US2291863A - Chuck for paper rolls - Google Patents

Description

Aug. 4, 1942. c. c. BAKER CHUCK FOR PAPER ROLLS Filed Oct. 28, 1940 2 Sheets-Sheet l Inventor Craig C Baker Aug, 4, 1942. c. c. BAKER CHUCK FOR PAPER ROLLS Filed Oct. 28, 1940 2 Sheets-Sheet 2 Inventor Grazlg' C Baker Qtoreys Patented Aug. 4,1942

2,291,863 CHUCK FOR. PAPER ROLLS Craig 0. Baker, Portland, Oreg.

Application October 28, 1940, Serial No. 363,178

3 Claims. (Cl. 242-72) My invention relates to means for mounting heavy rolls of paper on reels or the like, particularly on reels in printing presses of the news-* paper type, and my invention relates more specifically to chucks adapted to be inserted in the ends of the tubular cores on which newsprint paper is customarily wound.

While such paper is sometimes wound in the mills on specially prepared metal cores, which have key-ways arranged for use on the reels of the newspaper printing presses, these special cores are expensive and the cost and inconvenience involved in returning these cores to the mills, when the paper on them has been used up, have prevented the adoption of their use to any considerable extent.

An object of this invention is to provide a chuck which can be used with a heavy roll of paper wound on the usual inexpensive cardboard tube or core, and which can quickly and easily be inserted in the core to hold the core and the paper wound on it securely in place.

In modern printing presses of the newspaper type, it is necessary to impart rotation to each new roll of paper added to the press before starting to unwind the paper, so that the paper on the new roll can be joined to the paper from the preceding used roll without entirely stopping the press. For this purpose it is customary to mount the rolls on suitable spindles or stub shafts which are capable of being rotated by a mechanism associated with the press reels. Another object of my invention, accordingly, is to provide a chuck adapted to be mounted on a printing press reel and to be rotated by a rotating stub shaft or supporting stud on the reel, which is driven at predetermined speeds, and thereby permit such rotation to be imparted to the heavy roll of paper.

When the paper from the new roll is to be attached to or near the end of the paper from the preceding roll, without entirely stopping. the movement of the paper web thru the printing press, it is customary to equip this part of the printing press machine with automatic pasting mechanism, which is generally arranged so as to operate to force the end of the new roll, to which adhesive is applied, and the adjacent surface of the paper on the used roll firmly together and thus cause the paper of the new roll to be stuck securely to the paper from the used roll. In order to have this take place entirely auto matically and satisfactorily while the press is operating, it is necessary to have the rotation of the new roll, accurately synchronized with the automatic movement of the supporting reel and with the action of the pastor. A further and important object of my invention, therefore, is to attain this proper synchronization by providing a chuck having means whereby the outer ends of the paper on the roll on which the paster is to operate will be definitely located and fixed with respect to the rotating mechanism, so that the mechanism can all be accurately timed with respect to such outer end of the paper on the new roll.

The above mentioned and incidental objects I attain by using a chuck, made as described briefly in the following specification and as illustrated in the drawings, in combination with a printing press reel and associated mechanism hereinafter referred to.

In the drawings:

Fig. 1 is a half side elevation and half medial longitudinal section illustrating the general construction of my improved paper roll chuck;

Fig. 2 is an end elevation as viewed from the right hand end of Fig. 1, with the chuck jaws slightly extended;

Fig. 3 is a transverse section taken on the line 33 of Fig. 1;

Fig. 4 is a projected end elevation showing my chuck in operative position in the core 'of a roll of newsprint and illustrating certain important features of my device; and

Fig. 5 is a schematic outline of a reel of a printing press and certain appurtenances that relate to my invention in use.

Referring first to Figs. 1, 2 and 3, my paperroll chuck consists chiefly of a substantially tubular body provided at one end with a hub of larger diameter, a gage plate attached thereto, a plurality of radially extensible jaws disposed in longitudinal apertures in the body, and a central spindle arranged to extend the jaws by rotation of a socket-head screw accessible from the interior of the hub.

The substantially cylindrical body, indicated generally by the numeral I 0, is of uniform diamter throughout the major portion of its length, but at one end is enlarged to form a hub II which is recessed as at I! to conform with, and receive, the tapered end of one of the stub shafts of the printing press reel as will presently appear.

The body II] has a concentric bore extending from the inner extremity (i. e. from the right hand end as viewed in Fig. l) to an aperture 13 located adjacent the integral hub wall M. In this bore a jaw-actuating spindle I5 is disposed for axial sliding movement. The spindle 15 has symmetrical bearing surfaces at II and I1, and is formed with an intervening'series of peripheral shoulders I l, in the form of cone frustrums, which constitute inclined bearing surfaces at spaced in-' tervals for the correspondingly inclined beveled projections l8 machined on the inner surfaces of the jaws 20.

