Abstract: A fluid ejection device includes a substrate having a fluid channel including a fluid inlet and a fluid outlet, a flexible membrane supported by the substrate and extended a length of the fluid channel, an actuator provided on the flexible membrane, and a constriction provided within the fluid channel between the fluid inlet and the fluid outlet, such that the actuator is adapted to deflect the flexible membrane relative to the fluid channel, and the constriction supports the flexible membrane between the fluid inlet and the fluid outlet.

Abstract: An inkjet head includes a flow channel member comprising a first orifice which opens in a first direction, in which ink flows into the first orifice. The flow channel member also includes a second orifice which opens in a second direction opposite to the first direction, in which ink flows out from the second orifice, and an ink flow channel formed therein, in which the ink flow channel extends from the first orifice to the second orifice. Moreover the inkjet head includes a flexible film which is attached to the flow channel member, and the flexible film seals the ink flow channel.

Abstract: There is provided an inkjet head including an inkjet head plate slantedly coupled to a cartridge supplying ink; a nozzle ejecting ink moving through a path formed inside the inkjet head plate, and formed at a flattened edge of the inkjet head plate contacting a printing medium; and an actuator provided on a surface of the inkjet head plate opposite to that coupled to the cartridge and controlling the ejection of the ink.

Abstract: An electronic apparatus includes an electronic apparatus main body; and a movable body which is mounted in the electronic apparatus main body, with its predetermined direction-wise one end supported thereon, so as to be displaceable between an encased condition where its one surface faces the main body and an unfolded condition where the one surface is exposed. The electronic apparatus main body and the movable body are so arranged that, in the movable-body encased condition, orthographical projections in the predetermined direction, respectively, of at least a part of the other end portion of the movable body in the predetermined direction and at least a part of that area of the electronic apparatus main body which is opposed to the other end portion of the movable body are kept in superposed relation with each other.

Abstract: The liquid ejection apparatus has: a head which ejects liquid; a carriage which conveys the head; a sub tank which is mounted on the carriage, accommodates the liquid to be supplied to the head, and has an elastic film deforming elastically in accordance with supply of the liquid to the head; a liquid flow channel opening and closing valve which opens and closes a first liquid flow channel between the head and the sub tank; a main tank which stores the liquid to be supplied to the sub tank; a liquid supply coupling section which couples a second liquid flow channel connected to the main tank, to the sub tank, in a state where the carriage is located in a predetermined home position; and an elastic film movement device which moves the elastic film in a direction which causes the elastic film to recover from elastic deformation to assist deformation recovery of the elastic film of the sub tank, in a state where the first liquid flow channel is closed by means of the liquid flow channel opening and closing valve

Abstract: A liquid discharge head includes a substrate which has a heating resistive element for generating a bubble in a liquid, and a first wall member which faces the heating resistive element. A discharge port which discharges the liquid is provided in the first wall member, and an ink channel communicated with the discharge port is formed between the substrate and the first wall member. In the liquid discharge head, the substrate includes a second wall member around the heating resistive element, the second wall member being protruded in a direction toward the discharge port, the first wall member includes a protrusion portion in a surface facing the substrate, the protrusion portion being protruded toward the heating resistive element, and an end portion of the protrusion portion exists in a region in which the second wall member surrounds the heating resistive element.

Abstract: A liquid feed tube for feeding a liquid from a liquid tank disposed on a liquid jetting device body side to a jetting head mounted on a reciprocating carriage, including: a long elastic member and a film member connected in an airtight state to the elastic member along a longitudinal direction of the elastic member; and a space part formed by the elastic member and the film member and used as a liquid feed passage, wherein the elastic member is made of a specific resin composition. Thus, the bending rigidity of the liquid feed tube can be lowered, and the resistance to moisture permeability and the gas barrier property thereof can be realized at low cost.

Abstract: A liquid droplet ejection head includes: a nozzle plate that has a plurality of nozzles ejecting a liquid droplet; a flow path member that includes: pressure generating chambers that communicate with the nozzles; and liquid supply paths through which liquid is supplied to the pressure generating chambers; and a damper portion that is disposed in at least one part of a region, the region being on the nozzle plate, corresponding to the liquid supply paths, the damper portion reducing a fluctuation of an ejection amount of the liquid droplets to enable stable ejection.

