Abstract: A wiring member for a liquid ejection head enables reducing the size of the liquid ejection head. A flexible printed circuit 39 has on one end a plurality of individual electrode wiring terminals 53 corresponding to individual element electrode terminals of piezoelectric elements; individual electrode wires 55 corresponding to the individual electrode wiring terminals 53; a common electrode wiring terminal 57 corresponding to a common electrode terminal of the piezoelectric elements; and a common electrode wire 59 corresponding to the common electrode wiring terminal. The individual electrode wiring terminals, common electrode wiring terminal, and individual electrode wires are disposed on one side of the flexible printed circuit, and the common electrode wire is disposed on the other side of the flexible printed circuit.

Abstract: An inkjet printhead includes: a substrate; a row of nozzle chambers disposed on the substrate; an ink conduit extending longitudinally adjacent the row of nozzle chambers; and a nozzle plate spanning over the ink conduit and the row of nozzle chambers. Each nozzle chamber has a respective ink ejection opening defined in the nozzle plate; a first ink inlet defined in a sidewall of the nozzle chamber for receiving ink from the ink conduit; and a second ink inlet defined in a floor of the nozzle chamber. Each of the first and second ink inlets is in fluid communication with a common ink reservoir.

Abstract: An ink introducing port is provided on the upstream side of the center of a row of pressure chambers in the direction of gravity g, the pressure due to ink introduction is applied to a region where the influence by the head is small.

Abstract: The present disclosure relates to a fast drying solvent-based inkjet ink composition for thermal inkjet printing, the ink composition comprising at least 40 weight percent base solvent, a solvent-compatible colorant, not more than 25 weight percent propellant, a decap controlling additive, and not more than 5 weight percent water. The present disclosure also relates to the method and system for inkjet printing with the above-described ink.

Abstract: A printhead nozzle arrangement is provided having a wafer defining a chamber for holding ejection fluid, an ejection port supported by a plurality of bridge members which extend from the ejection port to sides of the chamber, and a plurality of heater elements interleaved between the bridge members for causing ejection of fluid held in the chamber through the ejection port.

Abstract: An inkjet printer including: a printhead having a plurality of nozzles assemblies, each nozzle assembly having: a nozzle chamber for containing ink, the chamber having a nozzle opening and an ink inlet; and a bend actuator for ejecting ink droplets from the nozzle opening by generating a positive pressure pulse in the ink during bending of the actuator. An ink supply system supplies ink to the printhead so that a hydrostatic pressure of ink can be varied. Increasing the hydrostatic ink pressure increases a volume of the ejected ink droplets, and decreasing the hydrostatic ink pressure decreases a volume of the ejected ink droplets.

Abstract: A nozzle arrangement for an inkjet printhead includes a wafer substrate defining an inlet channel; a nozzle chamber wall and a roof wall positioned on the wafer substrate to define a nozzle chamber in fluid communication with the inlet channel, the roof wall defining an ink ejection port in fluid communication with the nozzle chamber; a paddle positioned in the nozzle chamber and reciprocally displaceable to eject ink from the ejection port; and an actuating arm extending through the nozzle chamber wall and connected to the paddle, the actuating arm comprising an actuating portion having a pair of actuating members, one of the actuating members including a heating circuit. On receipt of an electrical signal to the exclusion of the other actuating member, the actuating arm is displaced in a first direction. The actuating arm is comprised of a resiliently flexible material, whereby on cessation of the electrical signal, the actuating arm is displaced in a second direction opposite to the first direction.

Abstract: Provided is a nozzle arrangement for an ink jet printer. The arrangement includes a wafer substrate with a layer of drive circuitry, said substrate defining an ink supply channel through the substrate leading to an ink chamber with a roof defining an ink ejection port. The arrangement also includes an ink ejection arrangement for ejecting ink from the ink chamber via the port, said ink ejection arrangement having four symmetrically arranged thermal bend actuators each connected to a respective side to ensure that the roof is operatively displaced in a rectilinear manner during ink ejection.

Abstract: A droplet discharge head including a nozzle substrate having nozzle openings, a cavity substrate having discharge chambers that communicate with the nozzle openings and discharge droplets from the nozzle openings, a reservoir substrate having a reservoir concave portion that serves as a reservoir which communicates commonly with the discharge chambers. The reservoir substrate is provided between the nozzle substrate and the cavity substrate and a resin thin film is formed on a whole inner face of the reservoir concave portion and on a bottom face of a second concave portion. The second concave portion is provided in a peripheral of the reservoir concave portion and has a depth which is smaller than the depth of the reservoir concave portion. The resin thin film is cut circularly so as to surround the reservoir concave portion, and a part of the resin thin film serves as a diaphragm buffering pressure variation. serves as a diaphragm buffering pressure variation.

