Canon Kabushiki Kaisha

Shinji Kishikawa

Yoshiyuki Nakagawa

Akiko Saito

Shintaro Kasai

Ken Tsuchii

Shuzo Iwanaga

Masataka Sakurai

Koichi Ishida

Takatsugu Moriya

Akiko Hammura

Takayuki Sekine

Masafumi Morisue

Hiroki Hayashi

Tatsuo Nanjo

Masataka Nagai

Keisuke Kouno

Masahiko Kubota

Keiji Matsumoto

Tatsuya Yamada

Koji Sasaki

Seiichiro Yaginuma

Nobuhito Yamaguchi

Tamaki Sato

Atsunori Terasaki

Hiroshi Arimizu

Ryoji Kanri

Arihito Miyakoshi

Akihiko Okano

Tatsurou Mori

Akira Shibasaki

Atsushi Hiramoto

Yumi Kimura

A liquid cartridge includes: a valve unit configured to be movable to a position to close the atmosphere communication hole and a position to open the atmosphere communication hole; and a lever configured to fix the valve unit to the position to close the atmosphere communication hole by pressing the valve unit and configured to be capable of moving the valve unit to the position to open the atmosphere communication hole by removing the pressing against the valve unit, wherein the lever is configured to remove the pressing against the valve unit by moving in a direction intersecting a direction in which the valve unit moves.

Liquid cartridge and liquid ejection apparatus

A liquid discharge head includes a substrate, a pressure chamber through which a first liquid and a second liquid flow while being in contact with each other, a pressure generating element configured to pressurize the first liquid, and a discharge port configured to discharge the second liquid. The substrate has a first channel and a second channel that each extend through the substrate. The first channel is used to supply the first liquid to the pressure chamber. The second channel is used to supply the second liquid to the pressure chamber. A viscosity of the second liquid is greater than a viscosity of the first liquid. An average cross-section area of the second channel is greater than an average cross-section area of the first channel.

Liquid discharge head, liquid discharge apparatus, liquid discharge module, and manufacturing method for liquid discharge head

A liquid ejection head includes a liquid ejection face on which multiple ejection port arrays, each of which is formed with multiple ejection ports that eject liquid, are arranged. In the liquid ejection head, a first protrusion and a second protrusion, which have different sizes, are arranged in peripheral areas of the ejection port arrays on the liquid ejection face.

Liquid ejection head and liquid ejection apparatus

A liquid ejection head includes a liquid channel through which a first liquid and a second liquid flow in a predetermined direction, a first inlet port through which the first liquid flows into the liquid channel, a second inlet port through which the second liquid flows into the liquid channel, a pressure generation element which pressurizes the first liquid and an ejection orifice through which the second liquid is ejected by pressure received from the first liquid pressurized by the pressure generation element. A length of flow of the second liquid from the second inlet port to a position at which the second liquid is ejectable from the ejection orifice is shorter than a length of flow of the first liquid from the first inlet port to the position at which the second liquid is ejectable.

Liquid ejection head, liquid ejection apparatus and liquid ejection module

In a liquid ejection head, a substrate is provided with a first inflow port located on an upstream side of a pressure chamber with respect to a direction of flow of liquids in a liquid flow passage and configured to allow a first liquid to flow into the liquid flow passage, a second inflow port located on the upstream side of the first inflow port and configured to allow a second liquid to flow into the liquid flow passage, and a lateral wall extending in a direction of extension of the liquid flow passage. At least part of the lateral wall is located above the first inflow port. In the pressure chamber, the first liquid flows in contact with a pressure generating element while the second liquid flows closer to the ejection port than the first liquid does.

Liquid ejection head, liquid ejection module, and method of manufacturing liquid ejection head

A liquid discharge head includes a discharge port member including a discharge port, a flow path member including a pressure chamber and a liquid flow path, a substrate, and a structure that is arranged on the substrate on an upstream side of a center of the discharge port and that is configured to generate a flow of the liquid toward the discharge port. The liquid in the pressure chamber circulates. A position corresponding to a portion of the structure having a greatest height from a surface of the substrate is located on the upstream side of the center of the discharge port in a flow direction of the liquid. A thickness of the structure in a discharge direction of the liquid is 0.1 times or greater than a thickness of the liquid flow path in the discharge direction of the liquid.

