Abstract: Disclosed is a method of manufacturing, a metal nozzle plate, in which is formed a nozzle for discharging a liquid and that is to be bonded with adhesive to a head chip provided with an actuator for discharging the liquid, the method including: forming the nozzle in a metal plate-like member; forming a groove in the metal plate-like member; and performing exterior processing with respect to the nozzle plate.

Abstract: Disclosed is a method of manufacturing, a metal nozzle plate, in which is formed a nozzle for discharging a liquid and that is to be bonded with adhesive to a head chip provided with an actuator for discharging the liquid, the method including: forming the nozzle in a metal plate-like member; forming a groove in the metal plate-like member; and performing exterior processing with respect to the nozzle plate.

Abstract: An inkjet recording device for ejecting ink onto a recording medium to form an image on the recording medium while a recording head is moved with relative movement to the recording medium in a direction along an upper surface of the recording medium, including: a recording head for ejecting ink onto a recording medium; a heating device for heating the recording medium; a conveyance device for conveying the recording medium having been heated by the heating device to under the recording head; and a cooling device which is provided in a state of insulation from the recording head, and has a cooling surface which is cooled to a temperature lower than a temperature of a nozzle surface of the recording head, wherein the cooling surface and the nozzle surface of the recording head are disposed along a direction of the relative movement and to face the recording medium.

Abstract: A KNbO3—NaNbO3 piezoelectric porcelain composition which exhibits a larger piezoelectric constant than those of conventional ones and does not have any secondary phase transition point in the neighborhood of room temperature (10 to 40° C.), that is, a piezoelectric porcelain composition represented by the general formula: (1-y-z-w)(KxNa1-x)NbO3+yLiNbO3+zSrTiO3+wBiFeO3, wherein (KxNa1-x)NbO3 represents potassium sodium niobate; LiNbO3 represents lithium niobate; SrTiO3 represents strontium titanate; and BiFeO3 represents bismuth ferrate; with the proviso that 0.4<x<0.6, 0<y?0.1, 0<z<0.1, 0<w<0.09, and 0.03<y+z+w?0.12.

Abstract: A droplet ejection head provided with a piezoelectric actuator made by using a KNbO3—NaNbO3 piezoelectric porcelain composition which exhibits a larger piezoelectric constant than those of conventional ones and does not have any secondary phase transition point in the neighborhood of room temperature (from 10 to 40° C.) and which is suitable for use in the piezoelectric actuator of a droplet ejection head, that is, a droplet ejection head characterized by being provided with a piezoelectric actuator made by using a piezoelectric porcelain composition represented by the general formula: (1?y?z?w)(KxNa1-x)NbO3+yLiNbO3+zSrTiO3+wBiFeO3, wherein (KxNa1-x)NbO3 represents potassium sodium niobate; LiNbO3 represents lithium niobate; SrTiO3 represents strontium titanate; and BiFeO3 represents bismuth ferrate; with the proviso that 0.4<x<0.6, 0<y?0.1, 0<z<0.1, 0<w<0.09, and 0.03<y+z+w?0.12.

Abstract: An inkjet recording device for ejecting ink onto a recording medium to form an image on the recording medium while a recording head is moved with relative movement to the recordin medium in a direction along an upper surface of the recordin medium including: a recording head for ejecting ink onto a recording medium; a heating device for heating the recording medium; a conveyance device for conveying the recording medium having been heated by the heating device to under the recording head; and a cooling device which is provided in a state of insulation from the recording head, and has a cooling surface which is cooled to a temperature lower than a temperature of a nozzle surface of the recording head, wherein the cooling surface and the nozzle surface of the recording head are disposed along a direction of the relative movement and to face the recording medium.

Abstract: Disclosed is a piezoelectric ceramic composition which is produced by adding two or more metal elements and has excellent piezoelectric properties. The piezoelectric composition comprises the main ingredient represented by the general formula: [Lix(K1-yNay)1-x](Nb1-z-wTaZSbw)O3 (0?x?0.2, 0?y?1, 0?z?0.4, 0<w?0.2) and the auxiliary ingredient represented by the general formula: ABO3 (wherein A and B independently represent a metal element having a valence of +3 or together represent a combination of at least two metal elements each having a valence of +3 in average; and ABO3 represents a compound having a perovskite structure).

