US225951A - Chromatic-printing machine - Google Patents

Description

J, H 2Sheets-Shet 1. I Chromatic-Printing Machine. No; 225951 Patented Mar. 30,1880.

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N-PETEM, PflDTD-UTHOGRAPMER. WASHINGTON, D. Q

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JOHN H. SHIFFER, OF CHICAGO, ILLINOIS.

CHROMATIC -PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 225,951, dated March 30, 1880.

Application filed December 12, 1879.

To all whom it may concern Be it known that I, JOHN H. SHIFFER, of Chicago, in the county of (look and State of Illinois, haveinvented new and useful Improvements in OhromatiePrinting Presses; and I hereby declare the following to be a full, clear, and exact description thereof, which will enable others skilled in the art to which my invention appertains to make and use the same, reference being had to the accompanying drawings, forming a part hereof, and in which Figure 1 represents a plan view of a chr0- matic-printin g press embodying my invention; Fig. 2, a side elevation of the same with the chase in position to receive the colors from the inking-rollers after it has passed under the impression-cylinder, and Fig. 3 represents the same locked in position to receive the impression from the cylinder. Fig. at represents a front elevation of Fig. 2 with part of the frame removed, showing the machinery for operating the inking-rollers, and. Fig. 5 represents a modification of the device shown in Fig. 4.

Like letters of reference indicate like parts.

My invention relates to that class of printingpresses by which two or more colors are printed at one and the same impression upon a sheet of paper placed upon either a stationary or movable platen; and it consists in a movable chase operated in connection with the inking-rollers, so as to impart to the form held in the chase lines or sections of colors in any desired and varied direction across the face thereof prior to the impression'being taken, substantially as hereinafter described.

In chromatic printing of the nature herein described the chase was heretofore locked or fastened upon the bed-plate at the angle that the desired lines or hands of colors were to run across the sheet of paper, which necessarily had to be fed square to the cylinder and large enough to cover the form, which would in such cases leave four blank triangles to be trimmed from the sheet, and hence cause a great waste of paper, greatest when the form is placed at an angle of forty-five degrees to the sides of the bed-plate or paper printed upon, being then equal to one-half the whole sheet printed, and would diminish as the sides of the formbecame more nearly parallel with the sides of the bed-plate or paper.

By means of the movable chase, as hereinafter described, I am enabled to save both the labor of trimming the paper and waste of stock.

In the drawings, A represents the frame of a cylinder printing-press, upon which moves the bed plate B in the usual manner, and upon which isplaced a chase, O, hinged to the v removable side piece, D, which has an arm or head-piece, E, attached to it and extending across the bed-plate B, and held thereto by clamps t t t, or otherwise. The head-piece E may also be a separate piece. 6 5

The side piece, D, and head-piece E may be so constructed as to form a part of the bed-plate B, or they may be constructed separately and so as to be readily attached to any printingpress.

F is an arm firmly attached to the bed-plate B, upon which is pivoted at j the toggle-joint brace G H, to one portion of which is attached a lever-arm, I, at right angles thereto.

To the lever-arm I is attached a pin, 9, long 7 5 enough to reach to, or nearly to, the surface of the plate J, which is provided with stops it and b, so arranged as to arrest the motion of the pin 9 at the desired points, and so open or close the toggle-joint brace Gr H, and thereby move the chase O alternately into the positions shown in Figs. 1 and 3.

The plate J is attached to the frame A, and is provided at its front end with a fixed stop,

a, and at its opposite end with an adjustable stop, I), moving in a slot, (7, and fastened by a set-screw, c.

To the sides of the frame'A are attached pla M, which carry the journal-boxes for the king-rollers L K L, of which K has 0 fixed journals but those of L and L are movable in such manner as to keep the rollers L and L in constant and uniformly-pressing contact with the roller K while they are being raised and lowered for the purpose of 5 either passing or inking the form. The mechanism employed for this purpose is more particularly represented in Fig. 4, in which the vibrating lever B receives motion from the shaft Q, working upon the pivot 00, through the connecting-strap w. The outer end of the vibrating lever B is loosely connected to the lower end of the lifting-bar n, Fig. 2, at the upper end of which are two links, m m, which connect with the curved carriers k k, and to the upper end of carriers k are firmly attached the journal-boxes of rollers L and L. The carriers k are curved and fitted within correspondingly-curved sockets ll, of such a curvature as to carry the rollers L and L with a constant and uniform pressure against the roller K.