Abstract: The present invention provides an ink composition comprising a compound having a fragment containing a cyclic ether group having at least one bicyclo or tricyclic substituent.

Abstract: There is provided a liquid ejecting head including pressure generation chambers that communicate with nozzle openings from which liquid droplets are discharged, liquid flow paths that communicate with the pressure generation chambers, and pressure generation units that generate pressure for discharging liquid droplets in the pressure generation chambers. In the liquid ejecting head, foam members formed with closed cells are provided in the liquid flow paths.

Abstract: A liquid ejecting head is provided. The liquid injecting head includes two reservoirs. The reservoirs include expansion chambers arranged in parallel in a direction in which pressure chambers are arranged. Each reservoir includes multiple expansion chambers formed so that an inner wall surface of one of the reservoirs protrudes toward the other reservoir. Each expansion chamber having a liquid introduction opening. Constriction portions are formed so that the inner wall surface of one reservoir protrudes at locations that oppose the expansion chambers of the other reservoir. The constriction portions narrow the flow channel width in the direction intersecting with the direction in which the pressure chambers are arranged. The liquid introduction openings provided in the expansion chambers disposed on either side of the constriction portion are formed in locations that are at different distances from the constriction portion and have different cross-sectional areas.

Abstract: A printhead is provided having nozzles and heaters having heater elements and electrodes connecting current from a power source to the heater elements to heat, and form gas bubbles in, liquid within the nozzles which causes ejection of the liquid from the nozzles. The heaters are formed of layers of a single material. A first layer of the single material has portions of different thickness respectively defining the heater elements and electrodes. A second layer of the single material overlaying and spaced from the first layer has a single thickness defining the electrodes.

Abstract: A fluid ejecting integrated circuit (IC) includes a nozzle chamber defined by chamber side walls extending from a wafer substrate, and a roof wall provided on the chamber side walls; a fluid ejecting member provided within the nozzle chamber between the roof wall of the nozzle chamber and the wafer substrate; a support formation provided within the nozzle chamber and spaced inwardly away from the chamber side walls, the support formation extending from the wafer substrate to support the fluid ejecting member thereon; a first planar electrode layered to the fluid ejecting member; a second planar electrode layered on the wafer substrate; and a projection provided on the first planar electrode on a side facing the second planar electrode, the projection for contacting the second planar electrode to prevent contact between the first planar electrode and the second planar electrode.

Abstract: Disclosed herein is a fast drying solvent-based inkjet ink composition for thermal inkjet printing. The ink composition includes at least 40 weight percent base solvent, a solvent-compatible colorant, not more than 25 weight percent propellant, a decap-controlling additive, from 0.5 weight % to 3.5 weight % of a binder resin and not more than 5 weight % water. The application also relates to the method and system for inkjet printing with the above-described ink.

Abstract: A nozzle assembly for an inkjet printhead includes a substrate defining a nozzle chamber and an ink inlet channel in fluid communication with said chamber; a nozzle defined on the substrate and located over the nozzle chamber, said nozzle having a crown portion with a skirt portion depending from the crown portion, the skirt portion forming a first part of a peripheral wall portion of the nozzle chamber, the nozzle surrounded by a raised rim for supporting a meniscus of a body of ink in the nozzle chamber; and an actuator with a connecting arm fast with the nozzle to operatively displace the nozzle towards the substrate. The nozzle is substantially hexagonally shaped.

Abstract: A printhead system for an inkjet printer includes a pagewidth inkjet printhead formed from a plurality of printhead integrated circuits arranged end-to-end; a flexible ink hose extending a length of the printhead, the flexible ink hose defining a plurality of distinct and parallel ink channels and further defining plural groups of apertures repeated along the length of the flexible ink hose; and a substrate channel supporting on a top thereof the plurality of printhead integrated circuits and supporting from a bottom thereof the extruded flexible ink hose, the substrate channel provided with plural groups of repeated apertures defined therethrough and extending along a length of the channel. Each group of apertures provided on the substrate channel aligns with a respective group of apertures defined along the flexible ink hose and further with apertures provided on a bottom of one printhead integrated circuit.

