Abstract: The present invention prevents bubbles from remaining in an ink passage and inhibits crosstalk when ink is jetted in an ink-jet print head. Ink-jet nozzles are formed inside a nozzle plate in the front of the ink-jet print head, a plurality of pressure chambers are provided at the rear of the nozzle plate, and an ink reservoir is connected to the pressure chambers. An ink supply passage has an exit which is connected to the ink reservoir. The diameter of the ink supply passage is reduced at the exit connected to the ink reservoir, and the diameter at the exit is smaller than the width and the depth of the ink reservoir. The rear surface of the ink reservoir is covered with a flexible and elastic film, except for a connection between the ink reservoir and the exit of the ink supply passage, at a location remote from a connection between the ink reservoir and each of the pressure chambers. The exit of the ink supply passage absorbs the pressure of an ink jet from each of the pressure chambers.

Abstract: A liquid jetting head of the invention includes a flowing-path plate through which a flowing-path space is formed as a flowing-path for a liquid. A nozzle plate is provided on one side surface of the flowing-path plate, said nozzle plate having a nozzle that is communicated with the flowing-path space. A sealing plate is provided on the other side surface of the flowing-path plate for sealing the flowing-path space. A portion of the other side of the flowing-path space forms a pressure-chamber space. A portion of the other side of the flowing-path plate including at least a portion of the pressure-chamber space is formed by electrocasting. A pressure-generating unit is provided at a portion of the other side of the sealing plate corresponding to the pressure-chamber space for changing a pressure of the liquid in the pressure-chamber space.

Abstract: A dummy piezoelectric element is disposed at least at one of the ends of an array of piezoelectric vibration elements. A region not including internal electrodes is provided in the vicinity of the outer side surface of the dummy piezoelectric vibration element to be formed. When the outer side surface of the dummy piezoelectric element is cut, a shift of a cutting line from a correct cutting line, which is due to high hardness of the internal electrodes, is minimized.

Abstract: A pressurizing chamber 1 is formed as a recess by half etching of a silicon single-crystal substrate 2. A nozzle communicating hole 6 through which the pressurizing chamber 1 is connected to a nozzle opening 5 is formed as a through hole which is smaller in width than the pressurizing chamber 1. The pressurizing chamber 1 is connected to the nozzle opening 5 in the other face via the nozzle communicating hole 6 while reducing the volume of the pressurizing chamber 1 to a degree as small as possible. The silicon single-crystal substrate is used as a member constituting a spacer so that an ink drop of a reduced ink amount suitable for high density printing flies with high positioning accuracy.

Abstract: A liquid jetting head of the invention includes a flowing-path plate through which a flowing-path space is formed as a flowing-path for a liquid. A nozzle plate is provided on one side surface of the flowing-path plate, said nozzle plate having a nozzle that is communicated with the flowing-path space. A sealing plate is provided on the other side surface of the flowing-path plate for sealing the flowing-path space. A portion of the other side of the flowing-path space forms a pressure-chamber space. A portion of the other side of the flowing-path plate including at least a portion of the pressure-chamber space is formed by electrocasting. A pressure-generating unit is provided at a portion of the other side of the sealing plate corresponding to the pressure-chamber space for changing a pressure of the liquid in the pressure-chamber space.

Abstract: An ink jet head 22 of linear form which consists of a plurality of nozzles 27 arranged as a nozzle row 28 is provided in an ink jet device for manufacture of a color filter. Filter element material 13 from the nozzles 27 which differ from the motherboard 12 is discharged four superimposed times by the plurality of nozzles 27, and is formed to a predetermined film thickness upon a single filter element 3. It is possible to prevent the occurrence of undesirable deviations in film thickness between different ones of the filter elements 3, so that it is possible to flatten and make even the optical transparency characteristic of the resulting color filter 1.

