Abstract: A liquid ejection apparatus includes a liquid ejection head which is provided with a pressure chamber having, in the inside thereof, an energy-generating element, a transfer body onto which a liquid is ejected through the liquid ejection head to form an image, and a pressing unit which presses a recording medium against the transfer body to transfer the image formed on the transfer body onto the recording medium, wherein the liquid ejection apparatus further includes a heating unit for heating the transfer body during a period from the ejection of the liquid through the liquid ejection head and until the pressing of the recording medium by means of the pressing unit, and the liquid in the pressure chamber in the liquid ejection head is circulated between the pressure chamber and the outside of the pressure chamber.

Abstract: Provided is a liquid ejection head comprising: an ejection opening row along a first direction; a pressure chamber with print-element; a passage communicating with the pressure chamber; a supply opening row along the first direction with supply openings extending in a second direction to supply liquid to the passage; a collection opening row along the first direction with collection openings extending in the second direction to collect a liquid from the passage; a first common supply passage along the first direction to supply a liquid to the supply opening row; a first common collection passage along the first direction to collect a liquid from the collection opening row; a first supply side communication opening extending in the second direction to supply a liquid to the first common supply passage; and a first collection side communication opening extending in the second direction to collect a liquid from the first common collection passage, wherein at least one of the first supply side communication openi

Abstract: A liquid ejection head includes an ejection orifice for ejecting a liquid; a flow path in which an energy generating element is disposed, generates an energy to be used for ejecting the liquid; a liquid inside the flow path; an ejection orifice part that allows the ejection orifice and the flow path to communicate with each other; a supply flow path for supplying the liquid from the outside; and a recovery flow path for recovering the liquid to the outside. The moisture content of the liquid is 65 wt % or less. The liquid inside the flow path is circulated between the inside and the outside of the flow path.

Abstract: A liquid ejection head includes a nozzle including an ejection port for ejecting a liquid for performing recording on a recording medium, and a pressure chamber in which an energy generating element that generates energy used for ejecting the liquid from the ejection port is disposed; and a heating unit that heats the liquid. In the liquid ejection head, the liquid in the pressure chamber is circulated to and from the outside of the pressure chamber, and an average number of preliminary ejections per nozzle during an operation period in which the recording is performed is equal to or greater than 0 and equal to or less than 20.

Abstract: A liquid discharge head includes a discharge port; a flow passage; a discharge port part; a supply flow passage; and a recovery flow passage. The flow passage, the supply flow passage, and the recovery flow passage are configured such that the liquid inside the flow passage is capable of being circulated between the inside of the flow passage and the outside of the flow passage. An opening of the discharge port is configured such that a liquid surface of the liquid within the opening of the discharge port has a first region and that a second region, and a viscosity of the liquid in the first region is 1.2 or more times higher than a viscosity of the liquid in the second region.

Abstract: A liquid ejection head is capable of performing high-speed ejection operation as well as reducing a depth dimension. For this purpose, in a configuration in which flexible circuits electrically connect element substrates to electrical substrates, the electrical substrates are arrayed in two lines along a plane different from a plane on which the element substrates are arrayed and the flexible circuits electrically connect the element substrates to the electrical substrates while being bent.

Abstract: A liquid ejection head includes a recording element substrate which ejects a liquid downward; an electric substrate which is disposed above the recording element substrate, which has a plurality of electric components, including a capacitor, and which is electrically connected to the recording element substrate; a wall which covers the electric substrate such that a liquid can be retained between the wall and the electric substrate; and a sensor which is disposed in an area covered by the wall and which detects for the presence of a liquid. In the attitude of the liquid ejection head as attached to the main unit of a liquid ejection apparatus, the sensor is disposed below the capacitor in a vertical direction.

Abstract: A liquid discharge head includes a recording element substrate including a discharge port. A channel member is configured to supply the recording element substrate with a liquid. An electric wiring board is configured to supply the recording element substrate with power. A plate-like protective member is directly or indirectly fixed to the channel member. In a case where a direction in which the recording element substrate is viewed from the channel member is defined as downward, the protective member includes a first bent portion configured to be bent in a transverse direction of the liquid discharge head. The first bent portion is located at a position that is above an upper end of the channel member and below a midpoint of a line segment connecting the upper end of the channel member and an upper end of the protective member.

Abstract: An ink jet recording method of the present invention includes: forming an ink image by ejecting an ink onto a transfer body with an ink jet head in which a recording element substrate provided with an element generating energy to be used for ejecting the ink, a pressure chamber including the element inside, and an ejection orifice ejecting the ink is provided, and the ink in the pressure chamber is circulated between the pressure chamber and the outside of the pressure chamber; and transferring the ink image onto a recording medium by bringing the recording medium into contact with the transfer body on which the ink image is formed, wherein a viscosity of the ink is 2 mPa·s or more to 20 mPa·s or less.

