US1288536A - Multicolor attachment for printing-presses. - Google Patents

Description

C. W. DYER.

MULTTCOLOR ATTACHMENT FOR PRINTING PRESSES.

APPLICATION FILED DEC-20.1915.

1,288,536. Patented Dec. 24, 1918.

2 SHEETSSHEET I.

mm: runs ca mnmuma. uusumunm u r C. W. DYER.

MULTICOLOR ATTACHMENT FOR PRINTING PRESSES.

APPLICATION FlLED DEC- 20. I915.

1,288,536. V Patented Dec. 24, 1918.

2 SHEETS-SHEET 2.

CAD

CHARLES VI. DYER, 035 ST. LQUIS, MISSOURI.

MULTIGOLOE ATTACHMENT FOR PRINTING-PRESSES.

messes.

Application filed December 20, 1915.

T 0 all who-m 2'25 may concern Be it known that 1, CHARLES W. DYER, a citizen of the United States. and resident of St. Louis, Missouri, have invented certain new and useful ln'iprovcments in Multicolor Attachments for Printing-Presses, of which the following is a specification containing a full. clear, and exact description, reference being had to the arcompanying drawings, forming a part thereof. I

My invention relates to improvements in inulti-rolor attaclnnents for printing presses,

wherein astencil plate is GDIPlOYQLl bGUVQGII the ink rollers and ink disk on presses of the Gordon type, and whose attachment to the press may be effected without alterations of the press.

The object of my improvements is to construct a stencil plate with means for attaching it to a press without altering the press. which plate will expose certain selected areas of the ink disk to the ink rollers in order that the rollers may ink selected areas of the form in different colors.

A further object of this invention is to provide a simple inexpensive and efficient means for the printing in two or more colors of ink on a platen press, connnonly known as being of the Gordon type, in conjunction with the revolving ink disk and composition distributing rollers without altering their present forms and functions.

A further object of this invention is to make possible an ink distribution equal to the normal capacity of the press and to also prevent mixing or mingling of the colors in any way that might lessen their original state. although using all usual equipment for ink distribution.

With the above objects in view my invention consists in certain novel details of constru. ion and arrangen'ient of parts hereinafter fully, clearly and conciselyset forth, pointed out in my claims, and illustrated by the accompanying drawings in which,

Figure 1 shows in elevation, a press of the Gordon type having the device of my invention in place thereon;

Fig. 2 shows in diagram the fountain, the ink disk and stencil plate, the roller, a form locked in a chase. and a sheet of printed in atter, broken lines indicating the division of colors;

Fig. 3 is a transverse sectional elevation of my stencil plate and its supports;

Specification of Letters Patent.

Patented Dec. 24, 1918.

Serial No. 67,781.

Fig. 4 is an enlarged detail, partly in section, of one of the stencil plate supports;

Fig. 5 is an enlarged detail sectional plan taken through one of the stencil plate sup ports, and

Fig. 6 is an enlarged detail transverse sectional elevation showing one of the fountain dividing means.

Referring by numerals to the accompanying drawings, 7 indicates the frame of a press of the Gordon type in which is mounted the belt pulley 8 whose shaft 9 carries a gear wheel 10 meshing with a second gear wheel 11 connected with and for the operation of the feed table 12, and which gear wheel 11 has connected therewith a pitman 13 connected with a pawl and ratchet mechanism 14; of the rotation of the ink disk 15, as well as for the movement of the ink rollers 16.

All the parts just recited in their specific constructions are common, and form no part of my invention except as combined with the device of my invention, and it is to be understood in this connection that the parts just designated may vary and that the device of my invention may be applied to other types of presses.

Extending rearwardly from the machine frame, and beneath the ink disk 15 is a support 1? for the fountain 18 which like the other parts of the press is of common construction except for the partitions 19 which will be hereinafter more fully explained.

