Half-tone printing process

Details Half-tone printing process Half-tone printing process

1997-04-07

1999-06-01

Yan, Ren

Printing

Stenciling

Processes

101484, B41M 112

Patent

active

059079967

ABSTRACT:
In a half-tone printing process according to the invention, there is provide at least one half-tone printing stencil having at least two regions which have stencil opening structures which are uniform but different from region to region. A sample print is carried out, using such a half-tone printing stencil, to produce printed images associated with the respective regions. A comparison is made of optical data of the respective printed images with corresponding desired values. Readjustment of printing parameters can occur based upon the comparison in such a way that the optical data in the case of the next print approach the corresponding desired values. To this end, there may preferably be an optical measuring device for measuring the optical data in the prescribed regions of the half-tone print, and a control unit altering the printing parameters as a function of the measured optical data.

REFERENCES:
patent: 4546700 (1985-10-01), Kishner et al.
patent: 4975862 (1990-12-01), Keller et al.
patent: 5068810 (1991-11-01), Ott
patent: 5367384 (1994-11-01), Sakamoto
patent: 5460090 (1995-10-01), Pfeiffer et al.
patent: 5740733 (1998-04-01), Mungenast

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