Canon Kabushiki Kaisha

Shimpei Yoshikawa

Kyosuke Toda

Chiaki Muraoka

Ryo Sato

Hiroki Tajima

Takeho Miyashita

Tokuji Kudo

Hiromasa Amma

Takuya Iwano

Yosuke Takagi

Naoko Shimizu

Keiichiro Tsukuda

Kenji Yabe

Yuji Tamaru

Sayaka Seki

Yasuaki Kitayama

Kimiyuki Hayasaki

Genji Inada

Shuzo Iwanaga

Yukuo Yamaguchi

Takaaki Yamaguchi

Satoshi Kimura

Masaki Oikawa

Keiji Tomizawa

Mikiya Umeyama

Naoko Tsujiuchi

Yuichiro Akama

Akiko Hammura

Tomohiro Sato

Tomoki Ishiwata

Atsushi Omura

Kazuhiko Okito

Monta Matsui

Naoki Nakajo

Satoshi Ideta

In a circulation channel, which is configured at least with an ejection unit, a first pressure adjusting unit, a second pressure adjusting unit, a pump, and a temperature adjusting unit, liquid supplied from the outside flows into the first pressure adjusting unit and then flows out of the first pressure adjusting unit into the ejection unit and the second pressure adjusting unit. The liquid that has flowed out of the ejection unit and the liquid that has flowed out of the first pressure adjusting unit flow into the second pressure adjusting unit and then flow out of the second pressure adjusting unit into the pump. The pump sends the liquid that has flowed out of the second pressure adjusting unit to the first pressure adjusting unit, and the temperature of the circulating liquid is adjusted by the temperature adjusting unit.

Liquid ejection head and liquid ejection apparatus

A liquid ejection apparatus includes a printing element board, supply and collection flow passages, a liquid feeding mechanism, and first and second bubble reservoir units. The printing element board includes a pressure chamber having an ejection port from which the printing element board ejects a liquid. The supply and collection flow passages communicate with the pressure chamber. The liquid feeding mechanism generates a difference in pressure between the supply and collection flow passages to supply the liquid from the supply flow passage to the pressure chamber and to recover the liquid in the pressure chamber from the collection flow passage. The first bubble reservoir unit connects the supply flow passage to the liquid feeding mechanism. The second bubble reservoir unit connects the collection flow passage to the liquid feeding mechanism. A volume of the first bubble reservoir unit is larger than a volume of the second bubble reservoir unit.

A liquid ejection head and liquid ejection apparatus, which are capable of preventing deterioration in ink circulation efficiency in the vicinities of ejection ports, includes a common supply channel and a common collection channel as separate channels. Ink supplied from the common supply channel is supplied to pressure chambers through supply connection channels, and collected from the pressure chambers into the common collection channel through collection connection channels. Also, the common supply channel and the common collection channel extend in a direction crossing a main scanning direction in which the liquid ejection head is scanned and the ejection direction of the liquid.

A liquid discharge head includes a discharge port array having a plurality of discharge ports and a supply port array having a plurality of supply ports. The discharge port array and the supply port array extend from a first to a second end of the liquid discharge head. The plurality of discharge ports includes a first-end discharge port closest to the first end and a second-end discharge port closest to the second end. The plurality of supply ports includes a first-end supply port closest to the first end and a second-end supply port closest to the second end. Seen from a position facing openings of the plurality of discharge ports, an end of an opening of the first-end supply port adjacent to the first end is at a position nearer to the first end than an end of an opening of the first-end discharge port adjacent to the first end.

Liquid discharge head and liquid discharge apparatus

A liquid ejection head includes an ejection unit, a channel member, and a circulation unit. The ejection unit includes an ejection port array in which ejection ports configured to eject a liquid are arrayed, and a communication channel communicating with the ejection port array. The channel member includes a channel that supplies and collects the liquid to and from the communication channel. The circulation unit supplies the liquid to the channel of the channel member and collects the liquid from the channel of the channel member. The ejection unit further includes a plurality of ejection port arrays that eject a liquid of the same type, and a plurality of communication channels corresponding to the plurality of ejection port arrays. The channel member includes a plurality of individual channels respectively through which the plurality of communication channels communicate with one of the circulation unit as a single circulation unit.

A liquid ejection apparatus includes an ejection head that ejects a liquid, a container that stores the liquid, and a reservoir that supplies the liquid to the ejection head and stores the liquid supplied from the container. The reservoir includes a first chamber that stores the liquid, a second chamber that is arranged downstream of the first chamber and stores the liquid, and a first flow path and a second flow path that communicate the first and second chambers with each other. A communication port between the first chamber and the second flow path is located lower than a communication port between the first chamber and the first flow path in a usage posture of the liquid ejection apparatus. The second flow path is configured so that a rate of a pressure loss increases as a flow rate of the liquid flowing inside the second flow path increases.

