Abstract: An inkjet print head includes a substrate in which an ink feed hole having an hourglass cross-section is formed, a chamber layer that is stacked on the substrate and has a plurality of ink chambers into which ink supplied from the ink feed hole is filled, and a nozzle layer that is stacked on the chamber layer and has a plurality of nozzles through which the ink is ejected.

Abstract: An ink jet head having a channel damper, and a method of fabricating the same. The ink jet head includes a heat-generating resistor disposed on a substrate to generate pressure for ink ejection, a chamber layer disposed on the substrate to enclose the heat-generating resistor and having a first height from the substrate in order to provide at least one opened portion, and a channel damper disposed at the opened portion to completely enclose the heat-generating resistor together with the chamber layer and having a second height lower than the first height is disposed at the opened portion. A nozzle layer having a nozzle corresponding to the heat-generating resistor is disposed to be in contact with an upper surface of the chamber layer.

Abstract: Embodiments of the present invention relate to a pressure damping ink filter for use with an ink jet printer. The pressure damping ink filter includes at least one flow control member and a filter. The flow control member, in combination with any pressure damping provided by the thickness of the filter medium and the ink volume capacity of the filter housing, may substantially reduce, if not eliminate, pressure fluctuations in the ink stream that are generated by a high frequency electric pump. The flow control member may be a fixed or variable input restrictor and a fixed or variable output restrictor. The input restrictor and/or output restrictor may also be located inside or outside of the filter housing. Further, the input and output restrictors may be molded as part of the filter housing or the filter itself.

Abstract: An inkjet print head including a chamber layer provided with an ink via, at least one ink chamber having a heater, and at least one ink channel connecting the ink via and the ink chamber; and a nozzle layer provided with at least one nozzle at a position corresponding to the ink chamber. The ink channel is provided with a multi-functional structure. The multi-functional structure performs functions of a filter and a restrictor.

Abstract: To reduce a fluctuation in pressure of ink supplied in an ink-jet head due to vibration of an ink tank through movement of a carriage, and to prevent density unevenness due to the pressure fluctuation from being caused in printing, the present invention provides a pressure buffer which is provided in an ink supply path connecting an ink-jet head to an ink supply portion for supplying ink to the ink-jet head, an opening portion is provided in a chamber of the pressure buffer, and the opening portion communicates with an ink flow path provided along a side wall of the chamber and is connected to an ink flow outlet provided in a position lower than the opening portion. In the ink flowpath in the vicinity of the ink flow outlet, a hole which communicates with the chamber is provided.

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 ink jet printer including a housing; a carriage which is movable in the housing relative thereto; an ink jet recording head which is mounted on the carriage and which has a plurality of ink supply channels; a damping device which is mounted on the carriage and which includes a plurality of damping chambers corresponding to the ink supply channels, respectively; an ink-tank supporting portion which is provided in the housing and which supports a plurality of ink tanks; and a plurality of ink supply tubes each of which supplies an ink from a corresponding one of the ink tanks to a corresponding one of the ink supply channels of the ink jet recording head via a corresponding one of the ink supply tubes and a corresponding one of the damping chambers. The damping device further includes a primary partition wall which separates at least one first damping chamber of the damping chambers, from at least one second damping chamber of the damping chambers.

Abstract: An ink discharging apparatus includes a channel unit and actuators. The channel unit has a manifold and separate ink channels, and includes an actuator plate. The ink channels extend from the manifold, each via a pressure chamber to a nozzle. The actuators are fixed to the channel unit, each of which changes the volume of one of the pressure chambers. Each of the pressure chambers is fitted with a barrier block in its bottom surface. The barrier block crosses the line segment connecting an ink inlet port and an ink outlet port. The barrier block has a height which makes no contact with the actuator plate, which is displaced partially when one or more of the actuators are driven. The ink discharger is low in power consumption and can be manufactured at low cost.

