US225501A - wright - Google Patents

Description

. 2 8heetsSh et 1. G. M. WRIGHT. Chromatic-Printing Machine. No. 225,501. Pa t el 1ted Mar. 16, 1880.

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G. M. WRIGHT. Chromatic-Printing Machine. No. 225,501. Patented Mar. 16, 1880.

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UNITED STATES PATENT OFFICE.

GEORGE M. WRIGHT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO UNITED STATES LABEL, CARD, AND TAG COMPANY, (LIMITED) CH ROMATlC-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 225,501, dated March 16, 1880.

Application filed October 25, 1879.

To all whom it may concern:

Be it known that I, GEORGE M. WRIGHT, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Chromatic-Printing Presses, which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure 1 is a top or plan view of the press embodying my invention. Figs. 2 and 3 are side elevations thereof. Fig. 4 is a vertical section in line w m, Fig. 1.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A represents the frame of the press, and B uprights thereof, at the top of which is supported the stationary bed-plate (J.

D represents the platen, which is guided on the uprights B, and operates beneath the bedplate, which, with the platen, is arranged horizontally.

To the under side of the platen, at opposite places, are connected yokes E, within each of which slides a cross-head, F, and to said heads F is connected a double-crank shaft, Gr, whose bearings are on the sides and center on proper parts of the frame of the press, and it constitutes in a measure the main or driving shaft of the press.

From the under side of each end of the platen depends a stem, H, which enters and is guided in an opening in the base a of the press.

It will be seen that when power is communicated to the crank-shaft G sliding motions are imparted to the cross-heads F, and the yokes E are caused to rise and fall, thus advancing the platen to and from the form, which is suspended from the under side of the bedplate a by means of strips 11.

Owing to the doublecrank shaft G and stems H the platen is uniformly and steadily advanced at both sides, so that it is presented true to the form.

The paper or material is fed from a roll mounted on the bed-plate or other proper part of the frame-work, and moves on the upper face of the platen at a right angle to the motion of the inking-rollers J, which are mounted on bearings J, having sliding motions on the outer sides of the strips I). Connected to the bearings J are jointed arms K, the lower ends of which are fixed to a rock-shaft, L, mounted on the frame A, and receiving motion from an arm, M, which engages with a cam, M, on the crank-shaft G.

It is evident that the operation of the shaft L imparts reciprocating motion to the rollers J, which, receiving the colors from the inkingcylinder N, imparts them to the form.

The cylinder N is mounted on the upper portion of the frame A, and adjacent to and in contact with it is a cylinder, N, which is in contact with a cylinder, N, both mounted on the frame A. ()n the shaft of the cylinder N is a cam, 01, against which bears an arm, 0, of a rock-shaft, f, mounted on the frame A and supporting-arms f, 011 whose upper ends is supported a roller, P, which is alternately brought in contact with the cylinder N and the roller Q, of the fountain R.

The cylinders N N N rotate together by means of gear-wheels g, and power is communicated to one of the wheels by a band-wheel or pulley, h, operated from a suitable portion of the press, and the fountain-roller Q is intermittently rotated by means of a ratchet-andpawl mechanism, It, operated from one of the gear-wheels, g.

S represents rollers, which rest freely on the cylinders N N and have their ends guided on the upper portion of the frame A. One end of each roller has a neck, which enters an ear, m, hinged to a hinged bar, T, formed of two parts hinged together, and each having a pivotal connection with the frame-work A by means of suitable hangers n. A horizontal arm, U, is pivoted to the frame Aor bed-plate O, and has a slotted connection with the bar T, and receives swinging motion from a camwheel, 19, over the shaft of the cylinder N.

The fountain R, roller Q, and rollers S are spaced for the different colors, and each part of the bar T has connected to it, by means of the ears m, two rollers, S, so that when the press is in operation each cylinder N N has in contact with it one roller, S, moving to the right and one to the left.

It will be seen that by this system of rollers and cylinders the ink or color from the fountain is properly conveyed to said rollers and cylinders, and-uniformly spread on the rollers J, and thus evenly and properly distributed to the form.

Pivoted to the base a are two weighted levers, V, one for each stem H of the platen.

7, thus ease the operations of the press, it being the difi'erent colors.

noticed that the platen, with connected parts, is of a heavy portion of the press.

The paper or strip to be printed is drawn forward by an intermittent motion, whereby the paper'is carried'each time the distance of a division of the form, so that it is presented successively to each division, and thus receives This motion is obtained from rollers or disks 8, which are geared with a cylinder, 8, between which the strip is passed, and close in contact, the disks and cylinder being mounted on arms or extensions of the platen D. On the shat'tof the diskssis secured a ratchet, W, the pawl W being hung from the upper limb of an elbow-lever, X, which is mounted loosely on the shaft of the disks 8. The other limb of said lever X is slotted and connected by a pin or screw to the lower part of a telescopic piece, Y, which is secured to the bed-plate G by an arm, t. A spring, it, bears against the lower part of the piece Y. An ad justing-nut, t, is fitted to the upper part of said piece, and an upright screw, Z, is fitted to an arm on the platen, and so located as to strike the elbow-lever X. V

It will be seen that as the platen rises the lever X and pawl WV are moved inwardly, thus rotating the ratchet XV and disks 3 in the direction of the arrow, Fig. 2. This pulls or draws the paper the distance of one division of the form. As soon as the impression is to be made the screw Z strikes the lever X and stops or throws 011' the pawl W, the lower part of the telescopic piece Y yielding, owing to the pressure on said lever X. The disks 8 immediately become stationary, and the strip of paper or material is rendered immovable during the printing operation.

When the platen lowers, the lever X is disengaged from the screw Z and the pawl returns, ri din g freely over the teeth of the ratchet W, whereby the latter remains passive and the paper is not moved. of the platen the ratchet is again operated, the paper fed forward, and thus the work continues as long as desired or necessary.

As the feeding mechanism is located opposite to the place of entrance of the sheet to be printed, said sheet will be pulled,in contradistinction to pushed, and thus the sheet may be moved true and uniform and held taut, and thin material may be readily printed.

Having thus described my invention, what I claim new, and desire to secure by Letters Patent, is-- 1. In combination with the yokes E, the perforated base a and the platen D,provided with stems H, substantially as set forth.

2. In combination with the yokes E, the per forated base a, the platen D, provided with stems H, and the weighted levers V, substantially as set forth.

3. In combination with the feed-rollers, the I ratchet W, pawl WV, elbow-lever X, screw Z, and telescopic piece Y, substantiallyas and for the purpose set forth.

G. M. WRIGHT. Witnesses:

JOHN A. WIEDERsHEIM, A. P. GRANT.

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