Claims
- 1. At least one ink head in an ink jet printer which forms an image by jetting an ink droplet toward a recording medium and adhering the ink droplet on the recording medium, the ink head comprising:
a) ink chambers arranged at predetermined intervals; b) jetting energy elements provided in said ink chambers, the jetting energy elements applying a jetting energy to ink in the ink chambers; and c) nozzles provided so as to communicate with said ink chambers, a plurality of the nozzles being provided for each ink chamber, each of the plurality of nozzles having a rear-surface-opening which opens in said ink chamber, the rear surface-opening being oval-shaped, each of the plurality of nozzles being formed such that a minor axial direction of the oval-shaped rear-surface-opening is parallel to the minor axial direction of a nozzle adjacent thereto, and the rear-surface-openings of the nozzles in each ink chamber being arranged so as not to overlap with each other and being separate from each other.
- 2. The ink head according to claim 1, wherein said ink chamber has two pairs of side walls opposing each other, and one pair of side walls of the two pairs of side walls is configured so as to be narrower in the interval between one pair of side walls than the other pair of side walls, and each nozzle is arranged so that the minor axial direction of the rear-surface-opening coincides with a side wall arrangement direction of the one pair of side walls.
- 3. The ink head according to claim 2, wherein any one pair of the two pairs of side walls being provided with the jetting energy elements.
- 4. The ink head according to claim 3, wherein the jetting energy elements comprise a piezoelectric driving element.
- 5. The ink head according to claim 4, wherein the rear-surface-opening of each nozzle is separated from any one pair of the two pairs of side walls provided with the piezoelectric driving elements.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2001-102329 |
Mar 2001 |
JP |
|
2001-276922 |
Sep 2001 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation of U.S. application Ser. No. 10/108,143 filed Mar. 27, 2002, which application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2001-102329, filed Mar. 30, 2001, and Japanese Patent Application No. 2001-276922, filed Sep. 12, 2001, the entire contents of both of which are incorporated herein by reference.
Continuations (1)
|
Number |
Date |
Country |
Parent |
10108143 |
Mar 2002 |
US |
Child |
10831402 |
Apr 2004 |
US |