Ink jet recording with coordinated capping and recovery ejection

Details Ink jet recording with coordinated capping and recovery ejection Ink jet recording with coordinated capping and recovery ejection

1992-08-06

1995-04-11

Hartary, Joseph W.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 29, B41J 2165

Patent

active

054063175

ABSTRACT:
A recording apparatus for performing recording with an ink jet recording head, capable of ejecting ink onto a recording medium, comprises a cap to be opened and closed with respect to a discharge-orifice face of the recording head and a cap drive mechanism for opening the cap at the initiation of recording head driving and closing the cap when a non-driving period of the recording head exceeds a predetermined period of time .alpha.. A preliminary ejection circuit causes ejection of ink from the discharge orifices by driving the recording head to remedy defective ink ejection and preliminary ejection drive circuitry provides for preliminary ejection when a predetermined period of time .beta. is exceeded after a previously executed preliminary ejection, wherein the predetermined period of time .beta. does not include time during which the cap is closed.

REFERENCES:
patent: 3925788 (1975-12-01), Kashio
patent: 3925789 (1975-02-01), Kashio
patent: 4577203 (1986-03-01), Kawamura
patent: 4739340 (1988-04-01), Terasawa
patent: 4819012 (1989-04-01), Kiyohara et al.
patent: 4967204 (1990-10-01), Terasawa et al.
patent: 5109233 (1992-04-01), Nishikawa
British Patent Office Official Action in Application No. GB 9103003.1, May 11, 1993.
British Patent Office Official Action in Application No. GB 9103003.1, Feb. 7, 1994.

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