Abstract: A liquid discharge apparatus includes a pressure chamber which is connected to a nozzle via a nozzle passage and in which a liquid pressure is configured to be changed to discharge liquid from the nozzle. A liquid supply passage connects a liquid supply chamber and the pressure chamber. A fluid resistance providing mechanism is provided in at least one of the liquid supply passage and the nozzle passage. A first fluid resistance of the fluid resistance providing mechanism along a first flow direction from the liquid supply chamber toward the nozzle is smaller than a second fluid resistance of the fluid resistance providing mechanism along a second flow direction from the nozzle toward the liquid supply chamber.

Abstract: A method of fabricating a fluid ejection device comprises providing a barrier layer which defines fluidic spaces. The fluidic spaces defined by the barrier layer are filled with filler. A throughway is etched through the substrate. The filler is removed from the fluidic spaces after etching the throughway.

Abstract: A reservoir unit of an inkjet head has a plurality of laminated reservoir plates that forms an ink supply channel, and a flexible film that absorbs a fluctuation of pressure of ink in an ink reservoir. The flexible film is provided between adjacent two reservoir plates of the laminated plates. The adjacent two reservoir plates forms the ink reservoir. The flexible film partitions the ink reservoir into a first space to be filled with ink and a second space to be filled with no ink.

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: An ink jet printhead includes a substrate that defines a plurality of ink inlets. A drive circuitry layer is positioned on the substrate. A plurality of nozzle arrangements is arranged on the substrate. Each nozzle arrangement includes a nozzle chamber structure positioned on the substrate and defining a nozzle chamber in fluid communication with a respective ink inlet, and an ink ejection port in fluid communication with the nozzle chamber. An actuator is connected to the drive circuitry layer and is displaceable with respect to the substrate on receipt of an electrical signal from the drive circuitry layer. An ink ejection member is operatively positioned with respect to the nozzle chamber and is displaceable when the actuator is displaced such that ink is ejected from the ink ejection port. The ink ejection member is configured so that the ink ejection member obstructs a flow of ink from the nozzle chamber into the inlet at a certain position in a displacement path of the ink ejection member.

Abstract: An ink path structure and an inkjet printhead including an ink chamber to be filled with ink to be ejected, a nozzle through which the ink in the ink chamber is ejected, an ink feed hole to supply the ink to the ink chamber, and a restrictor connecting the ink chamber and the ink feed hole, the restrictor including a flow resistance control portion in which an ink path toward the ink feed hole is formed to be longer than an ink path toward the ink chamber such that a flow resistance toward the ink feed hole greater than a flow resistance toward the ink chamber.

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 head chip has a first face formed with nozzle orifices from which ink is ejected, and a second face formed with at least one ink inlet communicated with the nozzle orifices. An ink passage communicates the nozzle orifices with the ink supply source to supply ink to be ejected. A filter is disposed in the ink passage at an upstream side of the ink inlet. The filter has a first face directed to an upstream side of the ink passage. A cover member covers at least a part of the first face of the filter, the cover member being adapted to allow ink in the ink passage to pass through while preventing air bubbles contained in the ink from coming in contact with the first face of the filter.

Abstract: An ink-jet head comprises a passage unit formed with a plurality of nozzles for ejecting ink, a reservoir unit bonded to the passage unit, and actuator units for applying an ejection energy to ink in the passage unit. The reservoir unit is formed therein with an ink reservoir extending along a bonding surface between the reservoir unit and the passage unit. The ink reservoir reserves ink supplied from an ink tank and supplies the reserved ink to the passage unit. The ink reservoir is formed therein with a plurality of pillars supporting upper and lower walls of the ink reservoir.

Abstract: An ink chamber for an ink supply system in a printer. The ink chamber comprises a baffle unit housed within a housing. The baffle unit comprises a plurality of baffles. The baffle unit is divided into a plurality of separate sections.

Abstract: A device and method are provided combining the thermal and mechanical attributes of two distinct materials: shape memory materials and super-cooled liquids (SCLs). In one example of the invention, the super-cooled liquid is contained within a shape memory polymer (SCL liquid is filled into a shape memory polymer tube), so that the heat released by the SCL when it is mechanically triggered to crystallize itself triggers the shape change of the shape memory polymer. The device is suitable as a reusable warmer, as a dental mold material, in medical applications where reusable heat packs are indicated, particularly for application to difficult contours, and for large deployable structures such as satellite antennae and temporary shelters.

