(19)
(11) EP 0 774 355 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.11.1997 Bulletin 1997/47

(43) Date of publication A2:
21.05.1997 Bulletin 1997/21

(21) Application number: 97101749.6

(22) Date of filing: 10.02.1994
(51) International Patent Classification (IPC)6: B41J 2/14, B41J 2/045
(84) Designated Contracting States:
DE GB SE

(30) Priority: 10.02.1993 JP 22571/93

(62) Application number of the earlier application in accordance with Art. 76 EPC:
94300968.8 / 0611154

(71) Applicant: BROTHER KOGYO KABUSHIKI KAISHA
Nagoya-shi, Aichi-ken (JP)

(72) Inventor:
  • Zhang, Qiming, c/o Brother Kogyo K. K.
    Nagoya-shi, Aichi-ken (JP)

(74) Representative: Senior, Alan Murray 
J.A. KEMP & CO., 14 South Square, Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)

 
Remarks:
This application was filed on 05 - 02 - 1997 as a divisional application to the application mentioned under INID code 62.
 


(54) Ink jet apparatus


(57) An ink jet apparatus includes a plurality of ink chambers each having a front end and a rear end, a manifold provided to introduce ink into each ink chamber with a front side surface on a side near the front end of each ink chamber, and a nozzle provided at the front end of each ink chamber. Ink is jetted from the nozzle by applying pressure to the ink contained in each ink chamber. A position of the manifold is such that a distance between the front side surface of the manifold and the rear end of each ink chamber is set to 0.2mm or more, and a distance between the front side surface of the manifold and the nozzle is set to 3mm or more. Accordingly, pressure necessary for jetting ink droplets can be maintained for a relatively long period of time. Therefore, the ink can be smoothly introduced from the manifold into each ink chamber, thereby improving print quality.






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