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:
Nov. 13, 2018
Filed:
Jul. 01, 2011
Andrew L. Van Brocklin, Corvallis, OR (US);
Mark Hunter, Portland, OR (US);
Peter James Fricke, Corvallis, OR (US);
Adam L. Ghozeil, Corvallis, OR (US);
James Michael Gardner, Corvallis, OR (US);
Andrew L. Van Brocklin, Corvallis, OR (US);
Mark Hunter, Portland, OR (US);
Peter James Fricke, Corvallis, OR (US);
Adam L. Ghozeil, Corvallis, OR (US);
James Michael Gardner, Corvallis, OR (US);
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Houston, TX (US);
Abstract
An apparatus including an analog memory, a temperature sensor, a comparator, and a pulse circuit. The analog memory is charged to a reference voltage corresponding to a predetermined temperature of a printhead. The temperature sensor measures a thermal voltage of at least one of the plurality of local areas of the printhead. The comparator obtains a comparison result by comparing the reference voltage to the thermal voltage. The pulse circuit selectively transmits a series of warming pulses to the at least one of the plurality of local areas of the printhead based on the comparison result.