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US 6,146,817 AGranted
Method of and apparatus for masking a master for reproduction
AssigneeAgfa-Gevaert
InventorsWolfgang Zahn, Friedrich Jacob, Gunter Findeis
Life of this patent
Estimating the term…
Abstract
A negative to be printed is masked. The mask, or an image of the mask in the plane of the negative, or both the mask and the image, have a low resolution of 0.1 to 2 line pairs per millimeter.
Claims32
A method of reproducing a master, comprising the steps of masking said master, the masking step including generating a mask which represents a negative of said master;
- and copying the masked master on photosensitive material, at least one of the masking and copying steps being performed in such a manner that said mask has low resolution, or said mask is used in an unsharp manner to yield a low resolution image of the mask on the photosensitive material, or both, wherein low resolution means a resolution of about 0.1 to about 2 line pairs per millimeter in the plane of the master being masked.
Dependencies are inferred from the claim text.