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:
Oct. 03, 1995
Filed:
May. 03, 1993
W Wistar Rhoads, Escondido, CA (US);
Lance Cleveland, San Diego, CA (US);
Abdolreza Movaghar, San Diego, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
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 order to optimize print quality, it is desirable to minimize the distance between a thermal inkjet printhead and the media that is being printed on. In a multiple printhead printer only one printhead can be the closest one to the media due to the various mechanical tolerances of the printer. 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 by assuring that the black print cartridge is closest to the media. Disclosed is a method for determining the relevant tolerances affecting printhead-to-media distance, analyzing the tolerance values to determine the range of tolerances and the greatest variation between one print cartridge and another, such that a determined percentage of the sampled print cartridges fall within this variation. This value is then used to offset the black print cartridge carriage slot so that the black print cartridge will be closest to the media.