Unlock instant, AI-driven research and patent intelligence for your innovation.

Visual checking device of exposed printing plate

A visual inspection and exposure technology, applied in the direction of measuring devices, optical testing of flaws/defects, material analysis through optical means, etc., can solve problems such as quantitative visual identification

Inactive Publication Date: 2019-05-24
苏州铭联印刷科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also not possible to visually discern quantitatively the difference in deviation between the uncalibrated and calibrated states at the significant 50% tone value

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Visual checking device of exposed printing plate
  • Visual checking device of exposed printing plate
  • Visual checking device of exposed printing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] figure 1 A conventional inspection mark 1 is shown which is visible on the printing plate after the printing plate 5 has been exposed in the pre-press stage. This check mark 1 is also called a tone value wedge (Tonwertkeil) and is used to check the process calibration in the prepress phase over the entire tone value distribution range from 1 to 100%. To this end, the tonal values ​​are shown in gray scale (Graustufen), where the upper bar 11 shows the reference tonal value unaffected by the prepress process, while the lower bar running parallel thereto shows the calibrated The hue value is 12. In addition, in the upper area there is a tone value scale 10, which specifies the tone value in percent. Here, the tonal values ​​in the range of 10% to 90% are specified in steps of 10%, while the tonal values ​​in the range of 1% to 10% and the polytone values ​​in the range of 90% to 100% are expanded from each other in order to be able to visually discern the albeit slight...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a visual checking device of an exposed printing plate (5). The visual checking device is arranged on the printing plate (5) in a form of at least one checking marks (1, 2, 3 and 4) during exposing of the printing plate (5). The visual checking device is characterized in that the checking mark is composed of at least strips (32 and 33) extending parallelly as many as possible, one strip shows non-calibrated tone value distribution (32) surrounding one definite screening gray value, the other strip shows a calibrated definite screening gray value (33) during printing, atleast one area is shown on the checking mark (3), and the non-calibrated tone value distribution (32) on the area and the calibrated definite screening gray value (33) are uniform in visual color.

Description

technical field [0001] The invention relates to a device for visual inspection of exposed printing plates of a printing press, which is provided on the printing plate in the form of at least one inspection mark when the printing plate is exposed. Background technique [0002] The printing process is basically divided into the pre-press stage, printing press and post-press processing. The aim of each printing process is to produce a print that follows the printed design as precisely as possible. A printed drawing can exist as a printed drawing, but it can also exist digitally as an image file. The print image as image file is digitally prepared in the prepress stage using a scanning image processor for printing, making the data available thereafter suitable for exposure of the printing plate of an offset printing press. In addition to the actual printed image, various markings and check areas are provided on the printing plate, which are located in the border area of ​​the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01N21/956
Inventor 唐洪斌
Owner 苏州铭联印刷科技有限公司