Patent ID: 7322394
Filing Date: 2008-01-29
Classification: B41J

Abstract:
1. An apparatus for assembling a head unit in a state in which a plurality of liquid droplet ejection heads respectively held by a head holding member are provisionally mounted on a single upside-down carriage so as to be suspended therefrom with a nozzle forming surface facing upward, said liquid droplet ejection heads being subsequently fixed to said carriage after alignment, said apparatus comprising: recognition means for image-wise recognizing a position of said carriage and a position of each of said liquid droplet ejection heads; moving means for holding said carriage and moving said carriage in X-•Y-•Θ-axis directions; correction means for engaging with said head holding member and slightly moving said head holding member in the X-•Y-•Θ-axis directions; fixing means for fixing said head holding member to said carriage; and control means for controlling said recognition means, said moving means, said correction means, and said fixing means, wherein said control means: the recognition of the position of said carriage is performed by image-wise recognition by said recognition means of two standard marks provided in said carriage at a distance from each other, and said recognition means has a recognition camera for taking said two standard marks respectively into a scope of view by a relative movement in one of X-axis direction and Y-axis direction relative to said carriage.