Electrophotography – Diagnostics – Component present or mounted
Reexamination Certificate
2006-12-15
2010-10-05
Porta, David P (Department: 2884)
Electrophotography
Diagnostics
Component present or mounted
C399S027000, C399S028000, C399S119000
Reexamination Certificate
active
07809288
ABSTRACT:
In a color laser printer, four toner cartridges are juxtaposed in a straight line in a process unit. When the process unit is withdrawn from the laser printer to a position at which the toner cartridge nearest the front of the laser printer can be removed, an out-of-toner sensor farthest from the front of the laser printer from among four out-of-toner sensors turns on. Side surfaces of a unit-accommodating section constituting the process unit block detection light from the other three out-of-toner sensors so that these out-of-toner sensors remain off. Since the farthest out-of-toner sensor switches from off to on, the CPU determines that the process unit has been withdrawn to a position at which the nearest toner cartridge can be removed.
REFERENCES:
patent: 2003/0053819 (2003-03-01), Nomura et al.
patent: 2004/0264984 (2004-12-01), Yabuki et al.
patent: 6-317958 (1994-11-01), None
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patent: 2002-221843 (2002-08-01), None
patent: 2004-309999 (2004-11-01), None
Banner & Witcoff , Ltd.
Brother Kogyo Kabushiki Kaisha
Porta David P
Ready Bryan P
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