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Printing equipment

A technology of tools and printing areas, applied in printing process, printing, printing machines, etc., can solve problems such as uneven diffusion, uncontrolled, and damage to printing uniformity, and achieve the effect of improving printing quality and printing quality

Inactive Publication Date: 2004-10-20
厄曼公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the dot gain is successful in spreading the printing ink onto the unprinted areas, the spreading is uneven and uncontrolled
The result is a spurious pattern on the printed surface, which compromises the uniformity of the print

Method used

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  • Printing equipment
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] see figure 1 , shows the screen 10 including the screen grid lines 14 . The screen grid lines 14 cross each other to form screen dots 16 therebetween. The grid point 16 is a rhombus with a diagonal ratio of 0.5.

[0031] A discontinuity 18 is formed in the screen grid line 14 which connects two adjacent screen points 16, 16'. figure 2 These interrupts 18 are shown more clearly in . The interruption 18 is V-shaped (herringbone pattern) and has two teeth 20,22. The two teeth 20, 22 form an angle of 45 degrees, and have a length of about 140 μm and a thickness of about 10 μm.

[0032] see image 3 , shows the printing zone 24 comprising the screen 10 bounded by peripheral grooves 26 . An ink moistening screen 28 is provided between the peripheral groove 26 and the screen plate 10 .

[0033] To perform printing, the screen dots and peripheral grooves are filled with printing ink. Excess printing ink is removed with a squeegee, the stencil grid lines supporting the ...

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PUM

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Abstract

The invention concerns a printing equipment comprising a gravure screen (10) formed by a grid of criss-cross gravure screen lines (14) forming between them gravure screen points (16). The gravure screen comprises at least a zone wherein each gravure screen point is connected to at least another neighbouring gravure screen point by a break (18) in the gravure screen line separating the gravure screen points.

Description

technical field [0001] The invention relates to a printing tool comprising a raster formed by a grid formed by intersecting raster lines which mutually form raster dots ( raster points). Background technique [0002] Photogravure platemaking or photogravure printing has been known since the 19th century. Over time, several improvements have been made to it. A printing tool with a fine grid still called a screen is usually a plate cylinder. This stencil serves both as an ink fountain and as a support for the scraper. A stencil consists of intersecting stencil grid lines that form stencil points between each other. Before printing, the screen dots are filled with printing ink, and the scraper sweeps the screen to remove excess printing ink. During printing, the support (in most cases paper) contacts the screen and the printing ink in the screen dots is deposited onto the paper. This printing method can print with fairly good quality. However, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F31/26B41F9/00B41F13/11B41M1/10B41N1/06
CPCB41F13/11B41N1/06B41F9/00B41M1/10
Inventor 米歇尔·利维
Owner 厄曼公司