Abstract: In a vibrator unit, at least one piezoelectric vibrator is fixed on a base member in a cantilevered manner, such that a first region of the piezoelectric vibrator is fixed on a first face of the base member. A resin case is formed with a housing space extending through a first end face to a second end face thereof. The housing space includes a first housing part which opens to the first end face of the case, a second housing part which continues to the first housing part, and a third housing part which continues to the second housing part. In the first housing part, a part of the piezoelectric vibrator except for the first region is housed.

Abstract: Connection electrodes are formed to be located on the same plane as discrete internal electrodes, and to be exposed to the rear face while being insulated from the discrete internal electrodes. With the conductive relationship between the connection electrodes and common electrodes, the resistance of the common internal electrodes is reduced, and the size of the fixed area is also reduced accordingly.

Abstract: A first surface of an elastic plate is bonded onto one surface of a channel forming substrate. A first face of a supporting base formed with a through hole therein is bonded onto a second surface of the elastic plate which is opposite to the first surface. A first face of a resin casing formed with an accommodation space therein is bonded onto a second face of the supporting base which is opposite to the first face of the supporting base. At least one vibrator unit including a fixation base, and piezoelectric vibrators arranged on a first face of the fixation base such that first ends of the piezoelectric vibrators are fixed thereon and opposite free ends overhang a second face of the fixation base.

Abstract: In an ink jet apparatus for manufacturing a color filter 1, ink jet heads 22 having a plurality of nozzle 27 are disposed in a linear manner. Filter element member is ejected to a motherboard 12 from a plurality of nozzles 27 four times so as to form the filter element 3 in a predetermined thickness. By doing this, it is possible to prevent difference in the thickness in a plurality of the filter elements 3 and to equalize light transparency in planar manner. Thus, in an ejecting apparatus, a color filter can be formed in more common way at low cost and more efficiently. Also, it is possible to provide an ejecting apparatus which can equalize factors such as electrooptical characteristics of the electrooptical members, color displaying characteristics by the liquid crystal apparatuses, and illuminating characteristics by an EL surface.

Abstract: A jetting head is provided with a nozzle orifice, a pressure chamber communicated with the nozzle orifice, and a piezoelectric element which is deformable to cause pressure fluctuation to liquid contained in the pressure chamber. A drive signal generator simultaneously generates a plurality of drive signals, each provided with waveform elements including at least one drive pulse in every unit jetting cycle. The drive pulse deforms the piezoelectric element to cause such pressure fluctuation as to eject a liquid droplet from the nozzle orifice. A switcher selectively supplies at least one of the waveform elements included in one of the drive signals to the piezoelectric element. A switch controller controls a selective supply operation of the switcher in accordance with amount data which indicates an amount of the liquid droplet to be ejected. A time period in which the drive pulse is generated in one of the drive signal and that in another one of the drive signals overlap at least partly.

Abstract: A nozzle plate (8) having a nozzle opening (10) formed thereon, a passage forming substrate (70) having a pressure chamber (12), an ink supply port (13) and a common ink chamber (11) formed sequentially to communicate with the nozzle opening (10), and a vibrating plate (9) for being deformed to pressurize the pressure chamber (12) are provided and laminated to constitute a passage unit (30). The passage forming substrate (70) is fabricated by an insert molding using a reinforcing plate (72) as a core and a portion to be an ink passage is partitioned and formed by a resin (71).

Abstract: A dummy piezoelectric element (7) is disposed at least at one of the ends of an array of piezoelectric vibration elements. A region not including internal electrodes is provided in the vicinity of the outer side surface of the dummy piezoelectric vibration element 7 to be formed. When the outer side surface of the dummy piezoelectric element 7 is cut, a shift of a cutting line from a correct cutting line, which is due to high hardness of the internal electrodes, is minimized.

