(19)
(11) EP 0 525 988 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.02.1993 Bulletin 1993/08

(43) Date of publication A2:
03.02.1993 Bulletin 1993/05

(21) Application number: 92306013.1

(22) Date of filing: 30.06.1992
(51) International Patent Classification (IPC)5: B41J 2/165
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE

(30) Priority: 17.07.1991 JP 176791/91

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

(72) Inventor:
  • Nakamura, Fumiharu, c/o Canon Kabushiki Kaisha
    Ohta-Ku, Tokyo (JP)

(74) Representative: Beresford, Keith Denis Lewis et al
BERESFORD & Co. 2-5 Warwick Court High Holborn
London WC1R 5DJ
London WC1R 5DJ (GB)


(56) References cited: : 
   
       


    (54) Ink jet recording apparatus


    (57) An ink jet recording apparatus which performs recording by using a recording head which performs recording by discharging ink from discharging orifices to a recording medium, comprises: a recovering unit for executing a recovery operation for recovering the recording head from a defective ink discharging state; an instruction switch for instructing the recovering unit to execute the recovery operation; and a recovery operation controller, responsive to an instruction to execute the next recovery operation which is generated after the recovery operation has been executed by the recovering unit, for controlling the recovering unit to execute the next recovery operation which provides a larger recovery amount than that of the first recovery operation on the basis of a state of the recording head from a time at which the first recovery operation was completed to a time at which the instruction is issued to the recovering unit to execute the next recovery operation.






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