Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2005-04-12
2009-12-29
Pham, Hai C (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S259000
Reexamination Certificate
active
07639274
ABSTRACT:
In an image forming apparatus including plural exposure units each deflecting a light beam from a light source by means of an oscillation mirror in resonant oscillations and scanning the deflected light beam on a latent image carrier thereby forming a latent image on the latent image carrier, every one of the exposure units assuredly attains an adequate amplitude of the oscillation mirror for ensuring the formation of images of high quality. More specifically, a CPU101retrieves resonant frequencies of individual deflectors previously stored in a memory. The CPU101calculates an average value of these resonant frequencies and applies a drive command to mirror drivers1022of the exposure units6Y,6M,6C,6K such as to drive all the deflectors into oscillations at the average value. Alternatively, a resonant-frequency adjusting section653makes adjustment to match the resonant frequencies of the individual deflectors substantially with a drive frequency. This ensures that all the oscillation mirrors attain adequate amplitudes.
REFERENCES:
patent: 6956597 (2005-10-01), Bush et al.
patent: 7233343 (2007-06-01), Turner et al.
patent: 2002/0122217 (2002-09-01), Nakajima
patent: 2003/0072066 (2003-04-01), Hayashi et al.
patent: 2003/0227538 (2003-12-01), Fujii et al.
patent: 2004/0036936 (2004-02-01), Nakajima et al.
patent: 01-302317 (1989-12-01), None
patent: 09197334 (1997-07-01), None
patent: 09240060 (1997-09-01), None
patent: 2001013417 (2001-01-01), None
patent: 2004-053943 (2004-02-01), None
patent: 2004-191416 (2004-07-01), None
patent: 2005-031238 (2005-02-01), None
European Search Report for corresponding European application No. 05008545.5-2217 lists the reference above.
Ikuma Ken
Nomura Yujiro
Hogan & Hartson LLP
Pham Hai C
Seiko Epson Corporation
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