Abstract: An ink tank is provided which can apply an optimum negative pressure stably by a valve of a simple structure. To this end, the ink tank of this invention has a valve and a damper section installed in an ink flow path. The valve deforms when the negative pressure in the ink supply port is greater than a predetermined level, to temporarily open the ink flow path to introduce ink from the ink accommodation portion to the ink supply port. The damper section is installed between and communicates to the ink supply port and the valve in the ink flow path. The damper section is formed of a resilient member more easily deformed than the valve and applies a negative pressure to the interior of the ink supply port by an elastic recovery force of the resilient member.

Abstract: A pressure buffer of an ink-jet recording apparatus is placed in the vicinity of an ink-jet recording head in an ink supply path connecting an ink container to the ink-jet recording head. A body of the pressure buffer has a concave portion at least on one surface, and a flexible film is attached to tightly close the concave portion to form a chamber. The chamber has an ink flow outlet through which ink flows from the chamber to the ink-jet recording head and an ink flow inlet through which ink flows from the ink container to the chamber. The ink flow outlet is always positioned in an uppermost portion in a vertical direction of the chamber, and the ink flow inlet is positioned at an equal level or on a lower side in a vertical direction with respect to the ink flow outlet.

Abstract: A printhead assembly includes an ink storage and distribution assembly connectable to an ink supply. An elongate printhead integrated circuit is mounted on the ink storage and distribution assembly to receive ink therefrom. A housing is positioned on the ink storage and distribution assembly. A pair of busbars is mounted on the housing. A tape automated bonding strip is connected between each busbar and the printhead integrated circuit to provide power and control signals to the printhead integrated circuit.

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 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: An ink chamber, suitable for an ink supply system in a portable printer, is provided. The ink chamber comprises a plurality of baffles with different sizes for minimizing ink flow fluctuations in the ink supply system. The ink chamber is typically elongate and divided into a plurality of elongate sections, each section corresponding to a different colored ink. The baffles are typically transverse baffles in the elongate ink chamber.

Abstract: An ink chamber, suitable for an ink supply system in a portable printer, is provided. The ink chamber comprises a baffle unit with plurality of baffles for minimizing ink flow fluctuations in the ink supply system. The ink chamber and the baffle unit are typically elongate and divided into a plurality of elongate sections, each section corresponding to a different colored ink. The baffles are typically transverse baffles in the elongate ink chamber.

Abstract: An ink supply system, suitable for supplying ink to a printhead contained in a portable electronic device, is provided. The ink supply system comprises: (a) at least one ink reservoir; (b) a corresponding ink chamber for each ink reservoir, each ink chamber being in fluid communication with its respective reservoir, wherein each ink chamber comprises a plurality of baffles for minimizing ink flow fluctuations in the ink supply system; and (c) an ink manifold in fluid communication with each ink chamber, the ink manifold comprising a plurality of ink channels configured to distribute ink from each ink chamber to a plurality of ink inlets in a printhead.

Abstract: A printhead includes a silicon substrate, a first barrier layer, a second barrier layer, and a nozzle plate. The silicon substrate has a plurality of thermal elements and a main ink supply channel, each of the thermal elements being in a firing chamber of the first barrier layer and in fluid communications with the main ink supply channel through ink channels. The top of each ink firing elements is aligned with a nozzle on the nozzle plate. To satisfy the need for high-frequency ink ejection, the second barrier layer is utilized to provide an auxiliary ink supply channel for increasing the ink supply speed. The ink channel between the main ink supply and the ink channel inlet is enlarged in the vertical direction so as to lower the pressure and thus increase the ink supply speed.

