Abstract: 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.

Abstract: 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.

Abstract: A printing apparatus according to an embodiment of this present invention includes a printhead with an orifice for discharging ink, and a recovery unit configured to perform recovery of the printhead by driving a print element of the printhead to discharge ink from the orifice. The apparatus makes a setting for a request for discharge recovery by the recovery unit after initialization processing performed upon power-on of the printing apparatus, and controls the recovery unit to execute one of first discharge recovery and second discharge recovery in which an ink discharge amount is smaller than in the first discharge recovery in accordance with the setting before a start of printing by the printhead.

Abstract: A sensor element includes an element body, a detection unit, a connector electrode, a porous layer that covers at least the front end-side part of a side surface on which the connector electrode is disposed and that has a porosity of 10% or more, and a dense layer. The dense layer is disposed on the side surface so as to divide the porous layer in the longitudinal direction of the element body or to be located closer to the rear end than the porous layer. The dense layer is located closer to the front end of the sensor element than the connector electrode. The dense layer covers the side surface and has a porosity of less than 10%. The dense layer includes an overlap portion that is a front end portion of the dense layer and covers the outer surface of a part of the porous layer.

Abstract: 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.

Abstract: An ejection apparatus includes an ejection head, and a recessed portion, a wiper, an installation unit, and a moving unit configured to move the blade and the ejection head relative to each other, wherein the wiper performs a wiping operation for wiping the ejection head to wipe the ejection port after wiping the recessed portion, and wherein in the wiping operation, a first wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a first distance in a direction perpendicular to the ejection port surface, and a second wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a second distance in the direction perpendicular to the ejection port surface, the second distance being larger than the first distance.

Abstract: An ejection apparatus includes an ejection head having an ejection port surface and configured to eject a liquid to a recording medium for recording, a wiper configured to wipe the surface, and a moving unit configured to relatively move the wiper and the head to move the wiper in a first direction along the surface with respect to the head. The apparatus performs a first mode for performing the wiping while relatively moving the wiper and the head at a first speed, and a second mode for performing the wiping while relatively moving the wiper and the head at a second speed higher than the first speed. When the apparatus performs the wiping after the recording and then performs subsequent recording, the apparatus performs the second mode. When the apparatus performs the wiping after the recording and then performs no subsequent recording, the apparatus performs the first mode.

Abstract: A sensor element includes element main body including side surfaces, a detection unit, connector electrodes disposed on the rear end-side part of the side surfaces, a porous layer that covers at least front end-side part of the side surface, the porous layer having a porosity of 10% or more, and a water-penetration reduction portion. The water-penetration reduction portion is disposed on the side surface so as to divide the porous layer or to be located closer to the rear end than the porous layer. The length L of the water-penetration reduction portion is 0.5 mm or more. The water-penetration reduction portion includes, among a dense layer covering the side surface and having a porosity of less than 10% and a gap region in which the porous layer is absent, at least the dense layer. The water-penetration reduction portion reduces the capillarity of water.

Abstract: A sensor element includes an element body, an upper connector electrode disposed on a first surface of the element body, and a protective layer that covers at least a front end-side part of the first surface. The protective layer includes a first specific protective layer having a thickness T1 of 10 ?m or less. The ratio T1/T2 of the thickness T1 to the thickness T2 of a front-side portion of the protective layer which faces the front end of the first specific protective layer is 1.0 or less.

Abstract: A sensor element includes element main body including side surfaces, a detection unit, connector electrodes disposed on the rear end-side part of the side surfaces, a porous layer that covers at least front end-side part of the side surface, the porous layer having a porosity of 10% or more, and a water-penetration reduction portion. The water-penetration reduction portion is disposed on the side surface so as to divide the porous layer or to be located closer to the rear end than the porous layer. The length L of the water-penetration reduction portion is 0.5 mm or more. The water-penetration reduction portion includes, among a dense layer covering the side surface and having a porosity of less than 10% and a gap region in which the porous layer is absent, at least the dense layer. The water-penetration reduction portion reduces the capillarity of water.

Abstract: A gas sensor includes a sensor element and one or more hollow columnar dense bodies. The sensor element includes an element main body having a side surface, a porous layer and a water-penetration reduction portion that cover at least a front end-side part of the side surface. The water-penetration reduction portion disposed on the side surface so as to divide the porous layer or to be located closer to the rear end than the porous layer, an overlap length W that is the length of a continuous overlap between a range in which the water-penetration reduction portion is present in a longitudinal direction and a range in which inner peripheral surfaces of the one or more dense bodies are present in the longitudinal direction being 0.5 mm or more, and having a dense layer covers the side surface, the water-penetration reduction portion reduces the capillarity of water.

