Patent ID: 8888239
Filing Date: 2014-11-18
Classification: B41J

Abstract:
1. An inkjet printer comprising: a head assembly for ejecting fine droplets of ink; and a conveying mechanism for causing a base material and said head assembly to move relative to each other in a predetermined movement direction, wherein said head assembly includes: a first ejection head having outlets arranged in an arrangement direction that intersects said movement direction; and a second ejection head having outlets arranged in said arrangement direction and being disposed at a position that is different from a position of said first ejection head in said movement direction and that is shifted from said first ejection head in said arrangement direction, said first ejection head includes: a first densely arranged portion in which outlets are arranged at a predetermined arrangement pitch in said arrangement direction; and a first sparsely arranged portion disposed adjacent to said first densely arranged portion on one side in said arrangement direction and in which outlets are more sparsely arranged in said arrangement direction than in said first densely arranged portion, said second ejection head includes: a second densely arranged portion in which outlets are arranged at said arrangement pitch in said arrangement direction; and a second sparsely arranged portion disposed adjacent to said second densely arranged portion on the other side in said arrangement direction and in which outlets are more sparsely arranged in said arrangement direction than in said second densely arranged portion, said first sparsely arranged portion entirely overlaps in said movement direction with said second densely arranged portion, said second sparsely arranged portion entirely overlaps in said movement direction with said first densely arranged portion, said outlets of said first sparsely arranged portion include a use outlet that is used in recording an image onto said base material, and among said outlets of said second densely arranged portion, an outlet that overlaps in said movement direction with said use outlet of said first sparsely arranged portion is a non-use outlet that is not used in recording an image onto said base material.