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Printing press with a washing device for an inking unit

A technology for printing presses and inking, which is used in printing presses, general parts of printing machinery, printing, etc., and can solve problems such as problems with ink replacement.

Active Publication Date: 2008-06-11
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ink changes from dark to light are especially problematic

Method used

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  • Printing press with a washing device for an inking unit
  • Printing press with a washing device for an inking unit
  • Printing press with a washing device for an inking unit

Examples

Experimental program
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Effect test

Embodiment Construction

[0038] Figure 1 shows an offset printing press 1 in a tandem configuration with a feeder 2 and four printing units 7a-d for the four primary colors black, yellow, magenta and cyan, on which an unprinted stack 31 is located. device. The delivery 9 of the printing press follows the fourth printing unit 7d. The gripper bridge runs around the delivery with the aid of a chain guide. The gripper bridge picks up the printed sheet and transports it to the sheet stack, where it is deposited.

[0039]Each of the four printing units 7 a - d has an impression cylinder 4 , a blanket cylinder 5 and a printing form cylinder 6 , on which the respective printing form is tensioned. The printing plates are inked by means of inking units 8a-d, which will be described in more detail below.

[0040] The inking unit shown in Figure 2 consists of a knife cartridge 13, an ink fountain roller 14, four inking rollers 28, 29, 30 and 31 and a series of further rollers 15 to 27, through which the inking...

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PUM

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Abstract

A printing press includes inking units having rollers provided with a phobic coating made of a material of low surface energy. At least one roller of the inking unit remains uncoated. Ink residues are stripped off the uncoated roller and removed by a blade during a cleaning operation.

Description

technical field [0001] The invention relates to a printing press with one or more printing units and inking units for inking the respective printing plates, comprising inking rollers and cleaning devices assigned to the inking rollers, wherein each cleaning unit has Wiping means by means of which ink can be removed from the inking means. Background technique [0002] It has been known for a long time that in printing presses with a roller inking unit for inking the printing plate, the ink is removed from the scrape off one of the rollers of the device. Corresponding inking and cleaning devices are described, for example, in DE 195 11 231 B4, DE 197 08 435 C2 and DE 10 2005 015 790 A1. The rollers in known inking units generally consist of materials with good ink-accepting properties, for example rubber or two materials, Rissan, which have relatively high surface energies. The better the rollers of the inking unit take up the ink, the more difficult it is for the ink to be...

Claims

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Application Information

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IPC IPC(8): B41F31/20B41F31/26B41F35/04
CPCB41P2235/22B41F31/26B41F35/04
Inventor U·卢克哈特T·罗泽曼
Owner HEIDELBERGER DRUCKMASCHINEN AG
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