Abstract: A liquid supply system includes a liquid reservoir tank and a cartridge. The liquid reservoir tank includes: a first air communication portion; a first connection portion configured to connect the cartridge and the liquid reservoir tank into liquid communication in a state where the cartridge is mounted on the liquid reservoir tank; and a second connection portion configured to be located above the first connection portion, liquid-tightly connected with the cartridge for connect the cartridge and the first air communication portion into air communication, in the state where the cartridge is mounted on the liquid reservoir tank. The second connection portion is located below a liquid surface of the liquid reserved in the cartridge at a time when the cartridge in an initial state is mounted on the liquid reservoir tank, the second connection portion is located below a liquid surface of the liquid reserved in the cartridge.

Abstract: An ink-jet printing apparatus includes an ink-cartridge mounting unit to which an ink cartridge having a first ink chamber containing ink is to be mounted, and a second ink chamber. The second ink chamber stores ink supplied from the first ink chamber. The ink-jet printing apparatus is configured such that, in a case where the ink cartridge is mounted to the ink-cartridge mounting unit, the second ink chamber can be viewed from outside of the ink-jet printing apparatus. An equation 0.5 L?d?1.2 L is satisfied, where d is a length of the second ink chamber, and L is a length of the ink cartridge in a direction in which the ink cartridge is inserted into the ink-jet printing apparatus.

Abstract: A technique with which deterioration in a function of detecting the remaining amount of liquid can be prevented even in a case where the liquid is thickened or solidified is to be provided. A liquid ejection apparatus is provided with a liquid ejection head configured to eject supplied liquid, a storage unit configured to store the liquid to be supplied to the liquid ejection head, a pivot member configured to be immersed in the liquid stored in the storage unit and be revolvable according to the amount of the liquid, and a detection unit configured to detect the amount of the liquid by use of the pivot member, and the liquid ejection apparatus includes a pivot unit configured to force the pivot member to pivotally move.

Abstract: An ink-jet printing apparatus includes an ink-cartridge mounting unit to which an ink cartridge having a first ink chamber containing ink is to be mounted, and a second ink chamber. The second ink chamber stores ink supplied from the first ink chamber. The ink-jet printing apparatus is configured such that, in a case where the ink cartridge is mounted to the ink-cartridge mounting unit, the second ink chamber can be viewed from outside of the ink-jet printing apparatus. An equation 0.5 L ? d ? 1.2 L is satisfied, where d is a length of the second ink chamber, and L is a length of the ink cartridge in a direction in which the ink cartridge is inserted into the ink-jet printing apparatus.

Abstract: A liquid supply apparatus includes a liquid storage tank in communication with a liquid ejecting head that ejects liquid and a cartridge configured to be detachably provided to the liquid storage tank. The liquid storage tank includes an atmosphere communication portion in communication with the atmosphere and a first connecting portion that, in a state where the cartridge is attached to the liquid storage tank, enables the cartridge to be in liquid communication with the liquid storage tank. The liquid storage tank also includes a second connecting portion that, in the state where the cartridge is attached to the liquid storage tank, is connected to the cartridge so as to be liquid-tight with the cartridge and enables the cartridge to be in gaseous communication with the atmosphere communication portion.

Abstract: According to an aspect of the present invention, a liquid discharge head includes a discharge outlet configured to discharge a liquid, wherein a division member dividing the discharge outlet into a plurality of regions is formed in the discharge outlet when viewed from a position facing the discharge outlet, wherein, when a direction in which the liquid is discharged from the discharge outlet is a direction upward from bottom, the division member has a first surface and a second surface facing upward, and wherein the second surface is disposed at the bottom lower than the first surface.

Abstract: An ink-jet printing apparatus includes an ink-cartridge mounting unit to which an ink cartridge having a first ink chamber containing ink is to be mounted, and a second ink chamber. The second ink chamber stores ink supplied from the first ink chamber. The ink-jet printing apparatus is configured such that, in a case where the ink cartridge is mounted to the ink-cartridge mounting unit, the second ink chamber can be viewed from outside of the ink-jet printing apparatus. An equation 0.5?L?d?1.2 L is satisfied, where d is a length of the second ink chamber, and L is a length of the ink cartridge in a direction in which the ink cartridge is inserted into the ink-jet printing apparatus.

Abstract: A liquid supply apparatus includes a liquid storage tank in communication with a liquid ejecting head that ejects liquid and a cartridge configured to be detachably provided to the liquid storage tank. The liquid storage tank includes an atmosphere communication portion in communication with the atmosphere and a first connecting portion that, in a state where the cartridge is attached to the liquid storage tank, enables the cartridge to be in liquid communication with the liquid storage tank. The liquid storage tank also includes a second connecting portion that, in the state where the cartridge is attached to the liquid storage tank, is connected to the cartridge so as to be liquid-tight with the cartridge and enables the cartridge to be in gaseous communication with the atmosphere communication portion.

Abstract: A liquid supply apparatus includes a liquid storage tank in communication with a liquid ejecting head that ejects liquid and a cartridge configured to be detachably provided to the liquid storage tank. The liquid storage tank includes an atmosphere communication portion in communication with the atmosphere and a first connecting portion that, in a state where the cartridge is attached to the liquid storage tank, enables the cartridge to be in liquid communication with the liquid storage tank. The liquid storage tank also includes a second connecting portion that, in the state where the cartridge is attached to the liquid storage tank, is connected to the cartridge so as to be liquid-tight with the cartridge and enables the cartridge to be in gaseous communication with the atmosphere communication portion.

