Abstract: A liquid ejection head includes a liquid ejection section including an element substrate having ejection ports for ejecting liquid and an electrical wiring substrate connected to a contact of the liquid ejection apparatus to transmit signals to the element substrate, a liquid tank loading section including a containing space for containing a liquid tank storing liquid to be supplied to the element substrate and a lock member having an engaging part for engaging with a holding part of the liquid tank and a fixation means for rigidly securing the liquid election section and the liquid tank loading section in position.

Abstract: A liquid ejection head includes a recording element substrate for ejecting liquid, a mounting section to be loaded with a liquid container, and a connector equipped with a contact spring capable of expanding and contracting in an axial direction to be brought into contact with a contact substrate provided on the liquid container. The axial direction of the contact spring being inclined relative to the direction of loading the liquid container in the mounting section.

Abstract: A liquid ejection cartridge having a liquid ejection section for ejecting liquid includes an electrical contact section to be electrically connected to a terminal section of an apparatus main body, the electrical contact section being formed by a plurality of printed substrates arranged on a same surface.

Abstract: A liquid ejection head including: an ejection section for ejecting liquid; an electrical wiring substrate having terminals to be electrically connected to the respective electrical contacts of a liquid ejection apparatus; a first loading section to be loaded with a first liquid storing container; and a second loading section to be loaded with a second liquid storing container having a width greater than the first liquid storing container; the wall of the liquid ejection head being provided with a rib extending in the height direction on the surface opposite to the surface mounted by the electrical wiring substrate; the second loading section and the rib being arranged at respective positions where the second loading section and the rib overlap with each other as viewed in the direction of loading the second liquid storing container in the second loading section.

Abstract: A liquid ejection head includes a recording element substrate having an ejection port, a support member having a recessed portion and supporting the recording element substrate by a bottom portion of the recessed portion, wiring electrically connected to the recording element substrate and extending between the recording element substrate and a side surface of the recessed portion, a sealant with which the wiring is covered, and a passage formed in the support member and allowing a first region where the sealant is placed and a second region different from the sealed region to communicate with each other.

Abstract: A recessed portion is provided on a shorter side of a rectangular liquid supply passage. Thereby a flow pathway by the recessed portion can be ensured, and even in a case where the air bubble is trapped to be closer to and in contact with one end of the liquid supply passage, a difference in flow resistance to two ink flows generated in this state can be made small. In this way, the flow speeds of the inks flowing in the periphery of the air bubble can be made small as a whole, and as a result, it is possible to suppress an ejection failure due to transfer of the air bubble to the ejection opening side or the like.

Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.

Abstract: A liquid ejection head includes a recording element substrate provided with elements formed on one surface of the substrate for generating energy for ejecting liquid as well as first and second supply ports each piercing between both surfaces of the substrate for supplying the liquid to the elements; and a support member provided with first and second liquid storage portions, first and second communication paths that respectively allow the first and the second supply ports to communicate with the first and second liquid storage portions, the support member supporting the other surface of the substrate. The length of the first communication path is longer than that of the second communication path. The horizontal cross-sectional area of the first communication path in a direction perpendicular to the liquid supply direction is larger than that of the second communication path.

Abstract: A liquid ejection head including a recording element substrate provided with an element formed on one surface of the substrate for generating energy for ejecting liquid as well as a first and a second supply port each piercing between both surfaces of the substrate for supplying the liquid to the element; a support member provided with a first and a second liquid storage portion, a first and a second communication path that respectively allows the first and the second supply port to communicate with the first and the second liquid storage portion, the support member supporting the other surface of the substrate. The length of the first communication path is longer than that of the second communication path. The horizontal cross-sectional area of the first communication path in a direction perpendicular to the liquid supply direction is larger than that of the second communication path.

Abstract: A liquid ejection head includes a recording element substrate having an ejection port, a support member having a recessed portion, and supporting the recording element substrate by a bottom portion of the recessed portion, wiring electrically connected to the recording element substrate and extending between the recording element substrate and a side surface of the recessed portion, a sealant with which the wiring is covered, and a passage formed in the support member, and allowing a first region where the sealant is placed, and a second region different from the sealed region to communicate with each other.

Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.

Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.

Abstract: A method includes preparing a liquid ejection recording head that includes a substrate including an element generating energy used to eject liquid, a first supporting portion supporting the substrate, a wiring member including a plurality of electrode leads connected to a plurality of electrode pads provided for the substrate, and a second supporting portion supporting the wiring member, the wiring member including a vent that communicates with a region defined by the substrate, the first supporting portion, and the electrode leads and also communicates with an atmosphere, applying a sealing member to surfaces of the electrode leads, and sucking air in the region through the vent to introduce the sealing member into the region.

Abstract: An ink cartridge including a housing formed with a resin and an ink stored in the housing, wherein the resin includes a white mica composition; the ink includes a salt and a self-dispersible pigment having a functional group that contains two phosphonic acid groups and is bonded to the particle surface thereof; the salt includes a specific cation and a specific anion; and an amount of calcium in the ink after the ink is preserved in the housing at 60° C. for 2 months is 10.0 ppm or less.

Abstract: A printing head includes a printing element substrate that is hard to be deformed even if the printing head falls by mistake. The printing head comprises element substrate in which an energy generating element for generating energy used for ejecting ink is provided, a first sheet-shaped portion to which the element substrate is provided, a second sheet-shaped portion provided away from the first sheet-shaped portion at an opposite side to a direction of ejecting the ink in relation to the first sheet-shaped portion, and a sheet-shaped wall member connecting the first sheet-shaped portion to the second sheet-shaped portion, wherein the wall member has a thickness of a portion connected to the second sheet-shaped portion, which is larger than a thickness of a portion connected to the first sheet-shaped portion.

Abstract: A printing head, which can suppress the occurrence of cracks in a printing element substrate, even if accidentally dropped, includes the printing element substrate, an ink flow passage and a sheet-shaped portion comprising a rectangular major surface. A rear surface side of the major surface of the sheet-shaped portion is provided with a space formed separately from the ink flow passage. A surface adjacent to the major surface is provided with an opening of the space formed therein, and the sheet-shaped portion is provided with a concave portion formed on the rear surface side of two regions between the printing element substrate and two corner portions arranged proximate to the opening.

Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.

Abstract: A method includes preparing a liquid ejection recording head that includes a substrate including an element generating energy used to eject liquid, a first supporting portion supporting the substrate, a wiring member including a plurality of electrode leads connected to a plurality of electrode pads provided for the substrate, and a second supporting portion supporting the wiring member, the wiring member including a vent that communicates with a region defined by the substrate, the first supporting portion, and the electrode leads and also communicates with an atmosphere, applying a sealing member to surfaces of the electrode leads, and sucking air in the region through the vent to introduce the sealing member into the region.

Abstract: There is provided a printing head, enabling to suppress the occurrence of cracks in a printing element substrate, even if the printing head is erroneously fallen. The printing head comprises: a printing element substrate, an ink flow passage and a sheet-shaped portion comprising a rectangular major surface. A rear surface side of the major surface of the sheet-shaped portion is provided with a space formed separately from the ink flow passage. A surface adjacent to the major surface is provided with an opening of the space formed therein, and wherein the sheet-shaped portion is provided with a concave portion formed on the rear surface side of two regions between the printing element substrate and two corner portions arranged proximate to the opening in the major surface.

Abstract: There is provided a printing head in which a printing element substrate is hard to be deformed even if the printing head falls by mistake. The printing head comprises an element substrate in which an energy generating element for generating energy used for ejecting ink is provided, a first sheet-shaped portion to which the element substrate is provided, a second sheet-shaped portion provided away from the first sheet-shaped portion at an opposite side to a direction of ejecting the ink in relation to the first sheet-shaped portion, and a sheet-shaped wall member connecting the first sheet-shaped portion to the second sheet-shaped portion, wherein the wall member has a thickness of a portion connected to the second sheet-shaped portion, which is larger than a thickness of a portion connected to the first sheet-shaped portion.