Abstract: A unit cell of a printhead is provided having a multi-layer substrate defining an ink inlet, one or more side walls extending from the substrate around the ink inlet, a nozzle plate supported by the side walls to define a chamber in fluid communication with the ink inlet, where the nozzle plate defines an aperture through which ink in the chamber can be ejected, and a looped and elongate heater element suspended within the chamber, which can be heated so that bubbles are generated in ink within the chamber and ink is ejected from the aperture. The nozzle plate defines a protruding rim bounding the aperture.

Abstract: A thermal bend actuator, having a plurality of elements, is provided. The actuator comprises a first active element for connection to drive circuitry a second passive element mechanically cooperating with the first element. When a current is passed through the first element, the first element expands relative to the second element, resulting in bending of the actuator. The first element is comprised of an aluminium alloy.

Abstract: A nozzle cell of a printhead is provided which has a multi-layer substrate defining a fluid inlet, side walls extending from the substrate around the fluid inlet and comprising walls of silicon nitride encapsulating hardened photoresist, an apertured roof supported by the side walls to define a chamber, and a heater within the chamber, the heater heating the fluid in the chamber so that bubbles are generated therein to cause ejection of the fluid from a nozzle defined with the apertured roof.

Abstract: An inkjet printhead integrated circuit includes a substrate; a drive circuitry layer positioned on the substrate, the substrate and the drive circuitry layer defining a plurality of ink inlet channels; nozzle chamber walls positioned on the substrate, the nozzle chamber walls supporting roof structures to define nozzle chambers in fluid communication with the ink inlet channels; ink ejection ports defined in the roof structures; ink ejection members positioned in respective nozzle chambers and displaceable with respect to the roof structures to eject ink from the ink ejection ports; fulcrum formations fast with the substrate, each fulcrum formation having an effort formation on one side and a load formation on an opposite side; and thermal actuators outside of and associated with respective nozzle chambers and connected to the drive circuitry layer to move with respect to the substrate on receipt of electrical signals from the drive circuitry layer.

Abstract: An ink-jet ink-receptive composition, which resolves problems such as blurring of images and show-through occurring when water soluble dye inks are employed on uncoated paper such as plain paper or ordinary postcards and which provide a high density and high quality image, contains a specific silica particle aggregate and polyvinylpyrrolidone.

Abstract: A method for manufacturing an electromechanical transducer film including a lower electrode and plural layers of a sol-gel solution film formed on the lower electrode by an inkjet method, the method including the steps of a) modifying a surface of the lower electrode, b) forming a first sol-gel solution film on the surface of the lower electrode by ejecting droplets of a sol-gel solution to the surface of the lower electrode, and c) forming a second sol-gel solution film on the first sol-gel solution film by ejecting droplets of the sol-gel solution to a surface of the first sol-gel solution film. Adjacent dots formed on the surface of the lower electrode by the droplets ejected in step b) overlap each other. Adjacent dots formed on the surface of the first sol-gel solution film by the droplets ejected in step c) do not overlap each other.

Abstract: A nozzle arrangement for an inkjet printhead includes an ink inlet; a static ink ejecting member bounding the ink inlet; an active ink ejecting member having a roof defining an ink ejection port and sidewalls depending from the roof towards the substrate, the active ink ejecting member and the static ink ejecting member together defining a nozzle chamber; and an actuator arrangement configured to reciprocate the active ink ejection member relative to the static ink ejecting member to eject ink in the nozzle chamber out through the ink ejection port. The static ink ejecting member is located within bounds delimited by the sidewalls of the active ink ejecting member, the static ink ejecting member includes a sealing structure defined along an edge of the static ink ejecting member and spaced from the sidewall, and the sealing structure is shaped to facilitate a surface tension of a fluid in the variable-volume nozzle chamber to form a fluidic seal between the active and static ink ejecting members.

Abstract: A nozzle arrangement for an inkjet printhead includes a substrate assembly defining an ink inlet channel; a nozzle chamber in fluid communication with the ink inlet channel, the nozzle chamber including an ink ejection port defined through a roof of the nozzle chamber, and a pivotal wall formed as part of one sidewall of the nozzle chamber; a paddle attached to the pivotal wall in a cantilevered manner, and extending into the nozzle chamber; a pair of anchors extending from the substrate assembly, a first anchor of the pair connected to a positive electrical contact and a second anchor of the pair connected to a negative electrical contact; and a thermal expansion actuator forming a bridge between the pair of anchors and the pivotal wall, the thermal expansion actuator having two arms each respectively attached to each of the pair of anchors, the thermal expansion actuator further having a bridge portion bridging the two arm.

