Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2006-07-04
2006-07-04
Pham, Hai (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S234000
Reexamination Certificate
active
07071962
ABSTRACT:
An electrophotographic apparatus has a beam spot made to have a small spot diameter by the use of a laser having an oscillation wavelength within the range of from 380 nm to 450 nm, and enables image reproduction at ultra-high resolution and with ultra-high image quality. The apparatus includes I) an electrophotographic photosensitive member unit having i) an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support and ii) fitting members fitted to the end portions of the electrophotographic photosensitive member, and II) an exposure device having a laser having an oscillation wavelength within the range of from 380 nm to 450 nm, and in which a spot diameter Di (μm) of a beam spot formed on the surface of the electrophotographic photosensitive member by a laser beam emitted from the laser is 40 μm or less, and the cylinder deflection De (μm) of the electrophotographic photosensitive member unit is 1.5 times or less the spot diameter Di (μm) of the beam spot.
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Fujii Atsushi
Higashi Ryuji
Tanaka Masato
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Pham Hai
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