DE19947223A1 - Printer inker unit has ink applicator roller, anilox roller, ink duct, bearer rings, springs and printing form cylinder - Google Patents

Abstract

The inker unit has a machine frame in which is mounted a printing form cylinder (1) incorporating an ink-applicator roller (2), anilox roller (4) and ink duct. Both ball ends of the ink applicator rollers and anilox roller have bearer rings (8,9) which are pre-tensioned in a working position by means of springs (5). The printing form cylinder has bearing rings (10) cooperating with the bearing rings of the ink-applicator roller.

Description

The invention relates to an inking unit of a printing press.

DE 195 23 378 A1 is a sheet-fed offset rotary printing machine for multicolor printing consisting of forme cylinder, blanket cylinder and one with a plurality of ge controlled gripper systems provided central pressure cylinder known, Formzylin the and blanket cylinders have the same diameter and at least two printing surfaces each have and the number of gripper systems of the printing cylinder not equal to the number of Printing surfaces of the forme cylinder and the printing cylinder from at least a second Forme cylinder and blanket cylinder is assigned to an existing pair of cylinders.

Each forme cylinder has two printing surfaces and each printing surface of the forme cylinder it is its own short inking unit, consisting of an inking roller, anilox roller and ink box, assigned. The inking rollers are alternately on and off the forme cylinder adjustable, only inking the assigned printing area.

The object of the invention is to provide an inking unit, the rollers for avoiding of effects on the color transfer caused by changes in position be carried out precisely.

According to the invention the object is achieved by the features of the patent claim; expedient configurations are disclosed in the subclaims.

The invention is described in more detail below using an exemplary embodiment.

The drawing shows in:

Fig. 1 schematic diagram inking

Fig. 2 roller training.

With the example shown in Fig. 1 printing form cylinder 1 is a inking roll 2 in operative connection. The inking roller 2 can be set to or removed from the printing form cylinder 1 by means of a clocked eccentric 3 .

With the inking roll 2 is an anilox roller 4, also called screen roller, is in operative connection. The anilox roller 4 is assigned an ink fountain (not shown). The anilox roller 4 is supplied with a defined bias of a spring 5 produced against the inking roll 2 is pressed.

The two rollers 2 ; 4 are by gears 6 ; 7 connected to each other and to the gear train of the printing press ( Fig. 2).

On both sides on the bale ends of the rollers 2 ; 4 are bearer rings 8 ; 9 arranged. The bearer rings 8 ; 9 keep the center distance between the inking roller ze 2 and the anilox roller 4 in the working position under tension.

The required pressure pressure between the rollers is determined by an appropriate choice the elevator strength of the inking roller reached.

This arrangement ensures that with clocked inking rollers the Achsab stood between inking roller 2 and anilox roller 4 in the working position with high accuracy can be kept constant.

According to one embodiment, the printing form cylinder 1 with printing form cylinder bearer rings 10 , which are in operative connection with the bearer rings 9 of the inking roller 2 , is fitted out.

This arrangement ensures that the reaction originating from the printing form cylinder forces cannot affect the quality of the coloring. Furthermore, he will it is enough that, contrary to the state of the art, hard inking roller covers are used can be made without the inking unit being sensitive to so-called channel beats.  

List of reference symbols

1

Printing form cylinder

2nd

Inking roller

3rd

Clock eccentric

4th

Anilox roller

5

feather

6

first gear

7

second gear

8th

first bearer ring

9

second bearer ring

10th

Printing forme cylinder bearer

Claims (3)

1. inking unit of a printing press with a clocked inking roller assigned to a printing form cylinder stored in the machine frame, an anilox roller and an ink fountain, characterized in that bearer rings ( 8 ; 9 ) are arranged on both ends of the inking roller ( 2 ) and anilox roller ( 4 ) and the bearer rings ( 8 ; 9 ) run under prestress in the working position. 2. Inking unit of a printing press according to claim 1, characterized in that the printing form cylinder ( 1 ) is equipped with printing form cylinder bearer rings ( 10 ) and the bearer rings ( 9 ) of the inking roller ( 2 ) are in operative connection with the printing form cylinder bearer rings ( 10 ). 3. Inking unit of a printing machine according to claim 1, characterized in that the bias is generated by springs ( 5 ) acting on the anilox roller ( 4 ).