| US 7,591,537 B2 | ||
| Ink jet recording head | ||
| Ken Tsuchii, Sagamihara (Japan); Mineo Kaneko, Tokyo (Japan); Toru Yamane, Yokohama (Japan); Masaki Oikawa, Inagi (Japan); Keiji Tomizawa, Yokohama (Japan); Mitsuhiro Matsumoto, Yokohama (Japan); Shuichi Ide, Tokyo (Japan); and Kansui Takino, Kawasaki (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Jul. 06, 2007, as Appl. No. 11/774,104. | ||
| Claims priority of application No. 2006-190281 (JP), filed on Jul. 11, 2006. | ||
| Prior Publication US 2008/0012898 A1, Jan. 17, 2008 | ||
| Int. Cl. B41J 2/205 (2006.01) | ||
| U.S. Cl. 347—43 [347/40] | 10 Claims |
| 1. An ink jet head movable in a main scan direction, comprising:
a first group of ejection outlet arrays disposed at one side of a common liquid chamber and including a first ejection outlet
array and a second ejection outlet array disposed adjacent to said first ejection outlet array, wherein amounts of liquid
ejection of ejection outlets of said first ejection outlet array and amounts of liquid ejection of ejection outlets of said
second ejection outlet array are different from each other, and said ejection outlets of said first ejection outlet array
and said ejection outlets of said second ejection outlet array are disposed in a staggered arrangement;
a second group of ejection outlet arrays disposed at the other side of the common liquid chamber and including a common ejection
amount ejection outlet array having ejection outlets for ejecting an amount of the liquid which is the same as one of the
amounts of liquid ejection of said ejection outlets of said first ejection outlet array and said second ejection outlet array
and including a non-common ejection amount ejection outlet array disposed adjacent to said common ejection amount ejection
outlet array and having ejection outlets for ejecting an amount of the liquid which is different from the amounts of liquid
ejection of said ejection outlets of said first ejection outlet array group, wherein said ejection outlets of said common
ejection amount ejection outlet array and ejection outlets of said non-common ejection amount ejection outlet array are disposed
in a staggered arrangement;
a plurality of sets each comprising said first ejection outlet array group and said second ejection outlet array group, wherein
said sets are provided for each of at least cyan and magenta colors, respectively;
wherein said ejection outlets of said second ejection outlet array group are disposed with deviation of ½ of an interval at
which said ejection outlets of said first ejection outlet array group are arranged, relative to said ejection outlets of said
first ejection outlet array group,
wherein in said non-common ejection amount ejection outlet arrays in different ones of sets for the same color, are disposed
with deviation of ½ of an interval at which said ejection outlets of said non-common ejection amount ejection outlet arrays
in said different ones of sets are arranged.
|