Optical detector able to sense the presence of a container...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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Details

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.

REFERENCES:
patent: 4878383 (1989-11-01), Wiegand et al.
patent: 6137503 (2000-10-01), Hashimoto et al.
patent: 6361136 (2002-03-01), Watanabe et al.
patent: 6626510 (2003-09-01), Maeda
patent: 6705715 (2004-03-01), Morita et al.
patent: 7040728 (2006-05-01), Merz et al.
patent: 2004/0232364 (2004-11-01), Omatoi
patent: 07-164626 (1995-06-01), None
patent: 10-230616 (1998-09-01), None

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