for the web during the severing operation, with the advantages already explained. The upper part of Fig. 11 shows for comparison the usual projection of the entire body of the teeth into the groove and the consequent great width of the latter.

During the cutting operation the knife-bar is moved to the left, as seen at Fig. 7, so that the inclined or oblique edges 36 of the teeth are advanced longitudinally of the paper, and owing to the length of the stroke, which is preferably slightly in excess of that necessary to cause the incisions to join one another, a olefin or smooth out is produced across the we It will be observed that during the cutting operation the teeth never project beyond the surface of the cutter cylinder or roll a distheir punctures into a continuous cut, and

tance greater than the height of the teeth, so that wlthout a longitudinal movement of the knife at the cutting operation only a series of separate perforations would be formed.

Having thus described my invention, I claim- 1. In a mechanism for severing a web into sheets, the combination with a pair of revolving cylinders between which the web runs, of a cutting-blade having teeth and extending along one of said cylinders, said blade so mounted that the teeth are incapable of projecting from the surface of the blade-cylinder, during the severing operation, a distance greater than the height of the teeth, and means for moving the blade endwise inde pendently of its cylinder when it is in position to coact with the other cylinder in severing the paper.

2. In combination, a pair of revolving cylinders, a cutting-blade having teeth and extending along one of said cylinders, said blade so mounted that the teeth are incapable of projecting from the surface of the blade cylinder, during the severing operation, a distance greater than the height of the teeth, and means for causing the teeth to penetrate the web in a single direction diagonal to the length of the blade throughout the web-severing operation.

3. In combination, a pair of revolving cylinders, a cutting-blade having teeth and extending along one of said cylinders, said blade so mounted that the teeth are incapable of such projection from the cylinder during the cutting o eration that their punctures will unite to orm a single continuous cut across the Web, means for moving the blade endwise during the entire Web-cutting operation, and means for returning the blade to normal endwise position.

4. In combination, a pair of revolving cylinders, a series of cuttingteeth extending along one of said cylinders and each having an inclined cutting edge, means for advancing said teeth longitudinally of the cylinder with their inclined edges foremost during the webpenetrating movement of the teeth, and independently of their cylinder, and means for retracting the teeth.

5. In combination, a pair of revolving cylinders, a series of cutting-teeth extending along one of said cylinders, a cooperating bar in the other of said cylinders, said bar having a longitudinal recess, the Width of which does not substantially exceed the thickness of the teeth, the latter being so mounted as to be incapable during the web-cutting operation of projecting into said recess so far that their punctures would unite to form a continuous cut across the web, means for moving the teeth longitudinally of their cylinder during the web-severing operation, so as to form means for returning the teeth to original position.

6. The combination of a revolving cylinder, a bar parallel with the axis of the cylinder and extending along the same and mounted for movement parallel with said axis, a toothed cutting-blade detachably secured to said bar, a bearing, means upon said bar to engage said bearing to effect such endwise movement of the bar during the web-puncturing operation of the teeth, and a cooperating cylinder.

7. A paper-cutting device com rising a box, a knife-bar movably mounte therein, knives with teeth thereon, each tooth having an inclined cutting edge, and mechanism for giving the knives an oblique edgewise move ment, with said inclined edges foremost, relatively to the paper, during the entire paper cutting operation.

8. The combination of a revolving cylinder, a bar extending along the same and mounted for movement endwise of the cylinder, a series of bladesections detachably secured upon said bar end to end and having cutting-teeth with inclined edges, a fixed peripheral cam-groove concentric with the cylinder-axis, a stud upon said bar running in said groove, to effect reciprocation of the bar, and a cooperating cylinder.

9. A paper-cutting device, comprising a box, a knife-bar, knives With teeth thereon, a stud fastened to said knife-bar, cheek or guide blocks, and guide-pins for said cheek or guide blocks and knife-bar.

10. A paper-cutting device, comprising a box or casing, a knife-bar mounted therein, knives with teeth fastened to said knife-bar, cheek or guide blocks, springs for said cheek or guide blocks, means for moving the knifebar, and pins for guiding the knife-bar.

1 1. The combination with a pair of revolving cylinders between which the web runs, of a serrated cutting-blade extending along one of said cylinders, but so mounted as to be incapable of punching slits of suflicient length to make a complete severance of the web, and means for moving said knife endwise during the slitting operation, sufliciently to merge the slits into a single cut, completely severing the web, means being provided for so guiding said blade that its serrations or teeth do not project beyond the surface of its cylinder a distance greater than the height of said teeth, during the slitting operation.

12. In combination, a pair of revolving cylinders, a projecting serrated cutting-blade extending along one of said cylinders, but capable of making only a partial severance of the web by reason of its projection from its cylinder, and means for moving the blade parallel with the axis of its cylinder during the entire time in which the blade is in contact With the Web .until the latter is completely severed, and means for returning the blade to normal endWise position. i

13. In combination, a pair of revolving cylinders, a series of cutting-teeth extending along one of said cylinders and each having an inclined cutting edge, said teeth projecting from their cylinder only enough to effect a partial severance of the Web, and means for advancing said teeth With their inclined edges foremost during the penetration of the Web by the teeth, so as to effect a complete severance of the Web.

' 14. In combination, a pair of revolving cylinders, a series of cutting-teeth extending along one of said cylinders, a cooperating bar in the other of said cylinders, said bar having a longitudinal recess which is, about equal in Width to the thickness of the teeth, and the latter being so mounted that their tips barely project into said recess during the revolution of the cylinders, so as to be capable by reason of such projection to effect only partial severance of the Web, and means for moving the teeth longitudinally of their, cylinder during the penetration of the Webby the teeth; Boas to enlarge the punchesinto a continuous-cut,

thereby completely severing the Web means being provided for returning the teeth to original position.

15. 'A Web-severing cylinder or carrierprovided With a set of cutting-teeth, means cooperating With said teeth to enable the latter to penetrate the Web, the constructionand arrangement being such that 'thew'ebis only partially severed by the penetration ofthe teeth, and means for moving the teeth in a-direction substantially parallel With the cylinder-axis during their action upon the-Web, so as to merge their incisions into a continuous out completely severing theweb; 'means being provided for returning the teeth tonorm'al position.

WILLIAM 4 J WARD.

' Witnesses:

C. A. WIoK, 'ABNER' B. STUPEL.