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 apparatus of the invention is a liquid ejection apparatus including a liquid storage container that stores liquid, a circulation mechanism that circulates liquid in a circulation path, and a liquid ejection head fluidly-connected to the liquid storage container, the liquid ejection head having a plurality of ejection openings, wherein the liquid ejection head includes at least a pair of common passages and a plurality of individual passages that connect one of the pair of common passages to the other one of the pair of common passages and communicate with the plurality of ejection openings, respectively, and at least a pair of pressure adjustment mechanisms whose pressures are set to different control pressures is connected to respective upstream sides or downstream sides of the pair of common passages.

Abstract: A liquid ejection head capable of suppressing a change in pressure of a pressure chamber, a liquid ejection apparatus, and a manufacturing method are provided. For that reason, a lid member is formed on a wafer-shaped element board and the element board is cut into chips to manufacture a print element board.

Abstract: A liquid ejection head includes first and second recording element boards having recording elements for generating energy to be utilized for ejection of liquid, first and second support members for respectively supporting the first and second recording element boards, and a flow channel forming member carrying thereon the first and second support members arranged side by side. The edge of the first recording element board located at the side of the second recording element board projects toward the second recording element board from the edge of the first support member located at the side of the second support member.

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 discharge head includes discharge orifices, recording elements that generate energy, supply channels that supply liquid to the recording elements, a common supply channel communicating with the supply channels, recovery channels that recover liquid supplied to the recording elements, a common recovery channel that recovers liquid from the recovery channels, a first inlet port that supplies liquid to the common supply channel, a first recovery port that recovers liquid from the first common supply channel, a second inlet port that supplies liquid to the common recovery channel, and a second recovery port that recovers liquid from the second common recovery channel. The first inlet port and the first recovery port communicate without going through channel portions where recording elements are disposed, and the second inlet port and the second recovery port communicate without going through channel portions where recording elements are disposed.

Abstract: A first passage layer is provided with a plurality of supply passages each communicating with one portion of each of a plurality of pressure chambers and a plurality of collection passages each communicating with the other portion of each of the plurality of pressure chambers. A second passage layer is provided with a common supply passage communicating with the plurality of supply passages and a common collection passage communicating with the plurality of collection passages.

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: A liquid discharge head includes: a plurality of recording element boards each having a plurality each of discharge orifices configured to discharge liquid, liquid supply channels configured to supply liquid to the discharge orifices, and liquid recovery channels configured to recover liquid supplied from the liquid supply channels; a common supply channel communicating with at least one liquid supply channel of the recording element boards and configured to supply liquid to the plurality of recording element boards; and a common recovery channel communicating with at least one liquid recovery channel of the recording element boards and configured to recover liquid from the plurality of recording element boards.

Abstract: A liquid discharge head includes: a recording element board including a discharge orifice configured to discharge liquid, a recording element configured to generate energy to discharge liquid, a pressure chamber having the recording element within, a liquid supply channel configured to supply liquid to the pressure chamber, and a liquid recovery channel configured to recover liquid from the pressure chamber; and a support member configured to support the recording element board, the support member including a supply chamber configured to supply liquid to the liquid supply channel, and a recovery chamber configured to recover liquid from the liquid recovery channel. An inner volume of the recovery chamber is smaller than an inner volume of the supply chamber.

Abstract: A recording apparatus including an ink tank and a recording head having a flow path forming portion that has an ejection orifice plate having plural ink ejection orifices and a liquid chamber provided for each orifice to supply ink to the orifices, and an energy generating element for ejecting ink in the chamber. A surface layer of the flow path forming portion opposes to the outside of the plate. An opening is provided opposing to the orifices in the surface layer. An ink reservoir is provided between the plate and the opening. A circulation flow path communicating with the ink reservoir is provided. The area of the opening is larger than that of the orifice. Both ends of the circulation flow path are respectively connected to inlet and outlet portions connected to the circulation flow path. The inlet and outlet portions and liquid chamber are connected to the ink tank.

Abstract: There are provided a liquid ejection head with a member in which a space for suctioning and holding an element substrate is sufficiently ensured, a liquid ejecting apparatus provided with the liquid ejection head, and a method for manufacturing the liquid ejection head. The print head includes a support member that supports a print element substrate, and a first member to which the print element substrate is attached and that is attached to the support member. The first member has a suction region to be held at the time of being attached to the support member.

