An ink-jet recording head (1) is mounted on a carriage (2), recording engines (3, 3') for printing a recording sheet with ejected ink droplets are so disposed that a recording sheet can be inserted from one of different sheet feed passages (4, 4') and the ink is supplied to each recording engine (3, 3') from a common main tank (6). An ink-jet recorder has a control means (10) for comparing the amount of external print data with a reference amount of data, divides the print data into units of data of one page if the amount of print data is greater than the reference amount of data, and distributes the external print data to the recording engines. If the amount of print data is less than the reference amount of data, one recording engine is operated singly to execute printing.

Ink jet recorder

There is described an intaglio printing press comprising (i) a stationary machine frame (01 ) supporting an intaglio printing cylinder (07) and an impression cylinder (06) contacting the intaglio printing cylinder (07), and (ii) an inking system (12, 13, 16) for inking the intaglio printing cylinder (07), which inking system (12, 13, 16) comprises an ink-collecting cylinder (12) designed to contact the intaglio printing cylinder (07) and at least one inking device (13, 16) for supplying ink to said ink-collecting cylinder (12). The intaglio printing press further comprises a driving system (110; 115; 116) for rotating the ink-collecting cylinder (12) independently of the intaglio printing cylinder (07) and the impression cylinder (06) at least during maintenance operations.

Intaglio printing press with ink-collecting cylinder

The invention relates to continuous-feed inking units (11) of a printing machine and to a roller in this printing machine, each with improved delivery behaviour. The continuous-feed inking unit (11), in the roller train, may have a continuous-feed roller (01) and at least one roller (17, 22) arranged downstream of the continuous-feed roller (01), wherein this downstream roller (17, 22) has a lateral surface (02) made of an elastomeric material, and the elastomeric material has a multiplicity of randomly distributed cavities (07) which are open at the lateral surface (02) and are directed into the interior of this roller. In the case of the roller with the elastic lateral surface (02), the sum of all the cavities (07) on its lateral surface (02) in excess of the respective non-productive volume is greater than the volume of the fluid which is transferred from the lateral surface of this roller. Provision may also be made for the cavities on the lateral surface (02) to have flanks with surfaces which are in contact with the fluid film, wherein the fluid film rests on the lateral surface (02), and the surfaces of the flanks, with a layer thickness of less than 500 µm, in doing so following the relief formed by the lateral surface (02) and the surfaces of the flanks of the respective cavities (07).

Continuous-feed inking units of a printing machine, and a roller in this printing machine

The invention relates to a color deck (08) of a printing machine for inking a plate cylinder (07) comprising a roller nip having at least one first friction cylinder (12.1), wherein the at least one first friction cylinder (12.1) is driven by a drive motor (18) for the rotary drive thereof, wherein a freewheel clutch (50) is disposed between the first friction cylinder (12.1) and the drive motor (18).

Color deck of a printing machine

Die Erfindung beschreibt ein Verfahren zum Optimieren der Relativposition von zumindest zwei Druckwerkszylindern (21, 37, 40), bei dem die Relativposition der zumindest zwei Druckwerkszylinder aufgrund von Messwerten eingestellt wird. Die Messwerte umfassen erste Werte zu der Grose der Flache (9), mit der zumindest einer der Druckwerkszylinder einen weiteren Korper (5, 25, 40) beruhrt.

Verfahren und Vorrichtung zum Optimieren der Relativposition zumindest zweier Druckwerkszylinder

The machine i.e. sheet-fed rotary press (15) has a printing unit including a cylinder (6) covered with a hoist. Actuators (3) change the hoist in an axial and/or circumferential direction of the cylinder in its geometry. An image inspection device (19) is provided for geometrical measurement of printed sheets (20), and a computer (18) processes the measuring result. The computer executes a reference/actual value-comparison and controls the actuators in case of established deviations in such a manner that the established deviations are minimized.

Printing machine i.e. sheet-fed rotary press, has computer executing reference/actual value-comparison and controlling actuators in case of established deviations such that established geometry deviations are minimized

A method for operating a printing unit of a printing press includes operating the printing unit in a first operating mode, for example printing operation, and in a second operating mode, for example maintenance operation. In the first operating mode, a printing unit cylinder and a distributor roller are driven rotationally by a first motor and the distributor roller is driven axially by a second motor. In the second operating mode, the distributor roller is driven rotationally by a third motor and the distributor roller is driven axially by the second motor. A printing press for carrying out the method is also provided.

Printing Press and Method for Operating a Printing Unit of a Printing Press

A printing press includes at least one printing unit having a cylinder and a cover covering the cylinder. Actuators are associated with the cylinder for changing a geometry of the cover in axial and/or circumferential direction of the cylinder. Positioning electronics are connected to the actuators and a printing press machine control system is connected to the positioning electronics. An image inspection device is connected to the printing press machine control system at least for geometric measurement of printed printing materials. A printing press computer processes measured results from the image inspection device for carrying out a desired/actual value comparison and for driving the actuators to minimize determined deviations, in the event that deviations are determined.

Printing Press with Printing Plate Manipulation Device

The method for generating stable colour positions prior to receipt of operating pressure in print unit of press machine involves a colouring unit (6) and/or moisture unit being set in at least one print unit (2) with a plate cylinder (3) and a rubber blanket cylinder (4) that is located on the plate cylinder. In the same print unit is a colour reduction roller (7) adjusted on one of the cylinders (3, 4). The colour transmission is measured on the colour reduction roller or the rubber blanket cylinder. There may be a wiper (9) on the colour reduction roller to decrease colour.

Method for generating stable colour positions prior to receipt of operating pressure in print unit of press machine

Bei einem Verfahren zum automatisierten Justieren einer Rotationskorperpressung in einer Druckmaschine erfolgt eine Pressstreifenabbild-Messung auf einem Bedruckstoff. Hierbei werden ein Abbild eines ersten Pressstreifens, der von einem ersten Rotationskorper (1) zusammen mit einem zweiten Rotationskorper (2) gebildet wird, und ein Abbild eines zweiten Pressstreifens, der von dem zweiten Rotationskorper (2) zusammen mit einem dritten Rotationskorper (3) gebildet wird, ausgemessen.

Verfahren zum automatisierten Justieren einer Rotationskörperpressung in einer Druckmaschine

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