The mechanism for lifting the rollers L and L is the same on both sides of the printingpress from the lower end of the lifting-bar 12, except that the lower end of the lifting-bar n, on the side opposite to the one previously described, is connected by means of a pin directly to a loose collar 011 the axle Q, and is alternately lifted and lowered by the vibrating motion of the axle Q, on the pivot 00, thus alternately lifting and lowering the rollers L L. The spring It raises the lifting-bar a when the strap to is made of flexible material, as the shaft Q cannot then depress the lever R.

In Fig. 5 another method of keeping the inking-rollers in uniform contact with the roll er K is shown, by which the journals of the rollers L and L are attached to loose collars on the axle of the roller K by radial connecting bars 2, and the braces or links on m are directly pivoted to the journal-boxes of L and L.

To the lower end of the lifting-bar a is attached a pin or roller, which works in a slot, 21, in the inclined piece 12 of the bar T, which has uprights V at each end thereof, and so placed as to receive from the bed-plate B the necessary motion, and thus lift the bar at or lower the same alternately, and thereby the inking rollers L and L. The rollers L and L are raised to the position of L and L when the chase passes forward under the impressioncylinder S.

The method of operating my improved chromatic attachment to printing-presses is as follows: The chase O, with its operating parts, is attached to the bed-plate B of the printingpress at the desired angle to the course of the bed-plate, as shown in Fig. 1, where the bedplate is at the end of its outward stroke, and from which it is to pass forward under the inking-rollers L K L, to receive the impressions of the difierent colors 0 p q from the said inking-rollers. After the chase has passed beyond the inking-rollers the pin 9 of the lever-arm 1 is arrested by the stop a, by which the joint f of the toggle-jointed brace G H is thrown forward to the center of the arm F, and thereby the apparatus is placed in the position shown in Fig. 3. The toggle-jointed brace G H is so arranged that the central joint, f, is thrown slightly beyond the line of the joints j 7; and held in such position by the toe r of the part G. When said toggle-joint brace is in the position last described the beveled edge e of the chase O is driven under the beveled edge e of the head-piece E, and with the hinge at s is firmly locked in position,

and so passed under the cylinder S to receive the impression.

When it is desired to printithe bands of colors ata less angle than that shown in the drawings, the stop I) is moved farther back in theslot (l of the plate J.

When the bed-plate is moving back, after the chase is inked and locked into position, as shown in Fig. 3, the inking-rollers L and L are caused to rise beyond the form by the automatic mechanism hereinbefore described, and the impression is then given by the cylinder S, after which the chase O is turned into its original position.

On a printing-press with stationary bedplate the chase is provided with a fixed arm connected with the mechanism for automatically turning the same upon the bed-plate, and to which the chase may be either cen trally pivoted or caused to turn within a ring or frame.

The plate J may be jointed with a hinge at i, so that it may be dropped down and out of the way when not in use.

Motion is communicated to the press by means of a belt on the pulley P on the shaft g, at the other end of which is a-pinion, N, engaging with the rack O, suspended from the platen by hangers-y 3 Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination, with the bed-plate of a printing-press, of the vibrating chase 0, sub stantially as and for the purpose specified.

2. The combination, with the bed-plate B of a printing-press, of the hinged and vibrating chase 0, side piece, D, and beveled head-piece E, substantially as shown and described.

3. The combination, with the bed-plate B of a printing-press, of the hinged chase 0, arm F, toggle-joint brace G H I, provided with pin g, plate J, provided with stops (0 and 1), side piece, D, and head-piece E, substantially as and for the purpose specified.

at. The combination, with the bed-plate B of a printing-press, of the vibrating chase O, inking-rollers L and L, and mechanism for raising and lowering said rollers, substantially as and for the purpose specified.

JOHN H. SHIFFER.

Witnesses WILLIAM ZIMMERMAN, N. CowLns.

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