Patent ID: 7832843
Filing Date: 2010-11-16
Classification: B41J

Abstract:
1. A liquid ejection head comprising: a plurality of ejection outlets for ejecting droplets; liquid flow paths in fluid communication with said ejection outlets; a liquid supply opening for supplying the liquid to said liquid flow paths, wherein said ejection outlets include first ejection outlets and second ejection outlets which are disposed at least at one side of said liquid supply opening, wherein said first ejection outlets are nearer to said liquid supply opening than said second ejection outlets, and said first ejection outlets and said second ejection outlets are arranged in a staggered fashion; first recording elements corresponding to said first ejection outlets; and second recording elements corresponding to said second ejection outlets, wherein each of said first recording elements comprises one heat generating resistor in the form of a rectangular shape having a long side extending along a direction crossing with an arranging direction of said ejection outlets, wherein each of said second recording elements comprises a plurality of heat generating resistors, each of which is in the form of a rectangular shape, and which are adjacent to each other at long sides thereof, said plurality of heat generating resistors forming each of said second recording elements being electrically connected in series, wherein wiring leads for supplying electric power to said first recording elements and said second recording elements are connected to short sides of said heat generating resistors, and wherein the number of said second recording elements comprising each of said second recording elements is two the long side of each of said heat generating resistors of comprising said first recording elements has a length which is about twice a length of the long side of each of said heat generating resistors comprising said second recording elements.