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. 17, 2002
Filed:
Sep. 15, 2000
Mark Rietbergen, Roermond, NL;
Oce Technologies B.V., MA Venlo, NL;
Abstract
A print head for an inkjet printer with n interlacing passes. The print head is provided with a number of regular nozzles disposed in a row. The row has a first end and a second end, each formed by an associated regular nozzle. Neighboring regular nozzles are spaced apart by a regular nozzle pitch N, where N=n*ds, where ds is the dot pitch. A reserve nozzle is disposed at a distance from at least one of the ends of the row and in extension of the row. The distance between the reserve nozzle and the associated end of the row is I*ds, where I is an integer and is unequal to (p/k)*n where p is an integer, and k is an integer less than n. A method of printing an image built up from a number of sub-images, wherein neighboring sub-images are spaced apart by a dot pitch ds. The method in which the inventive print head is used comprises performing a number of printing passes of the print head to form the number of sub-images. Also, the position of a defective regular nozzle is detected before and during a first printing pass respectively. The print head is displaced over a distance between a preceding and a following printing pass, such that the reserve nozzle during the following printing pass comes into the position occupied by the defective nozzle in the preceding printing pass.