Abstract: An inkjet printhead is disclosed. The printhead has an array of ink chambers. Each ink chamber has a nozzle and a thermal actuator for generating vapor bubbles to eject ink through the nozzle. The thermal actuator has a pair of contacts and at least two parallel current paths between the contacts. Each of the current paths has a plurality of heater elements for nucleating a vapor bubble.

Abstract: The present application is directed to electrostatic actuators, and methods of making electrostatic actuators. In one embodiment, an electrostatic actuator of the present application comprises a first electrode and a second electrode. The second electrode is positioned in proximity to the first electrode so as to provide a gap between the first electrode and the second electrode. The first electrode is capable of being deflected toward the second electrode. A dielectric structure comprising a dielectric landing post is positioned in the gap between the first electrode and the second electrode, the dielectric structure extending over a greater surface of the gap than the landing post. The landing post protrudes out into the gap so as to limit the minimum contact spacing between the first electrode and the second electrode.

Abstract: An ejection arrangement is provided for a printhead nozzle. The arrangement has a chamber having an inlet defined by edge portions of a first side of the chamber and an ejection port defined in a second side of the chamber, and an ejection member located in the chamber between the edge portions. The ejection member is operable to cause ejection of fluid in the chamber through the ejection port and subsequent refill of fluid into the chamber through the inlet. The edge portions are configured to reduce fluid flow through a space between the edge portions and the ejection member during ejection.

Abstract: A pagewidth printhead includes a printhead controller; a wafer substrate defining a plurality of inlets; and a plurality of micro-electromechanical nozzle arrangements on the wafer substrate and under control of the controller. Each nozzle arrangement includes side walls disposed on the wafer substrate with a roof portion attached to said side walls to define a printing fluid chamber in fluid communication with one inlet, the roof portion defining an ejection port; and at least two heater elements suspended between the side walls in the fluid chamber for forming a vapour bubble in response to electrical actuation energy being applied thereto, whereby a pressure increase in the chamber is effected and fluid in the fluid chamber ejected therefrom via the ejection port. The controller is configured to actuate the at least two heater elements individually to facilitate ejection of weighted ink drop volumes from the nozzle arrangement.

Abstract: A printhead assembly includes an elongate channel member of a metal alloy; a flexible elongate fluid carrier positioned on a floor of the channel member, the fluid carrier defining a plurality of passages longitudinally extending along a length of the fluid carrier, the fluid carrier further defining a repeated pattern of holes on an external surface thereof, the holes providing fluid communication from outside the fluid carrier to respective passages of the fluid carrier; and a series of printhead modules mounted to the external surface of the fluid carrier, each printhead module including an upper micro-molding and a lower micro-molding, the lower micro-molding having an air inlet slot in fluid communication with one of the plurality of passages via a hole of the repeated pattern of holes at one end and a series of alternating air inlets and outlets on the upper micro-molding at an opposite end.

Abstract: An inkjet printhead includes a substrate having an array of nozzles grouped in nozzle pairs. Each nozzle pair has a common nozzle chamber and a single actuator configured to selectively eject ink from one or other of the nozzles in the nozzle pair.

Abstract: A reliable ink jet print head enables small ink droplets to be ejected at a high frequency while preventing possible satellites and mist. A bubbling chamber, in which an energy generating element is disposed, communicates, via an ejection port portion, with an ejection port provided opposite the energy generating element. The ejection port portion is formed such that flow resistance to ink is lower in an area of the ejection port portion which is positioned inward from a center of the ejection port in an ink supply direction of ink flowing along the ink supply channel, than in an area of the ejection port portion which is positioned outward from the center of the ejection port.

Abstract: An electrostatic liquid-ejection actuation mechanism includes a membrane, a frame, and one or more deformable beams. The frame has two sides and a number of cross members that are non-parallel to the two sides. The two sides and the cross members define one or more areas individually corresponding to one or more liquid chambers. The deformable beams are disposed between the membrane and the frame. The deformable beams individually correspond to the liquid chambers, and define a number of slits. Each slit is adjacent to one of the two sides of the frame. The deformable beams have a width that is less than a width of the liquid chambers, due at least to the slits.

