Abstract: There are provided a method of manufacturing a head chip capable of suppressing the occurrence of the failure in the process of forming the actuator plate to thereby increase the yield ratio, and a method of manufacturing a liquid jet head using the above method of manufacturing a head chip. The method of manufacturing a head chip according to an embodiment of the present disclosure is a method of manufacturing a head chip having an actuator plate adapted to apply pressure to liquid so as to jet the liquid.

Abstract: There are provided a method of manufacturing a head chip capable of suppressing the occurrence of the failure in the process of forming the actuator plate to thereby increase the yield ratio, and a method of manufacturing a liquid jet head using the above method of manufacturing a head chip. The method of manufacturing a head chip according to an embodiment of the present disclosure is a method of manufacturing a head chip having an actuator plate adapted to apply pressure to liquid so as to jet the liquid.

Abstract: According to an embodiment, an ink jet head includes a pair of actuator plates, a return plate, and a flow passage plate. The pair of actuator plates are disposed to face each other in a Y-direction. In the actuator plate, a plurality of channels which extend in a Z-direction are arranged at a distance in an X-direction. The return plate is disposed on an opening end side of the channels in the pair of actuator plates. A circulation passage which communicates with the channels is formed in the return plate. The flow passage plate is disposed between the pair of actuator plates. An inlet flow passage into which an ink flows and an outlet flow passage which communicates with the circulation passage are arranged in the Z-direction.

Abstract: There are provided a head chip, a liquid jet head, and a liquid jet recording device capable of enhancing the reliability. The head chip according to an embodiment of the disclosure includes a first plate having a plurality of pressure chambers adapted to apply pressure to a liquid, a second plate having a plurality of nozzle holes adapted to jet the liquid in response to application of the pressure, and a third plate disposed between the first and second plates, and provided with a plurality of through holes individually communicated with the plurality of pressure chambers and the plurality of nozzle holes, respectively. In the through hole, a second opening region opposed to the second plate is larger than a first opening region opposed to the first plate.

Abstract: There are provided a liquid jet head and a liquid jet recording device each capable of appropriately cutting off the liquid column formed immediately after being jetted from the jet hole to prevent the satellite droplet from generating, and further achieving easier maintenance of the jet hole part. The liquid jet head includes a drive actuator, a jet hole plate, and a flow channel operating actuator. The drive actuator applies a pressure variation to a liquid filled therein. The jet hole plate is disposed on a downstream side of the drive actuator and adapted to jet the liquid having flown out from the drive actuator from the jet hole to the outside of the drive actuator.

Abstract: There are provided a head chip, a liquid jet head, and a liquid jet recording device capable of enhancing the reliability. The head chip according to an embodiment of the disclosure includes a first plate having a plurality of pressure chambers adapted to apply pressure to a liquid, a second plate having a plurality of nozzle holes adapted to jet the liquid in response to application of the pressure, and a third plate disposed between the first and second plates, and provided with a plurality of through holes individually communicated with the plurality of pressure chambers and the plurality of nozzle holes, respectively. In the through hole, a second opening region opposed to the second plate is larger than a first opening region opposed to the first plate.

Abstract: A liquid ejection head includes: actuator plates having discharge channels to be filled with an ink; sub-plates stacked on the ?Z-direction end surfaces of discharge channels in the actuator plates along a flow direction of the ink and having communication paths communicating with the discharge channels; and a nozzle plate stacked on the ?Z-direction end surfaces of the communication paths in the sub-plates along the flow direction and having nozzle holes communicating with the discharge channels through the communication paths. The ?Z-direction end surfaces of the sub-plates are polished.

Abstract: The present invention relates to a nozzle plate having small-diameter nozzle holes and large-diameter nozzle holes that are larger in diameter than the small-diameter nozzle holes and communicate with the small-diameter nozzle holes on the downstream side along the direction of ink flow.

Abstract: According to an embodiment, a member is formed by being cut from a parent material, and has a cut surface. The member includes a base material and a filler. The base material is included in the parent material. The filler is buried in a space provided in the parent material and has cuttability which is better than that of the base material. The base material and the filler are exposed to the cut surface together.

Abstract: According to an embodiment, an ink jet head includes a pair of actuator plates, a return plate, and a flow passage plate. The pair of actuator plates are disposed to face each other in a Y-direction. In the actuator plate, a plurality of channels which extend in a Z-direction are arranged at a distance in an X-direction. The return plate is disposed on an opening end side of the channels in the pair of actuator plates. A circulation passage which communicates with the channels is formed in the return plate. The flow passage plate is disposed between the pair of actuator plates. An inlet flow passage into which an ink flows and an outlet flow passage which communicates with the circulation passage are arranged in the Z-direction.

