The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2012
Filed:
Jan. 05, 2009
Applicant:
Takahisa Yamada, Hachioji, JP;
Inventor:
Takahisa Yamada, Hachioji, JP;
Assignee:
Riso Kagaku Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/195 (2006.01); B41J 2/19 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image forming apparatus which ejects ink to form an image on a recording medium flows the ink from an upstream side tank to a downstream side tank on an ink circulation path, includes a sensor for detecting a parameter corresponding to variations in amount of the ink in the downstream side tank, and confirms ink circulation in accordance with an amount of ink which returns through circulation from an appropriate amount of ink and a measured time.