Title:
Device for increasing contrasts at tone value leaps and contours in printing forms
United States Patent 2962548
US Patent References:
Video-signal tone-adjusting network
- - 2777058
Method of and apparatus for electromechanicaly producing printing forms from line-originals
- - 2880270
Apparatus for producing screened printing forms with automatic correction of tone values
- - 2892887
Video-signal tone-adjusting network
- - 2777058
Method of and apparatus for electromechanicaly producing printing forms from line-originals
- - 2880270
Apparatus for producing screened printing forms with automatic correction of tone values
- - 2892887
Inventors:
Heinz, Taudt
Publication Date:
11/29/1960
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Export Citation:
Assignee:
Rudolf, Hell Kommanditgesellsch
Primary Class:
Other Classes:
358/3.290
International Classes:
H04N1/409