Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hirotaka Hayashi0
Kazumasa Ito0
Date of Patent
December 7, 2010
0Patent Application Number
122653550
Date Filed
November 5, 2008
0Patent Primary Examiner
Patent 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.
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