US1537979A - Printing press - Google Patents

Description

May 19, 1925.

C. J. WRIGHT PRINTING PRESS ile 1921 Z SheetS-Shee t 1 C. J. WRIGHT PRINTING PRESS May' w, 1925;

- 2 sheets shaet 2 Filed Oct. '7, 1921 Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

CHARLES J. WRIGHT, F CLEVELAND, OHIO, ASSIGNOR TO THE HARRIS AUTOMATIC rnnss coMrAN or CLEVELAND,

OHIO, A conrona'rron or OHIO.

PRINTING rnrss.

Application filed October 7, 1921. Serial 110. 506,138.

To all whom it may concern:

' Be it known that I, CHARLES J. WRIGHT, a citizen of the United States, and a resident of the city of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Printing Presses, of which the following is a specification, reference being made to the accompanying drawings,

thereof.

My invention relates more particularly to rotary printing presses of the twocolor type, and the object of my invention is, among other things, to provide a simple yet effective means to obtain accurate registration of the colors which are being printed on the paper. I accomplish this object by mounting the transfer cylinder so as to be transversely shiftable on its support, and I further provide means for slightly shifting such transfer-cylinder laterally in either direction to a predetermined requirement, and then maintaining such means in the correct position to obtain proper registration of the colors on the paper that is being printed while the press continues in operation. The accompanying drawings show theembodiment of my invention in a two color off-set press, the same serving to fully explain the invention, which is notrestricted, however, to any particular form of rotary presses, improvement is s1nce my equally applicable to a twocylinder press in which the two impression cylinders are connected bya shiftable transfer cylinder, or to other types of presses.

In the drawings Figure 1 is a skeleton side elevation view of a two-color ofi-set press connected by a transfer cylinder which may be transversely shifted to illustrate my invention;

Figure 2 is an enlarged sectional View taken on the line 22 of Fig. 1 looking in the direction of the arrow;

Figure 3 is a section taken on the line 3'3 of Fig. 2 looking in the direction of the arrow; and

Figure 4 is an enlarged section taken on the line 4- 1 of Fig. 2 looking in the direction of the arrow.

Similar numerals refer to similar parts throughout the several figures.

Referring to the construction shown in forming a partgear wheel 25 Figure l, the frame-work 5 supports the bearings of the two plate or form-cylinders 6 and, 7 the twarubber cylinders8 and 9, and the two impression-cylinders 10 and 11. Between the two impression-cylinders 10 and 11 18 "arranged the transfer-cylinder 12 mounted on the shaft 13 journalled in the frame 5, the cylinder 12 being slightly shiftable in .either direction .on the shaft 13 which has the gear 14 (Fig. 2) to enmesh with the gears (not shown) of the cylinders 10 and 11'. The cylinders 10, 11 and 12 have the grippers 10, 11 and 12 respectively, carrymg and releasing the successive sheets in suitable timed relation. All seven cylinders are relatively arranged with respect to each other as shown in Fig. 1, and are geared together to rotate in unison.

Referring more particularly to Figs. 2, 3 and 4, I have ,secured to the inner side of the frame 5 the bracket15 on which is rigidly secured the upper and larger portion 16 of a circular guide plate 17 through which the shaft 13 loosely passes as shown in Fig. 1 3. The lower and smaller portion 18 is pivotally secured to the portion 16 by pins 19 so that this lower portion 18 may be moved transversely of the press, such parts comprising an adjustable-throw-cam. The transfer-cylinder 12 has secured to its lefthand end (Fig. 2) the bracket'20 on which are, rotatably mounted two spaced-apart rollers 21 and 22 so arranged that'each roller bears frictionally on opposite sides of the guide plate 17 as shown in Fig. 2. When the cylinder 12 is revolved the rollers 21 and 22 travel in a circular path within the edge of the guide plate 17 as shown in Figs; 2 and 3.

