(19)
(11) EP 0 822 075 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.12.1998 Bulletin 1998/53

(43) Date of publication A2:
04.02.1998 Bulletin 1998/06

(21) Application number: 97113252.7

(22) Date of filing: 31.07.1997
(51) International Patent Classification (IPC)6: B41J 2/06
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV RO SI

(30) Priority: 31.07.1996 JP 201760/96
31.07.1996 JP 202364/96

(71) Applicant: NEC CORPORATION
Tokyo (JP)

(72) Inventors:
  • Shima, Kazuo
    Kashiwazaki-shi, Niigata (JP)
  • Suetsugu, Junichi
    Kashiwazaki-shi, Niigata (JP)
  • Uematsu, Ryosuke
    Kashiwazaki-shi, Niigata (JP)
  • Mizoguchi, Tadashi
    Kashiwazaki-shi, Niigata (JP)
  • Minemoto, Hitoshi
    Kashiwazaki-shi, Niigata (JP)
  • Takemoto, Hitoshi
    Kashiwazaki-shi, Niigata (JP)
  • Hagiwara, Yoshihiro
    Kashiwazaki-shi, Niigata (JP)
  • Yakushiji, Toru
    Kashiwazaki-shi, Niigata (JP)

(74) Representative: VOSSIUS & PARTNER 
Siebertstrasse 4
81675 München
81675 München (DE)

   


(54) Electrostatic ink jet recording head


(57) An electrostatic ink jet recording head ejects toner particles in liquid ink at a high rate operation and with a stabilized ink ejection. The head body of the ink jet recording head comprises a base plate, head substrate having a stripe protrusion and channel regions alternately arranged with a constant pitch for serving as meniscus elements, and an ejecting electrode disposed on the top surface of the protrusion. A stable ink meniscus can be formed in the channel region due to the capillary function of the channel region. The channel region can be formed by mechanical dicing or laser machining of the head substrate or a photolithography of a photosensitive layer formed on the head substrate.






Search report