Patent ID: 6536967
Filing Date: 2003-03-25
Classification: B41J

Abstract:
A line printer, comprising:a feed drive unit for driving a paper feeding member; a head drive unit for driving a line head disposed along a main scan direction orthogonal to a paper feeding direction; white line detecting means for detecting each of white lines which serve as non-print areas; print data area detecting means for detecting print data areas set in one-block units with the detected white lines as boundaries; division number calculating means for calculating division numbers for divisionally driving the line head in every area extending in its main scan direction, based on the result of comparison between the numbers of dots set in every line of the print data areas in the detected one-block units and a maximum number of printable dots set by the head drive unit and outputting print data therefrom; maximum division number detecting means for detecting maximum division numbers in the print data areas set in the one-block units; paper feed velocity setting means for setting paper feed velocities by the feed drive unit in inverse proportion to the detected maximum division numbers; and printing executing means for operating the head drive unit and the feed drive unit under the condition of the detected maximum division numbers and the set paper feed