The jaws 2Q are radially disposed in suitable apertures provided in the body I. and are retained therein by pins 2| threaded, or otherwise secured, in the ends of the body and extended ,into elongated holes 22 formed in each end of 23 'or is otherwise serrated to increase the gripping action of the jaws when the chuck is in operative position in the core of a roll of paper. Longitudinal movement of the spindle l and the consequent radial motion of the jaws 20 to increase or decrease the effective diameter of the chuck is produced by the rotation of an adjusting screw 24, the head 25 of which bears against an annular shoulder 25 formed in the hub wall 14 and the threaded portion of which passes through a clear hole therein and extends into a correspondingly threaded hole 21 provided in the end of the spindle IS. The spindle I5 is prevented from rotating with the screw 24' by a guide pin 28, threaded or otherwise secured, in the opposite end of the body and bearing in a suitable groove 29 (shown dotted in Figs. 1 and 2), cut in the extending end of the spindle l5. Thus the spindle I5 is confined to linear or longitudinal motion with respect to the body It. Since the head 2! of the adjusting screw is not readily accessible with an ordinary wrench because of its recessed position in the hub II, I have found it advisable to make the head of the adjusting screw of cylindrical form and with a central hexagonal or square socket for receiving the stem of a suitable crank or wrench.

The hub I l is provided with a keyway 34 (see Figs. 1 and 4) adapted to coincide with a key in the stub shaft of the printing press reel, on which the roll of paper is to be mounted. On the outer surface of the hub, removed a given angular distance from the center of the keyway 30, a gage plate ii is securely fastened, as shown in Fig. 4. On the face of this plate 3| I provide a pair of suitably spaced gage lines or grooves 22 in parallelism with the axis of the chuck. The function of these gage lines will presently appear in the description of the use of my chuck.

When a roll of paper is to be mounted on the reel of a printing press, it is customary to prepare the end of the paper on the new roll in such manner that, when the roll is swung into position adjacent the web of the expiringroll, the paper of the new roll may be joined to the web of the previous roll to make a continuous sheet entering the printing press. In conventional high speed presses, this joint or splice is made without interruption in the uniform speed of the presses, by automatic action of the paper-rollcarrying reel and an automatic splicer or paster properly synchronized therewith. such an arrangement is illustrated in schematic outline in Fig. 5. The reel a comprises a pair of spaced which is journaled in suitable bearing standards 0. The reel'a is so arranged that it rotates intermittently in clockwisev direction, and thatone pair of arms d of the spaced spiders a supports a a full roll of newsprint e, another pair of arms I carries the roll a which is being unwound while a third pair It will be ready to receive the new roll 1. When the paper is nearly unwound from the roll 0, the periphery of" the full roll e is brought into contact with the web 1 from the expiring roll a as indicated by broken lines in Fig. 5. Furthermore, means is provided on the arms of the reel 41 so that as the roll 0 is brought nearer the web 1 of the roll a, the roll e will be rotated counter clockwise at increasing speed until, when the roll e actually contacts the web 1!, the peripheral velocity of the roll e will coincide exactly with the linear velocity of the web 1. At the instant of contact, the automatic splicing attachment m presses the web tightly against the outer surface of the roll e, and so connects the web of the expiring roll 0, to the roll e. Another device (not shown) subsequently severs the old web. Since this entire splicing operation requires but a fraction of a second, it is important that the prepared splice 0n the rolls of paper should be in a predetermined location on the surface of the roll with reference to the rotating mechanism.

When a new roll of paper is to be mounted on the reel of the printing press, my chuck is inserted in one'end of the core, thus in the end of roll i shown in Figs. 4 and 5, and the chuck is made fast in the core by turning the head 2! (Fig. 4) of the adjusting screw 24 (Fig. 1) thereby tightening the screw 24, causing longitudinal movement of the spindle is, and consequent radial extension of the gripping jaws 20, which operation anchors the chuck securely in the core of the roll. The strip or portion of the outer surface of the paper on the roll which is to be used for slicing or attaching the paper of the new roll to the paper of the used-up roll is then marked off in radial alinement with the lines 32 of the gage plate II. This marking can very quickly and easily be done, for example, by using a template. Paste is then applied to this marked-off splicing portion on the roll, which splicing may be cut into tabs t (Fig. 4). Any suitable chuck may be used for the opposite end of the roll. The new roll i is now moved into place between the arms 71. of the spiders a. of the reel a, and stub shafts are extended from the arms it into the chucks. The stub shaft 3' (Fig. 5), which is adapted tobe rotated by suitable mechanism (not shown) is provided with a key (not shown) which fits into the keyway 30 of my chuck, thus forcing the chuck, and with it roll 1,