Abstract: A technique with which deterioration in a function of detecting the remaining amount of liquid can be prevented even in a case where the liquid is thickened or solidified is to be provided. A liquid ejection apparatus is provided with a liquid ejection head configured to eject supplied liquid, a storage unit configured to store the liquid to be supplied to the liquid ejection head, a pivot member configured to be immersed in the liquid stored in the storage unit and be revolvable according to the amount of the liquid, and a detection unit configured to detect the amount of the liquid by use of the pivot member, and the liquid ejection apparatus includes a pivot unit configured to force the pivot member to pivotally move.

Abstract: An ink-jet printing apparatus includes an ink-cartridge mounting unit to which an ink cartridge having a first ink chamber containing ink is to be mounted, and a second ink chamber. The second ink chamber stores ink supplied from the first ink chamber. The ink-jet printing apparatus is configured such that, in a case where the ink cartridge is mounted to the ink-cartridge mounting unit, the second ink chamber can be viewed from outside of the ink-jet printing apparatus. An equation 0.5?L?d?1.2 L is satisfied, where d is a length of the second ink chamber, and L is a length of the ink cartridge in a direction in which the ink cartridge is inserted into the ink-jet printing apparatus.

Abstract: An ejection port includes a first ejection port that is an opening portion formed on an outer surface side of a recessed portion formed in an outer surface of a nozzle plate, a second ejection port positioned on a bottom surface side of the recessed portion, the second ejection port including an opening portion that is smaller than the first ejection port, and a plurality of protrusions that extend from an outer edge portion of the first ejection port towards a center portion of the second ejection port through the second ejection port, in which a distance between tip portions of the plurality of protrusions and the substrate is larger than a distance between an outer edge portion of the second ejection port and the substrate.

Abstract: An ejection port includes a first ejection port that is an opening portion formed on an outer surface side of a recessed portion formed in an outer surface of a nozzle plate, a second ejection port positioned on a bottom surface side of the recessed portion, the second ejection port including an opening portion that is smaller than the first ejection port, and a plurality of protrusions that extend from an outer edge portion of the first ejection port towards a center portion of the second ejection port through the second ejection port, in which a distance between tip portions of the plurality of protrusions and the substrate is larger than a distance between an outer edge portion of the second ejection port and the substrate.

Abstract: Provided are a liquid ejecting method, a liquid ejecting device, and a liquid ejecting system which can avoid damage of an electro-thermal conversion element caused by cavitation and can prolong a life thereof even in a case that handling with a configuration of an ejecting port is difficult. For that purpose, ejection is performed for a low-duty region by controlling such that variation in an ejection speed is made smaller, and ejection is performed for a high-duty region by controlling such that variation in the ejection speed is made larger.

Abstract: The invention provides a liquid ejection head equipped with an energy generating element generating energy utilized for ejecting a liquid, a liquid supply port provided at a surface on which the energy generating element is provided for supplying the liquid to the energy generating element, a liquid flow path for supplying the liquid to the energy generating element from the liquid supply port and a rib extending from the liquid supply port toward an inlet of the liquid flow path, wherein an end portion of the rib on the side of the liquid flow path is provided at a position deviated from a center line of the liquid flow path.

Abstract: The invention provides a liquid ejection head equipped with an energy generating element generating energy utilized for ejecting a liquid, a liquid supply port provided at a surface on which the energy generating element is provided for supplying the liquid to the energy generating element, a liquid flow path for supplying the liquid to the energy generating element from the liquid supply port and a rib extending from the liquid supply port toward an inlet of the liquid flow path, wherein an end portion of the rib on the side of the liquid flow path is provided at a position deviated from a center line of the liquid flow path.

Abstract: A liquid ejection head in which the adverse effect of a heating resistor element due to cavitation is reduced and a printing apparatus employing this liquid ejection head are provided. When a length of a heating resistor element in a direction in which ink is to be supplied is defined by L, the center of an ejection port is shifted, at a distance equal to or longer than L/7 toward a location of an ink supply port, from the center of the heating resistor element, viewed in a direction in which ink is to be ejected. When a length of the ejection portion in the direction in which ink is to be ejected is defined as l and a length of a bubble generation chamber in the direction in which the liquid is to be ejected is defined as h, l/h is equal to or less than 2.

Abstract: Provided are a liquid ejecting method, a liquid ejecting device, and a liquid ejecting system which can avoid damage of an electro-thermal conversion element caused by cavitation and can prolong a life thereof even in a case that handling with a configuration of an ejecting port is difficult. For that purpose, ejection is performed for a low-duty region by controlling such that variation in an ejection speed is made smaller, and ejection is performed for a high-duty region by controlling such that variation in the ejection speed is made larger.

Abstract: A liquid ejection head that the adverse effect of a heating resistor element due to cavitation is reduced and a printing apparatus employing this liquid ejection head are provided. When a length of a heating resistor element in a direction in which ink is to be supplied is defined by L, the center of an ejection port is shifted, at a distance of equal to or longer than L/7 toward a location of an ink supply port, from the center of the heating resistor element, viewed in a direction in which ink is to be ejected. When a length of the ejection portion in the direction in which ink is to be ejected is defined as l and a length of a bubble generation chamber in the direction in which the liquid is to be ejected is defined as h, l/h is equal to or smaller than 2.

Abstract: A print head includes an energy generating element, a chamber for accommodating liquid, and an ejection opening for ejecting liquid from the chamber, thus applying the energy to the liquid in the chamber from the energy generating element to eject the liquid from the ejection opening, wherein the ejection opening includes at least two projections convex to an inside of the ejection opening in a cross section perpendicular to a liquid ejecting direction and has a tapered angle ?1 in regard to the liquid ejecting direction, enabling a meniscus of the liquid to be formed therebetween at the liquid ejecting time, and an outer edge portion has a tapered angle ?2 in regard to the liquid ejecting direction, wherein the tapered angles ?1 and ?2 are defined to meet a formula of 0°??1?10° and a formula of ?2>?1.