Liquid ejection apparatus

A liquid ejection head and a liquid ejection apparatus suppressing the occurrence of an ejection failure without increasing the size of the apparatus are provided. To this end, between a circulation unit and a supply flow path communicating with a pressure chamber, a flow path is provided, having a vertical cross-sectional area in a liquid circulation direction, which is double or more a vertical cross-sectional area in a liquid circulation direction in the supply flow path and having a flow path inner wall inclined with respect to the gravitational direction and whose component force of a normal vector has a component in the gravitational direction.

A liquid ejection head has: a frame having a plurality of ejection ports for ejecting a liquid; a common liquid chamber; a plurality of individual liquid chambers through which the common liquid chamber communicates with each of the ejection ports; and a plurality of energy generating elements disposed in respective individual liquid chambers. A part of a wall of the frame that forms the common liquid chamber is formed of an elastic member capable of deforming elastically, so that a volume of the common liquid chamber can be modified.

Liquid ejection head

A liquid discharge head includes a channel member and a recording element substrate. The channel member includes a discharge port configured to discharge liquid and at least one channel configured to supply the liquid to the discharge port. The recording element substrate includes a supply path and an energy generating element. The supply path connects to the at least one channel with a connection and is configured to supply the liquid to the at least one channel. The energy generating element is configured to discharge the liquid from the discharge port. The channel member further includes, at positions of the channel member facing the connection, a plurality of spaces, the spaces being formed by covering part of recesses of the channel member with a covering portion, the spaces each including an opening communicating with the at least one channel.

A liquid ejecting head and a liquid ejecting apparatus can suppress decrease in ejection accuracy while suppressing increase in cost and decrease in productivity. To this end, a sub-tank is attached to a bottom of a main body part with a greater number of screws on the front side where the stiffness is low than that on the back side where the stiffness is high.

Liquid ejecting head and liquid ejecting apparatus

A liquid supply member includes a first member, a second member, and a damper member disposed between the first member and the second member, wherein the first member is a member configured to form a liquid chamber, wherein the damper member is a flexible member configured to form the liquid chamber together with the first member, wherein the second member is a member configured to form an atmosphere communication chamber communicating with an ambient atmosphere at a position between the damper member and the second member and opposing the liquid chamber with the damper member in between, and wherein a protrusion portion is formed on a surface of the second member facing the atmosphere communication chamber at a position corresponding to a central part of the damper member, the protrusion portion protruding toward the damper member beyond a connection surface between the damper member and the second member.

Liquid supply member and liquid discharge head

A liquid ejection head includes a flow path-forming part having a flow path for liquid supplied from a liquid reservoir and a plurality of outlet ports for discharging the liquid, a liquid ejecting unit having a plurality of inlet ports into which the liquid flows and a plurality of ejection element rows corresponding to the inlet ports and each having a plurality of ejection elements to eject the liquid, and a sealing member having a sealing opening which allows communication between the plurality of outlet ports and the plurality of inlet ports. sealing member seals a portion between the flow path-forming part and the liquid ejecting unit so that the plurality of outlet ports and the plurality of inlet ports are in communication. A plurality of the sealing openings are provided for the sealing member, and at least one of the sealing openings has at least two inlet ports.

A liquid ejection head includes an element substrate having an energy-generating element configured to generate an energy for ejecting a liquid from an ejection orifice, a support member for supporting the element substrate, the support member including a liquid chamber formed therein to supply the liquid to the ejection orifice, and a damper portion for absorbing vibration of the liquid inside the liquid chamber, the damper portion being flexible. The support member has a through-hole for communicating with the liquid chamber at a position located above the liquid chamber in a vertical direction when the liquid ejection head is in a use orientation. The damper portion has a taper portion that tapers downwardly in the vertical direction and is positioned in such a manner that the tapering portion closes the through-hole, and the damper portion and the support member are attached to each other by a fixing member.

Liquid ejection head and manufacturing method of liquid ejection head

A liquid filling method of filling a liquid storage device including a first tank that stores a liquid to be supplied to an ejection head ejecting the liquid and a second tank that stores the liquid to be supplied to the first tank through a connection port provided in the first tank with the liquid, the method including: injecting the liquid from a liquid storage container into the first tank through a first liquid introduction port provided in the first tank, in a state where a second liquid introduction port provided in the second tank is closed.

Liquid storage device and liquid filling method

A liquid ejection apparatus includes: a recording head that ejects liquid; a sub-tank that is connected to the recording head and temporarily stores the liquid to be supplied to the recording head; a liquid tank that communicates with the sub-tank and is able to be filled with the liquid; a first atmosphere opening unit that is provided in the liquid tank; and a second atmosphere opening unit that is provided in the sub-tank. The second atmosphere opening unit is closable when the liquid tank is filled with the liquid, and the first atmosphere opening unit and the second atmosphere opening unit are able to open the liquid tank and the sub-tank to the atmosphere, respectively, when the sub-tank is filled with the liquid filled in the liquid tank by a hydraulic head pressure.

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Yokohama, Japan

Shimpei Yoshikawa