Patent ID: 8168250
Filing Date: 2012-05-01
Classification: B41J

Abstract:
1. An ejection rate measurement method for a device having first, second, third, fourth, fifth, and sixth droplet ejection head columns, and two of the first through sixth droplet ejection head columns are mounted in pairs on first, second, and third carriages, respectively and in this order, comprising: (a) measuring an ejection rate of liquid ejected from droplet ejection heads included in the second and third droplet ejection head columns sandwiched between the first and fourth droplet ejection head columns; (b) sandwiching, after the step (a), the fourth and fifth droplet ejection head columns, which have not been sandwiched in the step (a), between the third and sixth droplet ejection head columns; and (c) measuring an ejection rate of liquid ejected from droplet ejection heads included in the fourth and fifth droplet ejection head columns sandwiched in the step (b).