Abstract: A printhead structure is provided comprising a moulding, silicon wafer and a plurality of microelectromechanical ink ejection devices. The moulding at least defines a fluid reservoir and a first passage in fluid communication with the fluid reservoir. The silicon wafer at least defines a second passage spaced from the first passage and a third passage arranged to provide fluid communication between the first and second passages. The microelectromechanical ink ejection devices are in fluid communication with the second passage.

Abstract: An inkjet head including a plurality of restrictors to reduce crosstalk. The inkjet head includes a channel plate in which an ink channel is formed, an actuator formed on the channel plate, and an ink-supply bezel including a manifold. The ink channel includes an ink inlet to receive ink from the manifold, reservoirs to store ink received through the ink inlet, chambers filled with ink supplied from the reservoirs, nozzles to eject ink filled in the chambers, first restrictors connecting the reservoirs to the chambers, and second restrictors connecting the reservoirs to the ink inlet. Each of the reservoirs includes a first reservoir and a second reservoir that are separated by a central separation wall, and the separation wall includes a third restrictor connecting the first and second reservoirs. Therefore, crosstalk caused by a back flow of ink and transmission of a pressure wave can be prevented during ejection of ink.

Abstract: A damper includes a reservoir which stores a liquid and damps a pressure fluctuation in the liquid and includes a gas-liquid separation membrane which demarcates an upper portion of the reservoir, and a flexible damper film which demarcates the reservoir at a lower side of the gas-liquid separation membrane. Accordingly, there is provided a damper which is capable of improving an air-discharge efficiency while suppressing an increase in the size, and moreover improving a pressure relaxation efficiency.

Abstract: An ink-jet head is disclosed. The ink-jet head can include: a chamber for holding ink, an actuator coupled to one side of the chamber to provide pressure to the chamber, a damper portion connected with the other side of the chamber, an accelerator portion extending from a lateral surface of the damper portion, and a nozzle formed at an end of the accelerator portion. Certain embodiments of the invention can be used to increase the speed at which ink is ejected and improve the straightness of the ejection path.

Abstract: A printhead and ink supply arrangement suitable for utilization in a print on demand camera system includes a housing. A baffle unit is encased in the housing and, together with the housing, defines a number of ink storage chambers. The baffle unit is configured to inhibit ink acceleration as a result of movement of the camera system. An ink distribution manifold is arranged on the baffle unit and defines a series of slots. The series are in fluid communication with respective storage chambers and ink outlets. A printhead is arranged on the ink distribution manifold to receive ink via the ink outlets.

Abstract: A liquid discharge apparatus includes a nozzle, a pressure chamber, a liquid supply chamber, a liquid supply passage, and a fluid resistance changing mechanism. A liquid pressure in the pressure chamber is configured to be changed to discharge liquid from the nozzle. The liquid supply passage extends in a connecting direction to connect the liquid supply chamber and the pressure chamber. The fluid resistance changing mechanism is configured to change a fluid resistance of the liquid supply passage.

Abstract: An inkjet printer that has an elongate array of nozzles for ejecting ink, a plurality of ejection actuators, each configured to eject ink through one of the nozzles respectively, a plurality of ink conduits aligned with a longitudinal extent of the elongate array of nozzles, the ink conduits extending adjacent the elongate array for supplying the array of nozzles with ink and, a plurality of pulse dampers positioned along each of the ink conduits, each pulse damper being individually in fluid communication with one of the ink conduits and each containing a volume of gas for compression by pressure pulses in the ink conduits. A pressure pulse moving through an elongate printheads, such as a pagewidth printhead, can be damped at any point in the ink flow line. However, the pulse will cause nozzle flooding as it passes the nozzles in the printhead integrated circuit, regardless of whether it is subsequently dissipated at the damper.

Abstract: A damper device includes a storage chamber storing a liquid, and formed: of a substrate; a pair of supporting portions which are arranged to face each other in a predetermined facing direction, which project from the substrate, and peripheral portions of which have shapes substantially same with each other; and a film which is flexible and which has a sheet shape. The film is connected to the peripheral portions of the pair of supporting portions, and the storage chamber is formed as a space having a curved surface defined by the film. Accordingly, there is provided a damper device which is capable of stably exhibiting high damper performance, and in which the layout of channels which are connected to the damper device is simple.

Abstract: A liquid-droplet jetting apparatus includes a first common liquid chamber which supplies a liquid to first pressure chambers communicating with first nozzles and extending in a predetermined direction; and a second common liquid chamber which supplies a liquid to second pressure chambers communicating with second nozzles and extending in the predetermined direction. The first and second common liquid chambers are overlapped in a plan view, and each having a substantial width. A damper for attenuating pressure wave which propagates to the first and second common liquid chambers is formed at a portion in which the first and second common liquid chambers are overlapped. Each of the first common liquid chamber, the second common liquid chamber and the damper is formed to have a width overlapping with one of the first and second pressure chambers, thereby making it possible to attenuate the pressure wave efficiently.

