Ink jet recording apparatus with controlled recovery operation
AssigneeCanon Kabushiki Kaisha
InventorsKazuyoshi Takahashi, Yasuhiro Numata, Koji Terasawa, Hideo Fukazawa, Hitoshi Miyazaki, Takao Aichi
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Abstract
An ink jet recording apparatus comprises a timer for measuring an elapse of time from a predetermined measurement start timing, a backup power source for supplying power to the timer when a main power source is turned off, and a controller for changing the content and/or the frequency of a recover operation for recovering and preventing a discharge error in a discharge port for discharging ink on the basis of the elapsed time.
Claims9
An ink jet apparatus having a recovery mechanism for performing ink jet recovery operations to recover ink discharge from an ink jet head, said apparatus comprising:
- timer means for measuring a predetermined time period;
- control means for selecting and effecting one of plural ink jet recovery operations based on the time period measured by said timer means, each said recovery operation being distinct and independent from each other;
- and
- a back-up power source for effecting measurement by said timer means even when a power source of said ink jet apparatus is turned off,
- wherein said control means resets said timer means in response to completion of an effected recovery operation, and further wherein at least a time period from when the effected recovery operation is completed directly before a turning-off of the power source of said ink jet apparatus to a turning-on of the power source of said ink jet apparatus is measured said control means selects and effects one of the plural recovery operations based on the measured time period, when the power source of said ink jet apparatus is turned on.
Dependencies are inferred from the claim text.