Patent Number: 7,131,718

Title: Inkjet head and ejection device

Abstract: A housing of inkjet head has a projection that is formed with a plurality of opening grooves defined between adjacent two of projecting parts, and tip ends of the projecting parts are fixed to a diaphragm plate. Piezoelectric elements are inserted in respective opening grooves and fixed to a diaphragm of the diaphragm plate at positions opposite respective pressure chambers.

Inventors: Matsufuji; Ryouta (Hitachinaka, JP), Tobita; Satoru (Hitachinaka, JP), Akiyama; Yoshitaka (Hitachinaka, JP), Sumiya; Toshiharu (Hitachinaka, JP), Matsumoto; Yoshikane (Hitachinaka, JP)

Assignee: Ricoh Printing Systems, Ltd.

International Classification: B41J 2/045 (20060101)

Expiration Date: 2019-11-07 0:00:00