to turn with the stub shaft 3' as the latter is rotated. But, since the gage plate 3| is set in predetermined proper position with respect to the keyway 30, and since the splicing end or tabs t of the roll are located with respect to the gage plate 3|, as previously mentioned, it is possible to synchronize the rotating mechanism for the stub shafts s, the rotating mechanism for the triple-arm spiders a keyed to a common shaft b specific type of reel or pasting device, for my chuck is adapted for general use in heavy paper mils in place of the various chucks, substitute cores, and similar devices which have been tried out heretofore.

I claim: v

1. A chuck of the character described for a paper roll, said chuck including, a substantially cylindrical body, said body being of uniform diameter throughout the major portion of its length but having a hub of larger diameter at its outer end, said hub having a recess to receive the end of a supporting stub shaft of a printing press reel when the roll is inserted in place on said reel, means in said recess adapted to be engaged by a cooperating element on the end of said printing reel stub shaft to prevent slippage of said stub shaft in said recess when said stub shaft is rotated, a plurality of radially-extendible jaws disposed in longitudinal apertures in said chuck body, a longitudinally-slidable, jawactuating, spindle in the center of said body, said spindle having a series of inclined peripheral shoulders and said jaws having inwardly-extending projections for engaging said shoulders, an adjusting screw for eflecting longitudinal adjustment of said-spindle within said body and therewith radial motion of said jaws, the head of said adjusting screw bearing against a shoulder in the wall of said hub and accessible within the recess of said hub, means for preventing the rotation of said spindle within said body but permitting longitudinal movement of said spindle, and guiding means on the outer surface of said hub to facilitate the proper positioning of the chuck within the roll with respect to the splicing strip on the outer surface of said roll.

2. In a printing press a chuck of the character described for a paper roll, said chuck including, a substantially cylindrical body having a hub of larger diameter at its outer end, said hub having a tapered recess to receive the end of a supporting stub shaft of a printing press reel when the roll is inserted in place on said reel, means in said recess adapted to be engaged by a cooperating element on the end of said printing reel stub shaft to prevent slippage of said stub shaft in said recess when said stub shaft is rotated, a plurality of radially-extendible jaws disposed in longitudinal apertures in said chuck body, a 1ongitudinally-slidable, jaw-actuating, spindle in the center of said body, said spindle having a series of inclined peripheral shoulders and said jaws having inwardly-extending projections for engaging said shoulders, an adjusting screw for eifecting longitudinal adjustment of said spindle within said body and therewith radial motion of said jaws, the head of said adjusting screw bearing against a shoulder in the wall of said hub and accessible within the recess of said hubthe threaded end of said screw extending into a threaded aperture in the end of said spindle, means for preventing the rotation of said spindle within said body but permitting longitudinal movement of said spindle.

3. In a printing press, a chuck of the character described for a paper roll, said chuck comprising, a substantially cylindrical body having a hub of larger diameter at its outer end, said hub having a recess to receive the end of a supporting stub shaft of a printing press reel when the roll is inserted in place on said reel, a keyway in said recess adapted to be engaged by a cooperating element on the end of said printing reel stub shaft to prevent slippage of said stub shaft in said recess when said stub shaft is rotated, a plurality of radially-extendible jaws disposed in longitudinal apertures in said chuck body, a longitudinally-slidable, jaw-actuating, spindle in the center of said body, said spindle having a series of inclined peripheral shoulders in the form of cone frustrums and said jaws having inward1y-extending projections for engaging said shoulders, an adjusting screw for efiecting longitudinal adjustment of said spindle within said body and therewith radial motion of said jaws, the head of said adjusting screw bearing against a shoulder in the wall of said hub and accessible within the recess of said hub, the threaded end of said screw extending into a threaded aperture in the end of said spindle,'a wrench-accommodating socket in the head of said screw, means for preventing the rotation of said spindle within said body but permitting longitudinal movement of said spindle, and guiding means on the outer surface of said hub to facilitate the proper positioning of the chuck within the roll with respect to the splicing strip on the outer surface of said roll, whereby said chuck can be secured in the core before the said roll is moved onto the printing press reel and said chuck will insure the proper placing of said roll when the stub shaft of the reel engages said recess.

CRAIG C. BAKER.

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