Canon Kabushiki Kaisha

Tetsuya Narazaki

Kei Kosaka

Hirokazu Yoshikawa

Toshiyuki Chikuma

Koki Shimada

Yusuke Tanaka

Atsushi Takei

A printing apparatus includes a mounting unit, a tank, a pump, a detection unit, an obtainment unit, and a control unit. The mounting unit is configured so that a head that ejects ink can be mounted in a replaceable manner. The tank contains ink to be supplied to the head via a tube. The pump discharges ink to an outside of the head. The detection unit detects that the head mounted on the mounting unit has been replaced. The obtainment unit obtains information of a usage history which indicates whether or not the head mounted as a replacement has been used. The control unit controls a discharge operation, which is performed by the pump after head replacement, to be changed based on the information of the usage history.

Printing apparatus and control method thereof

A liquid discharge apparatus includes a print head with a nozzle discharging a liquid, a pump to suction the liquid from the nozzle, and to eject the liquid into a waste liquid tank, a control unit to change a driving amount of the pump to control an amount of the liquid ejected, and a calculation unit to calculate an amount of the liquid in the tank. The control unit drives the pump by a second driving amount less than a first, if a sum of an amount of the liquid ejected when the pump is driven by the first driving amount and an amount of the liquid in the waste liquid tank is equal to or greater than a predetermined amount. The calculation unit calculates a cumulative amount of the liquid suctioned by the pump from the nozzle as the amount of the liquid in the waste liquid tank.

Liquid discharge apparatus and control method thereof

A printing apparatus counts an ink quantity in an ink tank in accordance with consumption of ink from the ink tank, updates and holds a count value obtained by the count in a counter, and detects whether ink injection to the ink tank has been done before execution of sensing by a sensing unit configured to sense whether a predetermined quantity of ink is present in the ink tank. If sensing by the sensing unit is executed, the apparatus reads out a preceding sensing result from a memory that stores a sensing result of presence/absence of the ink by the sensing unit, verifies a transition between the preceding sensing result and a current sensing result, and controls operations of reset of the count value held by the counter and the count based on the transition and a result of the detection.

Printing apparatus and ink quantity detection method thereof

There is provided a liquid discharge apparatus comprising: a discharge unit for performing recording processing in which a liquid is discharged onto a recording medium; a waste liquid containing unit for containing a waste liquid; a mount unit to which the waste liquid containing unit is mounted; a detection unit for detecting whether the waste liquid containing unit is mounted; and a control unit for controlling a discharge operation of a liquid from the discharge unit, wherein if the detection unit detects that the waste liquid containing unit is not mounted, the control unit controls not to perform the discharge operation, and the control unit performs a first recovery operation for restoring the discharge unit after the detection unit has detected that the waste liquid containing unit is not mounted, and before the next execution of the recording processing.

Liquid discharge apparatus, control method, and computer-readable storage medium

There is provided a liquid discharge apparatus. A print head includes a nozzle that discharges a liquid. A recovery unit includes a cap that caps the nozzle and a pump that suctions a liquid from the nozzle via the cap, and discharges to a waste liquid tank that accommodates a waste liquid of suctioned liquid. A control unit causes the recovery unit to execute at least one of a first recovery operation, in which the suction pump is driven at a first driving amount, or a second recovery operation, in which the pump is driven at a second driving amount smaller than the first driving amount, based on an amount of waste liquid discharged to the waste liquid tank.

There is provided a printing apparatus. A cap caps an ink ejection surface of a printhead. An ink suction path is connected to the cap and sucks the ink in the cap. An ink tank stores the ink to be supplied to the printhead. An ink supply path connects the printhead to the ink tank. A first closing unit closes the ink suction path. A second closing unit closes the ink supply path. A control unit is able to execute a first control mode in which the first closing unit closes the ink suction path and a second control mode in which the second closing unit closes the ink supply path.

Growing community of inventors

Inagi, Japan

Tetsuya Narazaki