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. 14, 2015
Filed:
Nov. 21, 2011
Applicants:
Andrew Robert Lester, Cambridge, GB;
Adeyinka Opaleye, Cambridge, GB;
Matthew Henry Freeman, Cambridge, GB;
Inventors:
Andrew Robert Lester, Cambridge, GB;
Adeyinka Opaleye, Cambridge, GB;
Matthew Henry Freeman, Cambridge, GB;
Assignee:
Domino Printing Sciences PLC, , GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/195 (2006.01); B41J 2/175 (2006.01);
U.S. Cl.
CPC ...
B41J 2/17566 (2013.01); B41J 2/17513 (2013.01); B41J 2/17553 (2013.01);
Abstract
The invention provides a method and system for determining fluid levels in an inkjet printer. A non-contact sensor array is provided external to the container in which the levels are to be determined and each sensor in the array is sequentially switched into a sensing circuit until a change in capacitance is noted. The sensing circuit is preferably a frequency oscillation circuit whose frequency is defined by circuit capacitance.