US1762302A - Center clip - Google Patents

Description

June 10, 1930. J. LITTLE CENTER CLIP Filed Nov. 17; 1927 2 Sheets-Sheet l June 10, 1930. LlTTLE 1,762,302

CENTER CLIP Filed Nov. 1'7, 192'? 2 Sheets-Sheet 2 Z 5 (707; Ziflla Patented June 10, 1930 UNITED STATES PATENT? O FFICE JOHN LITTLE, OF PLAINFIELD, NEW JERSEY, ASSIGNOB T WOOD NEWSPAPER m- GHINEBY CORPORATION, OF NEW YORK, N. Y., A. CORPORATION 03' VIRGINIA.

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Application filed November 17, 1927. Serial No. 233,838.

This invention relates to a center clip for holding the plates ona printing 0 linder at a point between two plates longitu inally located on the cylinder.

'The rincipal object of the invention is to avoid the necessity for a very largehole ordinarily required when the clip is made removable as is necessary in this articular Elace; also to provide a clip ma e in two alves, held in place by means located in one of them and projecting into the other and capable of being separated to enable each half to be removed separately, all co-operating to reduce the hole or opening ordinarily found under the plate at this point, and thus avoiding a large area of plate unsupported at the rear.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had 'to the accompanying drawings in which Fig. 1 is a plan of an intermediate clip formed in two parts according to this invention and sho g)the two parts separated and ready for assem ling or removal; I

Fig. 2 is a similar view showing the two parts of the clip assembled and fixed in position;

Fig. 3 is a sectional view on the line 3-3 of so Fig.2, showing in dotted lines, the plates in position;

Fig. 4 is-a sectional view on the line H of Fig. 2;

Fig. 5 is a view similar to Fig. 1, showing a modification 4I of enabling the pressman to apply single plates of two-page width for ouble page spreads. This necessitates the rovision of a hole of a large size cut out o the cyhnder, thus removing aconsiderable portion of the support under one of the prmtmg plates.

This hole is considerably lar er than the width of the groove in which tfie clips slide, and as the plate is unsup orted under this area it is considered a rawback to good printing. as

The main object of this invention is to avoid this hole, leaving only the groove in which the clip is sup orted. For this purpose, referring to the st four figures, it will e seen that the plate cylinder 10 is provided with a groove 11 extendin longitudinally for receivin the intermediate clip. This groove is un ercut on the sides 12 below. According to this invention it does not have to be enlarged to provide any hole by which the clips are removed.

The way I have shown in these four es for securing this result is to form the chp in two halves 13, these halves being rights and lefts, and each of them having a ledgeld projecting into the undercut oove 12 on one side. The two clips exten clear across the groove as shown 1n the drawings; and engage each other at the center. Each one is provided with a dove-tail 15 extending at 75 right angles to the groove 11, and projecting from the center line outwardly.

In assemblin the parts for the plates, these clips are move along until these two dovetails register, as shown in, Fig. 2, and then two screws 16 are inserted. Each screw has a screw-hole in one iece and each one has a head which projects eyond its ownhalf into a recess 17 in the other half. In this way the heads of these screws secure accurate register 85 and revent the two halves from moving longitu 'nally either to the point of separation or to the point of getting out of actual registration. The dove-tail 15 accurately holds the plate on each side, as indicated in dotted lines in Fig. 3, and the parts are held firmly in position by the screws 16.

To remove the clips, the two screws 16 are taken out, or at least unscrewed so that the heads come out of the recesses 17, and then one of the parts can be slid along so that they are in the relative positions indicated in Fig. 1. N ow both parts can be removed and replaced at will.

The same princ1ple can be carried out in other forms, as for example, inthe form shown in Figs. 5, 6, 7 and 8. This construction is'similar to the one shown in the first four figures, except that the top'of the clip is in one piece and it is only at the bottom that the divisional piece 20 is provided. This latter piece has a projecting portion 21 that extends into the undercut portion of the groove and holds this side of the clip in position. This member 20 also has a projecting horizontal tongue 22 at the bottom, and a tongue 23 at the top projecting into recesses or grooves in the main portion of the clip. The two parts are held together by a single screw 26 which passes through the top of the clip into the tongue 22 and holds the parts firmly together. When this screw is removed, the-two parts, of course, are separated and the lower one can be pushed out at the 20 bottom as indicated in Fig. 5. Then there is no projecting member on the top part of the clip to prevent its being raised out of the groove in the plate.

' It will be seen, therefore that no hole or opening is required except the groove in which the clip is located. This ove has to be employed anyway. The chps'are removed readily and are solidly located in position after adjustment and the fastening up 30 of the screws. There is no material area of the printing plate that is unbacked. Therefore the pr nting-is uniform over its entire surface. H

Although I have illustrated and described only two forms of the invention I am aware of the fact that other modifications can be made therein by any person skilled in the art without departing from the scope of the invention as. expressed in the claims.

40 Therefore I do not wish to be limited to the exact form shown, but what I do claim 1. An intermediate plate clip for a printing cylinder consisting of a plurality of parts, each having mea'nsffor holding it in an undercut groove when the parts are assembled, said parts being separately movable to release the parts from each other.

2. An intermediate plate clip consisting of two relatively slidable parts adapted to be held in a groove in a printing cylinder, whereby either one can be moved longitudinally away from the other to release them both.

3. An intermediate plate clip consisting of two parts, each havin an outer projection at the lower edge for tting in two undercut grooves, a dove-tail on eacho said parts for holding the ends of the two adjacent plates, and means for securing the two parts I69. together ina groove inthe printing cylinder.

4. As an article of manufacture, an intermediate plate clip consisting of two partS,'

the two parts together being ada ted to fill a groove in a printing plate cylin er, a screw 05 located in one part and engaging the other opgosite to hold the two parts together, and means on each part for holding that part'in radial position in the groove when they are secured together, said parts being slidable longitudinally in the groove past each other when the screw is removed.

5. As an articleof manufacture, anintermediate plate clip for a rinting cylindercomprising two parts, eac part having a main body rovided with an outer ro ection at the bottom and a dove-tail cated transversely at the topand extendin outwardly from the center thereof, where iu the two parts are adapted to come together at the center to forma complete clip, a screw threaded in each part and having a head projecting over into the other part across the center each part having anarcuate recess for recei the head on the screwof the other part to prevent longitudinal separation when the screws are in position.

6. The combination with a printing cylinder having a groove extending longitudinally and provided with undercut recesses at its opposite sides, of a plate clip having a dovetail ontop for engaging the beveled edges of two adjacent plates on the cylinder, said plate clip consisting of two parts, each part having an outwardly extending projection enteringthe undercut groove, and a screw for holding the two parts together firmly, whereby when the screw is removed the two parts can be separated in the groove'longitudinally.

7. An intermediate 'plate clip for a printing cylinder consisting of a plurality of parts,

each having means for holding it in an under- 7 cut groove when the parts are assembled, said parts being separately movable with respect to each other to release the parts from each other in a direction alon the groove.

In testimony whereof have hereunto affixed my signature. I

JOHN LITTLE.

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