System and method of printhead calibration with reduced number of active inkjets

Patent metadata

Field	Value
Publication number	US-9067445-B2
Application number	US-201314029509-A
Country	US
Kind code	B2
Filing date	Sep 17, 2013
Priority date	Sep 17, 2013
Publication date	Jun 30, 2015
Grant date	Jun 30, 2015

Abstract

A method for printhead location identification includes identifying a plurality of amplitudes for a portion of pixel columns in image data generated from a portion of an image receiving surface in which marks formed by an inkjet in the printhead are printed. The amplitudes are generated from a portion of each pixel column including expected locations for a portion of the printed marks in a process direction. The method further includes identifying a cross-process location of the inkjet from a pixel column corresponding to a pixel column with a maximum local amplitude value and storing the location of the inkjet in a memory for printhead registration.

First claim

What is claimed is:

1. A method for calibrating a printhead in a printer comprising:
operating a printhead with a controller to eject a plurality of ink drops from an inkjet in a printhead to form a plurality of marks on an image receiving surface of a print medium moving past the printhead in a process direction, each mark extending in the process direction on the image receiving surface;
generating with an optical sensor image data of a predetermined portion of the image recei…

Assignees

• Xerox Corp

Inventors

• Donaldson Patricia J

Classifications

• B41J29/393 Primary

  Operations & Transport · mapped topic

• B41J2/2142 Primary

  Operations & Transport · mapped topic

• B41J2/2146

  Operations & Transport · mapped topic