(19)
(11) EP 0 829 359 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.03.1999 Bulletin 1999/10

(43) Date of publication A2:
18.03.1998 Bulletin 1998/12

(21) Application number: 97115021.4

(22) Date of filing: 29.08.1997
(51) International Patent Classification (IPC)6: B41J 2/14, B41J 2/165
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 30.08.1996 JP 230445/96
30.08.1996 JP 230447/96
02.05.1997 JP 114756/97

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Yamanaka, Akihiro
    Ohta-ku, Tokyo (JP)
  • Masuda, Kazuaki
    Ohta-ku, Tokyo (JP)
  • Yamamoto, Hajime
    Ohta-ku, Tokyo (JP)
  • Shimizu, Eiichiro
    Ohta-ku, Tokyo (JP)
  • Kotaki, Yasuo
    Ohta-ku, Tokyo (JP)
  • Arashima, Teruo
    Ohta-ku, Tokyo (JP)
  • Hinami, Jun
    Ohta-ku, Tokyo (JP)
  • Takahashi, Wataru
    Ohta-ku, Tokyo (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)

   


(54) Ink jet recording head and ink jet recording apparatus having such head


(57) The present invention provides an ink jet recording head comprising a top plate in which two groups of ink passage grooves for forming ink passages, two ink chamber frames, ink introduction passages, two rows of ink discharge ports are formed, two substrates on which a plurality of resistive heat generating elements for discharging ink are formed in correspondence to the two rows of ink discharge ports, and two elastic members for contacting under pressure and securing the substrates and the top plate for each said substrate, and wherein the junction between the substrates and the top plate forms the ink passages and the ink chambers therebetween, and further wherein a groove for isolating the ink discharge port rows from each other is formed between the ink discharge port rows and a depth of the groove is greater than depths of the ink discharge ports and the ink passages.






Search report