Patent ID: 8668316
Filing Date: 2014-03-11
Classification: B41J

Abstract:
1. A liquid ejection head comprising: a recording element substrate having supply ports for supplying liquid internally and adapted to apply heat to the liquid supplied from the supply ports and eject the liquid; a supporting member having a supporting surface for supporting the recording element substrate and supply flow paths communicating with the supply ports and running through the supporting member from the supporting surface to a surface opposite to the supporting surface, the recording element substrate being so disposed as to stride over openings of the supply flow paths; and at least two beams arranged in each of the supply flow paths and held in contact with the recording element substrate, the supporting member having at least three supply flow paths, the openings of the at least three supply flow paths being aligned in a first direction running along the supporting surface, the at least two beams arranged in each of the at least three supply flow paths being separated from each other by a gap as viewed in a second direction intersecting the first direction and running along the supporting surface, the gap separating in the second direction the at least two beams arranged in each of end supply flow paths disposed at the ends as viewed in the first direction among the at least three supply flow paths being greater than the gap separating in the second direction the at least two beams arranged in a central supply flow path disposed between the end supply flow paths as viewed in the first direction.