Canon Kabushiki Kaisha

Thk Co., Ltd.

Yoshihiro Hamada

Masaki Oikawa

Keiji Tomizawa

Yoshiyuki Nakagawa

Yasunori Takei

Atsushi Omura

Shuzo Iwanaga

Tadayoshi Inamoto

Isao Imamura

Hiroshi Yamada

Michinari Mizutani

Akiko Hammura

Hiroki Kihara

Toshikazu Nagatsuka

Kazuhiro Yamada

Toru Takahashi

Shingo Okushima

Nobuyuki Hirayama

Takaaki Yamaguchi

Takuya Hatsui

Toru Nakakubo

Takahiro Matsui

Masataka Sakurai

Koichi Ishida

Yutaka Kano

Takuro Yamazaki

Takatsugu Moriya

Masashi Hayashi

Makoto Sakurai

Tomotsugu Kuroda

Takeru Yasuda

Takuma Kodoi

Tomoko Kudo

Tomoki Ishiwata

Tomoyuki Tenkawa

Kentaro Muro

Monta Matsui

Ayako Iwasaki

Takahide Takeishi

Ryuichi Yamakoshi

So Aizawa

An aspect of the present disclosure is a liquid ejection apparatus including: a liquid ejection head including a conversion element that generates energy required to eject liquid, a first protection layer that blocks contact between the conversion element and the liquid, a second protection layer that partially covers the first protection layer and functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, and an ejection port that ejects the liquid, and a control unit configured to control a potential difference between the first electrode and the second electrode in printing to a predetermined value by changing at least one of potentials of the first electrode and the second electrode. The control unit sets the potential difference based on at least one of a condition and a configuration of the liquid ejection head.

Liquid ejection apparatus and control method

A recording apparatus includes: a liquid ejection head including a heating element, a first protection layer that blocks contact between the heating element and liquid, a second protection layer that covers at least a portion of the first protection layer to be heated by the heating element and that functions as a first electrode, a second electrode that is electrically connected to the first electrode through the liquid, an ejection port that ejects the liquid, and a temperature detection element that corresponds to the heating element, and a detection unit configured to detect a feature point in a temperature curve that indicates a relationship between time and temperature, in which a combination of a potential set for the first electrode and a potential set for the second electrode in a case where printing is performed varies from that in a case where the detection unit detects the feature point.

Recording apparatus and control method

A liquid ejection head that can suppress variation in the circulation flow rate or the pressure of the liquid among a plurality of pressure chambers and suppress a difference in temperature distribution between adjacent element substrates to suppress image unevenness includes a plurality of ejection modules including an element substrate in which a plurality of ejection orifices that eject a liquid are aligned in an array. In one ejection module of the ejection modules adjacent to each other, the liquid is supplied from one side of an ejection orifice array, and the liquid is collected from the other side of the ejection orifice array, and in the other ejection module of the ejection modules adjacent to each other, the liquid is supplied from the other side, and the liquid is collected from the one side.

Liquid ejection head and liquid ejection apparatus

In a liquid ejection head in which ejection modules are arrayed on a flow path forming member, each ejection module includes a recording element substrate provided on a support member. The recording element substrate includes a liquid supply channel, a liquid collection channel, and ejection ports. The support member includes supply-side liquid communication ports communicating with the liquid supply channel and collection-side liquid communication ports communicating with the liquid collection channel. The supply-side liquid communication ports and the collection-side liquid communication ports are alternately provided along the direction in which the ejection modules are arrayed. The closest pair of liquid communication ports in the adjacent ends of two adjacent ejection modules are both supply-side or collection-side liquid communication ports.

Liquid ejection head including a plurality of recording element substrates formed adjacent to each other to form an array such that a gap in temperature distribution is prevented

An image forming apparatuscapable of performing printing with a high image quality, and a control method of the image forming apparatusare provided. For this purpose, a threshold value Dt is preliminarily set that allows printing without occurrence of blur, for each of preliminarily set monitoring areas A. In the case where a print duty for each of the monitoring areas A has exceeded the threshold value Dt, an ejection frequency of ink and conveying speed of a print medium are reduced in association therebetween.

Image forming apparatus and control method of image forming apparatus

A multi-row rolling element housing band is provided which can promote an increase in the degree of precision of a guide. At least three rolling element rows () to () are arranged in a band (). Each second rolling element () of the second rolling element row () is displaced by P/n in a length direction of the band () from each first rolling element () of the first rolling element row (). Each third rolling element () of the third rolling element row () is displaced by P/n in the length direction of the band () from each second rolling element () of the second rolling element row (). P is the pitch between the first rolling elements (), and n is the number of rows.

Multi-row rolling element housing band and motion guide apparatus

A plurality of pressure chambers are formed in a circulation channel for liquid in order to array ejection ports in a high density in association with the circulation channel. The circulation channel is connected to a penetration supply path and a penetration recovery path that penetrate a substrate.

A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.

A liquid ejection head, including: a flow path forming member including a resin layer having an ejection orifice and a flow path formed therein; a substrate including a heat-generating resistance element for ejecting liquid and a protective layer having a portion for covering the heat-generating resistance element, a surface of the portion being exposed to the flow path; and an intermediate layer formed between the resin layer and the protective layer, the intermediate layer including a silicon carbonitride material.

Liquid ejection head and liquid ejection device, and aging treatment method and initial setup method for a liquid ejection device

A liquid discharge head includes a print element substrate provided with discharge ports, through which liquid is discharged; and a support member having a liquid chamber, which is provided with a communicating opening that communicates with the discharge ports, wherein the liquid chamber has a first surface provided with the communicating opening, and a second surface facing the first surface, the second surface is provided with a buffer chamber, which is a hollow space for storing gas, and the buffer chamber has, in the second surface, an opening having a projecting portion projecting toward the inner side of the opening.

Liquid discharge head

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.

Liquid ejecting method, liquid ejecting device, and liquid ejecting system

Provided is a motion guide apparatus including a track member with a rolling-element rolling surface and a moving member with a load rolling-element rolling surface, the moving member being movably assembled to the track member via a rolling element provided between the moving member and the track member, wherein: the cross-sectional shape of each of the rolling-element rolling and the load rolling-element rolling surfaces has a circular arc shape projecting in the direction that the rolling-element rolling surface and the load rolling-element rolling surface face each other; the rolling element has a drum-shaped cross-section with a diameter gradually reduced from both ends of the rolling element so as to correspond to the cross-sectional shape of the rolling-element rolling surface and the load rolling-element rolling surface; and the rolling-element rolling surface and the load rolling-element rolling surface configure an angular contact structure via the rolling element.

Motion guide apparatus

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.

Liquid ejection head

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.

Liquid ejection head, liquid ejection method, and printing apparatus employing this ejection head

A liquid ejection head includes ejection ports for ejecting liquid, recesses respectively accommodating the ejection ports in the insides thereof, ejection sections operating as passages directed to the respective ejection ports, and liquid channels for supplying the respective ejection sections with liquid. The ejection sections and the liquid channels are arranged in rows extending in respective directions that intersect each other, and the connection sections respectively connecting the ejection sections and the corresponding liquid channels represent an elliptic contour having a major axis and a minor axis as viewed from the corresponding one of the ejection ports, while the recesses also represent an elliptic contour having a major axis and a minor axis.

Growing community of inventors

Yokohama, Japan

Yoshihiro Hamada