Liquid discharge head and manufacturing method of the same

In a liquid discharge head, a first pump and a second pump are arranged inside a channel, the channel includes a pressure chamber including an energy generating element, and liquid inside the pressure chamber is circulatable between inside and outside of the pressure chamber by the first pump or the second pump. The first pump is arranged on one side relative to a midpoint of the channel in an extending direction of the channel, and the second pump is arranged on another side relative to the midpoint of the channel in the extending direction of the channel.

Liquid discharge head

A liquid discharge head includes a recording element configured to generate thermal energy and a discharge orifice disposed at a position facing the recording element. A bubble is generated in liquid by the thermal energy, liquid between the bubble and the discharge orifice is discharged from the discharge orifice by the pressure of the generated bubble, and the bubble communicates with the atmosphere on the outside of the discharge orifice.

Liquid discharge head and liquid discharge method

A recording element board includes a discharge orifice configured to discharge liquid, a pressure chamber communicating with the discharge orifice, a recording element configured to generate thermal energy to cause bubbling of the liquid, the recording element being disposed in the pressure chamber facing the discharge orifice, and a substrate on which the recording element is formed. When the recording element is driven and the liquid of within the pressure chamber is discharged, a generated bubble communicates with the atmosphere. A discharge orifice projection region where the discharge orifice has been projected on the substrate includes a region includes a region extending beyond a heat-generating region projection region where the heat-generating region of the recording element has been projected on the substrate, the outline of the discharge orifice projection region is circumscribed by the outline of the heat-generating region projection region.

Recording element board and liquid discharge head

Disclosed is a liquid discharge method of discharging liquid with a liquid discharge head having a heating surface that contacts and heats the liquid and a discharge port that faces the heating surface and discharges the liquid. The method includes heating the liquid through the heating surface to generate a bubble such that the bubble communicates with an atmosphere, thereby discharging the liquid. The liquid that is being discharged from the discharge port includes a trailing portion. The trailing portion moves toward the heating surface in response to a reduction in volume of the bubble and contacts the heating surface. The method further includes heating the trailing portion through the heating surface while the trailing portion is in contact with the heating surface, thereby generating a bubble.

Liquid discharge method and liquid discharge apparatus for heating a liquid through a surface to generate a bubble

A pressing method for pressing a surface of a resin layer includes pressing a surface of a resin layer of a wafer using a pressing member, which is to be divided into a plurality of liquid ejection head chips, the wafer including a substrate and the resin layer to serve as an ejection port forming member provided on the substrate. The pressing of the surface of the resin layer is performed by positioning a structure closer to a circumference of the wafer than to an area that becomes the plurality of liquid ejection head chips on the substrate, the structure being in contact with the resin layer.

Pressing method for surface of resin layer

A recording element substrate includes: a substrate on which a plurality of energy generating elements that generate energy used for ejecting liquid are arranged side by side, an ejection port forming member in which ejection ports are formed at positions corresponding to the plurality of energy generating elements, a plurality of supply passages which are channels extending in a thickness direction of the substrate and through which liquid is supplied to the energy generating elements, and a support member that is formed between the substrate and the ejection port forming member and supports the ejection port forming member, in which supply ports that are apertures of the plurality of supply passages are linearly arranged side by side on the substrate, and a plurality of support members are provided side by side between adjacent supply ports on the substrate in a direction in which the supply ports are aligned.

Recording element substrate and liquid ejection head

A liquid ejection method includes ejecting liquid from an ejection opening, using a liquid ejection head including a heating surface configured to heat the liquid and the ejection opening corresponding to the heating surface, by heating the liquid with the heating surface to produce a bubble communicating with air through the ejection opening such that at least a part of the heating surface is exposed to the air through the ejection opening, wherein the liquid is heated with the heating surface for 0.5 microseconds or shorter to produce a bubble communicating with the air through the ejection opening such that at least a part of the heating surface is exposed to the air through the ejection opening, in order to eject the liquid from the ejection opening.

Growing community of inventors

Tokyo, Japan

Shinji Kishikawa