US3345941A

US3345941A - Adjustable vibrating roller in the inking mechanism of a printing machine

Info

Publication number: US3345941A
Application number: US430051A
Authority: US
Inventors: Koch Werner; Preuss Friedrich
Original assignee: ROLAND OFFSELMASCHINENFABRIK F
Current assignee: ROLAND OFFSELMASCHINENFABRIK F; Roland Offselmaschinenfabrik Faber & Schleicher AG
Priority date: 1964-02-19
Filing date: 1965-02-03
Publication date: 1967-10-10
Anticipated expiration: 1984-10-10
Also published as: GB1081371A; CH422013A; SE301989B

Description

Oct. 10, 1967 w KOCH ETAL 3,345,941

ADJUSTABLE VIBRATING ROLLER IN THE INKING MECHANISM OF A PRINTING MACHINE Filed Feb. 5, 1965 /r'7v nlors Malena: A e FRIE'QRMH 6150;:

United States Patent 3,345,941 ADJUSTABLE VIBRATING ROLLER IN THE INKING MECHANISM OF A PRINTING MACHINE Werner Koch, Offenbach am Main, and Friedrich Preuss,

Neu-Isenburg, Germany, assignors to Roland Olfselmaschinenfabrik Faber & Schleicher A.G., Offenbach am Main, Germany, a firm of Germany Filed Feb. 3, 1965, Ser. No. 430,051 Claims priority, application Germany, Feb. 19, 1964,

R 37,248 2 Claims. (Cl. 101-350) The invention relates to an inking mechanism for printing presses, in which each rubbing roller has its own drive for the axial rubbing movement.

In such inking mechanisms it is known to derive each rubbing movement from a common shaft, by means of mutually adjustable double eccentric members for alteration of the stroke. With the alteration of the stroke of the rubbing movement, a phase displacement and thus an alteration of the commencement of the rubbing necessarily occur in such a construction. If the stroke is adjusted from zero to its maximum value, then the commencement of the rubbing changes by the equivalent of a 90 rotation of the form cylinder. It is thus not possible, on adjustment of the stroke, to keep the commencement of the rubbing to a predetermined value, each stroke magnitude corresponding to a diiferent but fixed commencement point. In connection with the use of modern highly concentrated inks, which have to be printed in extremely thin layers, it is however necessary in dependence on the pattern to be printed in each case, to adjust the rubbing movement and thus the region of the highest rubbing speed. It must furthermore be possible to alter the stroke of each rubbing roller independently of this.

It is an object of the invention to provide an inking mechanism in which each rubbing movement is individually adjustable in known manner with regard to its stroke, and is also adjustable in its phase position, independently thereof.

It is a further object of the invention to provide an inking mechanism in which the rubbing movement of each rubbing roller is derived from a shaft which can be rotated relative to the press by a releasable clutch, whereby a simple and easily supervised construction is obtained. The clutch is preferably so formed that the parts to be coupled can be rotated relative to each other in a stepless manner within 360. It is thus possible to position the commencement point and also the commencement direction of the rubbing movement, so that an optimum printed product results.

The arrangement according to the invention is of special advantage in an inking mechanism in which each rubbing roller is associated with the printing form in each case through only one form roller. In known inking mechanisms, the form rollers are allocated in pairs to each rubbing r-oller, so that the paths of the ink from the rubbing roller, corresponding to a predetermined axial rubbing roller position, through the two form rollers, are of different lengths. On the other hand, the form rollers coacting with the same rubbing roller additionally have a mutual influence upon each other when the printing form is inked in. The advantages of the adjustment of the rubbing in accordance with the invention, are only completely obtained in connection with inking mechanisms in which each rubbing roller inks the printing form only through a single form roller.

3,345,941 Patented Oct. 10, 1967 The above and other objects and advantages of the invention will be clear from the following description taken with reference to the accompanying diagrammatic drawings which are given by way of example and in which:

FIG. 1 is a sectional view of a drive arrangement for distribution rollers;

FIG. 2 is an elevation view of the drive arrangement; and

FIG. 3 is a roller diagram of an inking mechanism.