Abstract: An electrostatic actuator includes a fixed electrode formed on a substrate, a movable electrode provided so as to oppose the fixed electrode with a predetermined gap therebetween, a driving unit generating electrostatic force between the fixed electrode and the movable electrode and moving the movable electrode, insulating films provided on opposing faces of the fixed electrode and the movable electrode, at least one of the insulating films having a layered structure of silicon oxide and a dielectric material whose relative permittivity is higher than the relative permittivity of the silicon oxide, and a surface protection film provided one or both of the insulating films and made of a ceramics-based hard film or a carbon-based hard film.

Abstract: A micro-electromechanical nozzle arrangement for a printhead integrated circuit featuring a nozzle chamber capped by an ink ejection port includes a paddle located in the nozzle chamber below the ink ejection port; an actuator arm having a fixed end fixed to the substrate and a working end displaceable towards and away from the substrate; and a motion transmitting structure interconnecting the working end of the actuator arm and a proximal end of the paddle. The actuator arm and the paddle are formed of the same material.

Abstract: A liquid jet head includes: a plurality of unit heads, wherein each of the unit heads has a nozzle forming region and a plurality of nozzle apertures arranged in a first direction in the nozzle forming region, the plurality of unit heads being laminated in a manner that the nozzle forming regions are shifted from one another in a second direction orthogonal to the first direction, wherein the unit heads are laminated in a third direction orthogonal to the first direction and the second direction, and liquid is ejected in a fourth direction between the second direction and the third direction.

Abstract: A printhead integrated circuit assembly includes a substrate having a plurality of micro-electromechanical nozzle arrangements formed thereon, each micro-electromechanical nozzle arrangement including a nozzle chamber defined by a crown portion, a skirt portion, and a wall portion; a lever arm included with the micro-electromechanical nozzle arrangement, the lever arm connected at one end to the crown and skirt portions, and at another end to an actuator, the lever arm adapted to move the crown and skirt portions with respect to the wall portion; drive circuitry for supplying a current to the actuator, the current for heating a portion of the actuator to bend the actuator through thermal expansion; containment walls extending from the substrate to surround each micro-electromechanical nozzle arrangement; and a nozzle guard mounted on the containment walls to individually enclose therein, together with the containment walls, each micro-electromechanical nozzle arrangement, the nozzle guard defining therethroug

Abstract: There is provided a liquid transporting apparatus which includes a substrate having an insulating surface, a plurality of liquid transporting channels, a common liquid chamber which supplies a liquid to the liquid transporting channels, a plurality of individual electrodes arranged on the plurality of liquid transporting channels respectively, an insulating layer which covers the individual electrodes, a plurality of wire portions which are connected to the individual electrodes respectively, and a driver IC which applies a driving electric potential to the individual electrodes. Accordingly, it is possible to make simple a structure of the liquid transporting apparatus, and to reduce a manufacturing cost.

Abstract: A nozzle structure for an inkjet printer printhead includes an ink ejection port; a nozzle chamber in fluid communication with the ink ejection port and an ink supply channel of the inkjet printer printhead; and a cantilevered thermal actuator terminating in a free end over the ink supply channel. The thermal actuator includes a serpentine heater layer connected to a CMOS drive circuitry layer of the printhead. The thermal actuator is adapted to reciprocate towards and away from the ink ejection port in response to signals from the drive circuitry layer.

Abstract: An intermediate liquid chamber is formed between an ink conducting path to which ink is supplied from an ink supply source such as an ink cartridge and a common liquid chamber to which ink to be provided to a plurality of pressure chambers is supplied. The intermediate liquid chamber communicates with both the ink conducting path and the common liquid chamber. The intermediate liquid chamber includes a conducting opening which communicates with the ink conducting path and a discharge opening which is opened to the common liquid chamber. The discharge opening is formed from one edge portion to the other edge portion of the common liquid chamber along a pressure chamber arrangement direction.

Abstract: A printhead for an inkjet printer includes a wafer defining a plurality of nozzle chambers and a plurality of ink supply channel in fluid communication with the plurality of nozzle chambers for supplying the plurality of nozzle chambers with ink; an ink ejection port associated with each nozzle chamber; and a plurality of actuators associated with each nozzle chamber, the plurality of actuators each including a petal formation. A plurality of petal formations are arranged around an ink ejection port of each nozzle chamber to annularly surround the ink ejection port. Each actuator is operable to displace a respective petal formation into the nozzle chamber.

