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Method and device for the control and the management of the printing parameters of a flexographic printing machine

A technology for flexographic printing presses and control devices, which is applied to general parts of printing machinery, printing presses, rotary printing presses, etc., and can solve problems such as deformation, affecting printing quality, and incorrect printing pressure.

Active Publication Date: 2016-11-16
BOBST FIRENZE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this solution has drawbacks, especially in terms of the constructional complexity that must be provided for the control system responsible for changing the relative distance between the rollers
Furthermore, especially in flexographic printing, where the contact pressure between the roller and the medium greatly affects the print quality, adjusting the pressure in order to counteract variations in printing parameters may instead have a negative effect on said print quality
In fact, since the printing plate is made of plastic material, the use of excessive pressure may cause it to deform, causing printing defects typical of incorrect printing pressure

Method used

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  • Method and device for the control and the management of the printing parameters of a flexographic printing machine

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Embodiment Construction

[0013] Referring to the above figures, the device according to the invention is generally indicated with the reference numeral 1 . The device is associated with a flexographic printing unit comprising a set of mutually tangential and counter-rotating rollers that transfer the ink film onto the printing medium, according to a construction known in the art. In particular, the printing unit comprises a first roller or anilox roller 2 associated with a doctor blade 3, from which ink is transferred to a second roller or printing roller (or printing sleeve 4) superior. Also associated with these two rollers is a third or counter roller 5 on which at least one printing medium is at least partially wound. Reference numeral 50 denotes a printing medium to which printing is applied and wound between the printing roller 4 and the reverse roller 5 .

[0014] Looking at the invention more closely, the device comprises at least one infrared emitting device in the form of an infrared emitt...

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Abstract

The present invention relates to a device or method for detecting and adjusting the printing parameters in flexographic printing machines.

Description

technical field [0001] The invention relates to a device or a method for detecting and adjusting printing parameters in a flexographic printing press. Background technique [0002] As is well known, a flexographic printing press comprises a plurality of mutually tangential and counter-rotating rollers, which transfer the ink film to the print medium by a set comprising, for example, an ink cartridge, an anilox roller and a doctor blade. A particularly pressing problem is that as the printing speed increases (ie, the rotational speed of the printing rollers increases), the quality of ink transfer from one roller to the other varies, thus making the final print quality poor. Especially as the transfer quality of the ink varies, printing parameters based on eg printing density and colorimetric parameters (laboratory) vary in an uncontrolled and independent manner. Chromaticity parameters include lightness (L), expressed as a percentage (O is black, 100 is white), while "a" and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/00B41F31/00B41F13/22B41F5/24
CPCB41F5/24B41F13/22B41F31/002B41F31/005B41F33/0045B41F23/04
Inventor 乌戈·巴尼奥利费德里科·邓南遮卢多维科·法拉迪
Owner BOBST FIRENZE
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