US1396182A - Printing-press - Google Patents

Description

L. FRIEDMAN.

PRINTING PRESS.

APPLICATION FILED DEC. 29, 1920.

3 SHEETSSHEET 2.

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BY ATTORNEY.

L. FRIEDMAN.

PRINTING PRESS.

APPLICATION FILED 02c. 29, 1920.

1,396, 1 82, Patented Nov. 8, 1921.

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r- 1 7 s Z/ L INVEN TOR.

' ATTORNEY.

Louis FRIEDMAN,- or NEW YORK, N. Y.

PRINTING-PRESS.

Specification of Letters Patent.

Patented Nov. 8, 1921.

Application filed December 2.9.1920. Serial No. 433,778.

To all whom it may concern: 7

Be it known that I, Lo UIs FRIEDMAN, a citizen of the United States, residing at New York city, borou h of Manhattan, county and State of New ork, have invented a certain new and useful Printing-Press, of which the following is a specification.

This invention relates to printing presses and is adapted to be employed, more particularly, in printing presses. adapted to print a plurality of colors at the same time, the present invention beingmore especially useful in connection with ordinary job printing presses. The invention, from a more specific standpoint, is directed to improve ments in multi color printing presses of the character shown and described in my prior application Serial N 0. 410,630, filed September 16th, 1920, wherein color is applied to the form roller or rollers from a plurality of inking plates, each of which is adapted to carry ink of a particular color and the present invention is directed to the'mounting and operation of these inking plates in a simple and expeditious manner.

In its preferred practical embodiment, the present invention consists in providing a press with aplurality of plate supporting blocks, which are mounted for sliding movement on tlie'frame of the machine and each of which blocks is adapted to carr an inking plate. Inking plates are mounted for rotation on their respective blocks and mechanism is provided for imparting a step by step rotation to the plates for the purpose of bringing about an efiicientdistribution of ink over the surfaces thereof. The plate supporting blocks have, moreover, associated therewith, means whereby they may he slid or adjusted in the guides in which they are supported, so as to vary the relative position between the plates wlth great nicety.

eatures of the invention, other than those specified, will be apparent from the hereinafter detailed description and claims. when read in conjunction with the accompanying drawings The accompanying drawings illustrate one practical embodiment ofthe present invention butthe constructiontherein shown is to be understood as illustrative, only, and not as defining the limits of the invention. Figure 1 is a plan view of the rear portion a press embodying the present invention. 7 Fig. isavertical sectionon the .-ine"2 2- of which the Fig. is a side elevation of the mechanism shown in Fig. 1.

Fig. 4 is a section on the line 44 of F 1g. 1. V

Fig. 5 1s a section on the line 5-5 of Fig. 3. v

Fig. 6 IS a fragmental plan view of a portron of the mechanism shown in Fig. 1.

desig remaining parts of the press mechanism in a manner well known in the art that the form roller is caused to traverse the upper edges of the bars 10 and roll over the inking plate, which is usually in the form of a single rotatable plate. In some of the prior presses.

the form roller has been mounted so that rotation thereof is accompanied by longitudinal movement of the form roller, but in carrying out the present invention, the form roller 11 is so constituted and mounted that it will partake of rotary movement only and is adapted for no longitudinal reciprocation.

In adapting the present invention to a press of this character, a pair of guides 13 are secured in parallel relation. to the under sidesof the guide'bars 10 and in a position to extend transversely of the machine. The guides are spaced apart as clearly shown in Fig. 4 and between the guides are positioned a plurality of blocks 14, one of which is shown in detail in Fig. 8, so constructed as to embody channels 15 at their opposite sides. Through these channels, the guides 13 pass, whereby the blocks 14 are mounted for sliding movement longitudinally of the guides in a manner which will be manifest.

Each block 14 is provided at its center with a circular aperture 16, into which is adapted to extend a stem 17 of an inking plate 18, and on the underface of each inking plate 18 is mounted a fixed ratchet 19, by means plate may be periodically rotated in amanner hereinafter described.

