(19)
(11) EP 0 987 111 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.04.2000 Bulletin 2000/15

(43) Date of publication A2:
22.03.2000 Bulletin 2000/12

(21) Application number: 99124227.2

(22) Date of filing: 08.11.1996
(51) International Patent Classification (IPC)7: B41J 2/14
(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: 10.11.1995 JP 31722495
27.09.1996 JP 27709596

(62) Application number of the earlier application in accordance with Art. 76 EPC:
96117927.2 / 0773108

(71) Applicant: SEIKO EPSON CORPORATION
Shinjuku-ku, Tokyo (JP)

(72) Inventors:
  • Usui, Minoru, c/oSeiko Epson Corporation
    Suwa-shi, Nagano (JP)
  • Katakura, Takahiro, c/o Seiko Epson Corporation
    Suwa-shi, Nagano (JP)
  • Kanaya, Munehide, c/o Seiko Epson Corporation
    Suwa-shi, Nagano (JP)

(74) Representative: Diehl, Hermann, Dr. et al
DIEHL, GLÄSER, HILTL & PARTNER, Augustenstrasse 46
80333 München
80333 München (DE)

   


(54) Actuator unit


(57) The invention relates to an actuator unit, especially for use in an ink jet type recording head. The actuator unit comprises a plurality of pressure generating means and a plurality of pressure generating chambers (2, 3) for pressurizing ink through actuation of said pressure generating means. The pressure generating chambers (2, 3) are arranged in line along an arrangement direction (A-A, B-B) and are inclined at an angle θ with respect to the arrangement direction (A-A, B-B) with the angle θ having a value other than 90°. Further, the actuator unit advantageously comprises a spacer (1), a diaphragm, a cover sheet and an ink feed passage composing sheet. Outer walls (1a, 1b) of a spacer 1 of the actuator unit are also preferably inclined at an angle θ with respect to the arrangement lines A-A, B-B of pressure generating chambers (2, 3).






Search report