Title:
【発明の名称】印刷機及びその走査同期データの算出方法
Document Type and Number:
Japanese Patent JP2977156
Kind Code:
B2
Abstract:
A printer and a method for calculating scanning synchronization data are provided. The printer includes a plurality of rollers (51); a photoreceptor belt (54) circulating on an endless track by and around the plurality of rollers (51) and having a transparent band (52) continuously formed in the vicinity of one edge of the photoreceptor belt (54) and at least one transparent window (53) disposed a predetermined distance from the transparent band (52), a plurality of laser scanning units (60, 70, 80, 90) disposed a predetermined distance from the photoreceptor belt (54) for scanning beams onto the photoreceptor belt (54), photodetectors (64, 74, 84, 94) for detecting beams having passed through the transparent band (52) and transparent window (53), among beams emitted from the laser scanning units (60, 70, 80, 90), and a laser scanning controller (55) for controlling the laser scanning units (60, 70, 80, 90) according to signals output from the photodetectors (64, 74, 84, 94). Also, the method for calculating scanning synchronization data for the printer includes the steps of a) adjusting the driving of the laser scanning units (50, 70, 80, 90) while circulating the photoreceptor belt (54), so that the beams emitted from the laser scanning units (60, 70, 80, 90) arrive at the photoreceptor belt (54) parallel to the travelling direction of the photoreceptor belt (54), b) calculating distances among scanning lines formed on the photoreceptor belt (54) by the beams irradiated from the laser scanning units (60, 70, 80, 90), from information on the timings at which the signals sequentially output from the photodetectors (64, 74, 84, 94) receiving the beams emitted from the laser scanning units (60, 70, 80, 90) whose driving is adjusted in the step a) and having passed through the transparent window (53) moving at a predetermined speed, and c) calculating scanning synchronization data for sequentially starting the laser scanning from the laser scanning units (60, 70, 80, 90) onto the same region of the circulating photoreceptor belt (54) with respect to the picture data for the respective colours of the identical page, from the distances among the scanning lines. Therefore, after mounting or replacing the respective laser scanning units (60, 70, 80, 90), necessary scanning synchronization data is internally calculated in the system and the simplicity of the system is enhanced.
Inventors:
KIN NANRYU
Application Number:
JP16248298A
Publication Date:
November 10, 1999
Filing Date:
June 10, 1998
Export Citation:
Assignee:
SANSEI DENSHI KK
International Classes:
B41J2/44; G02B26/10; G03G15/01; G03G21/14; H04N1/50; (IPC1-7): B41J2/44
Domestic Patent References:
| JP5119571A | ||||
| JP7239598A | ||||
| JP1086446A | ||||
| JP1086445A |
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)