Internally pressure-regulated ink supply
AssigneeCanon Kabushiki Kaisha
InventorsKoji Terasawa, Akira Miyakawa, Takehiko Kiyohara
Life of this patent
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Abstract
A liquid ejection recording apparatus has a carriage, a liquid ejection recording unit, a lever biased by a spring for mounting the unit on the carriage, and a communication hole portion formed in an ink tank in the unit. When the unit is fixed on the carriage for printing, a projection presses the communication hole portion to provide a communication hole for communicating the interior of the ink tank with the outer atmosphere. Stable ink ejection is guaranteed without clogging of a nozzle or the like and regardless of the amount of ink remaining in the ink tank.
Claims19
A liquid ejection recording unit comprising:
- ink discharge means including means defining an orifice and means for discharging ink droplets from said orifice;
- ink containing means for containing ink to be supplied to said ink discharge means;
- an ink supply path having an end opening into said ink containing means for supplying ink from said ink containing means to said orifice;
- and
- pressurizing means provided on the inside of said ink containing means, at said end of said ink supply path opening into said ink containing means, for supplying pressurized ink to said ink discharge means in response to an external force acting on said pressurizing means.
Dependencies are inferred from the claim text.