Abstract: A recording apparatus including an ink tank and a recording head having a flow path forming portion that has an ejection orifice plate having plural ink ejection orifices and a liquid chamber provided for each orifice to supply ink to the orifices, and an energy generating element for ejecting ink in the chamber. A surface layer of the flow path forming portion opposes to the outside of the plate. An opening is provided opposing to the orifices in the surface layer. An ink reservoir is provided between the plate and the opening. A circulation flow path communicating with the ink reservoir is provided. The area of the opening is larger than that of the orifice. Both ends of the circulation flow path are respectively connected to inlet and outlet portions connected to the circulation flow path. The inlet and outlet portions and liquid chamber are connected to the ink tank.

Abstract: A recording apparatus including an ink tank and a recording head having a flow path forming portion that has an ejection orifice plate having plural ink ejection orifices and a liquid chamber provided for each orifice to supply ink to the orifices, and an energy generating element for ejecting ink in the chamber. A surface layer of the flow path forming portion opposes to the outside of the plate. An opening is provided opposing to the orifices in the surface layer. An ink reservoir is provided between the plate and the opening. A circulation flow path communicating with the ink reservoir is provided. The area of the opening is larger than that of the orifice. Both ends of the circulation flow path are respectively connected to inlet and outlet portions connected to the circulation flow path. The inlet and outlet portions and liquid chamber are connected to the ink tank.

Abstract: The present invention provides a recording head that has a driving circuit performing driving by dividing a plurality of heaters into a plurality of blocks and supplying electric current on a block-by-block basis based on recording data; a constant current source applying a common bias current to each temperature sensor group obtained by dividing temperature sensors disposed in correspondence to each heater of a plurality of heaters into blocks; a voltage output circuit having a switching element that turns electric current supply to the temperature sensors of the selected temperature sensor group ON and OFF, and obtaining a voltage generated at both terminals of the selected temperature sensor by supplying an electric current to the temperature sensor; and an amplifier circuit amplifying the detection voltages.

Abstract: A recording apparatus including an ink tank and a recording head having a flow path forming portion that has an ejection orifice plate having plural ink ejection orifices and a liquid chamber provided for each orifice to supply ink to the orifices, and an energy generating element for ejecting ink in the chamber. A surface layer of the flow path forming portion opposes to the outside of the plate. An opening is provided opposing to the orifices in the surface layer. An ink reservoir is provided between the plate and the opening. A circulation flow path communicating with the ink reservoir is provided. The area of the opening is larger than that of the orifice. Both ends of the circulation flow path are respectively connected to inlet and outlet portions connected to the circulation flow path. The inlet and outlet portions and liquid chamber are connected to the ink tank.

Abstract: A recording apparatus including an ink tank and a recording head having a flow path forming portion that has an ejection orifice plate having plural ink ejection orifices and a liquid chamber provided for each orifice to supply ink to the orifices, and an energy generating element for ejecting ink in the chamber. A surface layer of the flow path forming portion opposes to the outside of the plate. An opening is provided opposing to the orifices in the surface layer. An ink reservoir is provided between the plate and the opening. A circulation flow path communicating with the ink reservoir is provided. The area of the opening is larger than that of the orifice. Both ends of the circulation flow path are respectively connected to inlet and outlet portions connected to the circulation flow path. The inlet and outlet portions and liquid chamber are connected to the ink tank.

Abstract: A printing apparatus and ink discharge failure detection method capable of precisely detecting temperature information corresponding to each nozzle are provided. Temperatures of respective electrothermal transducers (heaters) are measured on the basis of outputs from a plurality of sensors corresponding to the respective heaters. The temperatures of the heaters at a predetermined timing during a printing operation are predicted on the basis of the temperature change profiles of the respective heaters that are generated by energizing the heaters. A plurality of thresholds corresponding to nozzle states are generated on the basis of the predicted temperatures and the driving conditions of an inkjet printhead, and it is controlled to execute temperature measurement at the predetermined timing. A temperature measured under the control is compared with the respective generated thresholds, and the nozzle state is identified on the basis of the comparison results.

Abstract: A recording head includes electrothermal transducers associated with temperature sensing elements. A method for driving the recording head includes supplying driving energy to the electrothermal transducer, and evaluating a temperature change in a temperature fall interval, occurring after supplying of driving energy to the electrothermal transducer, based on temperature information acquired from the temperature sensing element. The method further includes changing a setting value of the driving energy supplied to the electrothermal transducer, determining an energy value for driving the electrothermal transducer based on the evaluated temperature change and an energy value supplied to the electrothermal conversion element, and recording data on a recording medium by driving the electrothermal transducer according to the determined energy value.

Abstract: In an ink jet recording apparatus using a recording head that discharges ink by applying thermal energy produced in response to driving a heater to ink, a change in temperature occurring when the heater is driven is measured by a temperature sensor disposed directly below the heater. A discharge state for each nozzle can be determined by determination as to whether an inflection point is present in a curve representing the change in temperature occurring after the driving for discharging ink.