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:
Jan. 07, 2014
Filed:
Jun. 08, 2009
Eric Nelson, San Diego, CA (US);
David Vejtasa, Poway, CA (US);
Alexander Karp, San Diego, CA (US);
Christopher S Tanner, San Diego, CA (US);
Eric Nelson, San Diego, CA (US);
David Vejtasa, Poway, CA (US);
Alexander Karp, San Diego, CA (US);
Christopher S Tanner, San Diego, CA (US);
Hewlett-Packard Development Company, L. P., Houston, TX (US);
Abstract
A developer unit usable with a liquid electrophotographic printing apparatus having a photosensitive drum includes a developer roller configured to receive ink, and to selectively engage and rotatably transfer the ink to the photosensitive drum, the developer roller configured to switch between a contact mode when the developer roller is rotating and a non-contact mode when the developer roller is not rotating, a squeegee roller selectively in contact with the developer roller, the squeegee roller configured to at least condense the received ink on the developer roller in the contact mode, and configured to be apart from the developer roller in the non-contact mode, and a cleaner roller selectively in contact with the developer roller, the cleaner roller configured to remove remaining ink from the developer roller not transferred to the photosensitive drum in the contact mode, and to be apart from the developer roller in the non-contact mode, wherein at least one of the squeegee roller, the cleaner roller and the developer roller are configured to move between the contact mode and the non-contact mode in response to a rotational state of the developer roller.