Abstract: An inkjet recording apparatus has a head which includes, a plurality of nozzles each of which jets ink containing spacer beads dispersed therein on a substrate; a plurality of pressure chambers each of which communicates with each of the nozzles; and an plurality of electromechanical transducers which change a capacity of each of the pressure chambers by applying a voltage pulse, wherein the ink is jetted from each of the nozzles by applying to each of the electromechanical transducers the voltage pulse which includes a first pulse for increasing the capacity of the pressure chamber and then decreasing the capacity after a lapse of a predetermined time, wherein, when a half of an acoustic resonance period of a pressure wave in the pressure chambers is assumed as AL, a width of the first pulse is twice of the AL or more.

Abstract: This invention provides a shear mode-type piezoelectric actuator using a piezoelectric ceramic composition free from lead having a high coercive electric field and a liquid ejection head having the shear mode-type piezoelectric actuator. The shear mode-type piezoelectric actuator is characterized by using a piezoelectric ceramic composition having a solid solution including a main component of general formula (1) and an auxiliary component of general formula (2) added in an amount of less than 1% by mole based on the total amount of the solid solution: {LiX(K1-YNaY)1-X}(Nb1-Z-WTaZSbW)O3??General formula (1) (Wherein 0?x?0.2, 0?y?1, 0<z?0.4, 0<w?0.2) ABO3??General formula (2) (Wherein A denotes Bi and B denotes at least one of Fe, In and Sc).

Abstract: Disclose is a liquid droplet ejection head comprising; a piezoelectric actuator using a piezoelectric porcelain composition containing no lead and having low temperature dependence of piezoelectric constant, Specifically disclosed is a droplet ejection head characterized by comprising a piezoelectric actuator using a piezoelectric porcelain composition containing a solid solution of a main component represent by the Formula (1) below and a sub-component represented by the Formula (2) below which is added in an amount of less than 1 mol % relative to the total amount of the solid solution. {LiX(K1-YNaY)1-X}(Nb1-Z-WTaZSbW)O3,??Formula (1) wherein x, y, z and W are within the ranges of 0?x?0.2, 0?y?1, 0<z?0.4, and 0<w?0.2, respectively. ABO3,??Formula (2) wherein A represents Bi, and B represents at least any one of Fe, In, and Sc.

Abstract: A KNbO3—NaNbO3 piezoelectric porcelain composition which exhibits a larger piezoelectric constant than those of conventional ones and does not have any secondary phase transition point in the neighborhood of room temperature (10 to 40° C.), that is, a piezoelectric porcelain composition represented by the general formula: (1-y-z-w)(KxNa1-x)NbO3+yLiNbO3+zSrTiO3+wBiFeO3, wherein (KxNa1-x)NbO3 represents potassium sodium niobate; LiNbO3 represents lithium niobate; SrTiO3 represents strontium titanate; and BiFeO3 represents bismuth ferrate; with the proviso that 0.4<x<0.6, 0<y?0.1, 0<z<0.1, 0<w<0.09, and 0.03<y+z+w?0.12.

Abstract: A droplet ejection head provided with a piezoelectric actuator made by using a KNbO3—NaNbO3 piezoelectric porcelain composition which exhibits a larger piezoelectric constant than those of conventional ones and does not have any secondary phase transition point in the neighborhood of room temperature (from 10 to 40° C.) and which is suitable for use in the piezoelectric actuator of a droplet ejection head, that is, a droplet ejection head characterized by being provided with a piezoelectric actuator made by using a piezoelectric porcelain composition represented by the general formula: (1?y?z?w)(KxNa1?x)NbO3+yLiNbO3+zSrTiO3+wBiFeO3, wherein (KxNa1?x)NbO3 represents potassium sodium niobate; LiNbO3 represents lithium niobate; SrTiO3 represents strontium titanate; and BiFeO3 represents bismuth ferrate; with the proviso that 0.4<x<0.6, 0<y?0.1, 0<z<0.1, 0<w<0.09, and 0.03<y+z+w?0.12.

Abstract: This invention provides a shear mode-type piezoelectric actuator using a piezoelectric ceramic composition free from lead having a high coercive electric field and a liquid ejection head having the shear mode-type piezoelectric actuator. The shear mode-type piezoelectric actuator is characterized by using a piezoelectric ceramic composition having a solid solution including a main component of general formula (1) and an auxiliary component of general formula (2) added in an amount of less than 1% by mole based on the total amount of the solid solution: {LiX(K1-YNaY)1-X} (Nb1-Z-WTaZSbW)O3 ??General Formula (1) (Wherein 0?x?0.2, 0?y?1, 0<z?0.4, 0<w?0.2) ABO3 ??General Formula (2) (Wherein A denotes Bi and B denotes at least one of Fe, In and Sc).

