(19)
(11) EP 0 716 925 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.04.1997 Bulletin 1997/16

(43) Date of publication A2:
19.06.1996 Bulletin 1996/25

(21) Application number: 95119708.6

(22) Date of filing: 14.12.1995
(51) International Patent Classification (IPC)6: B41J 2/045, B41J 2/14, B41J 2/16
(84) Designated Contracting States:
DE FR GB

(30) Priority: 14.12.1994 JP 310998/94

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

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

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

   


(54) Ink jet head and method for fabricating the same


(57) An ink jet head according to the present invention includes: a substrate; an orifice plate having an opening, the orifice plate facing the substrate; an element provided on the substrate so as to define an ink cavity provided between the substrate and the orifice plate, the ink cavity being filled with liquid ink, and so as to form a gap between at least a central portion of the element and the substrate, the element ejecting the liquid ink filled in the ink cavity through the opening of the orifice plate; a main ink supply groove provided on at least one of a surface of the substrate facing the orifice plate and a surface of the orifice plate facing the substrate; an ink supply path for connecting the ink cavity to the main ink supply groove; and a branch ink supply groove for connecting the gap between the element and the substrate to the main ink supplying groove.






Search report