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:
Jul. 07, 2009
Filed:
Sep. 30, 2005
Applicants:
David L. Knierim, Wilsonville, OR (US);
Ivan Mccracken, Portland, OR (US);
Inventors:
David L. Knierim, Wilsonville, OR (US);
Ivan McCracken, Portland, OR (US);
Assignee:
Xerox Corporation, Norwalk, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/195 (2006.01); B41J 29/38 (2006.01); B41J 25/308 (2006.01); B41J 29/393 (2006.01); G01F 23/00 (2006.01); G01F 23/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An ink level sensing system and method of sensing that includes a lower probe positioned in a lower portion of an ink reservoir, an upper probe positioned above the lower probe and extending upward to an upper portion of the ink reservoir, and an electrode positioned next to the lower and upper probes. An electrical signal is driven to the electrode and current flows are detected from the electrode to the lower and upper probes. The current flows to the lower and upper probes are compared to determine a level of ink in the ink reservoir.