Abstract: Disclose is a liquid droplet ejection head comprising; a piezoelectric actuator using a piezoelectric porcelain composition containing no lead and having low temperature dependence of piezoelectric constant, specifically disclosed is a droplet ejection head characterized by comprising a piezoelectric actuator using a piezoelectric porcelain composition containing a solid solution of a main component represent by the Formula (1) below and a sub-component represented by the Formula (2) below which is added in an amount of less than 1 mol % relative to the total amount of the solid solution. {LiX(K1-YNaY)1-X}(Nb1-Z-WTaZSbW)O3,??Formula (1) wherein x, y, z and W are within the ranges of 0?x?0.2, 0?y?1, 0<z?0.4, and 0<w?0.2, respectively. ABO3,??Formula (2) wherein A represents Bi, and B represents at least any one of Fe, In, and Sc.

Abstract: An inkjet recording apparatus has a head which includes, a plurality of nozzles each of which jets ink containing spacer beads dispersed therein on a substrate; a plurality of pressure chambers each of which communicates with each of the nozzles; and an plurality of electromechanical transducers which change a capacity of each of the pressure chambers by applying a voltage pulse, wherein the ink is jetted from each of the nozzles by applying to each of the electromechanical transducers the voltage pulse which includes a first pulse for increasing the capacity of the pressure chamber and then decreasing the capacity after a lapse of a predetermined time, wherein, when a half of an acoustic resonance period of a pressure wave in the pressure chambers is assumed as AL, a width of the first pulse is twice of the AL or more.

Abstract: Disclosed is a piezoelectric ceramic composition which is produced by adding two or more metal elements and has excellent piezoelectric properties. The piezoelectric composition comprises the main ingredient represented by the general formula: [Lix(K1-yNay)1-x](Nb1-z-wTaZSbw)O3 (0?x?0.2, 0?y?1, 0?z?0.4, 0<w?0.2) and the auxiliary ingredient represented by the general formula: ABO3 (wherein A and B independently represent a metal element having a valence of +3 or together represent a combination of at least two metal elements each having a valence of +3 in average; and ABO3 represents a compound having a perovskite structure).

Abstract: The present liquid ejecting device adjusts the cross-talk amount to a range of ± 15 %, by providing: a recording head having actuators which generate the ejection energy for ejecting the liquid from a plurality of nozzles for each of the plurality of nozzles; a drive circuit to generate the drive signal for driving the actuator; and an adjusting circuit for adjusting at least one of the rising time constant and the falling time constant of the waveform of the drive signal to a time period more than 30 nsec and less than 150 nsec before the drive signal reaches the actuator.

Abstract: A liquid jetting device having: a recording head including a jetting energy generating element; a drive circuit generating drive signal for the element; a liquid detection sensor detecting a jetting characteristic value of liquid jetted from a nozzle; a drive voltage adjustment unit adjusting a voltage value of the drive signal; and a controller to control the drive circuit, the sensor and the drive voltage adjustment unit, wherein the controller performs control so that the liquid is jetted, and creates a correction data from the jetting characteristic value; and the controller performs control so that the voltage value is corrected based on a value obtained by multiplying the correction data by convergence coefficient within a range from 0.50 or more to less than 1.00, and repeats correcting the voltage value until a detection result of the liquid jetted based on the drive signal after the correction becomes a target value.

Abstract: The present liquid ejecting device adjusts the cross-talk amount to a range of ±15%, by providing: a recording head having actuators which generate the ejection energy for ejecting the liquid from a plurality of nozzles for each of the plurality of nozzles; a drive circuit to generate the drive signal for driving the actuator; and an adjusting circuit for adjusting at least one of the rising time constant and the falling time constant of the waveform of the drive signal to a time period more than 30 nsec and less than 150 nsec before the drive signal reaches the actuator.

Abstract: A liquid jetting device having: a recording head including a jetting energy generating element; a drive circuit generating drive signal for the element; a liquid detection sensor detecting a jetting characteristic value of liquid jetted from a nozzle; a drive voltage adjustment unit adjusting a voltage value of the drive signal; and a controller to control the drive circuit, the sensor and the drive voltage adjustment unit, wherein the controller performs control so that the liquid is jetted, and creates a correction data from the jetting characteristic value; and the controller performs control so that the voltage value is corrected based on a value obtained by multiplying the correction data by convergence coefficient within a range from 0.50 or more to less than 1.00, and repeats correcting the voltage value until a detection result of the liquid jetted based on the drive signal after the correction becomes a target value.