Correcting in-track errors in a linear printhead

#Reference is made to commonly assigned, co-pending U.S. patent application Ser. No. 16/417,731, entitled: “Correcting cross-track errors in a linear printhead”, by Kuo et al.; to commonly assigned, co-pending U.S. patent application Ser. No. 16/417,763, entitled: “Printer with cross-track position error correction”, by Kuo et al.; and to commonly assigned, co-pending U.S. patent application Ser. No. 16/564,255, entitled: “Printer with in-track position error correction”, by Kuo et al., each of which is incorporated herein by reference.

#This invention pertains to the field of digital printing, and more particularly to a method for calibrating a printer including a linear printhead to compensate for in-track registration errors.

#Electrophotography is a useful process for printing images on a receiver (or “imaging substrate”), such as a piece or sheet of paper or another planar medium (e.g., glass, fabric, metal, or other objects) as will be described below. In this process, an electrostatic latent image is formed on a photoreceptor by uniformly charging the photoreceptor and then discharging selected areas of the uniform charge to yield an electrostatic charge pattern corresponding to the desired image (i.e., a “latent image”).

#FIG. 1 is an elevational cross-section of an electrophotographic printer suitable for use with various embodiments;

#FIG. 2 is an elevational cross-section of one printing subsystem of the electrophotographic printer of FIG. 1;

#FIG. 3 shows a conventional processing path for producing a printed image using a pre-processing system couple to a print engine;

#It is to be understood that the attached drawings are for purposes of illustrating the concepts of the invention and may not be to scale. Identical reference numerals have been used, where possible, to designate identical features that are common to the figures.

#The invention is inclusive of combinations of the embodiments described herein. References to “a particular embodiment” and the like refer to features that are present in at least one embodiment of the invention. Separate references to “an embodiment” or “particular embodiments” or the like do not necessarily refer to the same embodiment or embodiments; however, such embodiments are not mutually exclusive, unless so indicated, or as are readily apparent to one of skill in the art. The use of singular or plural in referring to the “method” or “methods” and the like is not limiting. It should be noted that, unless otherwise explicitly noted or required by context, the word “or” is used in this disclosure in a non-exclusive sense.

#As used herein, the terms “parallel” and “perpendicular” have a tolerance of ±10°.