Method for controlling a powder sprayer

A duster and printing machine technology, applied in the field of duster, can solve the problems of printing quality reduction, achieve high printing quality and avoid adverse effects

Active Publication Date: 2008-04-23
海德堡印刷机械知识产权股份两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the printing quality is significantly reduced

Method used

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  • Method for controlling a powder sprayer
  • Method for controlling a powder sprayer

Examples

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Embodiment Construction

[0020] FIG. 1 shows a printing press 1 with printing units 2 to 5 and a delivery 6 . The delivery includes a chain conveyor 7 which deposits the printed sheets onto a delivery pile 8 . Furthermore, the printing press includes an inverting unit 9, which can be switched from a pure front printing mode to a perfect printing mode. In the pure front printing mode without turning over the sheets, the printed pages are printed not only in the printing units 2 and 3 arranged in front of the turning unit 9 but also in the printing units 4 and 5 arranged behind the turning unit 9 sheet for front printing. In perfecting mode, the front side of the printed sheet is printed in the upstream printing units 2 and 3 and the reverse side is printed in the downstream printing units 4 and 5 . A duster 10 is arranged in the delivery 6 , which dusts the printed sheets conveyed by the chain conveyor 7 .

[0021] FIG. 2 shows that the duster comprises a nozzle beam 11 with shroud nozzles 12 arrang...

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Abstract

The invention relates to a method of controlling a powder sprayer (10) having a fan jet nozzle configuration (13) in a printing press, includes controlling the fan jet nozzle configuration (13) as a function of operating parameters of the printing press. And when the output speed of a supportive-air fan jet (19) is changed, the output speed of a powdered-air core jets (20) of the fan jet nozzle configuration (13) is kept not change.

Description

technical field [0001] The invention relates to a method for controlling a duster with a sleeve nozzle arrangement in a printing press. Background technique [0002] A duster with a sleeve nozzle arrangement is described in DE 100 01 590 A1. The nozzle heads are arranged in a row in this duster. Each nozzle head has two nozzles, from which a jet of powder air is ejected each. A blowpipe is arranged above the nozzle head, from which a jet of compressed air emerges. The delivery velocity of the compressed air jet is approximately twice the delivery velocity of the powder air jet. These compressed air jets together form a powder-free support air jacket flow which surrounds the powder air jet on all sides. The supporting air sleeve flow shields the powder air jet from the eddy currents caused by the movement of the grippers transporting the printed sheets. This ensures that the powder air jet is applied to the printed sheet without being affected by turbulence. However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F23/06B05B7/14
CPCB05B1/202B41F23/06B05B7/1404B05B7/1486
Inventor P·T·布拉泽C·哈斯M·施特尔特
Owner 海德堡印刷机械知识产权股份两合公司
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