US312769A - scott - Google Patents

Description

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Patented Peb. 24, 1885..

(No Modem W. SCOTT. GHROMATI PRINTING MACHINE.

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(No Model.) 2 sheets-sheet. 2. W. SCOTT.

CHROMATIG PRINTING'MAGHINE.

No. 312,769. Patented Peb. 24.1385.

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PATENT fl cHRoMATlc-PRINTING MACHINE.

SPECIFICATIQN forming part of Letters Patent No. 312,769, dated February 24, 1885.

Application lcd December 28, 1883.

To @ZZ whom, it 77th/,y concern;

Be it known that I, WALTER SCOTT, of Plainfield, in the county of Union and State of New Jersey, have invented an Improvement in Ghromatic Printing Machines, of which the following is a specification.

My press is adapted to printing two or more colors upon one sheet, or to printing two or more separateimpressions each rotation of the printing-cylinder, and to wetting the printing-surface before the inking operation, as in lithographie or zincographic printing.

In the drawings, Figure l is a vertical section yof the operative parts of the press. Fig. 2 illustrates the gearing that may be made use of in giving motion to the parts. Fig. 3 is a partial plan View indicating the positions in which the respective parts may stand in rela-` tion to the form-cylinder and frame.

rIhe form-cylinder A is continuously revolved, and it may have two, three, ormore printing 'surfaces or forms. I have shown three forms, a b c. These may be types, stereotypes, zinc plates, or lithographie stones, or any other form of printing-surface.

B is the impression-cylinder, of ordinary character, and it isof a size to revolve once for each printing-surface, and D is a second or delivery cylinder. If a web of paper is printed from, it `may be supplied to this cylinder B or delivered in any suitable manner but my press is specially adapt-ed to use with sheets fed by hand from the feed-board (Z to the grippers e, the sheets being taken away and laid upon the table E. If two or more impressions are made upon each sheet, the grippers c willretain the sheet during the two or three revolutions of the impression-cylinder, and when the sheet opened by any suitable automatic means at the time the grippers f of the delivery-eylinderD are closed upon the advancing end of such sheet, whereby the sheet will be taken off the impression-cylinder B, and the grippers e will take a fresh sheet from the feed-board while the printed sheet is being carried to the delivery-apparatus, hereinafter described.

For lithographie or zincographic printing,

I make use of a water-trough, H, with atrain of rollers, h h2 h3 h4 h5, of absorbent material, to wet the printingsurfaces that pass beneath l (No model.)

them. With stereotypes' or types these wetting-rollers will not be needed.

I provide as many ink-troughs as thereare separate colors or inks to be used. I have shown three ink-troughs, L N O. The inking-rollers Z receive theirink from the rollers Z2 Z3 Z*, duetor Z, and fountain-roller Z6. The other inking-rollers and intermediate rollers are ingroups similarly arranged, one group for each ink-trough. Each group of rollersis in its end frames, the rollers Z Z2 Z3 Z* being in the frames Zio o2 o3 o* in the frames o8, and n. n2, n3, and n* in the frames of. Said frames Z8 nsoS are guided in slides or supports on the inner surfaces of the frames F, and provided with arms Z", ng, and o, respectively, that extend radially toward the shaft A of the-form-cylinder, and are provided with rollers, against which the cams Z, nl, and 01" on the shaft A act, respectively, so as to press the frames and rollers away from the printing-surfaces except when the proper surface to receive the given color is passing beneath the inking-rollers. If the printing-surface a is to give a blue impression, there will be blue ink in the inktrough L, and the c'aln Z will allow the roll, ers Z Z' Z to run in contact with the surface a and lift the rollers Z out of contact with the surfaces b and c as they pass. So, likewise, the surface b will be inked with the black or colored ink from the trough N and rollers at', and said rollers n will be moved out of con! tact with the surfaces a and c by the cam nl".

The surface c will be inked by the rollers 0,

and such rollers will be moved out of contact with the surfaces c and b by the cani'o. In all instances springs are to be used to press the frames and rollers toward the surfaces to be inked, or vice versa; or cams may be used without springs. It will now be understood that the impressioncylinder can receive one sheet each revolution, and that one sheet will be printed on the surface a, the next on the surface b, and thethird on the surface c; or else the sheet may be retained by the grippers e and receive three impressions-one from each surface a b c-in succession. In color-printing this will be a great convenience, as the register, when once adjusted, must always be perfect.

In order to take the sheet when printed, I

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make use of the ily-frame R, composed of two arms upon the rock-shaft r, such arms being far enough apart to allow the sheet to swing between them as held by the grippers s s.

Upon reference to Fig. 2 it will be seen that the middle inking-roller vand the two adjacent rollers of each group are geared together, as

at 13 14 15, so that all the rollers in each group will be revolved either by the gearing or by surfaeecontact, and I apply a gear-wheel, 16, upon the edge of the formcylinder or upon its shaft and the intermediate gears, 17, that give motion to the gears 13, and these gears are placed, as shown, so that the movement of the frames and groups of rollers toward and from the printing-surfaces will not in any manner separate the gear-teeth; hence the inkingrollers will continue to revolve, and will be in motion in the proper direction when brought into contact with the printing-surfaces, and the inking will be perfect instead of injured, as it would be if the inking-rollers were at rest when brought into Contact with the moving printingsurfaces.

The ily-frame and grippers for conveying away the printed sheet form the subject of a separate application filed December 28, 1883,

portions of the form-cylinder without the ro` tation of the inking-rollers being stopped, substantially as set forth.

Signed by me this 20th day of December, A. D. 1883.

WALTER soorr.

Vitnesses:

GEO. T. PINCKNEY, WILLIAM G. Morr.

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