Liquid-discharge-failure detecting apparatus and inkjet...

Details Liquid-discharge-failure detecting apparatus and inkjet... Liquid-discharge-failure detecting apparatus and inkjet...

2008-11-05

2010-12-07

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

07845752

ABSTRACT:
A liquid-discharge-failure detecting apparatus includes a light-emitting unit, a light-receiving unit, and a light-trapping unit. The light-emitting unit emits a detection beam. The light-receiving unit is located at a position offset from an optical axis of the detection beam, and receives a scattered light generated by scattering of the detection beam by a droplet of ink (liquid). The light-trapping unit traps a detection beam that travels straight without striking the droplet so that the detection beam does not enter the light-receiving unit as a stray light.

REFERENCES:
patent: 6897466 (2005-05-01), Teramae et al.
patent: 1 364 796 (2003-11-01), None
patent: 1 498 274 (2005-01-01), None
patent: 2006-007447 (2006-01-01), None
U.S. Appl. No. 12/277,093, filed Nov. 24, 2008, Hayashi et al.

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