US141315A - Improvement in rotary printing-presses - Google Patents

Description

3Sheets--Sheet1 W. BRAIDWDOD 8:. H. J. HEWITT Rotary Printing-Presses.

Patented July 29,1873.

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Rotary Printing-Presses.

N0. I4I,3I5 Patentedjuly 29,1873.

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No; 141 315 PatentedJu! y29,1873.

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UNITED STATES PATENT OEEIoE.

WILLIAM BRAIDWOOD AND HORATIO J. HEWITT, OF NEW YORK, N. Y.

IMPROVEMENT IN ROTARY PRINTING-PRESSES.

Specification forming part of Letters Patent No. 141,315 dated July 29, 1873; application filed June 8, 1871.

To all whom it may concern:

Be it known that we, WILLIAM BRAIDWOOD and HORATIO J. HEWITT, both of the city, county, and State of New York, have invented a new and useful Improvement in Printing-Presses; and we do hereby declare the following to be a full,'clear,- and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification, in which draw- Figure 1 represents a side view of our invention. Fig. 2 is a longitudinal vertical section of the same. Fig. 3 is a detached longitudinal section of one of the type-cylinders. Fig. 4 is a face view of the same. Fig. 5 is a transverse section of the same in the plane 00 ac, Fig. 4. Fig. 6 is a longitudinal section of the impression-cylinder. Fig. 7 is a side view of the feed-roller.

Similar letters indicate corresponding parts.

Our invention relates to certain improvements in printin'gpresses; and consists in constructing the type-cylinder with ring furniture and pressure slides for the purpose of facilitating the operation of adjusting and securing the forms in position. The impressioncylinder,is provided with a recess to receive a clamping-strip for the purpose of retaining the tympan-sheet. With the type-cylinder and impression-cylinder of each' set is combined a strippingroller to insure the separation of the sheet of paper or other material from the type-cylinder after the impression has been taken. The invention further consists of a combination of parts, as will hereinafter appear.

In the drawing, the letter A designates a frame, which forms the bearings for several sets of cylinders, each set consisting mainly of an ink-cylinder, B, a type-cylinder, O, and an impression cylinder, D. In the drawing, we have shown two sets of cylinders, B O D B G D; but the number of sets may be still further increased, according to the nature of the work to be produced, as will be hereafter more fully explained. The ink-cylinders B B p are supplied with ink from ink fountains in the usual manner, and the ink thus taken up by the ink-cylinders is transferred to the typecylinders O C by double sets of distributingrollers, a I) 0 d, a If 0* 61*, a I) c d, W b* c* 61. (See Fig. 2.) The rollers a a? a w are the distributing-rollers generally employed in printin g-presses of similar construction; but with these rollers we have combined the additional rollers b 0 d 11* 0* 61*, and so forth, whereby a more perfect and uniform distribution of the ink is insured and a double amount of rolling given to the form. The type-cylinders are constructed with end flanges e f, (see Figs. 3, 4, and 5,) one or both of which are undercut or V-shaped. In the surface of each cylinder are four, more or less, guide-grooves, g, to receive slides h, the outer ends'of which are bent inward in a radial direction to form lugs i, which form the bearings for screws j. These screws turn loosely in the lugs z, but they are provided each with a head and collar to embrace the lug and compel the slide to follow the longitudinal motion of its screw in either direction. The screws j are tapped into the body of the cylinder, and by turning said screws the slides h are moved in or out, according to the direction in which the screws are turned, On the cylinder are fitted segmental ring furnitures k lm of different construction. The segments 70 are provided with set-screws n, by means of which they can be firmly connected to the slides h. The segments 1 m are placed loosely on the cylindtr. They are made to break joints, and they are connected by tongueso and grooves 1), (see Fig. 3,) so that they are enabled to retain their position on the cylinder. The outer edges of said segments 1 and m are undercut or V-shaped, (see Fig. 3,) as are also the inner edges of the segments k. The forms E are fastened to wooden or other segments F, which fit the periphery of the cylinder, and the edges of which are V-shaped to correspond to the edges of the segmental furniture-rings k, l, and m. If one of the forms with its supporting-plate is placed between the furniture-rim g m and the flange f, and another between the furniture-rings k and Z, and if the segments 70 arefastened to their slides, the'wooden or other segments of the forms E can be firmly clamped between the furniture-rings 7c 1 and the ring m and flange f, respectively, simply by screwing up the screws j of the slides h, and the forms can thus be readily adjusted on the type-cylcylinder in either direction, until they arrive in the correct position, which is essential, particularly in printing different colors.

