Abstract: A liquid ejection head includes a substrate that carries thereon a plurality of ejection energy generating elements arranged in rows to generate energy necessary for ejecting liquid and an ejection port plate that is laid on the substrate and has a plurality of ejection ports formed therein and arranged vis-a-vis the respective ejection energy generating elements. The ejection port plate has a groove, or an oblong recess, formed on the surface thereof where the plurality of ejection ports are formed such that the groove surrounds the region where the ejection ports are formed and has a corrugated inner lateral surface and a flat outer lateral surface arranged oppositely relative to the inner lateral surface.

Abstract: A manufacturing method of a liquid ejection head includes a step of performing a first exposure to form a first ejection orifice row and a step of performing a second exposure to form a second ejection orifice row in which ejection orifices are arranged in a row with ejection orifices that form the first ejection orifice row through a connection portion. In an ejection orifice row formed by the first and the second ejection orifice rows, regarding the distances between the centers of ejection orifices in an arrangement direction of the ejection orifices on opening surfaces of the ejection orifices, the ejection orifices are formed so that a distance between the centers of two ejection orifices adjacent to each other with the connection portion in between is longer than a distance between the centers of two ejection orifices adjacent to each other without the connection portion in between.

Abstract: A liquid container detachably mountable to first and second locking portions of a mounting portion of an apparatus. The liquid container includes a casing for containing liquid and a supply port for supplying the liquid to an ink jet head. At respective first and second sides of the casing, first and second engaging portions are provided, respectively engageable with the first and second locking portions. A supporting member displaceably supports the second engaging portion, and a contact is contactable to a member provided in the mounting portion to permit of display information relating to the liquid container. The supply port is disposed in a third side of the casing which is between the first and second sides, and the contact is disposed at a corner region between the second and third sides.

Abstract: A liquid discharging head is configured including an element substrate and a flow path forming substrate which are joined. The element substrate includes a plurality of energy generating elements (electrothermal conversion elements) configured to generate thermal energy, and a supply port configured to supply liquid. The flow path forming substrate includes a plurality of discharging ports, a bubble generating chamber formed so as to include an energy generating element, and a supply path which connects the bubble generating chamber and the supply port. The upstream side of the discharging port in the direction of liquid flowing from the supply path to the bubble generating chamber, as viewed from a planar view, is formed in a semicircular shape, and the downstream side is formed in a semi-polygonal shape.

Abstract: A liquid container detachably mountable to first and second locking portions of a mounting portion of an apparatus. The liquid container includes a casing for containing liquid and a supply port for supplying the liquid to an ink jet head. At respective first and second sides of the casing, first and second engaging portions are provided, respectively engageable with the first and second locking portions. A supporting member displaceably supports the second engaging portion, and a contact is contactable to a member provided in the mounting portion to permit of display information relating to the liquid container. The supply port is disposed in a third side of the casing which is between the first and second sides, and the contact is disposed at a corner region between the second and third sides.

Abstract: A flexible wiring substrate that is used in a liquid ejection head having an element substrate provided with energy generating elements for generating energy for ejecting liquid includes: a bending portion; a base member including resin; electrical wiring lines formed on the base member and electrically connected to the element substrate, the electrical wiring lines extending over a ridge of the bending portion; and a metal layer that is arranged on an area of the base member in which no electrical wiring lines are provided and that is not electrically connected to the element substrate, the metal layer extending over the ridge.

Abstract: A primary flow path forming member is provided with a groove which becomes a recording liquid supply path on a bottom surface thereof. A second flow path forming member is provided with an arm portion. The arm portion of the second flow path forming member is used as a cap for closing the opening of the groove which becomes the liquid supply path formed on the bottom surface of the prime flow path forming member. The primary flow path forming member and the second flow path forming member as described above are formed by injection-molding and bonded with each other by a bonding member. The bonding member is formed to cover a portion where the opening edge of the groove which becomes the recording liquid supply path, in the primary flow path forming member abuts on the arm portion of the second flow path forming member.

Abstract: A liquid discharge head includes first and second element substrates including: a discharge port array; energy generating elements; and electric contacts electrically connected to the energy generating elements and including first and second electric contacts disposed linearly along one end and the other end. The first and second element substrates are configured such that a distance between the gravity center of the first electric contact and that of a discharge port provided at an end of the discharge port array on the first electric contacts side is different from a distance between the gravity center of the second electric contact and that of a discharge port provided at an end of the discharge port array on the second electric contacts side. The first electric contacts of the first element substrate and the second electric contacts of the second element substrates are disposed linearly, and vice versa.

Abstract: A liquid container detachably mountable to a mounting portion of an ink jet recording apparatus, the liquid container including a casing defining a liquid containing chamber, an electrical contact, a light emitter, a display portion for directing emitted light to an outside of the liquid container, and an information storing portion for storing information relating to the liquid container. First and second engaging portions are engageable with respective first and second locking portions of the mounting portion, and are disposed at opposite first and second sides of the casing. A latch lever displaceably supports the second engaging portion away from the second side. A supply port is provided on a third side of the casing between the first and second sides, the electrical contact is disposed at a corner between the second and third sides, and the display portion is disposed adjacent an upper portion of the second side.

Abstract: An assembly method of a liquid discharge head is provided. The liquid discharge head includes an element substrate, an electrode portion, a flexible wiring member which has the element substrate at one end and the electrode portion at another end, and includes a plurality of bent portions, wherein, each edge line of at least two bent portions are not parallel and a housing. The assembly method includes a step for providing the flexible wiring member and the housing in which the element substrate is fixed on a first surface of the housing, a step for fixing the flexible wiring member on a second surface of the housing while holding the electrode portion at a position on a third surface of the housing where the electrode portion to be fixed, and a step for fixing the electrode portion to the position.

