Patent ID: 6836276
Filing Date: 2004-12-28
Classification: B41C,B41J

Abstract:
A thermal master making device including a thermal head, which have a plurality of heat generating elements arranged in an array in a main scanning direction, moving a thermosensitive medium relative to said thermal head in a subscanning direction perpendicular to the main scanning direction while pressing said thermosensitive medium against said thermal head, and causing said plurality of heat generating elements to repeatedly generate heat in accordance with an image signal to thereby make a master, said thermal master making device comprising:detecting means for detecting a print patio in terms of a number of heat generating elements to be energized at the same time; correcting means for correcting an amount of heat to be generated by the thermal head; and storing means for storing print ratio data output from said detecting means; wherein said correcting means corrects, based on past print ratio data stored in said storing means, the amount of heat to be generated by the thermal head at a time of a next printing at least twice during a single master making operation.