Abstract: A printing apparatus includes: a conveyance unit configured to convey a printing medium in a conveyance direction; a first printing head configured to eject a first liquid onto the printing medium conveyed by the conveyance unit in a state where a distance between a first ejection surface where ejection ports are formed and the printing medium corresponds to a first distance; and a plurality of second printing heads each configured to eject a second liquid, which reacts upon coming into contact with the first liquid, onto the printing medium conveyed by the conveyance unit in a state where a distance between a second ejection surface where ejection ports are formed and the printing medium corresponds to a second distance smaller than the first distance, wherein the first printing head is provided upstream of the plurality of second printing heads in the conveyance direction.

Abstract: A liquid ejection head according to the present disclosure includes: a printing element substrate including an ejection surface provided with a first ejection orifice array in which an ejection orifice configured to be capable of ejecting a liquid is arranged in plurality in an array direction and a second ejection orifice array arranged in a direction intersecting with the array direction and the first ejection orifice array; and a protective member provided with a first opening corresponding to the first ejection orifice array and a second opening corresponding to the second ejection orifice array, wherein the protective member is arranged adjacent to the ejection surface of the printing element substrate via an adhesive arranged between the first ejection orifice array and the second ejection orifice array.

Abstract: There is provided a liquid ejection head including: a printing element board having an ejection surface in which an ejection orifice array is formed to eject liquid; and a protective member having an opening corresponding to the ejection orifice array, wherein the shape of the opening is an elongate shape having a longitudinal direction and a lateral direction in the case of viewing from the ejection surface, the opening has a first side surface parallel to the longitudinal direction and a second side surface parallel to the transverse direction, and the protective member s fixed to the ejection surface such that the first side surface has a first inclination angle with the ejection surface.

Abstract: Ink is circulated through a circulation flow path between a print head and an ink tank. Detection operation for detecting an ink ejection state in an ejection opening in the print head is performed. The ink circulation and the detection operation are simultaneously performed by performing the detection operation in response to a start of the ink circulation.

Abstract: Ink is circulated through a circulation flow path between a print head and an ink tank. Detection operation for detecting an ink ejection state in an ejection opening in the print head is performed. The ink circulation and the detection operation are simultaneously performed by performing the detection operation in response to a start of the ink circulation.

Abstract: Although a conventional method of inspecting an ink discharge state in which the temperature change of the heater is detected enables accurate and high-speed inspection, due to the situation in which the inspection was performed, appropriate post-processing depending on the situation cannot be executed based on a result of the inspection. Therefore, it is necessary to determine the ink discharge state in detail. A plurality of modes are provided in accordance with the purpose of performing an inspection of the ink discharge state, and a discharge inspection threshold is provided for each of these modes. By selectively executing or continuously executing these modes, it is possible to determine the ink discharge state in more detail.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: A recording apparatus includes a recording head including a plurality of ejection ports and a recording element, a driving unit configured to apply a driving pulse to drive the recording element, a temperature detection unit configured to detect a temperature change in a vicinity of the recording element, a determination unit configured to determine an ink ejection state of each of the ejection ports on the basis of the temperature change detected by the temperature detection unit, an acquisition unit configured to acquire information about atmospheric pressure around the recording head, and a setting unit configured to, when the determination unit determines the ink ejection state, set the driving pulse to be applied by the driving unit to the recording element on the basis of the information about the atmospheric pressure acquired by the acquisition unit.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value, based on the first and second information.

Abstract: Although a conventional method of inspecting an ink discharge state in which the temperature change of the heater is detected enables accurate and high-speed inspection, due to the situation in which the inspection was performed, appropriate post-processing depending on the situation cannot be executed based on a result of the inspection. Therefore, it is necessary to determine the ink discharge state in detail. A plurality of modes are provided in accordance with the purpose of performing an inspection of the ink discharge state, and a discharge inspection threshold is provided for each of these modes. By selectively executing or continuously executing these modes, it is possible to determine the ink discharge state in more detail.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element includes calculating a difference value between a value obtained by statistics of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: Ink is circulated through a circulation flow path between a print head and an ink tank. Detection operation for detecting an ink ejection state in an ejection opening in the print head is performed. The ink circulation and the detection operation are simultaneously performed by performing the detection operation in response to a start of the ink circulation.

