Seiko Epson Corporation

Manabu Munakata

Ken Ikuma

Yujiro Nomura

Nobumasa Abe

Noriaki Okazawa

Shinichi Kamoshida

Masahide Nakamura

Shigeki Suzuki

Takaaki Koizumi

Hajime Nakao

Haruhisa Uezawa

Masato Komazawa

Shinichi Tsubota

Noriaki Yamashita

Yuji Tabata

A liquid ejecting head includes first nozzles configured to eject a liquid in an ejecting direction, a first nozzle forming surface in which openings of the first nozzles are formed, a first surface being adjacent to the first nozzle forming surface when viewed in an opposite direction to the ejecting direction and provided in the ejecting direction relative to the first nozzle forming surface, and a first film member having water repellency on a surface directed to the ejecting direction and being detachably provided to the first surface in such a way as to expose the first nozzle forming surface in the ejecting direction.

Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head includes a first-nozzle-row set in which a pair of first-nozzle-rows is disposed in a second direction intersecting a first direction so that the first-nozzle-rows are symmetrical about a reference line extending in the first direction and a second-nozzle-row set in which a pair of second-nozzle-rows is disposed in the second direction so that the second-nozzle-rows are symmetrical about the reference line. In the second direction, the distance between the second-nozzle-rows is longer than the distance between the first-nozzle-rows. First nozzles constituting the first-nozzle-row set communicate with a first liquid supply source via a first supply flow path. Second nozzles constituting the second-nozzle-row set communicate with a second liquid supply source via a second supply flow path. Compliance capacity of the second supply flow path is larger than compliance capacity of the first supply flow path.

A liquid ejecting apparatus including a liquid ejecting head including a nozzle for ejecting liquid by driving a drive element, an electrical component coupled to the drive element, a liquid storing member including a filling port for injecting the liquid from a refilling container therethrough, the liquid storing member receiving and storing the liquid through the filling port, and a holder mounting the liquid ejecting head, the electrical component, and the liquid storing member. In the liquid ejecting apparatus, the electrical component and the filling port do not overlap each other in plan view.

Liquid ejecting apparatus

A liquid ejecting head includes a flow path member in which a first substrate and a second substrate are joined to each other by an adhesive so that flow paths extending in directions along a junction surface between the first substrate and the second substrate are formed, and an ejection unit. The flow paths include a first flow path through which a first liquid flows and a second flow path through which a second liquid flows. The ratio of presence of a flow path between a demarcation wall that at least partially forms the first flow path and an external contour of the flow path member in the directions along the junction surfaces is greater than the ratio of presence of a flow path between a demarcation wall that at least partially forms the second flow path and the external contour of the flow path member.

A liquid discharging apparatus includes a liquid discharging portion which discharges ink supplied from a liquid container, a limit value setting portion which sets a limit value L to be changed with time, and a discharging control portion which controls the liquid discharging portion to discharge the ink with a duty within a range of the limit value L set by the limit value setting portion.

Liquid discharging apparatus

A liquid discharge apparatus includes: a liquid discharge section configured to discharge liquid supplied from a liquid container in accordance with a drive signal; a sensor configured to measure a remaining quantity of the liquid in the liquid container; a measurement section configured to identify a measurement consumption quantity being a variation quantity of the remaining quantity in a measurement period; an estimation section configured to estimate an estimated consumption quantity of the liquid in accordance with print contents in the measurement period; a comparison section configured to make a comparison between the measurement consumption quantity and the estimated consumption quantity; if the measurement consumption quantity is smaller than the estimated consumption quantity by comparison of the comparison section, an inspection section configured to inspect whether or not there is a discharge defect in the liquid discharge section; and if the inspection section determines that there are no discharge defects, an adjustment section configured to adjust an amplitude of the drive signal.

Liquid discharge apparatus

A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.