Abstract: The present invention prevents bubbles from remaining in an ink passage and inhibits crosstalk when ink is jetted in an ink-jet print head. Ink-jet nozzles are formed inside a nozzle plate in the front of the ink-jet print head, a plurality of pressure chambers are provided at the rear of the nozzle plate, and an ink reservoir is connected to the pressure chambers. An ink supply passage has an exit which is connected to the ink reservoir. The diameter of the ink supply passage is reduced at the exit connected to the ink reservoir, and the diameter at the exit is smaller than the width and the depth of the ink reservoir. The rear surface of the ink reservoir is covered with a flexible and elastic film, except for a connection between the ink reservoir and the exit of the ink supply passage, at a location remote from a connection between the ink reservoir and each of the pressure chambers. The exit of the ink supply passage absorbs the pressure of an ink jet from each of the pressure chambers.

Abstract: A nozzle plate (8) having a nozzle opening (10) formed thereon, a passage forming substrate (70) having a pressure chamber (12), an ink supply port (13) and a common ink chamber (11) formed sequentially to communicate with the nozzle opening (10), and a vibrating plate (9) for being deformed to pressurize the pressure chamber (12) are provided and laminated to constitute a passage unit (30). The passage forming substrate (70) is fabricated by an insert molding using a reinforcing plate (72) as a core and a portion to be an ink passage is partitioned and formed by a resin (71).

Abstract: An ink jet recording head has an ink passage unit (1) formed by superposing a nozzle plate (3) with a plurality of nozzles (2) and an ink passage plate (8). The ink passage plate (8) has first and a second surface (8a, 8b), and is provided with a plurality of pressure producing chambers (5) connected to the plurality of nozzles (2), and an ink reservoir (7) communicating with the pressure producing chambers (5) by means of ink inlet ports (6). A cover plate (11) is closely joined to the first surface (8a) of the ink passage plate (8). The cover plate (11) is deformed elastically by piezoelectric vibrators (10) so as to apply pressure to the ink contained in the pressure producing chambers (5). The ink passage plate (8) is a metal sheet (21) having first and second surfaces (8a, 8b) of the ink passage plate (8). A through hole (20) for the ink reservoir (7) is formed from the first surface to the second surface in the metal sheet (21).

Abstract: A first surface of an elastic plate is bonded onto one surface of a channel forming substrate. A first face of a supporting base formed with a through hole therein is bonded onto a second surface of the elastic plate which is opposite to the first surface. A first face of a resin casing formed with an accommodation space therein is bonded onto a second face of the supporting base which is opposite to the first face of the supporting base. At least one vibrator unit including a fixation base, and piezoelectric vibrators arranged on a first face of the fixation base such that first ends of the piezoelectric vibrators are fixed thereon and opposite free ends overhang a second face of the fixation base.

Abstract: An ink jet recording head has an ink passage unit (1) formed by superposing a nozzle plate (3) with a plurality of nozzles (2) and an ink passage plate (8). The ink passage plate (8) has first and a second surface (8a, 8b), and is provided with a plurality of pressure producing chambers (5) connected to the plurality of nozzles (2), and an ink reservoir (7) communicating with the pressure producing chambers (5) by means of ink inlet ports (6). A cover plate (11) is closely joined to the first surface (8a) of the ink passage plate (8). The coverplate (11) is deformed elastically by piezoelectric vibrators (10) so as to apply pressure to the ink contained in the pressure producing chambers (5). The ink passage plate (8) is a metal sheet (21) having first and second surfaces (8a, 8b) of the ink passage plate (8). A through hole (20) for the ink reservoir (7) is formed from the first surface to the second surface in the metal sheet (21).

Abstract: Connection electrodes are formed to be located on the same plane as discrete internal electrodes, and to be exposed to the rear face while being insulated from the discrete internal electrodes. With the conductive relationship between the connection electrodes and common electrodes, the resistance of the common internal electrodes is reduced, and the size of the fixed area is also reduced accordingly.

Abstract: Connection electrodes are formed to be located on the same plane as discrete internal electrodes, and to be exposed to the rear face while being insulated from the discrete internal electrodes. With the conductive relationship between the connection electrodes and common electrodes, the resistance of the common internal electrodes is reduced, and the size of the fixed area is also reduced accordingly.