Abstract: A liquid ejection head has a plurality of ejection modules having a recording element substrate equipped with a plurality of ejection orifices for ejecting a liquid, a plurality of first flow path members that supports at least one of the ejection modules and a second flow path member provided in common with the first flow path members and supporting the first flow path members. The first flow path members and the second flow path member are equipped with a flow path for supplying a plurality of recording element substrates with a liquid. The first flow path members are joined with the second flow path member via an adhesive layer without being brought into direct contact with the second flow path member.

Abstract: In order that the interior of a cap member, in a case where the cap member abuts to a cover member, is allowed to have improved airtightness so that the cap member can sufficiently function, a sealing member is used to seal between the cover member and first and second flow path members for retaining the cover member.

Abstract: An inkjet print head includes an ejection module having a printing element substrate that ejects ink to a print medium and a flexible wiring substrate electrically connected to the printing element substrate; and a member for supporting the ejection module by joining, wherein the flexible wiring substrate has a capacitor, a periphery of the capacitor being covered with a sealing agent, and the capacitor is provided in a recess formed on the member.

Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration or viscosity change. The invention provides a printing apparatus that uses a liquid ejection head including an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein, the printing apparatus including: a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber; and a concentration adjustment unit configured to adjust a concentration of a liquid inside a liquid circulation system by discharging the liquid from the inside of the liquid circulation system and replenishing the liquid into the liquid circulation system from the outside of the liquid circulation system in response to the amount of the discharged liquid.

Abstract: An inkjet recording method of the present invention comprises forming an ink image by ejecting ink on an ejection receiving medium by an inkjet head including a recording element substrate having an energy generation element, a pressure chamber, and an ejection port, wherein the ink is circulated between the inside of the pressure chamber and the outside of the pressure chamber; and removing at least a portion of a liquid component from the ink image by bringing a liquid absorbing member into contact with the ink image, wherein the ink contains 5 to 30 mass % of a water-soluble organic solvent having a bp of 110° C. or more, and 50 mass % or more of the water-soluble organic solvent contained in the ink image and having a bp of 110° C. or more is removed from the ink image in the removal of at least a portion of a liquid component from the ink image.

Abstract: An ink jet recording method of the present invention includes: forming an ink image by ejecting an ink onto a transfer body with an ink jet head in which a recording element substrate provided with an element generating energy to be used for ejecting the ink, a pressure chamber including the element inside, and an ejection orifice ejecting the ink is provided, and the ink in the pressure chamber is circulated between the pressure chamber and the outside of the pressure chamber; and transferring the ink image onto a recording medium by bringing the recording medium into contact with the transfer body on which the ink image is formed, wherein a viscosity of the ink is 2 mPa·s or more to 20 mPa·s or less.

Abstract: A liquid discharge head includes a recording element board including multiple discharge orifices configured to discharge liquid, multiple pressure chambers that communicate with the multiple discharge orifices via discharge channels, and have therein recording elements configured to generate energy used to discharge liquid, a liquid supply channel configured to supply liquid to the multiple pressure chambers, and a liquid recovery channel configured to recover liquid from, the multiple pressure chambers. The multiple pressure chambers communicate with the liquid supply channel and the liquid recovery channel so that liquid flows through the multiple pressure chambers. The direction of flow of liquid in the multiple pressure chambers is the same direction.

Abstract: A liquid ejection head and a liquid ejection apparatus capable of maintaining high reliability include a first cover member including an aperture and covering a surface of a flow path member facing a print medium of the liquid ejection head, a second cover member covering a side surface of the liquid ejection head, and a displacement absorption part that absorbs the displacement between the first cover member and the second cover member. Furthermore, the space between the aperture and the flow path member is sealed with a sealing material.

Abstract: A printhead comprises a print element substrate that includes a print element and a circuit board electrically connected to the print element substrate. An ink leakage detection unit, which includes a first electrode and a second electrode, and which is configured to detect ink leakage, is provided on the circuit board. At least one of the first electrode and the second electrode is electrically connected to a terminal of the print element substrate.

Abstract: 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.

Abstract: A supporting member includes a first supporting portion disposed on a first and second recording element substrate side, and a second supporting portion disposed on a side opposite to the first and second recording element substrate side with respect to the first supporting portion, the first supporting portion includes a first individual flow path for supplying liquid to a first recording element substrate, and a second individual flow path for supplying liquid to a second recording element substrate, and the second supporting portion includes a common flow path for supplying liquid to the first and second individual flow paths.