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A THERMAL INK JET PRINTER HAVING MULTIPLE PRINTHEADS ALIGNED CO-LINEARLY

IP.com Disclosure Number: IPCOM000027454D
Original Publication Date: 1997-Feb-28
Included in the Prior Art Database: 2004-Apr-08

Publishing Venue

Xerox Disclosure Journal

Abstract

To achieve a relatively high printing speed in a printing device employing thermal ink jet partial width printhead, a printing subsystem is composed of multiple printheads aligned co-linearly and spaced an equal distance apart, so that the actual scanning distance involved for each swath is a fraction of a page width. For example, in a 4-headed system printing a page width of 8 inches, each head would be spaced approximately 2.00 inches apart. Thus, the necessary scan distance of the printhead would be only 2.00 inches, if alignment and mechanical motion were perfect. Since tolerances in printhead location would create image gaps or unwanted overlap in such a system, the printing assembly actually scans a distance greater than 2.00 inches, such as 2.5 inches and the image is interleaved in order to blend in the joint between adjacent printheads.