Abstract: A cavity unit of an ink-jet printhead is formed by laminating a base plate formed with pressure chambers, a spacer plate, a manifold plate, a damper plate, a cover plate, and a nozzle plate formed with nozzles. The manifold plate is formed with a manifold chamber that penetrates through the manifold plate. The damper plate is formed with a recess on a side facing away from the manifold chamber and a damper wall left on a side facing the manifold chamber to have a partial thickness of the damper plate. The damper plate is bonded to the manifold plate on an opposite side from the base plate such that the damper wall is positioned to face the manifold chamber. The cover plate is bonded to the manifold plate to seal the recess. Because the damper plate is relatively thick while the damper wall is thin enough to absorb a pressure wave in the manifold chamber generated upon ink ejection, the damper plate is easy to handle.

Abstract: A pagewidth inkjet printer for a portable electronic device. The printhead has an array of nozzles for printing on a media substrate. An ink supply manifold establishes fluid communication between an ink supply and the nozzle array. The manifold defines a tortuous fluid path that dampens any fluid flows caused by movement of the device. Feeding ink along the entire length of the pagewidth printhead via a tortuous path through a manifold will allow the relatively slow ink flows cause by nozzle refills, but will resist the faster ink flows caused by user handling of the device.

Abstract: A liquid ejection head includes a liquid path; an ejection outlet forming member which constitutes a part of a wall of the liquid and which forms an ejection outlet for ejecting a droplet of liquid; a heat generating element, provided at a position opposing to the ejection outlet of the wall of the liquid flow path, for generating a bubble in the liquid by application of heat to the liquid; a restrictor portion, provided at a recessed portion of the ejection outlet, wherein the recessed portion is recessed from a plane in which the ejection outlet is formed, wherein the liquid forms a meniscus and is retained in the ejection outlet such that the restrictor portion is within the liquid, wherein an area So of an opening of the restrictor portion and a surface Sh of the heat generating element satisfy So?Sh. According to this invention, a central portion of the meniscus opposed to the fine opening at the ejection outlet bulges, and the liquid is ejected in this state.

Abstract: An ink chamber, suitable for an ink supply system in a portable printer, is provided. The ink chamber comprises a plurality of baffles for minimizing ink flow fluctuations in the ink supply system. The ink chamber is typically elongate and divided into a plurality of elongate sections, each section corresponding to a different colored ink. The baffles are typically transverse baffles in the elongate ink chamber.

Abstract: The ink-jet head of this invention includes a nozzle plate in which a nozzle is formed; a pressure chamber part in which a pressure chamber charged with an ink is formed; an ink passage part in which an ink supplying passage for supplying the ink to the pressure chamber is formed; a piezoelectric actuator for applying a pressure to the pressure chamber for discharging the ink from the nozzle; a damper wall for separating the ink supplying passage from an air chamber; and a communicating hole for communicating the air chamber with the atmospheric air.

Abstract: A pagewidth inkjet printer for a portable electronic device, with a roll of media substrate wrapped on a central former having at least one ink reservoir for the printhead, and a media feed assembly for drawing the media substrate a substrate passed the printhead. This configuration allows the printers to be compact enough to be incorporated into portable devices without it becoming too bulky and unwieldy. A roll of media is more easily positioned amongst other components of the device that flat sheets of media. It is a space efficient form of media storage when the ink reservoirs are located within the central former and feeding the media from a roll passed a pagewidth printhead is mechanically simpler than feeding sheets passed a scanning printhead.

Abstract: An ink supply unit for supplying separate color inks to a portable ink jet print head, the ink supply unit including: a slot for insertion of the printhead; a series of elongated chambers for the storage of the separate color inks, the chambers being interconnected with the slot for the supply of ink to the printhead; a series of conductive rails along the outside of the ink supply unit, each conductive rail interconnected to a power supply at a series of points along the conductive rail; a tape automated bonding strip along the outside of the ink supply unit having a series of control lines along one surface thereof for mating with a corresponding external series of control lines, the tape automated bonding strip further having a repeating series of interconnects to the printhead, the interconnects interconnecting the control lines and the conductive rails to the printhead. The unit can be detachable from the power supply and the external series of control lines.