Furthermore, by this arrangement we are enabled to put forms all round the typecylinders, so as to enable us to print continuously during the operation of the machine.

The impressioncylinders D D are constructed with endless flanges or bearers, bean ing against the flanges or bearers of the typecylinders, so as to produce metallic contact. Between its end flanges each impression-cylinder is provided with a recess, q, to receive a clamping-strip, r, which serves to retain the inner end of the tympan-sheet s. This tympan-sheet is then wound round its cylinder a number of times, and its outer end is secured to the coil by means of glue or other suitable cement, and by these means a continuous im pression-surface is produced all the way round.

The paper or other material on which the impressions are to be produced may be introduced in sheets; but we prefer to print from a roll, G, which is mounted in the frame A. (-See Figs. 1 and 2.)

\Vith each of the type-cylinders is combined a stripping-roller, H or H. The paper adheres more or less to the type-cylinders, and by applying the stripping-roller the paper is gradually separated or peeled off from the typecylinder as the paper or other material is drawn through the machine with the requisite speed by a drawing or feed roller, I, which bears against the last impression cylinder, and which is made in sections, as shown in Fig. 7, each section being secured on the shaft by a set-screw, so that it can be shifted and brought to bear on such parts of the paper which contain no impression. By the action of this feed-roller the paper or other material is prevented from lagging behind while being acted on by the impression-cylinders.

The stripping-rollers H H are shown as bein g closely arranged to the type-cylinders; but in practice we intend that they shall set oil a short distance from the same.

The impression-cylinders D D are geared together by cog-wheels t t a, (see Fig. 1,) so that they revolve at the same speed, and the several cylinders B G D B 0 D are also geared together, as shown in said figure.

The sheet of paper or other material on passin g through between the cylinders O D receives an impression, and as it passes between the cylinders C D a second impression is pro duced on the same part of the paper which received the first impression, the first impression being perhaps in black, and the second in red or any other color.

In order to bring the two impressionsin the proper relation to each other it is absolutely necessary that the forms-or types on the two cylinders O 0 shall register with perfect accuracy, and by the peculiar construction of our type-cylinder we are enabled to effect this purpose without difficulty.

Furthermore, in producing the various impressions, each on its own distinct impression- I cylinder, we are enabled to overlay each design without difiiculty; whereas, if the several impressions are taken on one and the same cylinder, the operation of overlaying is exceedingly difficult, if not entirely impracticable, because the overlay for one form interferes with the proper shading of the subsequent form; since, where in the first form a heavy impression is required, in the second form perhaps a light impression is desirable, and if the overlay for both forms are on one and the same ilnpression-cylinder, they are liable to produce a wrong effect on that form for which they are not intended.

Our machine enables us to print several colors in succession at one operation of the press, the paper or other material being fed automatically through the press, while each color is printed entirely independent of the other, so that the proper shading of each design can be easily effected, and by adjusting the forms or types on their respective cylinders the various designs or colors can be made to register with ease and facility.

What I claim as new, and desire to secure by Letters Patent, is

1. The furniture-rings k l m, slides h, and clamping-screws j, in combination with the forms and with the type-cylinder U, substantially as set forth.

2. The clamping-strips r, in combination with the tympansheet 8 of an impression-cylinder, D, substantially as described.

3. The stripping-rollers H H, in combination with the type-cylinders O (3, impressioncylinders D D, and feed-roller I, substantially as set forth.

4. The feed-roller I positively geared with and in combination with the last impressioncylinder, substantially as and for the purpose set forth. 7 1

WM. BRAIDWOOD. HORATIO J. HEWITT. Witnesses W. HAUFF,

E. F. KASTENHUBER.

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