Abstract: The liquid ejecting head includes a printing element board having a plurality of printing elements for producing energy used to eject liquid, a contact board having a contact terminal for electrically connecting to a liquid ejection printing apparatus, and a functional element, a plurality of lands which are provided on the face of the contact board where the functional element is mounted, and to which terminals of the functional element are connected, a wiring member that connects the printing element board to the contact board, a first terminal and a second terminal disposed on one edge of the contact board, a first wiring connecting the contact terminal to the first terminal, a second wiring connecting at least one of the plurality of lands to the second terminal, and insulating resin that covers the edge face of the second terminal positioned on the one edge of the contact board.

Abstract: A liquid ejection head includes a substrate that carries thereon a plurality of ejection energy generating elements arranged in rows to generate energy necessary for ejecting liquid and an ejection port plate that is laid on the substrate and has a plurality of ejection ports formed therein and arranged vis-a-vis the respective ejection energy generating elements. The ejection port plate has a groove, or an oblong recess, formed on the surface thereof where the plurality of ejection ports are formed such that the groove surrounds the region where the ejection ports are formed and has a corrugated inner lateral surface and a flat outer lateral surface arranged oppositely relative to the inner lateral surface.

Abstract: A recording head includes a plurality of nozzle arrays separately provided so as to correspond to kinds of recording liquids to be discharged, a plurality of common liquid chambers from which the recording liquids are supplied to the nozzle arrays, a plurality of recording-liquid introducing passages communicating with the common liquid chambers, and a plurality of filters provided in the recording-liquid introducing passages. Upstream aperture areas of the filters are equal to each other, and downstream aperture areas of the filters are different according to the kinds of recording liquids passing through the filters.

Abstract: A liquid discharge head that is detachably attached to a recording apparatus includes a liquid discharge substrate, a planar region including a plurality of connection terminals that electrically connect the liquid discharge head to the recording apparatus by sliding relative to the recording apparatus while turning when mounted on the recording apparatus, and definition portions defining a rotational center. The planar region is disposed parallel to the rotational center. Among the plurality of connection terminals, the connection terminal disposed closer to the rotational center is longer in a direction perpendicular to the rotational center and parallel to the planar region than the connection terminal disposed more distant from the rotational center.

Abstract: A primary flow path forming member is provided with a groove which becomes a recording liquid supply path on a bottom surface thereof. A second flow path forming member is provided with an arm portion having a small width and a large length. The arm portion of the second flow path forming member is used as a cap for closing the opening of the groove which becomes the liquid supply path formed on the bottom surface of the prime flow path forming member. The primary flow path forming member and the second flow path forming member as described above are formed by injection-molding and bonded with each other by a bonding member. The bonding member is formed to cover the periphery of a portion where the opening edge of the groove which becomes the recording liquid supply path, in the primary flow path forming member abuts on the arm portion of the second flow path forming member.

Abstract: A liquid container detachably mountable to a mounting portion of an apparatus, the mounting portion including a first locking portion and a second locking portion, the liquid container including a casing for containing liquid and a supply port for supplying the liquid to an ink jet head, the liquid container includes a first engaging portion provided at a first side of the casing and engageable with the first locking portion; a second engaging portion provided opposed to a second side of the casing which is opposite the first side, the second engaging portion being engageable with the second locking portion; a supporting member for displaceably supporting the second engaging portion; a contact contactable to a member provided in the mounting portion to permit information display means to display information relating to the liquid container, wherein the supply port is disposed in a third side of the casing which is between the first side and the second side, and the contact is disposed at a corner region betwe

Abstract: A primary flow path forming member is provided with a groove which becomes a recording liquid supply path on a bottom surface thereof. A second flow path forming member is provided with an arm portion. The arm portion of the second flow path forming member is used as a cap for closing the opening of the groove which becomes the liquid supply path formed on the bottom surface of the prime flow path forming member. The primary flow path forming member and the second flow path forming member as described above are formed by injection-molding and bonded with each other by a bonding member. The bonding member is formed to cover a portion where the opening edge of the groove which becomes the recording liquid supply path, in the primary flow path forming member abuts on the arm portion of the second flow path forming member.

Abstract: An inkjet printing apparatus is provided which can print images with no print quality variations. For this purpose, the fluid viscosity resistances between the print head and the print medium beneath respective nozzle arrays that occur as the print head moves in the forward direction are made equal to those that occur as the print head moves in the backward direction.

Abstract: A liquid container detachably mountable to first and second locking portions of a mounting portion of an apparatus. The liquid container includes a casing for containing liquid and a supply port for supplying the liquid to an ink jet head. At respective first and second sides of the casing, first and second engaging portions are provided, respectively engageable with the first and second locking portions. A supporting member displaceably supports the second engaging portion, and a contact is contactable to a member provided in the mounting portion to permit of display information relating to the liquid container. The supply port is disposed in a third side of the casing which is between the first and second sides, and the contact is disposed at a corner region between the second and third sides.

Abstract: The present invention provides a liquid ejection head for which the peeling of an orifice plate from a substrate seldom occurs, even in a structure such that the walls that define each energy application chamber are narrowed toward an ejection port. The walls that define a first pressure chamber are inclined inward within the first pressure chamber, so that the first pressure chamber is narrowed, toward an ejection port, along a direction perpendicular to the heater formation face on which heaters are arranged. Further, the walls that define each ink flow path are inclined in the ink ejection direction. Furthermore, the angle at which the walls that define the ink flow path are inclined relative to the ink ejection direction is smaller than the angle at which the walls that define the first pressure chamber are inclined inward, within the first pressure chamber.