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: An ink jet recording head includes a element substrate; a plurality of ejection outlets, provided on the element substrate, for ejecting ink in a direction perpendicular to the element substrate; and a nozzle formation member having a plurality of ink flow paths which are in fluid communication with the ejection outlets, respectively; wherein the ink flow paths are arranged at a density higher than 1200 dpi in an arranging direction of the ejection outlets; wherein widths of flow passage walls forming the ink flow paths are smaller than heights of the ink flow paths and are smaller than widths of the ink flow paths.

Abstract: An ink jet recording apparatus configured to perform recording by discharging ink from a plurality of discharge ports disposed on a recording head. The apparatus includes a cap adapted to cover the plurality of discharge ports disposed on the recording head, a recessed portion defined on a bottom face inside the cap, a suction hole facilitating introducing a negative pressure to the recessed portion, an atmosphere communication hole located outside a range of the recessed portion and communicating with atmosphere, an ink absorber mounted inside the cap to cover the recessed portion, and a suction pump connected to the suction hole and configured to generate a negative pressure. When the plurality of discharge ports is covered with the cap, a projection image obtained when the plurality of discharge ports is projected onto the bottom face exists within the range of the recessed portion.

Abstract: A liquid discharge head includes recording liquid flow paths communicated with plural discharge ports, a flow path formation member, upstream of the recording liquid flow paths, on which a recording liquid supply passage is provided, a recording liquid storing member, upstream of the recording liquid supply passage, in which a common liquid chamber is provided, a plug member for supplying recording liquid from the outside into the common liquid chamber, and a porous member at the end portion of the flow path formation member to remove dust particles and the like in recording liquid supplied from the common liquid chamber to the recording liquid supply passage. The porous member is arranged above a bottom face of the common liquid chamber.

Abstract: In a flexible wiring board for use in, for example, a liquid discharge head, wires disposed on a substrate in parallel are covered with a film material. The flexible wiring board is bendable towards one of a front surface side and a back surface side of the substrate and includes a bending line. The bending line is formed by bending the flexible wiring board along a bending direction crossing a longitudinal direction of the wires. The bending line contains the wires. Both ends of the flexible wiring board in the bending direction are located on the bending line. A distance between one of the wires located closest to one end of the flexible wiring board and the one end is larger on the bending line than in another part of the flexible wiring board. Accordingly, even if the flexible wiring board is bent at a small bend radius, peeling does not easily occur between a base film and a cover film.

Abstract: A liquid discharge recording head comprising a recording head main body provided with a plurality of liquid flow paths communicated with a plurality of discharge ports for discharging liquid, respectively, and energy generating means for generating energy utilized for discharging the liquid filled in the liquid flow paths from the discharge ports, and an orifice plate provided with a discharge port array having the plurality of discharge ports aligned in one straight line, and bonded to the front face of the recording head main body having openings of the plurality of discharge ports formed therefor, wherein the orifice plate is provided with the extended portion in the alignment direction of the discharge port array or in the direction orthogonal to the alignment direction, being extended more than the width of the front face of the recording head main body, and the extended portion is fixed to the adjacent face of the front face of the recording head main body.

Abstract: A liquid discharge recording head is formed by bonding a recording unit, having plural recording elements for discharging recording liquid, with a recording liquid supply supporting member used for supplying recording liquid to the recording unit. The recording liquid supply supporting member is provided with at least one first snap fitting extending substantially in the same direction as the bonding direction of the recording liquid supply supporting member and the recording unit, and at least one second snap fitting extending in a direction intersecting the extended direction of the first snap fitting. The recording unit is provided with at least one first receiving portion engaging with the first engaging portion formed for the first snap fitting, and at least one second receiving portion engaging with the second engaging portion formed for the second snap fitting.

Abstract: A liquid ejecting head unit includes a chip head and a unit frame connected to the chip head. The chip head includes ejection outlets, flow paths, a first common liquid chamber for supplying liquid to the flow paths, a supply member having a liquid supply path for supplying the liquid to the first common liquid chamber, and energy generating elements. The unit frame has a second common liquid chamber for accommodating the liquid to be supplied to the supply member. A porous member is provided between the liquid supply path of the chip head and the second common liquid chamber of the unit frame. A connecting portion between the chip head and the unit frame is disposed upstream of the porous member, and the porous member is inclined relative to the liquid flow direction.

Abstract: A liquid jet recording head includes a recording portion having a recording element substrate provided with a recording element for discharging liquid and a face surface provided with a discharge port for discharging liquid, a recording liquid storing portion for storing the recording liquid supplied to the recording portion, and a coupling member for coupling the recording portion and the recording liquid storing portion. A projecting member is provided on the recording liquid storing portion. The coupling member couples the recording portion and the recording liquid storing portion so that a leading end of the projecting member projects toward an end of the face surface from a side of the recording portion when the recording portion is coupled with the recording liquid storing portion.

