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Equipment for duplex printing

A technology of double-sided printing and front-side printing, used in printing, printing machines, general parts of printing machinery, etc., to prevent ink splitting and pollution

Active Publication Date: 2017-09-26
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this, however, additional printing units are introduced into the machine, in particular for reverse printing, and the internal turning unit, which causes additional costs

Method used

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  • Equipment for duplex printing
  • Equipment for duplex printing
  • Equipment for duplex printing

Examples

Experimental program
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Embodiment Construction

[0019] Figure 1a A partial view of a printing press 1 is shown, which comprises a transport cylinder 2 and at least two (counter-press) impression cylinders 3 , 4 , 5 . The second impression cylinder 4 is designed here as a cylinder which guides the sheet over 360°. Furthermore, the partial illustration shows two printing heads 7a, 7b in the form of inkjet printing heads, wherein the first inkjet printing head 7 can be pivoted between the first impression cylinder 3 and the second impression cylinder 4 . Furthermore, the sheet 6 that has undergone the printing process can be seen. The sheet 6 is printed on the first impression cylinder 3 by the first inkjet print head 7 a on the front sheet and delivered to the second impression cylinder 4 . The printed front sheet of the sheet 6 now faces inwards on the second impression cylinder 4 .

[0020] Figure 1b shown with Figure 1a The same partial view of the printing machine 1 described in . In this case, the second impres...

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Abstract

The invention relates to a device for double-sided printing of sheet-form printing substrates. The printing material is guided over 360° on the counter cylinder. The invention is distinguished by the fact that the sheets are guided through more than 360° with the reverse printing sheet to the active area of ​​the ink application unit, from which the printing material is already on the front printing sheet on the upstream counter cylinder print.

Description

technical field [0001] The invention relates to a device for double-sided printing of sheet-form printing materials having the features stated in the preamble of claim 1 . Background technique [0002] The duplex printing of sheet-form printing materials is known from the prior art. Here, the result of the double-sided printed sheet is achieved by first printing the front side of the sheet completely in one stroke of the printing press. Subsequently, the sheets are turned over manually or by an external machine and fed back to the printing press. On the second pass of the machine, the reverse side of the sheet is then printed. In this case, the reversing creates difficulties in feeding the sheets to the machine again in register and in particular in an exact fit. Apart from this, on the one hand, the turning of the sheets and the refeeding of the sheets to the printing unit are two additional work steps. Other solutions provide for two-sided printing without the sheets b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F7/12
CPCB41F13/46B41F19/007B41F21/106B41F21/108B41F13/18B41F5/02B41J11/007B41J11/04
Inventor T·施密特
Owner HEIDELBERGER DRUCKMASCHINEN AG
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