Abstract: An inkjet printer includes a printhead integrated circuit (IC) with an array of nozzles for ejecting ink on to print media; an ink supply reservoir for storing ink, the ink supply reservoir having rigid walls and an air inlet for supplying air into the ink supply reservoir; an ink supply line defining a flow path from the ink supply reservoir to the printhead IC; and a pulse damper positioned along the flow path, the pulse damper for decreasing an amplitude of pressure pulses in the ink. The pulse damper is a compliant section of the ink supply line adapted to elastically flex.

Abstract: An inkjet printer includes a printhead integrated circuit (IC) with an array of nozzles for ejecting ink on to print media; an ink supply reservoir for storing ink; an ink supply line defining a flow path from the ink supply reservoir to the printhead IC; a valve in the ink supply line proximate the printhead IC selectively closing the flow path to the printhead IC; an ink purge actuator for forcing a volume of ink out of the printhead under pressure; a printhead maintenance system having a collection roller for rotating such that the collection roller surface collects ink purged from the printhead and draws the ink away; and a pressure regulator provided in the ink supply reservoir downstream from the ink supply reservoir. The pressure regulator is normally biased shut, and operable to open upon a threshold pressure difference between ink upstream of the pressure regulator and ink downstream of the pressure regulator.

Abstract: An inkjet printer that has an elongate array of nozzles for ejecting ink and ink conduits for supplying the array of nozzles with ink. The ink conduits are aligned with the longitudinal extent of the elongate array and have a plurality of pulse dampers individually in fluid communication with the ink conduits. Each pulse damper contains a volume of gas for compression by pressure pulses in the ink conduits, distributed along the length of the elongate array. A pressure pulse moving through an elongate printheads, such as a pagewidth printhead, can be damped at any point in the ink flow line. However, the pulse will cause nozzle flooding as it passes the nozzles in the printhead integrated circuit, regardless of whether it is subsequently dissipated at the damper. By incorporating a number of pulse dampers into the ink supply conduits immediately next to the nozzle array, any pressure spikes are damped at the site where they would otherwise cause detrimental flooding.

Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.

Abstract: A liquid delivering device including: a flow passage unit having a plurality of pressure chambers each of which communicating with a liquid ejection port; a piezoelectric actuator for selectively changing the volume of the plurality of pressure chambers, the piezoelectric actuator including a plurality of individual electrodes corresponding to the plurality of pressure chambers, a common electrode opposing the plurality of individual electrodes, and a piezoelectric layer sandwiched between the plurality of individual electrodes and the common electrode; and a rigidity reduction section which reduces the rigidity of the piezoelectric actuator and which is provided in an area where at least the pressure chamber is formed and in a vicinity of the individual electrode, in perspective plan view.

Abstract: An inkjet printer with a printhead integrated circuit (IC) (28), an ink supply reservoir (6) for storing ink, an ink supply line (3) defining a flow path from the ink supply reservoir to the printhead IC (28). A pulse damper (16) positioned along the flow path to decrease the amplitude of pressure pulses in the ink.

Abstract: A drop emitting apparatus including a manifold, a viscoelastic structure acoustically coupled to the manifold, and a plurality of drop generators fluidically coupled to the manifold.

Abstract: A thermal ink jet printhead (40) for the emission of droplets of ink on a print medium (46) comprises a reservoir (103) containing ink (142), a die (61), a slot (102) engraved in said die (61) and a plurality of ejectors (73), each of which in turn comprises a chamber (74), a resistor (27) and a nozzle (56), each of said chambers (74) being put in fluid communication with said slot (102) through a plurality of elementary ducts (72) lying on a different plane from the bottom (67) of said chamber (74).

Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.

Abstract: A liquid discharging head is provided. The liquid discharging head has a flow path unit in which a common liquid flow path for supplying liquid to a nozzle which discharges liquid is formed by a plurality of plates being stacked together, the plurality of plates including a damper plate of which one surface defines at least a part of a wall surface of the common liquid flow path and an area on an other surface which is opposed to the common liquid flow path across the damper plate is not in contact with the plurality of plates other than the damper plate, wherein compression stress along the wall surface is applied to a portion of the damper plate which configure a wall of the common liquid flow path.