On a rotating shaft 1 which is mounted parallel to the side wall of a printing press, and which rotates synchronously with a form cylinder 21, a drive for the axial rubbing movement of each

rubbing roller

2, and 20, respectively, being arranged. Each comprises a flanged collar 3 which carries a number of clamping discs 4 in a recess. The discs may be initially slightly dished and are flattened in response to an axial pressure exerted thereupon by tightening screws 6. The resulting radial extension of the discs clamps collar 3 to shaft 1. Coupling or clamping discs of this kind are well known in the art and do not constitute part of the invention. After releasing screws 6, the collar 3 can be rotated as desired on the shaft 1, the

setting rings

7 and 8 securing of the collar 3 against axial displacement on the shaft 1 when the collar is released from the shaft by loosening screws 6. The collar 3 has two keys 9 which are disposed diametrically opposite to each other and which engage in corresponding grooves 10 of an adjustable eccentric disc 11. The eccentric disc 11 is provided with a slot 12 so that it can be displaced in radial direction. By means of a nut 13, the eccentric disc 11 can be fixedly clamped in any position, with the interposition of a washer 14. An annular member 16 secured by a disc 15 transfers the rotational movement of the eccentric disc 11 by means of a rod 17 and an angular lever 18 onto the rubbing roller 2 as an axial movement.

In the inking mechanism shown in FIG. 3, one form roller 19, which transfers the ink to the form cylinder 21, is allocated to each rubbing roller 2.

We claim:

1. In an inking device for a printing press in combination; a rotatable form cylinder; a rubbing roller rotatable about an axis parallel to the rotational axis of the form cylinder and axially displaceable in reference thereto; a reciprocating drive means for axially reciprocating said rubbing roller, said drive means including a rotary shaft rotated at a synchronous speed with said form cylinder, and transmission means transmitting the rotation of said shaft as a lengthwise reciprocating movement to said rubbing roller; a first adjustable means for varying the length of said reciprocating movement; and a second adjustable means independently operable from the first adjustable means for varying the beginning of said reciprocating movement in reference to the angular position of the rubbing roller while leaving unchanged the length of the reciprocating movement.

2. In an inking device for a printing press: a lengthwise displaceable rotary rubbing roller; and a reciprocatory drive means for axially reciprocating said rubbing roller, said drive means including a first adjustable means for varying the length of the stroke of said drive means, said first adjustable means including a rotary shaft, an annular member eccentrically rotatable in unison with said shaft, means for varying the eccentricity of said member in reference to the shaft and transmission means coupled to said annular member and said roller for trans- 3 4 mitting a rotational movement of said member as a References Cited reciprocating rectilinear movement to the roller, and a UNITED STATES PATENTS second adjustable means independently operable of the rst adjustable means for Varying the beginning f id 1,741,414 12/1929 GTaf 10135O stroke in reference to the angular position f th bbi 5 2,242,214 5/ 1941 Huck 10135O roller il le ving unchanged the length of the stroke, 3182 322 3; 32; 523 follmggg gt d d' t d' t y said secon a us able means inclu ing a suppor mem 28 5/1964 Ydmgren 1O1 35OX ber supporting said annular member and supported on said shaft for rotation in unison therewith, and clamping means for securing said support member in any 1 ROBERT PULFREY P nmary Examiner selected angular position on said shaft. H. P. EWELL, Assistant Examiner.

Claims

1. IN AN INKING DEVICE FOR A PRINTING PRESS IN COMBINATION; A ROTATABLE FROM CYLINDER; A RUBBING ROLLER ROTATABLE ABOUT THE AXIS PARALLEL TO THE ROTATIONAL AXIS OF THE FORM CYLINDER AND AXIALLY DISPLACEABLE IN REFERENCE THERETO; A RECIPROCATING DRIVE MEAND FOR AXIALLY RECIPROCATING SAID RUBBING ROLLER, SAID DRIVE MEANS INCLUDING A ROTARY SHAFT ROTATED AT A SYNCHRONOUS SPEED WITH SAID FORM CYLINDER, AND TRANSMISSION MEANS TRANSMITTING THE ROTATION OF SAID SHAFT AS A LENGTHWISE RECIPROCATING MOVEMENT TO SAID RUBBING ROLLER; A FIRST ADJUSTABLE MEANS FOR VARYING THE LENGTH OF SAID RECIPROCATING MOVEMENT; AND A SECOND ADJUSTABLE MEANS INDEPENDENTLY OPERABLE FROM THE FIRST ADJUSTABLE MEANS FOR VARYING THE BEGINNING OF SAID RECIPROCATING MOVEMENT IN REFERENCE TO THE ANGULAR POSITION OF THE RUBBING ROLLER WHILE LEAVING UNCHANGED THE LENGTH OF THE RECIPROCATING MOVEMENT.