Abstract: A sensor element includes element main body including side surfaces, a detection unit, connector electrodes disposed on the rear end-side part of the side surfaces, a porous layer that covers at least front end-side part of the side surface, the porous layer having a porosity of 10% or more, and a water-penetration reduction portion. The water-penetration reduction portion is disposed on the side surface so as to divide the porous layer or to be located closer to the rear end than the porous layer. The length L of the water-penetration reduction portion is 0.5 mm or more. The water-penetration reduction portion includes, among a dense layer covering the side surface and having a porosity of less than 10% and a gap region in which the porous layer is absent, at least the dense layer. The water-penetration reduction portion reduces the capillarity of water.

Abstract: 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.

Abstract: An ejection apparatus includes an ejection head having an ejection port surface and configured to eject a liquid to a recording medium for recording, a wiper configured to wipe the surface, and a moving unit configured to relatively move the wiper and the head to move the wiper in a first direction along the surface with respect to the head. The apparatus performs a first mode for performing the wiping while relatively moving the wiper and the head at a first speed, and a second mode for performing the wiping while relatively moving the wiper and the head at a second speed higher than the first speed. When the apparatus performs the wiping after the recording and then performs subsequent recording, the apparatus performs the second mode. When the apparatus performs the wiping after the recording and then performs no subsequent recording, the apparatus performs the first mode.

Abstract: An ejection apparatus includes an ejection head, and a recessed portion, a wiper, an installation unit, and a moving unit configured to move the blade and the ejection head relative to each other, wherein the wiper performs a wiping operation for wiping the ejection head to wipe the ejection port after wiping the recessed portion, and wherein in the wiping operation, a first wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a first distance in a direction perpendicular to the ejection port surface, and a second wiping operation is performed in a state where the ejection port surface and the installation unit on which the wiper is installed are at a second distance in the direction perpendicular to the ejection port surface, the second distance being larger than the first distance.

Abstract: A printing apparatus according to an embodiment of this present invention includes a printhead with an orifice for discharging ink, and a recovery unit configured to perform recovery of the printhead by driving a print element of the printhead to discharge ink from the orifice. The apparatus makes a setting for a request for discharge recovery by the recovery unit after initialization processing performed upon power-on of the printing apparatus, and controls the recovery unit to execute one of first discharge recovery and second discharge recovery in which an ink discharge amount is smaller than in the first discharge recovery in accordance with the setting before a start of printing by the printhead.

Abstract: A gas sensor includes a sensor element and one or more hollow columnar dense bodies. The sensor element includes an element main body having a side surface, a porous layer and a water-penetration reduction portion that cover at least a front end-side part of the side surface. The water-penetration reduction portion disposed on the side surface so as to divide the porous layer or to be located closer to the rear end than the porous layer, an overlap length W that is the length of a continuous overlap between a range in which the water-penetration reduction portion is present in a longitudinal direction and a range in which inner peripheral surfaces of the one or more dense bodies are present in the longitudinal direction being 0.5 mm or more, and having a dense layer covers the side surface, the water-penetration reduction portion reduces the capillarity of water.

Abstract: A gas sensor includes a sensor element and one or more hollow columnar dense bodies. The sensor element includes an element main body having a side surface, a porous layer and a water-penetration reduction portion that cover at least a front end-side part of the side surface. The water-penetration reduction portion disposed on the side surface so as to divide the porous layer an overlap length W that is the length of a continuous overlap between a range in which the water-penetration reduction portion is present in the longitudinal direction and a range in which inner peripheral surfaces of the one or more dense bodies are present in the longitudinal direction being 0.5 mm or more, the water-penetration reduction portion being a gap region in which the porous layer is absent, the water-penetration reduction portion reduces the capillarity of water.

Abstract: 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.

Abstract: A printing apparatus according to an embodiment of this present invention includes a printhead with an orifice for discharging ink, and a recovery unit configured to perform recovery of the printhead by driving a print element of the printhead to discharge ink from the orifice. The apparatus makes a setting for a request for discharge recovery by the recovery unit after initialization processing performed upon power-on of the printing apparatus, and controls the recovery unit to execute one of first discharge recovery and second discharge recovery in which an ink discharge amount is smaller than in the first discharge recovery in accordance with the setting before a start of printing by the printhead.