Abstract: A printer comprising: a printhead having an ink inlet and an ink outlet; an ink chamber for supplying ink to the printhead; an upstream ink line interconnecting an outlet port of the ink chamber and the ink inlet; a downstream ink line connected to the ink outlet; and a first air accumulator communicating with the downstream ink line. The first air accumulator is configured for dampening ink pressure pulses in the printhead during printing.

Abstract: An inkjet recording apparatus includes a main body and a print head. The main body includes a mechanical portion and a control portion. The mechanical portion includes a pump that pressurizes or draws a liquid(s), such as an ink and/or a solvent, and a solenoid valve that switches between flow channels guiding the liquid to flow therethrough. The control portion controls respective operations including printing and running and stopping of the inkjet recording apparatus. The print head includes a nozzle that atomizes the ink pressure fed from the main body into ink droplets, a charging electrode that electrically charges the ink droplets, a deflecting electrode that forms an electric field that deflects the charged ink droplets, and a gutter that collects the ink unused for printing. The nozzle includes a surface-treated layer that repels the ink to a portion where the ink is supplied.

Abstract: A printhead that has at least one printhead integrated circuit (IC) with an array of nozzles for ejecting ink and a support structure for supporting the printhead IC. The support structure has an ink conduit for supplying the array of nozzles with ink. The conduit has a set of resonant frequencies at which ink in the conduit generates a standing wave in response to certain operating modes of the array of nozzle. A fluidic damper is incorporated into printhead, the damper having a selected resonant frequency that damps the standing waves associated with each of the set of resonant frequencies such that they have an amplitude less than a maximum threshold.

Abstract: This invention provides a highly reliable liquid container without degrading a liquid accommodation efficiency or increasing a substantial cost. When the liquid container is impacted, the liquid container can protect against damage the flexible film that forms the liquid accommodation chamber. The recessed portion is provided on the inner surface of the cover member facing the plate material. Provided at the opening of the recessed portion is the shock absorbing sheet that elastically deforms into the recessed portion when the plate member is impacted.

Abstract: An inkjet printhead is provided. The printhead comprises a plurality of nozzle assemblies; a nozzle plate covering the plurality of nozzle assemblies; an ink supply system for supplying ink to the plurality of nozzle assemblies, the ink supply system comprising at least one conduit wall defined by part of the nozzle plate; and at least one pressure-dampening structure positioned in the part of the nozzle plate. The pressure-dampening structures dampen ink pressure fluctuations in the ink supply system.

Abstract: An inkjet printer is provided. The printer comprises an inkjet printhead having a plurality of nozzles; at least one ink reservoir; and an ink supply system for supplying ink from the reservoir to the plurality of nozzles, the ink supply system comprising at least one pressure-dampening structure for dampening pressure fluctuations experienced by the nozzles. A distance between the pressure-dampening structures and at least one of the nozzles is less than 100 microns.

Abstract: A piezoelectric inkjet printhead, and a method of manufacturing the same, includes an ink inlet for allowing inflow of ink, a plurality of pressure chambers to contain ink to be ejected, the plurality of pressure chambers being in communication with the ink inlet, a manifold formed in communication with the ink inlet, a plurality of restrictors connecting the manifold to respective first ends of the pressure chambers, a plurality of dampers at positions corresponding to respective second ends of the pressure chambers, the second ends being opposite the first ends, a plurality of nozzles in communication with the plurality of dampers for ejecting the ink, a plurality of actuators for applying a driving force to each of the pressure chambers for ejecting the ink, a damping membrane under the manifold for dampening a pressure change inside the manifold and a cavity under the damping membrane.

Abstract: An image forming apparatus is disclosed that includes a liquid discharger including a liquid discharge head configured to discharge a droplet of liquid so as to form an image. The liquid discharge head includes multiple individual channels communicating with corresponding nozzles from which the liquid is discharged; a common channel configured to supply the liquid to the individual channels; a deformable member configured to form at least one wall face of the common channel; and a vibration damping member formed of a viscoelastic material, the vibration member being provided in contact with the deformable member.

Abstract: The image forming apparatus includes a liquid discharging head that discharges a liquid; and a damper chamber that is provided in a liquid supply flow channel, the damper chamber being an internal space that is formed by bonding a flexible member to a base member, wherein the flexible member has a bonding surface that is bonded to the base member, an opening that is formed in the bonding surface, and a swollen portion that is three-dimensionally swollen from the edge of the opening to form the damper chamber, the base member has a communicating port, through which the damper chamber and the liquid supply flow channel communicate with each other, in a state where the base member is bonded to the bonding surface of the flexible member and closes the opening, and the flexible member is disposed such that the swollen portion is swollen in a gravity direction.

