Patent ID: 7997691
Filing Date: 2011-08-16
Classification: B41J

Abstract:
1. An ink jet print head comprising: a plurality of ejection opening columns, each of the plurality of ejection opening columns having a plurality of ejection openings for ejecting ink, and being arranged along a direction crossing an arrangement direction of the plurality of ejection openings; a flow path forming member having a major surface in which a plurality of ink paths are formed, a plurality of ink introduction holes, which correspond to a plurality of ink storage portions to introduce ink from the plurality of ink storage portions, being formed in the flow path forming member; and a plurality of ink supply ports for supplying ink to the plurality of ejection opening columns, each of the plurality of ink supply ports being provided so as to overlap with a corresponding one of the ejection opening columns, to which ink is supplied from the ink supply ports, in a direction perpendicular to the major surface, and each of the plurality of ink supply ports communicating with a corresponding one of the ink introduction holes through a corresponding one of the ink paths, wherein the plurality of ink introduction holes includes an ink introduction hole which communicates with a corresponding one of the ink supply ports through a corresponding one of the ink paths corresponding to two ejection opening columns of the plurality of ejection opening columns, and the plurality of ink introduction holes are arranged along the arrangement direction of the plurality of ejection openings.