Means are provided to move the lower portion 18 transversely on the pins in either direction at will and to any predetermined inclination: The portion 18 has aflixed thereto the bracket 23 to which is" pivoted the screw-bolt 24 extending outwardly through an opening formed in the frame 5 as shown in Fig. 2. Threaded on the bolt 21 is the g ar wheel 25 which is-journalled in the frame 5 and rotatedby a worm 26 mounted on the shaft 27 journalled in the brackets 28 secured to the frame 5. worm 26 is turned in either direction by the handle 29 secured to the shaft 27 as shown. Mounted, on the inner end of' the is the plate 30'having the 31 cut therein within which 110 segmental slot The U cordin' slot is the pin 32 aflixed to the frame 5 as shown in Figs. 2 and 4. This pin and slot arrangement limitsthe rotation of the gear wheel in' either direction by the pin engaging with the ends of the slot. The outer surface of the gear wheel 25 preferably has the graduated scale marks 33 cut therein to co-act with the indicator or pointer 34 suitably secured to the frame 5 to enable the op-' erator to set the lower portion 18 of the guide plate 17 at any predetermined inclination in order to shift the cylinder 12 acgly. The method of operating my improved attachment during the operation of the press is shown in Fig. 2: When the cylinder 12 is rotating in the position shown in full lines, the lower portion 18' of the guide plate 17 is in direct vertical alinement with the-- fixed .upper portion 16 and the rollers 21 and 22 are revolving each in vertical mutually parallel planes on either side of the guide-plate 17 all as shown in'full lines in Fig. 2. Should it be necessary in securing correct registration of the two. colors to slightly shift the cylinder 12 to the left on the shaft 13 as shown in dotted lines, the operator turns the handle 29 to rotate through several degrees the gear wheel 25 manner the cylinder 12 may be shifted to opposite direction.

the right by turning-thehandle 29 in an The pin 32 engaging,

- either end of the slot 31 prevents the operator'from unduly turning the gear wheel 25.:

' and the scale 33' and indicator 34; enable him to set such wheel at'an accurate--prede termined amount so as to obtain, precise regv istration of the colors used on the press.v

The shifting of the cylinder 12 to its predetermined position begins afterthe'printing is complete for the first color, and such transverse movement is completed before the leading edge of the sheet having the first color is released and transferred to the impression cylinder for the second color.

Furthermore the cylinder 12 is restored 'to its normal transverse posit-ion before the leading. edge of the next successive sheet is transferred to the cylinder 12,, all irrespective of the direction or extent of the shifting of such cylinder.

My invention, in its broader aspects, is not limited to the particular construction and arrangement of cylinders and parts shown, as many changes may be made with-* out departing from the main principles of sions.

shiftable on its transverse'support.

the invention and" without sacrificing its chief advantages. "Furthermore my improvements may be used on any multicolor press havin a single impression-cylinder coacting at different periods with two .printing surfaces, the impression-cyllnder being shiftedbetween the two printing impres- I claim as myinvention V 1. In a printing-press, a'pair of sheetcarrying' members, and aninterposed 00- actingsheet-carrying me mb er,- laterally- 2. In a printing-press,.a pair of sheetcarrying members, and an interposed coacting transfer-cylinder, and. means for shifting said transfer-cylinder laterally with respect tothe pair of sheet-carrying members. 7

3. In a printing-press, a pairv of sheetcarrying members, and an interposed coacting transfer-mechanlsm, and means for 1 .shlftlng 1n either d rection sald transfermechanism laterall-y'w'ith respect to the pair of-sheet-carrying members at will. 4. In a printing-press, a pair of sheetcarrying members, and an interposed co- 1 acting transfer-cylinder, and means for shifting said transfer-cylinder laterally with respect to the pair oflsheet carrying members while the press is in operation.

5. In a printing-press, ,a pairof sheetcarrying members, an interposed .coacting transfer-cylinder, and means for shifting in either direction said transfer-cylinder laterally with respect to the pa'lr of sheetcarrying members while the press is in operation. 1

6. In a two-color printmg press, a pair of impression-cylinders, an interposed coac'ting transfer-cylinder, and -means for shifting in either direction saidtransfercylinder transversely wlth respect to said.

impression cylindersv While the press is in operation.

