Discharge recovery method for an ink jet recording head and device for carrying out the same

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(11)

EP 0 670 223 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.05.1996 Bulletin 1996/19

(43)	Date of publication A2:
	06.09.1995 Bulletin 1995/36

(21)	Application number: 95200807.6

(22)	Date of filing: 10.04.1991

(51)	International Patent Classification (IPC)⁶: B41J 2/165

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB GR IT LI LU NL SE

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Priority:

11.04.1990 JP 95406/90

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	91303184.5 / 0452119

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

(72)	Inventors:
	Koitabashi, Norifumi, c/o Canon K.K. Tokyo (JP) Sugimoto, Hitoshi, c/o Canon K.K. Tokyo (JP) Tajika, Hiroshi, c/o Canon K.K. Tokyo (JP) Matsubara, Miyuki, c/o Canon K.K. Tokyo (JP) Arai, Atsushi, c/o Canon K.K. 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)

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References cited: :


	Remarks:
	This application was filed on 30 - 03 - 1995 as a divisional application to the application mentioned under INID code 60.

(54)	Discharge recovery method for an ink jet recording head and device for carrying out the same

(57) This invention provides a novel and effective recovery method and device for an ink jet recording head, which method or device has the step of or means for carrying out substantially at a time a condition for driving discharge energy generating elements to discharge ink from the discharge ports of the head and a condition for effecting the forced discharge of the ink by a suction or pressing pump. According to the present invention, the pump itself can be made compact and moreover, the recovery process of all the discharge ports can be carried out reliably within a short time.

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