Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Patent
1995-03-31
1998-05-05
Reinhart, Mark J.
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
B41J 247
Patent
active
057482250
ABSTRACT:
A platesetting method and apparatus provides for dimensional and/or exposure sensitivity changes in a printing plate to be imaged in a platesetter. A condition sensor senses the temperature of the plate prior to exposure so that a control unit can adjust the control commands to the scanning exposure mechanism of the platesetter in order to compensate for any thermal expansion or exposure sensitivity shifts. An image to be recorded onto the plate material has a standard size at a standard plate material temperature. When the plate material is at a non-standard temperature, as determined by the thermal sensor, a program, stored in memory, calculates a new image size based on the non-standard temperature and the thermal characteristics of the plate material which are also stored in memory. The imagesetter electronic controller then exposes an image having a size which will be the standard size when the plate material returns to the standard temperature.
REFERENCES:
patent: 4989039 (1991-01-01), Hayashi et al.
patent: 5471313 (1995-11-01), Thieret et al.
patent: 5552818 (1996-09-01), Agano et al.
Agfa Division - Bayer Corporation
Krolikowski Julie A.
Reinhart Mark J.
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