Liquid-jet head and liquid-jet apparatus

Provided is a first flow path substrate where a first flow path out of a liquid flow path is formed, a second flow path substrate where a second flow path which communicates with the first flow path is formed, and a third flow path substrate where a pressure chamber which communicates with the second flow path is formed. The second flow path substrate has a first surface which is bonded to oppose the third flow path substrate and a second surface which is bonded to oppose the first flow path substrate; the first surface of the second flow path substrate is bonded with the third flow path substrate via a film of paraxylene; and the second surface of the second flow path substrate is bonded by an adhesive of a material which is different from that of the film of paraxylene.

Flow path unit, liquid ejecting head, liquid ejecting apparatus, and method of manufacturing flow path unit

A liquid ejection apparatus includes a liquid ejecting head having a head body that ejects liquid from nozzle openings and a flow path member that includes a liquid flow path through which the liquid is supplied to the head body, the liquid flow path being provided with a filter chamber disposed at a position in the liquid flow path with a filter disposed inside the filter chamber, and a portion of the filter chamber which opposes the filter being made of an elastic member; a pressing unit that presses the elastic member toward the filter; and a suction unit that suctions the liquid in the liquid flow path from the nozzle openings.

Liquid ejection apparatus

A liquid ejecting head includes a flow path formation substrate on which individual flow paths communicating with nozzle openings for ejecting liquid are provided, a first member which is provided at one surface side of the flow path formation substrate and has pressure generation units for generating pressure change in liquid in the individual flow paths, and a second member which is provided at a surface side of the flow path formation substrate, which is opposite to the first member. Dummy flow paths are provided on the flow path formation substrate independently of the individual flow paths. Exposure portions which expose a part of wall surfaces of the flow path formation substrate which form the dummy flow paths, are provided at least one of the first member and the second member.

A threshold passed signal indicating that a threshold for a remaining liquid amount has been passed is inputted from a threshold sensor that detects the actual remaining liquid amount in the liquid holding unit when the liquid ejection command is being executed, the control apparatus drives the liquid ejecting head so that the liquid continues to be ejected based on the liquid ejection command until the inputted liquid ejection command ends.

Control apparatus for a liquid ejecting head, liquid ejecting apparatus, and control method for a liquid ejecting head

One of the two flow passages branches from one of two ink cartridges to one of the two discharging portions and one of the two individual discharging portions. The other flow passage branches from the other ink cartridge to the other discharging portion and the other individual discharging portion. A ratio of frequency of use of each of the discharging portions, Ra, and frequency of use of each of the individual discharging portions, Rb, satisfies Ra:Rb=1:1/2.

Liquid ejecting apparatus and method for controlling liquid ejecting head

A charge accumulated on an insulative nozzle plate flows into the ink with which nozzle openings and pressure generation chambers are filled and reaches a vibration plate. The charge that has reached the vibration plate is driven out therethrough because the vibration plate is made of a conductive ceramic material and is grounded. Therefore, it is possible to obtain an ink jet recording head in which insulation breakdown of the vibration plate caused by the charge accumulated on the vibration plate is suppressed from occurring and a driving circuit is suppressed from being damaged.

A nozzle plate made of conductive ceramics is grounded. Therefore, electric charges do not easily accumulate on the nozzle plate. The migration of electric charges from nozzle orifices to a diaphragm plate through ink filled in pressure generation chambers is unlikely to occur or significantly less likely to occur. Thus, it is possible to prevent the dielectric breakdown of the diaphragm plate caused conventionally by accumulated electric charges and to provide an ink-jet recording head that is substantially free from the damage of a driving circuit.

One of the two flow passages branches from one of two ink cartridges to one of the two discharging portions and one of the two individual discharging portions. The other flow passage branches from the other ink cartridge to the other discharging portion and the other individual discharging portion. A ratio of frequency of use of each of the discharging portions, Ra, and frequency of use of each of the individual discharging portions, Rb, satisfies Ra:Rb=1:&#xbd;.

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Matsumoto, Japan

Manabu Munakata