Abstract: A nozzle arrangement for an inkjet printer includes a wafer substrate defining a supply channel; side and roof walls positioned on the substrate, said walls defining a nozzle chamber operatively supplied with ink via the supply channel, and a nozzle rim defined in the roof wall; an actuator device passing through a slot in a side wall of the chamber, the device configured to operatively eject ink from the nozzle rim; and an actuator slot protection barrier mounted on the actuator device, and extending at a normal to the actuator device, the actuator slot protection barrier located proximate the slot and configured to reduce ink wicking on the nozzle rim during ejection of ink from the nozzle rim.

Abstract: A printhead has a plurality of nozzle arrangements. Each arrangement includes a substrate defining an ink inlet aperture with a wall portion bounding the ink inlet aperture and a crown portion defining a nozzle opening; a skirt portion depending from the crown portion to form part of a peripheral wall of the nozzle assembly, the crown and skirt portions being displaceable with respect to the wall portion towards the substrate to alter a volume of a nozzle chamber defined by the wall, crown and skirt portions; and a thermal actuator interconnecting the crown and skirt portions with the substrate, the actuator for displacing the crown and skirt portions. The wall portion and skirt portions are configured to define a fluidic seal to inhibit the egress of ink during such displacement. The substrate further includes a layer of micro-electromechanical drive circuitry for actuating the actuator.

Abstract: A printhead has a plurality of nozzle arrangements. Each nozzle arrangement includes a wafer substrate defining a nozzle chamber, said chamber having a roof wall with an ink ejection port defined therein and an ink supply channel defined through the substrate for supplying the chamber with ink; a magnetic coil arrangement positioned around the inlet of the nozzle chamber; bridge members spanning over the magnetic coil arrangement, the bridge members being supported on support posts protruding from the magnetic coil arrangement and having a resilient characteristic; and a magnetic paddle supported from the bridge members over the inlet, the magnetic paddle for ejecting ink from the chamber via the ejection port.

Abstract: An ink jet printhead that has a nozzle aperture that defines a planar opening having two planes of symmetry, both of which extend perpendicular to the plane of the opening. The printhead also having a heater corresponding to the nozzle aperture for generating a gas bubble in printing fluid to eject a drop of the printing fluid through the nozzle aperture. The heater element is a suspended beam that has two planes of symmetry and at least one of the heater element planes of symmetry is common to one of the nozzle aperture plane of symmetry.

Abstract: An inkjet printhead nozzle arrangement includes side walls provided on a wafer substrate and a roof layer deposited on said side walls to define an ink chamber, the roof layer defining a nozzle aperture; an inlet defined in the substrate to supply the ink chamber with printing fluid; and at least one heater element having two opposite sides parallel to a plane of the ejection aperture, the heater element adapted to generate a gas bubble at both of said opposite sides. The heater elements and associated electrodes are arranged in the chamber to be non-coincident and have an annular shape facilitating a point of collapse of the bubble near a center thereof. The heater element has a mass of less than 10 nanograms.

Abstract: An inkjet printhead has a wafer substrate with a droplet ejection side and a liquid supply side opposite the droplet ejection side. Drive circuitry layers are formed on the droplet ejection side of the wafer substrate. An array of nozzles is formed on the droplet ejection side of the wafer substrate, each nozzle having a drop ejection actuator and an associated drop ejection aperture for ejecting drops of liquid. Ducting extends from the liquid supply side into the wafer substrate and terminating before reaching the droplet ejection side. Liquid inlets establish fluid communication between the ducting and the array of nozzles.

Abstract: A nozzle arrangement for a printhead integrated circuit is provided having a fluid chamber having a fluid ejection port, a fluid ejecting member displaceable within the chamber to eject fluid from the ejection port, an actuator for causing displacement of the ejecting member from outside the chamber, and a resiliently deformable seal on the chamber for fluidically sealing the chamber about the ejecting member.

Abstract: An inkjet printhead comprises a plurality of nozzles; a supply of printing fluid in fluid communication with the plurality of nozzles; and a plurality of heater elements corresponding respectively to each of the nozzles, the heater elements for heating the printing fluid to form a gas bubble for ejecting a drop of printing fluid of a predetermined volume from the nozzle. Each of the heater elements has an area proportional to the predetermined volume. The area being such that an amount of energy generated by each heater element to form the gas bubble is substantially equal to or less than an amount of energy absorbable by a drop of printing fluid having the predetermined volume.

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.