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Digital printing machine

A printing press and digital technology, applied in the field of digital printing presses, which can solve problems such as sheet bending

Active Publication Date: 2018-03-20
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a risk of sheet bending, especially if the sheets are conveyed at high machine speeds and consist of thin paper

Method used

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  • Digital printing machine
  • Digital printing machine

Examples

Experimental program
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Embodiment Construction

[0013] figure 1 A digital printing press with a plurality of print heads 1 is shown. However, it is also possible to provide only a single printing head 1 of this type. The single or each printing head 1 works without contact (NIP—non-impact printing) and is preferably used for inkjet printing.

[0014] A conveyor belt device 2 transports a printing substrate 3 made of paper, cardboard or foil past the digital printing press. The conveyor belt arrangement 2 comprises a first sheet conveyor belt 4 and a second sheet conveyor belt 5 . The first sheet conveyor belt 4 runs around a first deflection roller 6 and a second deflection roller 7 . The second sheet conveyor belt 5 runs around a third deflection roller 8 and a fourth deflection roller 9 . The first and fourth deflection rollers 6, 9 are internally loaded with a vacuum, as indicated by the arrows. The sheet conveyor belts 4 , 5 are subjected to vacuum via the first and fourth deflection rollers 6 , 9 . Each sheet con...

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Abstract

The invention relates to a digital printing machine comprising a printing head (1) for printing the front and back sides of a printing sheet (3), a conveyor belt device (2) for feeding the printing sheet (3), and an overturning device (17) for flipping a printing sheet (3) between a printing front side and a printing back side, wherein the overturning device (17) has a first vacuum drum (18), a second vacuum drum (19) and an overturning drum (20) having a folder-type picker (21) for holding the printing sheet (3).

Description

technical field [0001] The invention relates to a digital printing machine with a printing head, a conveyor belt device and a turning device. Background technique [0002] One such digital printing machine is described in DE 10 2006 009 484 B4. In this digital printing machine, the inverting device can be designed as an inverting bag. When the sheet is turned in the turning pocket, the sheet abuts against the end of the pocket. In this case, there is a risk of sheet bending, especially if the sheets are conveyed at high machine speeds and consist of thin paper. Contents of the invention [0003] The object of the present invention is to provide a digital printing press which is also suitable for processing sheets with a small grammage. [0004] This object is solved by a digital printing press with the features of claim 1 . The digital printing machine according to the invention comprises a printing head for printing the front side and the reverse side of the printed s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J13/00
CPCB41J13/009B41J3/60B41J13/08B41J13/226B65H5/12B65H5/224B65H85/00B65H2801/15
Inventor M·默林格J·弗里德里希斯
Owner HEIDELBERGER DRUCKMASCHINEN AG
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