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:
Sep. 18, 2001
Filed:
Oct. 29, 1999
John M Wade, Poway, CA (US);
George H Corrigan, III, Corvallis, OR (US);
Glenn T Haddick, San Diego, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An interconnection arrangement for an inkjet printing system having multiple power pads, each of which provides power for driving a large number of printhead ink ejection elements. The ink ejection elements of a print cartridge are organized into groups, with power provided to each group by one of the power pads. The firing pulse width of each group is independently set to compensate for the parasitic electrical resistances in the power path of each ink ejection group in the print cartridge so as to eject ink drops of uniform volume required for high quality printed output. In order to transmit the relatively high current levels required to fire a large number of ink ejection elements from a single group at the same time, the interconnection scheme provides multiple bump-and-dimple interconnections with the printer for each power and ground pad on the print cartridge.