Patent ID: 7118193
Filing Date: 2006-10-10
Classification: B41J

Abstract:
1. A liquid ejection recording head for effecting recording while scanning a recording material bi-directionally, said liquid ejection recording head comprising: first, second and third liquid supply openings provided in a common substrate in the order named in a given direction; a first ejection outlet array including a plurality of ejection outlets in fluid communication with said second liquid supply opening, said first ejection outlet array being disposed on a side of said second liquid supply opening facing away from the direction; a second ejection outlet array including a plurality of ejection outlets in fluid communication with said first liquid supply opening, said second ejection outlet array being disposed on a side of said first liquid supply opening; a third ejection outlet array including a plurality of ejection outlets in fluid communication with said second liquid supply opening, said third ejection outlet array being disposed on a side of said second liquid supply opening facing the direction; a fourth ejection outlet array including a plurality of ejection outlets in fluid communication with said third liquid supply opening, said fourth ejection outlet array being disposed on a side of said third liquid supply opening; wherein the ejection outlets of said first ejection outlet array and the ejection outlets of said second ejection outlet array are aligned with each other with respect to the direction; wherein the ejection outlets of said third ejection outlet array and the ejection outlets of said fourth ejection outlet array are aligned with each other with respect to the direction; wherein the ejection outlets of said first ejection outlet array and the ejection outlets of said third ejection outlet array are offset from each other with respect to the direction so as to supplement each other with respect to a direction in which the ejection outlets are arranged; and wherein the same kind of liquid is supplied through said first liquid supply opening and said third liquid supply opening.