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. 23, 2010
Filed:
Mar. 21, 2007
Brian Robert Brown, Balmain, AU;
Norman Micheal Berry, Balmain, AU;
Garry Raymond Jackson, Balmain, AU;
Paul Timothy Sharp, Balmain, AU;
John Douglas Peter Morgan, Balmain, AU;
Kia Silverbrook, Balmain, AU;
Akira Nakazawa, Balmain, AU;
Michael John Hudson, Balmain, AU;
Christopher Hibbard, Balmain, AU;
Samuel George Mallinson, Balmain, AU;
Paul Justin Reichl, Balmain, AU;
Brian Robert Brown, Balmain, AU;
Norman Micheal Berry, Balmain, AU;
Garry Raymond Jackson, Balmain, AU;
Paul Timothy Sharp, Balmain, AU;
John Douglas Peter Morgan, Balmain, AU;
Kia Silverbrook, Balmain, AU;
Akira Nakazawa, Balmain, AU;
Michael John Hudson, Balmain, AU;
Christopher Hibbard, Balmain, AU;
Samuel George Mallinson, Balmain, AU;
Paul Justin Reichl, Balmain, AU;
Silverbrook Research Pty Ltd, Balmain, New South Wales, AU;
Abstract
A printhead for an inkjet printer that has a printhead integrated circuit () with nozzles for ejecting ink and a support structure () for supporting the printhead IC. The support structure having ink conduits () for supplying the array of nozzles. A plurality of cavities (), each cavity having an opening that establishes fluid communication with the ink conduits, the openings being configured such that the cavities do not prime with ink when the ink conduits are primed from the ink supply. By leaving unprimed cavities throughout the support structure, any pressure pulses in the ink are damped by compression of the trapped gas pockets. Distributing the cavities rather than using one relatively large cavity, means that the pressure pulse is being damped along the length of the printhead IC, instead of allowing the pulse to travel the length of the ink conduit until it reaches the single damper and compresses the gas.