Abstract: In the liquid discharge recording head provided with a stopper member formed of an elastic member to be penetrated by a hollow needle member for liquid supply into a liquid preserving chamber in the recording head, the invention enables smooth insertion of the front end of the needle member into the stopper member without insertion failure. The liquid discharge recording head is provided with a head chip having a nozzle for discharging liquid, and a frame member connected thereto and having a liquid chamber for containing the liquid to be supplied thereto. A hole portion is formed in a portion of the frame member, and joint rubber is pressed into such hole portion. In the joint rubber, there is formed in advance a fissure hole, to be penetrated by a hollow needle provided in the main body of the liquid discharge recording apparatus and having fissures in not less than three directions from the crossing center of the fissures, in a plane perpendicular to the direction of depth of the hole portion.

Abstract: A liquid jet print head can be installed in an ink jet printer and includes a printing unit, a printing device substrate and a supporting substrate. Projections of the supporting substrate are used as a reference for positioning when the printing device substrate is attached to the supporting substrate and when the print head is installed in a carriage of the printer. Further, all reference portions used for positioning in the three-dimensional directions when installing the print head in the carriage are gathered in the printing unit.

Abstract: A head chip and a recording liquid storing unit are bonded through a sealing member. The head chip comprises a recording element base plate, and a flow path formation member provided with a bonding face and a supply hole. The frame member of the recording liquid storing unit is formed by a single member, which is provided with a recording liquid storing chamber, one side face of which forms a totally open portion. The shape of the opening portion is equal to the sectional shape of the recording liquid storing chamber. For the flat portion of the sealing member, there are formed a hole portion, the circumferential first face-side ribs that surround it, and the second face-side ribs, which are exactly symmetrical to the first face-side ribs, with the flat portion between them. These ribs are compressed and held by both bonding faces. An inner extrusion of the rib on the flat portion is fitted into the position hole of the bonding face.

Abstract: A liquid supply device for supplying liquid to a recording head is disclosed. The device includes a liquid container for holding liquid to be supplied to the recording head, a first connecting portion for connecting the recording head and the liquid container, and a second connecting portion having one end thereof in the liquid container, and the other end being open to the air outside and positioned lower in height than the liquid discharge port of the recording head. The device is capable of adjusting negative pressure against the nozzle of the recording head to prevent ink leakage without depending on the deformation of an ink bag.

Abstract: A liquid jet recording head packing method can effectively suppress the problem of leakage of liquid from a liquid jet recording head due to expansion of the liquid and/or the gas in the liquid chamber when the liquid jet recording head that is provided with a chamber for containing liquid is packed and subsequently subjected to abrupt changes in the environment. The liquid jet recording head comprises a head chip provided with nozzles for ejecting liquid and a frame having a second common liquid chamber for storing liquid to be supplied to the head chip. A joint rubber member is forcibly driven into each of a number of holes arranged in part of the frame and a pipe member is driven into the fissure hole of each of the joint rubber members in order to keep the inside of the second common liquid chamber in a state where it communicates to a peripheral area of the liquid jet recording head by way of the joint rubber members.

Abstract: A liquid discharge recording head comprising a recording head main body provided with a plurality of liquid flow paths communicated with a plurality of discharge ports for discharging liquid, respectively, and energy generating means for generating energy utilized for discharging the liquid filled in the liquid flow paths from the discharge ports, and an orifice plate provided with a discharge port array having the plurality of discharge ports aligned in one straight line, and bonded to the front face of the recording head main body having openings of the plurality of discharge ports formed therefor, wherein the orifice plate is provided with the extended portion in the alignment direction of the discharge port array or in the direction orthogonal to the alignment direction, being extended more than the width of the front face of the recording head main body, and the extended portion is fixed to the adjacent face of the front face of the recording head main body.

Abstract: A liquid jet print head can be installed in an ink jet printer and includes a printing unit, a printing device substrate and a supporting substrate. Projections of the supporting substrate are used as a reference for positioning when the printing device substrate is attached to the supporting substrate and when the print head is installed in a carriage of the printer. Further, all reference portions used for positioning in the three-dimensional directions when installing the print head in the carriage are gathered in the printing unit.

Abstract: A recording element substrate has a plurality of recording elements are provided, a wiring sheet is provided at a position to surround a periphery of the recording element substrate to transmit a recording signal to the recording element substrate, a wiring substrate is electrically connected to one end portion of the wiring sheet to input a recording signal from an exterior, and a flow path forming member supplies recording liquid to the recording element substrate. When the flow path forming member is joined to a frame body having a common liquid chamber, in a state in which the an end of the wiring substrate is supported by the flow path forming member, a liquid jet recording head is held due to opposing both end portions of another end portion of the wiring substrate being respectively inserted and engaged with a set of engaging grooves provided at the frame body.

Abstract: A liquid discharge recording head comprising a recording head main body provided with a plurality of liquid flow paths communicated with a plurality of discharge ports for discharging liquid, respectively, and energy generating means for generating energy utilized for discharging the liquid filled in the liquid flow paths from the discharge ports, and an orifice plate provided with a discharge port array having the plurality of discharge ports aligned in one straight line, and bonded to the front face of the recording head main body having openings of the plurality of discharge ports formed therefor, wherein the orifice plate is provided with the extended portion in the alignment direction of the discharge port array or in the direction orthogonal to the alignment direction, being extended more than the width of the front face of the recording head main body, and the extended portion is fixed to the adjacent face of the front face of the recording head main body.