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:
Apr. 23, 1996
Filed:
Oct. 29, 1993
Thomas W Linder, Corvallis, OR (US);
John Dion, Corvallis, OR (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
In order to optimize print quality, it is desirable to minimize the distance between a inkjet printhead and the media that is being printed on. This reduces print quality degradation by stray drops of ink with different trajectories than the main drop and errors in the nominal trajectory of the main drop. Color inkjet printers commonly employ a plurality of print cartridges, usually either two or four, mounted in the printer carriage to produce a full spectrum of colors. In a multiple printhead printer, it is advantageous if the black print cartridge is closer to the print media when printing text than is the color cartridge when printing color graphics. The apparatus and method of this disclosure enables the black printhead in an inkjet printer with both black and color cartridges to be as close to the media as possible so that black text print quality will be optimized while also allowing the printing of color graphics. Since black text print quality is more sensitive to printhead-to-media distance than is color graphics quality, the overall print quality of both black text and color graphics is optimized.