Abstract: An inkjet printer that has an elongate array of nozzles for ejecting ink and ink conduits for supplying the array of nozzles with ink. The ink conduits are aligned with the longitudinal extent of the elongate array and have a plurality of pulse dampers individually in fluid communication with the ink conduits. Each pulse damper contains a volume of gas for compression by pressure pulses in the ink conduits, distributed along the length of the elongate array. A pressure pulse moving through an elongate printheads, such as a pagewidth printhead, can be damped at any point in the ink flow line. However, the pulse will cause nozzle flooding as it passes the nozzles in the printhead integrated circuit, regardless of whether it is subsequently dissipated at the damper. By incorporating a number of pulse dampers into the ink supply conduits immediately next to the nozzle array, any pressure spikes are damped at the site where they would otherwise cause detrimental flooding.

Abstract: A liquid ejection head including: a head main body including: a cavity unit including a passage forming base plate forming a liquid passage from a common liquid chamber to a nozzle opening via a pressure chamber; and a pressure generating source generating a change of pressure of liquid in the pressure chamber to eject the liquid in the pressure chamber as a liquid droplet from the nozzle opening; and a case member to which the head main body is attached and which includes: a first member provided with a first atmosphere opening passage; and a second member laminated on the first member and provided with a second atmosphere opening passage, wherein the first and second atmosphere opening passages communicate with each other under the laminated state and are opened to atmosphere.

Abstract: An inkjet recording head includes a base member, an ink channel unit, a plurality of piezoelectric elements, and a dynamic vibration absorber. The ink channel unit is formed with a plurality of nozzle holes and a plurality of ink pressure chambers. The ink channel unit includes a diaphragm that defines part of each ink pressure chamber. Each piezoelectric element has one end fixed to the base member and another end attached to the diaphragm. Each piezoelectric element generates displacement in a displacement direction for deforming the diaphragm to eject ink droplets through a corresponding one of the plurality of nozzle holes. The dynamic vibration absorber is mounted on the base member for damping vibrations of the base member due to a resonance, the resonance occurring in a frequency range less than or equal to a predetermined frequency.

Abstract: An electrostatic actuator for increasing a swing (deflection angle) of a movable structure includes a laminate substrate in which a thin film silicon layer is formed on a silicon substrate through a buried insulating film and a torsion beam movable structure constructed with the thin film silicon layer. A potential difference is generated between a movable side comb-tooth electrode of the movable structure and a fixed side comb-tooth electrode disposed to face the movable side comb-tooth electrode to swing the movable structure. The fixed side comb-tooth electrode is formed in the inside of a through hole bored through the laminate substrate.

Abstract: An inkjet printer for jetting ink that is substantially free of solvent, the printer containing a printhead having an ink chamber with an ink inlet and an ink outlet, an ink supply reservoir in fluid connection with the chamber via the ink inlet, an electromechanical transducer in operative connection with the ink chamber for generating pressure waves herein, and a heater for substantially uniformly heating the ink in the ink chamber, wherein the ink inlet includes a constricting element such that the pressure drop over the constricting element in the direction from the reservoir to the chamber is smaller than the pressure drop over said element in the opposite direction for the same net fluid flow and wherein the ratio of the length of the constricting element and the mean diameter of the constricting element is less than 10.

Abstract: A printhead for an inkjet printer that has an elongate array of nozzles (68) for ejecting ink and ink conduits for supplying the array of nozzles with ink. The ink conduits extend adjacent the elongate array and have a plurality of pulse dampers individually in fluid communication with the ink conduits, each containing a volume of gas for compression by pressure pulses in the ink conduits, distributed along the length of the elongate array. A pressure pulse moving through an elongate printheads, such as a pagewidth printhead, can be damped at any point in the ink flow line. However, the pulse will cause nozzle flooding as it passes the nozzles in the printhead integrated circuit, regardless of whether it is subsequently dissipated at the damper. By incorporating a number of pulse dampers into the ink supply conduits immediately next to the nozzle array, any pressure spikes are damped at the site where they would otherwise cause detrimental flooding.