Abstract: The present invention allows a buffer portion to sufficiently restrain the vibration of ink in a print head. To achieve this, the buffer portion is disposed close to a channel between a common chamber and an ejection opening and is filled with at least one bubble, and then excess of the at least one bubble is removed through the ejection opening.

Abstract: A head chip has a front face formed with nozzle orifices, and a rear face formed with at least one ink inlet. A damping chamber forming member is laminated on the rear face of the head chip. The damping chamber forming member has at least one damping chamber for dampening pressure fluctuation occurred therein, and an ink supply port for supplying ink from the damping chamber to the head chip.

Abstract: A pressure buffer of an ink-jet recording apparatus is placed in the vicinity of an ink-jet recording head in an ink supply path connecting an ink container to the ink-jet recording head. A body of the pressure buffer has a concave portion at least on one surface, and a flexible film is attached to tightly close the concave portion to form a chamber. The chamber has an ink flow outlet through which ink flows from the chamber to the ink-jet recording head and an ink flow inlet through which ink flows from the ink container to the chamber. The ink flow outlet is always positioned in an uppermost portion in a vertical direction of the chamber, and the ink flow inlet is positioned at an equal level or on a lower side in a vertical direction with respect to the ink flow outlet.

Abstract: An inkjet print head chip. The chip has a first column of firing chambers and a second column of firing chambers in which each firing chamber comprises a heater and an ink channel. A first ink slot is formed between the first column of firing chambers and the periphery of the chip, in which the first ink slot comprises a plurality of first ink sub-slots and each first ink sub-slot provides ink to part of heaters in the first column of firing chambers. A second ink slot is formed between the second column of firing chambers and the periphery of the chip to provide ink to the heaters in the second column of firing chambers. A dry film is patterned on the entire surface of the chip to separate the first ink sub-slots.

Abstract: An ink-jet head includes a plurality of nozzles for ejecting ink, a first flat plate layer formed by aligning a plurality of pressure chambers communicating with the nozzles respectively and including at least one sheet of flat plates, a second flat plate layer formed with a common ink chamber having a shape elongated in a direction of aligning the pressure chambers and comprising at least one sheet of the flat plates, an ink supply passage connecting the common ink chamber and an ink supply source, a flat plate member in a shape of a thin film disposed between the first flat plate layer and the second flat plate layer, a restriction flow passage formed at the flat plate member for communicating one end thereof to the pressure chamber, communicating the other end thereof to the common ink chamber and controlling a flow of ink between the pressure chamber and the common ink chamber, and a damper chamber formed at the flat plate layer facing the flat plate member on a side thereof opposed to the common ink cham

Abstract: There is disclosed an ink jet printhead which comprises a plurality of nozzles 3 and one or more heater elements 10 in a bubble forming chamber 7 corresponding to each nozzle 3. Each heater element 10 is configured to heat a bubble forming liquid 11 in the printhead to a temperature above its boiling point to form a gas bubble 12 therein. The generation of the bubble 12 causes the ejection of a drop 16 of an ejectable liquid (such as ink) through an ejection aperture 5 in each nozzle 3, to effect printing. The transient rise in pressure within the bubble forming chamber when the bubble forms is less than 20 MPa. Keeping the transient pressures relatively low, the strength requirements of the printhead structures are reduced. Accordingly the dimensions of the components can reduced for more compact design and easier manufacture.

Abstract: An ink supply system suitable for use in a portable printer is disclosed. The ink supply system comprises at least one ink reservoir and a corresponding respective ink chamber for each ink reservoir. The ink chamber is in fluid communication with its respective reservoir and each ink chamber comprises a plurality of baffles for minimizing ink flow fluctuations in the ink supply system. The ink supply system also comprises an ink manifold in fluid communication with each ink chamber. The ink manifold comprises a plurality of ink channels configured to distribute ink from each ink chamber to a plurality of ink inlets in a printhead.

