| US 7,575,305 B2 | ||
| Liquid ejection head having improved ejection performance | ||
| Fujio Akahane, Nagano (Japan); Nagamitsu Takashima, Nagano (Japan); Kazushige Hakeda, Nagano (Japan); Ryoji Uesugi, Nagano (Japan); and Yasunori Koike, Nagano (Japan) | ||
| Assigned to Seiko Epson Corporation, Tokyo (Japan) | ||
| Filed on May 21, 2007, as Appl. No. 11/751,449. | ||
| Application 11/751449 is a continuation of application No. 11/031353, filed on Jan. 10, 2005. | ||
| Application 11/031353 is a continuation in part of application No. PCT/JP02/08738, filed on Jul. 09, 2003. | ||
| Claims priority of application No. P2002-200087 (JP), filed on Jul. 09, 2002; and application No. P2002-227546 (JP), filed on Aug. 05, 2002. | ||
| Prior Publication US 2007/0216736 A1, Sep. 20, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B41J 2/045 (2006.01) | ||
| U.S. Cl. 347—68 [347/70] | 19 Claims |
| 1. A liquid ejection head, comprising:
at least one metal chamber formation plate forming groove-shaped recesses serving as pressure generation chambers and a communication
hole disposed at one end of each of the groove-shaped recesses; and
a nozzle plate formed with nozzle orifices are formed at positions corresponding to the respective communication holes, and
joined to the chamber formation plate
wherein an end portion, in a longitudinal direction, of each of the groove-shaped recesses is formed with a slant portion
and a formed surface that is continuous with the slant portion has an inclination angle that is different from an inclination
angle of the slant portion.
|