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Ink-jet-misdischarge-recovery-by-simultaneously-driving-an-ink-jet-head-and-exhausting-ink-therefrom

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Ink jet misdischarge recovery by simultaneously driving an ink jet head and exhausting ink therefrom

Details

Inventors: Tokunaga, Tatsuyuki; Moriyama, Jiro;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Hartary; Joseph W.
Assistant Examiner:
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto

A method is used for recovering misdischarge of liquid in an on-demand type liquid jet recording apparatus. The apparatus comprises a recording head having a discharge port for discharging liquid, a liquid path communicating with the discharge port and energy generating means provided in response to the liquid path so as to generate energy utilized for discharging liquid, and exhausting means for exhausting liquid in the liquid path. Drive of the energy generating means is performed in synchronism with drive of the exhaust means at least in a predetermined time period.

DETAILED DESCRIPTION It is an object of the present invention to provide a method for recovering misdischarge in an ink jet recording apparatus which allows recording at a best condition in any circumstance.
It is another object of the present invention to provide an ink jet recording apparatus which can remove air bubbles of any size with a simple construction and enable high quality recording.
Still another object of the invention is to provide an ink jet recording apparatus comprising a recording head having energy generating means for generating energy to be used to discharge ink, exhaust means for exhausting ink in said recording head; drive means for applying a drive signal to said energy generating means to drive said recording head in response to the drive of said exhausting means and means for varying the drive signal applied to said energy generating means in response to the drive of said exhausting means.
Still another object of the invention is to provide a method for recovering misdischarge of liquid in an on-demand type liquid jet recording apparatus, said apparatus comprising a recording head having a discharge port for discharging liquid, a liquid path communicating with said discharge port and energy generating means provided in response to said liquid path so as to generate energy utilized for discharging liquid and exhausting means for exhausting liquid in said liquid path, wherein drive of said energy generating means is performed in synchronism with drive of said exhaust means at least in a predetermined time period.
Still another object of the invention is to provide a method for recovering misdischarge of liquid in a liquid jet recording apparatus, said apparatus comprising a recording head having a discharge port for discharging liquid, a liquid path communicating with said discharge port and energy generating member provided in response to said liquid path so as to generate energy utilized for discharging liquid and suction means for sucking liquid from said discharge port, wherein said recording head is driven by changing a signal to be applied to said energy generating means in response to drive of said suction means

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