Abstract: A piezoelectric inkjet head includes a plurality of pressure chambers filled with ink that is to be ejected, a manifold to supply ink to the pressure chambers and extending in both sides of each of the pressure chambers parallel to a direction in which the pressure chambers are arranged, a restrictor to connect the manifold to each of the pressure chambers, and to be connected to both ends of each of the pressure chambers in a longitudinal direction, a plurality of piezoelectric actuators respectively corresponding to the pressure chambers, and at least one nozzle respectively connected to each of the pressure chambers, and to be symmetrically arranged with respect to the centerline in a longitudinal direction of each of the pressure chamber.

Abstract: A flow path structure includes a heating element, a barrier layer, a liquid chamber formed by a part of the barrier layer and a pair of walls confronting each other to hold the heating element therebetween and a first individual flow path and a second individual flow path disposed on both the sides of the liquid chamber to communicate with the liquid chamber, a liquid is supplied to the liquid chamber from at least one of first and second individual flow paths, and the distance U between the walls in the liquid chamber and the flow path width W of the first individual flow path are set to satisfy U>W. With this arrangement, a flow path structure can be provided in which a failure in flow paths due to dusts is unlike to occur and which minimizes the influence of bubbles and has almost no uneven ejection.

Abstract: An inkjet printhead includes: a cavity unit having aligned nozzles, pressure chambers correspondingly aligned, and a common-chamber member having a common chamber connected, at an introduction place, to an ink source to receive and distribute ink to the pressure chambers, and extending along the pressure chambers row to overlap each pressure chamber when seen in the superposition direction, and a cross-sectional area of the common chamber perpendicular to its longitudinal direction gradually decreases in a direction away from the introduction place, at a portion remote from the introduction place; an actuator on the cavity unit to pressurize the distributed ink to eject ink droplets from the nozzles; and a compensating member having a rigidity lower than that of the common-chamber member, and being disposed in contact with the ink, at the remote portion so that a supporting rigidity of the common-chamber member is substantially uniform along the pressure chambers row.

Abstract: Inks are supplied from ink inflow flow passages to ink storage chambers in a subtank. The inks are further supplied from the ink storage chambers via ink outflow flow passages to a head. The ink storage chambers are stacked in the vertical direction, with upper surfaces or lower surfaces thereof being defined by damper films respectively. Parts of upper surfaces of the ink inflow flow passages and parts of upper surfaces of the ink outflow flow passages are defined by gas-permeating films. The gas, which is contained in the liquids in the ink inflow flow passages and the ink outflow flow passages, is discharged via the gas-permeating film to a gas discharge passage. The gas is prevented from the outflow together with the liquids from the liquid supply apparatus.

Abstract: A fluid path unit for a fluid ejection device, includes: first pressure chambers arrayed in a first pressure chamber row; second pressure chambers arrayed in a second pressure chamber row adjacent to the first pressure chamber row; first outlet paths, through which the first pressure chambers respectively communicate with first nozzles, the first outlet paths arrayed in a first outlet path row; second outlet paths, through which the second pressure chambers respectively communicate with second nozzles, the second outlet paths arrayed in a second outlet path row; a common fluid reservoir; and first connection paths, though which the first pressure chambers communicate with the common fluid reservoir. Each of the first connection paths extends across the second outlet path row.

Abstract: An inkjet nozzle with an elongate ink inlet channel that defines a straight flow path of a length sufficient to provide enough viscous damping to prevent significant reverse flow of ink in the channel when an ink drop is ejected from the nozzle. This removes the need to form ink supply channels with complex geometries such as pinch points and baffles in order to have the required hydraulic resistance to reverse flow. The nozzle packing density on the printhead can be significantly increased if these complex geometries are not formed adjacent the chambers. The ink can be supplied from the ‘back’ surface of the wafer, thereby removing the need for ink feed channels beside the chambers. This provides more room for the power and print data to be connected to each nozzle along the front surface of the wafer.

Abstract: A drop emitting apparatus including a manifold, a viscoelastic structure acoustically coupled to the manifold, and a plurality of drop generators fluidically coupled to the manifold.

Abstract: A compliant chamber for use in a fluidic ink jetting system having a jetting device, such as a printhead, and a fluid reservoir, the compliant chamber comprising a chamber body having an inlet for a fluid and an outlet for the fluid, the body defining an open region therein, a cover for closing the body and for further defining the open region, and a resilient material disposed in the open region, the resilient material being an energy absorbing material, wherein fluidic pressure fluctuations are absorbed by the resilient material in the open region. A method of using such is also disclosed.