Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2006-08-08
2006-08-08
Pham, Hai (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S248000
Reexamination Certificate
active
07088381
ABSTRACT:
A color image forming apparatus and laser pulse width adjustment method can shorten the time required for laser pulse width adjustment with low cost. In a color image forming apparatus in which a plurality of laser scanners scan and expose a plurality of photosensitive drums with laser beams pulse-width modulated according to image data, the scanner phases of the laser scanners in which no color misregistration occurs are recorded, the phases of the laser scanners are changed to a specific phase relationship for laser pulse width adjustment, laser pulse width adjustment is executed, and the phases of the laser scanners are then restored to the recorded scanner phases in which no color misregistration occurs.
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Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Pham Hai
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