Abstract: Although a conventional method of inspecting an ink discharge state in which the temperature change of the heater is detected enables accurate and high-speed inspection, due to the situation in which the inspection was performed, appropriate post-processing depending on the situation cannot be executed based on a result of the inspection. Therefore, it is necessary to determine the ink discharge state in detail. A plurality of modes are provided in accordance with the purpose of performing an inspection of the ink discharge state, and a discharge inspection threshold is provided for each of these modes. By selectively executing or continuously executing these modes, it is possible to determine the ink discharge state in more detail.

Abstract: Ink is circulated through a circulation flow path between a print head and an ink tank. Detection operation for detecting an ink ejection state in an ejection opening in the print head is performed. The ink circulation and the detection operation are simultaneously performed by performing the detection operation in response to a start of the ink circulation.

Abstract: A printing apparatus using a printhead that includes an inspection circuit for inspecting an ink discharge status for each nozzle performs an inspection processing. The apparatus selects a nozzle as a target of inspection of the ink discharge status, sets a threshold value for inspecting a detection result of a temperature detection element corresponding to the selected nozzle, and uses the inspection circuit and the set threshold value. The apparatus receives, from the printhead, an inspection result for the selected nozzle, determines, based on the received inspection result, a threshold value to be used by the inspection circuit for inspecting the discharge status of the selected nozzle in a subsequent inspection, and stores the determined threshold value in a memory.

Abstract: A recording apparatus includes a recording head including a plurality of ejection ports and a recording element, a driving unit configured to apply a driving pulse to drive the recording element, a temperature detection unit configured to detect a temperature change in a vicinity of the recording element, a determination unit configured to determine an ink ejection state of each of the ejection ports on the basis of the temperature change detected by the temperature detection unit, an acquisition unit configured to acquire information about atmospheric pressure around the recording head, and a setting unit configured to, when the determination unit determines the ink ejection state, set the driving pulse to be applied by the driving unit to the recording element on the basis of the information about the atmospheric pressure acquired by the acquisition unit.

Abstract: A method for inspecting an ink discharge status based on a temperature change of an energy generating element comprises: calculating a difference value between a value obtained by statistics of pieces of information indicating ink discharge statuses obtained for a plurality of nozzles close to a target nozzle and the information obtained for the target nozzle; comparing the calculated difference value with a predetermined threshold; and judging the ink discharge status for the target nozzle based on a result of the comparison. This enables to appropriately detect a nozzle which is in a discharge failure status due to an ink droplet adhered to a discharge surface of a printhead or the like.

Abstract: An image forming apparatus includes a printhead in which a plurality of element substrates for discharging a print material are arranged; a heating unit that maintains a temperature within the element substrate at a target temperature for each of the plurality of element substrates; a detection unit that detects the temperature within the element substrate for each of the plurality of element substrates; and a control unit that, for each of the plurality of element substrates, compares a highest temperature within the element substrate that is detected by the detection unit with a predetermined threshold, and if the highest temperature exceeds the predetermined threshold, sets the target temperature for the element substrate at a temperature which is higher than a target temperature set when the highest temperature does not exceed the predetermined threshold and lower than the predetermined threshold.

Abstract: An object of the present disclosure is to acquire an accurate temperature of a print head. The present disclosure is an ink jet printing apparatus comprising a print head, a transmission unit configured to transmit a control signal, and a detection unit configured to detect a temperature by reading an output of a Di sensor after the transmission, and as drive conditions for driving a printing element, there is a plurality of drive conditions whose driving cycle of the printing element is different from one another, within a predetermined period in length in accordance with the driving cycle, transmission of a control signal and temperature detection are performed, a part of a line used for transmission of the control signal and a part of a line connected with the Di sensor are in common.