(19)
(11) EP 0 585 901 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.05.1995 Bulletin 1995/18

(43) Date of publication A2:
09.03.1994 Bulletin 1994/10

(21) Application number: 93113981.0

(22) Date of filing: 01.09.1993
(51) International Patent Classification (IPC)5: B41J 2/165, B41J 2/175
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 02.09.1992 JP 234669/92
25.09.1992 JP 280958/92
26.10.1992 JP 287572/92

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

(72) Inventors:
  • Koizumi, Yutaka, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Hirosawa, Toshiaki, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Moriyama, Jiro, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Osada, Torachika, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)

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


(56) References cited: : 
   
       


    (54) Ink jet apparatus provided with an improved recovery mechanism


    (57) An ink jet recording apparatus comprises a recording head (1) having a plurality of discharging ports (10) to discharge a recording liquid; capping means (8) capable of being mounted on the recording head; pressure means (7) to enable the recording liquid to flow under pressure in the ink supply passages to the recording head, and pressurize the interior of the recording head when the capping means is mounted; a first ink supply tube (8A) to conductively connect the pressure means and the recording head; a second ink supply tube (9B) to conductively connect the recording head (1) and a recording liquid reservoiring container (6); a conductive tube to conductively connect the first ink supply tube and the second ink supply tube; and control means to control the flow in the conductive tube, hence making it possible to remove air bubbles in the ink supply systems and ink passages easily and effectively by providing a conductive tube for the conventional ink supply systems.






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