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Method for pretreating printing substrates for inkjet printing

A technology for printing materials and inkjet printing, applied in printing, copying/marking methods, printing devices, etc., can solve the problems of reducing the quality of printed products, reduce the quality of printed images, etc., and achieve the effect of preventing streak formation

Active Publication Date: 2021-12-10
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This streak formation (also called "missingnozzle" or "missing line" in English) is undesirable because it degrades the quality of the printed image and thus the quality of the printed product

Method used

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  • Method for pretreating printing substrates for inkjet printing
  • Method for pretreating printing substrates for inkjet printing
  • Method for pretreating printing substrates for inkjet printing

Examples

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Embodiment Construction

[0024] figure 1 A preferred embodiment of the method according to the invention is shown. figure 1 At the same time, a preferred embodiment of the device which is preferred for carrying out the method is also shown.

[0025] The printing material 1 (for example paper, cardboard or film) has side edges 2 . The printing material is conveyed along the device in a conveying direction 3 . The device can be part of an inkjet printing machine and can include at least one conveying element (in particular a conveying cylinder or a conveying belt) for the printing material. The transverse direction 4 runs perpendicular to the side edge 2 and the longitudinal direction 5 runs parallel to the side edge 2 .

[0026] A device suitable for carrying out the method according to the invention comprises an ink printing head 6 having an array of individually steerable nozzles 7 (extending substantially parallel to said transverse direction). The ink printing head 7 can be configured as an arr...

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PUM

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Abstract

The invention relates to a method for pretreatment of a printing substrate for inkjet printing, wherein the spreading of inkjet printing dots (15) on said printing substrate (1) is influenced, which is distinguished in that such The spreading properties are influenced such that the inkjet printed dots (15) spread anisotropically. An undesired reduction in the quality of the printed image due to ink nozzle failures, for example, can advantageously be reduced or avoided by means of the anisotropic diffusion. Influencing the diffusion properties can be achieved by anisotropically applying a liquid (11), especially a primer or a varnish, to the printing substrate, or by using charged particles, in particular by means of a plasma or corona, or an anisotropic treatment (12) of the printing material with electromagnetic radiation, in particular with laser radiation.

Description

technical field [0001] The invention relates to a method for pretreatment of printing substrates for inkjet printing. [0002] The invention is in the technical field of the graphic industry and here in particular in the technical field of industrial ink printing (inkjet, Inkjet) on flat substrates, i.e. the application of liquid ink to pages (preferably made of paper, cardboard or plastic) areas on sheet or web form substrates. Background technique [0003] The application of liquid ink in the known DOD ink printing method (drop-on-demand, drop-on-demand) is achieved by producing a printed image on a flat printing substrate, wherein an ink print head with individually actuatable nozzles (abbreviation: print head) generates very small (preferably in the picoliter range) ink droplets according to the image to be printed and transfers these ink droplets as printing dots to the printing material in a contactless manner. The nozzles can be actuated by means of piezoelectric ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41M5/00B41M1/36B41M1/24B41J2/005
CPCB41J2/005B41M1/24B41M1/36B41M5/00B41M5/0011B41J3/38B41M5/0017B41J11/0015
Inventor P·哈赫曼
Owner HEIDELBERGER DRUCKMASCHINEN AG
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