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Method and printing press for printing a substrate

A technology for printing machines and substrates, applied in printing, printing devices, etc., can solve the problems of unclear spraying and atomization, imprecise edges and boundaries of printed images, uneven surface potential, etc., to improve coverage, improve printed images, Reduce fog effect

Inactive Publication Date: 2012-01-11
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a conventional polymer or paper surface has a completely disordered static surface charge as a result of several different unwinding / unwinding operations, which is also very inhomogeneous in terms of its potential
The resulting printed image is likely to have imprecise edges and borders, mainly caused by ambiguous spraying and fogging of the ink

Method used

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  • Method and printing press for printing a substrate
  • Method and printing press for printing a substrate

Examples

Experimental program
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Embodiment Construction

[0039] The printing press 1 comprises an ink carrier 3 which, in the exemplary embodiment shown here, is designed as an endless belt and is guided around a plurality of deflection rollers 5 . The ink of the printed substrate 7 is applied to the ink carrier 3 .

[0040] In order to print the substrate 7 , energy is introduced into the ink through the ink carrier 3 in the printing zone 9 . Due to the introduction of energy into the ink, a part of the ink evaporates, by which means an ink drop is projected onto the substrate 7 . A suitable energy to be introduced into the ink is eg a laser / laser 11 . A suitable laser 11 that can be used to introduce energy into the ink is, for example, a fiber laser operating in the fundamental mode.

[0041] In order to compensate / replace the ink transferred to the substrate 7 by means of the laser 11 , the ink carrier 3 is driven around the deflection roller 5 , as indicated by the arrow 13 . In this case, the transport direction 13 of the i...

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PUM

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Abstract

The invention relates to a method for printing a substrate (7). In said method, ink is transferred from an ink support (3) to the substrate according to a predefined pattern by a device for applying energy (11) that applies energy to the ink through the ink support (3) without the ink support (3) and the substrate (7) touching each other. The substrate (7) is introduced into an electric field such that a homogeneous charge field is generated on the surface of the substrate (7). The invention further relates to a printing press comprising an ink support (3) which can be coated with a printing ink, and a device (11) for applying energy to the ink. Said device (11) for applying energy is disposed in such a way that the energy can be applied on the side of the ink support (3) facing away from the ink in a printing zone (9) such that ink is transferred from the ink support (3) to a substrate (7) that is to be printed within an effective range of the energy. Furthermore, in order to generate an electric field, a voltage source (19; 21) or a current source (19; 21) is provided to generate a homogeneous charge field on the surface of the substrate (7).

Description

technical field [0001] The present invention relates to a method of printing a substrate in which energy is introduced into ink through means for introducing energy through an ink carrier without contacting the substrate so that the ink is transferred from the ink carrier in a predetermined pattern Transfer / transfer to substrate. Furthermore, the invention relates to a printing press comprising an ink carrier to which ink to be printed can be applied and means for introducing energy into the ink, said means for introducing energy being arranged such that the energy can be transferred to the ink carrier The side facing away from the ink is introduced into the printing area, so that the ink is transferred from the ink carrier to the substrate to be printed in the area of ​​action of the energy. Background technique [0002] A method of printing a substrate is known, for example from US-B 6,241,344, in which ink droplets are projected from an ink-coated carrier onto the substr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/14B41J11/00
CPCB41J2/14161
Inventor F·克莱内耶格尔J·卡祖恩U·莱曼
Owner BASF AG