Abstract: An ink jet printer uses an ink tank storing ink to be supplied to a print head, an ink tube, an ink chamber mounted on a carriage to store ink to be supplied from the ink tank to the print head, and a connecting member that includes an ink outflow port connected to the ink chamber and an ink inflow port where ink flows from the ink tube. At an intersection of the ink inflow port and the ink outflow port, a direction of a flow of ink from the ink inflow port is changed. Further at the intersection, a cushion is provided to absorb pressure waves generated in the ink tube on an extended line in an initial direction where ink flows in the ink passage over the intersection.

Abstract: A microinjector uses bubbles as virtual valves to eject droplets of different sizes. The microinjector is in fluid communications with a reservoir and has a substrate, an orifice layer, and a plurality of nozzles. The substrate has a manifold for receiving ink from the reservoir. The orifice layer is positioned on the top of the substrate so that a plurality of chambers are formed between the orifice layer and the top of the substrate. Each of the nozzles has an orifice and at least three bubble generating components. The bubble generating components are selectively driven by a driving circuit so that each nozzle can eject droplets of different sizes.

Abstract: The ink replenishment frequency is increased in an inkjet head having nozzles for injecting ink. Independent dampers are provided in ink supply passages to impart an acoustic capacitance to the ink supply passages, and therefore a reciprocal action is generated between the pressure chambers and the ink supply passages, whereby the operation of ink replenishment can be stimulated. Accordingly, the ink replenishment frequency can be increased by a factor of approximately 3, without having to provide functional elements in the ink supply passage.

Abstract: Disadvantages relating to ink refill specific to an increase in a number of ink ejection openings in an ink jet print head is eliminated to provide a particularly excellent fast-response capability and ejection performance. More specifically, when an ink is supplied to a liquid chamber via an ink supply path and an ink supply opening formed in a support member and a print element substrate in a print head, and is then ejected from ejection openings, a pressure of an ink effected upon the ejection is transmitted to the ink supply path. This pressure, however, can be absorbed by air chambers via communication paths to reduce adverse effects of the pressure on ink refill in the liquid path after the ejection. In this case, since the air chambers and other components are structured to be closed with respect to the atmosphere, problems such as an increase in viscosity which are associated with communication of the air chambers and other components with the atmosphere can be prevented.

Abstract: A pressure absorbing apparatus is disposed between a tank for a liquid and an ejecting head that ejects the liquid from the tank onto an ejection object. The pressure absorbing apparatus is configured such that droplets are ejected from the ejecting head in a stable manner irrespective of the properties of the liquid. A corrosion-resistant material is used to form the surfaces of a droplet inlet, a droplet outlet, a channel, and the pressure absorbing portion that contact the liquid. This pressure absorbing apparatus is used in an ejector apparatus, that can be used to manufacture an electrooptical device having a color filter or an EL element, and that can be used to manufacture an electronic apparatus with this electrooptical device. A device having a base is manufactured with an ejected pattern that is formed by using the ejector apparatus.

Abstract: A thermal ink jet printer for printing an image on a receiver and method of assembling the printer. The printer comprises a print head defining a first chamber and a second chamber therein. The first chamber contains a working fluid and the second chamber contains an ink body. A flexible membrane separates the first chamber and the second chamber. A first transducer in the first chamber induces a first pressure wave in the working fluid that flexes the membrane into the second chamber to pressurize the ink body and eject an ink drop from the second chamber through an outlet. A second transducer in the first chamber induces a second pressure wave that flexes the membrane into the second chamber to damp the first pressure wave transmitted into the second chamber.

Abstract: An ink chamber structure for an inkjet printhead, comprising a plurality of ink channels and a plurality of ink chambers arrayed in columns, with each of such plurality of ink chambers corresponding to an ink channel; the plurality of ink channels respectively channels ink from two sides of such column into ink chambers. The openings for part of the ink chambers are located on one side of the column installation, whereas the openings for the rest of the ink chambers are located on the other side of the column installation. By utilizing the cavity between two adjacent ink chambers on the same side to install an ink chamber from the other side, higher density of ink chamber installment can be achieved in the same scope of space. Also, with the ink chambers on the left and right sides being indentedly arranged, the ink chambers are provided with larger ink-inlet angles, thus effectively avoiding disturbance that adversely affects the reception of ink by the chambers.