Any number of slide blocks 14 may be mounted between the guides 13 and the uides may be curved instead of straight.v owever, in the accompanying drawings, four slide blocks are illustrated.

In ordinary job printing presses, a single plate is usually provided which is mounted for rotation in the yoke of the machine shown at in Figs. 1 and 4, and in adapting the present invention to such a press, the large plate is simply removed and one of the smaller plates associated with the yoke through the employment of a size reducing bushing20', after the manner, shown in Fig. 4c. This plate is, however, incapable of adjustment although mounted for rotation.

It is frequently desirable to adjust the inking plate .18 with reference to one another and great niceity of adjustment is made possible in the construction shown through the employment of adjusting screws 21 and 22. These adjusting screws are all mounted for rotation in lugs 23 formed on the side bars 10 of the press as shown in Fig. 3, but

' another.

accordance with imparted to provided withcollars to preclude their longitudinal movement. The screws 22 work in tapped holes 24; (see Fig. 8) in the slide blocks {nearest the sides of the machine, while the screws 21 pass through smooth holes in said slide blocks and thread into the nearest slide blocks or those adjacent the yoke 20. The Outer end of all the screws are secured, thereby adapting them to receive a hand wrench 25, whereby the screws may be rotated for the purpose of sliding the blocksglongitudina-lly of the guides 13 to adjust the ink plates 18 relative to one A very nice adjustment of the ink plates may be had by this construction and such adjustment is important when printin directly adjacent portions of a form in di erent colors.

In practice,-I have found it convenient to provide inking plates of different diameters which may be removably positioned on surh Side blocks as will permit of their proper positioning and these plates are chosen in he particular job to be done. Three plates of the same size are shown as mounted in position, although two or five might be readily employed in the construction shown. 7

It is desirable that the inking plates be rotated so that proper distribution of the ink may be had, and in the accompanying drawings, mechanism is shown wherein ,-adjustment of the plates may be. had without effecting theoperat've relation between the plates and the mechanism employed for rotating them. This plate rotating mechanism cooperates directly withthe fixed ratchets 19 of the respective plates and movement is such ratchets by meansof a movable ratchet rack 26. The ratchet rack 26 is'in the form of a long strip of metal any suitable manner.

provided at one of its edges with ratchet teeth and .mounted for sliding movement transversely of the machine. The fixed plate 7 extends transversely between the side in Figs. 1 and 7 and bars 10 as shown best this plate is provided with slots. 28 through which extend studs 29 secured to the rear edge of the rack 26 as shown best in Figs. 1 and at. Springs 30 are coiled about the studs between the plate 27 and ratchet rack 26 and serve to force the-ratchet rack into engagement with the fixed ratchets 19 of the ink plates. One of the center of the machine, projects forwardly farther than the others and has secured thereto one end of a spring 31, the other end of which is secured at 32 to the plate 27 as shown in Fig. 1. Also secured to the center stud 29 is one end of a cable 33, which cable passes over a directional pulley 3 1 and is secured at its opposite'end to a lever 35. The distant end of the lever carries a roller 36, which lies in the path of the arms 12 which carry the form rollers.

During the operation'of the machine, and in about the time the form rollers havefcompletedtheir travel over the form in a forward direction, the arms 12 engage with the studs 29, shown at the rollers 36 thereby tilting the levers 35,

the ratchet rack, it ridesidly over the fixed ratchcts 19 and is permitted to do so by the flexing of the springs 30. As soon, however, as the form roller. commences its return movement, the arms 12 move in a retrograde direction, thereby permitting the levers 35 to assume theirioriginal position while the spring 31'slides the ratchet rack 26 back to the point of beginning. :During this last mentioned sliding movement of the ratchet rack, the teeth. thereof. operatively engage with the teeth of the fixedratchet'19 on the ink plates and impart rotation to the plates. vAs the machine continues to operate, the ratchet. rack '26 reciprocates back and forth and imparts stepby step rotation to the respective ink plates'irrespective of their'positions of adjustment. An important feature'of the construction described resides in the fact that the ink plates may be adjusted without requiring any adjustment of: their rotating mechanism, which functions, at all times in a sure and eflicient manner.

