Patent ID: 6322191
Filing Date: 2001-11-27
Classification: B41J

Abstract:
A printing-position adjustment method for a printing apparatus having a first printing head and a second printing head, the printing-position adjustment method comprising:(a) printing stepped-deviation patterns, each with a different respective print deviation timing value varying from another of the stepped-deviation patterns by a step size, wherein the print deviation timing value represents a relative deviation of printing timings of the two printing heads, the stepped-deviation patterns defining a prior set of printed patterns; then(b) receiving a selection indicator corresponding to one of the prior set of printed patterns, and setting the respective print deviation timing value of the selected one of the prior set of printed patterns as a central value for a subsequent set of printed patterns;(c) printing the subsequent set of stepped-deviation patterns with a lowest respective print deviation timing value and a highest respective print deviation timing value being based on the central value, the subsequent stepped-deviation patterns, after printing, defining the prior set of printed patterns;(d) until an end of adjustment indication is received, repeating the steps (b) and (c).