The numeral 20 designates a stencil plate preferably constructed of sheet metal having at its margin a downturned flange 21, to facilitate the positioning of the plate over the ink disk as well as to stiffen or lend rigidity to the body of the plate.

Extending from the flange 21 at diametrically opposite points and preferably integral continuities thereof, are the stems or posts 22.

Secured to the frame of the machine at points beneath the ink roller, are the oppositely positioned brackets 23, having at their lowermost ends each, a foot 24 perforated to receive a cap screw 25 which cap screw enters athreaded seat in the machine frame.

As shown in Fig. 5 the uppermost portion of each bracket is provided with an open. topped channel 26 arranged to receive the stems or posts of the stencil plate. Each of these channels 26 as shown in Fig. 4: has at its lowermost end a socket 27 in which there is arranged an extensile coil spring 28 providing vertically yielding supports for the stencil plate whereby to normally hold the sten cil plate in a plane removed from the ink disk to obviate wear of the plate and disk, incident to the rotation of the disk which rotation is required for ink distribution.

In this connection however, it is to be understood that when the ink rollers 16 are moved over the ink disk, the stencil. plate yields downwardly so that the ink rollers may be brought into engagement with the ink disk to receive ink therefrom.

While I have shown the ink disk con structed as an integral unit, I do not wish to be understood as limiting myself to such a disk as Gordon and other job presses are common which have multi-section ink disks to facilitate distribution.

is heretofore stated the ink fountain is of ordinary construction, however, to make clear the use of my improved partition or dam, it will be observed that the fountain comprises a feed roll 29, a gate 30 and one or more set screws 31.

The partition or dam consists of an integral unit whose one, the lowermost, edge, is shaped to snugly fit the gate and the roller and is held in place by gravity only, and it is obvious that the partition may be readily placed where desired in the fountain to divide the fountain for receiving different colored inks.

In the diagram Fig. 2, there are shown four broken lines A. B. C. and 1)., indicating different fields.

Assuming it be desired to print at a single impression matter of multi-colors, the partitions 19 are spaced according to the fields ot color desired on the finished printed ma terial and a stencil plate is selected wherein the openings will correspond to the division of the fountain. In this diagram I have for purposes of illustration, selected an ordinary three color job in imitation of a type written letter wherein the field between the lines A and B represents the letter head, which for example will be printed in black so that the first partition or dam 19 will be placed at a point dividing the fountain'into a compartment of the width desired so that it will feed ink to only a portion of the disk exposed by the opening in the stencil plate lying between such lines so that only the portion of the ink roll between such lines will receive ink and carry it to such portion of the form lying between the lines A and B to the end that only the letter-head will receive the black ink. In this manner and in the order shown, the body of the letter lying between the lines B and C will be printed in a color distinguishable from the letter-head, and the space lying between the lines C and D will. be of a color distinguishable from the letter-head and body.

This attachment, involving no alteration or change in construction of the Gordon style of platen presses now in operation, has for its advantages facilities for the production of any work now possible to secure on any particular size of platen press, with the addition, by use of the stencil attachment, the production of work in two or more colors at one operation.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent of the United States therefor is 1. A stencil plate for printing presses comprising a substantially circular body portion constructed of relatively inflexible material and peripherally flanged to prevent flexing in use, means for yieldingly supporting the stencil in position over an ink disk, and said disk having openings therethrough arranged in distinct sectors of the disk.

2. In a printing press, the combination withan ink disk, of an ink roller, a stencil plate for preventing contact between said roller and disk except at determined points, said stencil plate being provided with a downwardly extending flange of rigid ma teri'al, and means carried by said flange for supporting said stencil plate.

In a printing press, the combination with an ink disk, of an ink roller, a stencil plate of rigid material for preventing con tact between said roller and disk except at determined points, said stencil being providcd with an integral downwardly extending flange, and means carried by said flange for supporting said plate.

In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses.

CHAR-LES WV. DYER. lVitnesses:

R. G. Onwrc, A. C. KILNETZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner pat t Washington, D. (3.

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