(19)
(11) EP 0 713 774 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.04.1997 Bulletin 1997/14

(43) Date of publication A2:
29.05.1996 Bulletin 1996/22

(21) Application number: 95108400.3

(22) Date of filing: 31.05.1995
(51) International Patent Classification (IPC)6: B41J 2/05, B41J 29/377, B41J 29/16
(84) Designated Contracting States:
DE FR GB

(30) Priority: 24.11.1994 JP 290123/94

(71) Applicant: SHARP KABUSHIKI KAISHA
Osaka 545 (JP)

(72) Inventors:
  • Hirata, Susumu
    Ikoma-gun, Nara-ken (JP)
  • Matoba, Hirotsugu
    Sakurai-shi, Nara-ken (JP)
  • Inui, Tetsuya
    Nara-ken (JP)
  • Ishii, Yorishige
    Yamatotakada-shi, Nara-ken (JP)
  • Abe, Shingo
    Tenri-shi, Nara-ken (JP)
  • Kimura, Masaharu
    Daitou-shi, Osaka-fu (JP)
  • Horinaka, Hajime
    Kashiba-shi, Nara-ken (JP)
  • Onda, Hiroshi
    Yamatokooriyama-shi, Nara-ken (JP)

(74) Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER 
Mauerkircherstrasse 45
81679 München
81679 München (DE)

   


(54) Ink jet head for high speed printing and method for it's fabrication


(57) The invention provides an ink jet head which exhibits a good response characteristic through heating and fast cooling enough to implement high-speed printing. A nozzle plate (10) having a nozzle orifice (11), and a substrate (7) constitute part of a peripheral wall of an ink chamber (31). A pressure generating member (20) is provided in the ink chamber (31). The pressure generating member (20) has a buckling member (1), a heater layer (3), and a diaphragm (5). The buckling member (1) is formed into a generally plate shape and its peripheral portion is attached to the substrate (7). The buckling member (1) can be switched between a no-displacement state in which it undergoes substantially no thermal stress, and a buckled state in which it is thermally expanded and buckled. The heater layer (3) is provided along a surface of the buckling member (1) on the substrate (7) side. The diaphragm (5) is composed of a generally plate-shaped flexible material and provided along a surface of the buckling member (1) on the nozzle plate (10) side in such a state that at least its peripheral portion (5c) is attached to a peripheral portion (1c) of the buckling member (1).






Search report