, In commercially employing theinvention, the several ink plates are adapted for the reception of ink of a plurality, of colors, which ink may be applied to such plates in For example, the ink may be supplied from the fountain, mounted on aplate 37 supported on the side bars 10, although any" other arrangement for supplying ink may be employed.

each provided with tion, what I claim In the foregoing 13 are described as extending transversely of the machine and substantially perpendicular to the side bars 10. However, if desired, such guides may be positioned obliquely of the direction of travel of the form roller so that the blocks 14 .are adjustable in an oblique direction. Moreover, while only one set of guides and blocks are shown in the drawing, the construction specified may be duplicated without departing from the spirit and scope of this invention.

Having thus fully described the invenas new and desire to secure by Letters Patent is:

' 1. A printing press embodying a plurality of ink plates, each of which is adapted to contam ink of a predetermined color and each of which is further provided with a depending stem, a plurality of slide blocks,

a socket adapted to receive the stems of the ink plates, means for mounting the slide blocks for sliding movement for the purpose of adjusting the plates relative to one another, a plurality of screws mounted for rotation in the frame of the press, but fixed against longitudinal move- -ment, each of which screws threads into one the sliding blocks, whereby rotation of the screws effects the adjustmentbetween the plates, a fixed ratchet associated with each plate, a ratchet rack common to all of the plates, means for sliding the ratchet rack in one direction to eflect simultaneous rotation of all of the plates, means for 1mparting idle sliding movement to the rack in the opposite direction, and means for yieldably holding the rack in engagement with the fixed ratchets on the plates.

2. A printing press embodying a plurality of ink plates, a ratchet fixed w1th respect to each plate and assoclated therewith, a plurality of movable members, one of which serves as a support for each plate and on which the plates are rotatably mounted,

, guiding means on which the movable members are mounted for sliding movement, screws mounted for rotation in the frame of the press, but fixed against longitudinal movement, each of which screws threads into one of the movable members, whereby the rotation of the screws efi'ects sliding movement of the movable members to adjust the plates relative to one another, and common means cooperating with the ratchets of all the plates for imparting step by step rotation thereto.

3. A printing press embodying a plih rality of ink plates, a plurality of movable members, each rotatably carrying one of the description, the guides.

plates, and mechanical means for slidably moving the movable members relative to one another to effect accurate adjustment between the plates, said means serving to hold the movable members against inadvertent movement.

4. A printing press embodying a plurality of printing plates, mounted for rotation, a ratchet wheel associated with each plate, a common ratchet rack cooperating with all of the plate ratchets, means for moving the rack longitudinally in one direction to effect simultaneous rotation of all the plates, means for reciprocating the rack in the opposite direction on an idle stroke, and means for yieldably holding the rack in engagement with the plate ratchets.

5. A printing plress embodying a plurality of ink plates mounted for rotation, a ratchet associated with each plate for ro tating the same, a reciprocating ratchet rack common to the ratchets of all the plates for simultaneously operating said ratchets to impart rotation to the plates, and means for bodily impelling the rack with yielding pressure against the ratchets of the several ink plates.

6. A printing press embodying a plurality of ink plates, a supporting member for each plate and on which supporting member the plates are mounted for rotation, means for mounting the supporting members for sliding movement toward and away from one another for the purpose of eflectlng adjustment between the plates, and adjusting screws having threaded engagement with the supporting members and secured against longitudinal movement to effect adjustment of the supporting members individually when the screws are operated.

printing press embodying a plurality of inking plates, a supporting member for each plate and on which supporting members the plates are mounted for rotation, means for mounting the supporting members for sliding movement toward and away from one another for the purpose of effecting adjustment between the plates, means common to all of the plates for simultaneously imparting rotation thereto, and adjusting means associated with each supporting member for normally holding it against inadvertent movement, and adapted, when operated, to positively effect sliding adjustment of its associated supporting member.

In testimony whereof, I have signed my name to this specification.

LOUIS FRIEDMAN.

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