7. In a two-color printing press, a pair of impression-cylinders, an interposed coacting transfer cylinder, means for shifting in either direction said transfer-cylinder transversely with respect .to saidimpression cylinders while the press is in operation,

and means to limit the action of said shifting means in either direction.

8. In a printing-press, .a .pair of sheetv carrying members, an interposed coacting transfer-cylinder, means comprising an adjustable-throw-cam to shift said transfercylinder with respect to said pair, of. sheetcarrying members, and means; to regulate the throw of said cam to any predetermined inclination whereby the shifting of the transfer-cylinder may be fixed toa predetermined amount.

9. In a printing-press, a pair of sheetcarrying members, an interposed coacting transfer-cylinder, means comprising an adjustable-throw-cam to shift said transfercylinder with respect to said pair of sheetcarrying members, means to regulate the throw of said cam to any predetermined inclination whereby the shiftingof the transfer-cylinder maybe fixed to a predetermined amount, and means to limit the action of said shifting means in either direction.

10. In a two-color printing press, a pair of impression-cylinders, an interposed coacting transfer-cylinder, and means comprising an adjustable-throw-cam acting on said transfer-cylinder for moving the latter transversely with respect to said impressioncylinders.

.11. In a two-color printing press, a pair" of impression-cylinders, an interposed coacting transfer-cylinder, and means comprising an adjustable-throw-cam acting on said transfer-cylinder to move the latter transversely in either direction withv respect to said impression-cylinders and to hold same in any predetermined position.

12. In a printing-press, a pair of sheetcarrying members, an interposed coacting transfer-mechanism and means for laterally shifting said transfer-mechanism during a predetermined portion of its rotationwith {)espect to the pair of sheet-carrying mem ers.

13. In a printing-press, a pair of sheetcarrying members, an interposed coacting transfer-cylinder and means for laterally shifting said transfer-cylinder a predetermined distance during a predetermined portion of its rotation with respect to the pair of sheet-carrying members.

14. In a printing-press, a pair of sheetcarrying members, an interposed coacting transfer-cylinder and means for transversely shifting said transfer-cylinder apredetermined distance during one part, and for restoring same to its original position during another part, of its rotation.

15. In a printing-press, a rotatable sheetcarrying cylinder, and means for reciproeating said cylinder transversely with re--' spect to the press during each revolution of said cylinder.

16. In a printing-press, a rotatable sheetcarrying cylinder, and means for shifting said cylinder transversely in both directions with respect to the press during each revolution of said cylinder.

17. In a printing-press, a rotatable sheetcarrylng cylinder and automatic means for transversely shifting said cylinder a pre-' carrying cylinder and means operable during each revolution. of said cylinder to shift the cylinder transversely to a predetermined position and to restore'said cylinder to its original position. I

19. In a Punting-press, a rotatable sheetcarrying cylinder, means fortransversely shifting said cylinder a predetermined dis-.

tance during a predetermined portion of its rotation, and means for returning said 1 cylinder to its original'transverse position during another predetermined portion of said rotation.

20. In a printing-press, a rotatable sheetcarrying cylinder, means for'shifting said cylinder to different transverse positions with respect to the press durin each revolution thereof while carrying an releasing the sheet.

21. In a..'m11lt1-C0l01f printing-press, a printing couple for printing a sheet in one color, means for thereafter laterally shifting the sheet less than its width with respect to said printing couple, and .separate means for thereafter printing another color on the sheet.

22. In a multi-color printing-press, a

printing couple for printing the first color on the sheet, means for thereafter shifting said sheet a predetermined distance less than its width laterally with respect to said printing couple, and separate means for thereafter printing another color on the sheet.

23. In a multicolor printing-press, a printing couple for printing a design on the sheet, means for laterally shifting the sheet less than its width after said printing with respect to its path of travel through the press, and separate means for thereafter printing another design on the sheet.

24. In a multicolor. printing-press, a printing couple for printing a design on a sheet of stock, means for holding the sheet while being so printed, means for transversely shifting said holding means and said sheet with respect to its path of travel, and separate means for thereafter printing another design on the sheet.

. CHARLES J. WRIGHT.

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