Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2007-01-02
2007-01-02
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S573000, C250S574000, C250S577000, C250S227250, C073S29000R, C073S293000, C347S007000, C347S086000
Reexamination Certificate
active
11111430
ABSTRACT:
A content detecting apparatus uses a signal from a light-receiving part receiving light projected from a light emitting part to detect ink in an ink cartridge. The light-emitting part and the light-receiving part are arranged with differing optical axes. The ink cartridge has reflecting parts for reflecting projected light from the light-emitting part so the projected light reaches the light-receiving part when remaining content is present when the ink cartridge is properly set and with an inclined interface located in a path along which projected light from the light-emitting part reaches the light-receiving part, for switching between permeation and reflection according to the presence and/or absence of remaining content. The inclined interface is permeated along the path with projected light form the light-emitting part when remaining content is present and reflects projected light from the light-emitting part out of the path when remaining content is absent.
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Allen Stephone B.
Monbleau Davienne
Stroock & Stroock & Lavan LLP
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