Patent ID: 7726762

Claim:
A printing method comprising the steps of: carrying a medium and ejecting ink from a print head to print, on said medium, a plurality of fill-in marks that can be filled in by a user; detecting, with a sensor, whether or not said fill-in marks have been filled in; and performing a process in accordance with a result of the detection by said sensor, wherein said sensor moves together with said print head, wherein said print head prints, on said medium, a position-adjustment mark, a bidirectional printing adjustment pattern including a plurality of ruled-line pairs, each ruled-line pair including a first ruled line formed during a forward movement of said print head and a second ruled line formed during a return movement of said print head, a distance between said first ruled line and said second ruled line being different among said ruled-line pairs, and said plurality of fill-in marks respectively corresponding to said plurality of ruled-line pairs, wherein said sensor detects said position-adjustment mark, wherein said sensor detects whether or not one of said fill-in marks has been filled in, in accordance with a result of detecting said position-adjustment mark, and wherein an ink ejection timing at which ink is to be ejected from said print head upon bidirectional printing is adjusted in accordance with a result of detecting said fill-in mark.