Abstract: There are provided a liquid jet head and a liquid jet recording device each capable of further reducing the accumulation of the foreign matters or the bubbles in the periphery of the jet hole to thereby stably jet the liquid from the jet hole. The liquid jet head is provided with a pressure variation chamber, a return channel, a circulation channel, and a jet hole. The pressure variation chamber applies a pressure variation to a liquid filled therein. The return channel is communicated with an outflow part of the pressure variation chamber on an upstream side thereof, and extends in a direction crossing an outflow direction of the liquid from the outflow part. The circulation channel is communicated with a downstream side of the return channel, and extends in a direction crossing the return channel, so as to return the liquid to an upstream side of the pressure variation chamber. The jet hole jets the liquid outside, the liquid flowing out from the pressure variation chamber.

Abstract: There are provided a liquid jet head and a liquid jet recording device each capable of appropriately cutting off the liquid column formed immediately after being jetted from the jet hole to prevent the satellite droplet from generating, and further achieving easier maintenance of the jet hole part. The liquid jet head includes a drive actuator, a jet hole plate, and a flow channel operating actuator. The drive actuator applies a pressure variation to a liquid filled therein. The jet hole plate is disposed on a downstream side of the drive actuator and adapted to jet the liquid having flown out from the drive actuator from the jet hole to the outside of the drive actuator.

Abstract: A method for manufacturing a nozzle plate is a method for manufacturing a nozzle plate with nozzle holes for ejecting an ink. The method includes: a hole making process for making a plurality of holes to be the nozzle holes in a base material for the nozzle plate; and a repair process for repairing a defective hole, out of the plurality of holes, in which a hole diameter of a portion to be a downstream opening along a direction of ink flow is smaller than a desired hole diameter. In the repair process, the defective hole is processed to have a hole with a repaired hole diameter of the portion to be the downstream opening smaller than the desired hole diameter and larger than the hole diameter of the defective hole.

Abstract: A plate body includes: a nozzle plate that is provided on an actuator plate having a plurality of channels to be filled with a liquid and has a nozzle array composed of a plurality of nozzle holes communicating separately with the plurality of channels; and a nozzle cover plate that is provided on a discharge surface of the nozzle plate from which the liquid is discharged and has an opening communicating with at least one of the nozzle holes. The opening is formed such that a direction crossing a direction of the nozzle array and a direction orthogonal to the direction of the nozzle array constitutes a longitudinal direction of the opening.

Abstract: The present invention relates to a nozzle plate having small-diameter nozzle holes and large-diameter nozzle holes that are larger in diameter than the small-diameter nozzle holes and communicate with the small-diameter nozzle holes on the downstream side along the direction of ink flow.

Abstract: A liquid ejection head includes: actuator plates having discharge channels to be filled with an ink; sub-plates stacked on the ?Z-direction end surfaces of discharge channels in the actuator plates along a flow direction of the ink and having communication paths communicating with the discharge channels; and a nozzle plate stacked on the ?Z-direction end surfaces of the communication paths in the sub-plates along the flow direction and having nozzle holes communicating with the discharge channels through the communication paths. The ?Z-direction end surfaces of the sub-plates are polished.

Abstract: A liquid jet head includes an actuator plate having opposite surfaces with ejection grooves arranged on one surface and a return path arranged on the other surface. A spacer plate has one surface on which the actuator plate is positioned and has a side flow path communicating with the ejection grooves. An air bubble retention suppression unit is provided on the spacer plate and suppresses retention of air bubbles in the side flow path.

Abstract: A liquid ejection head includes: a piezoelectric actuator configured to be deformed depending on a driving pulse applied thereto so as to eject liquid filled in a pressure chamber from a nozzle, a ratio of a first local maximum value which is a largest value among a plurality of local maximum values of an ejection speed of the liquid depending on a pulse width and a second local maximum value which is a second largest value thereamong satisfying a predetermined condition; and a control unit configured to successively apply a first driving pulse and a second driving pulse to the piezoelectric actuator.

Abstract: A liquid ejection head includes: a piezoelectric actuator configured to be deformed depending on a driving pulse applied thereto so as to eject liquid filled in a pressure chamber from a nozzle, a ratio of a first local maximum value which is a largest value among a plurality of local maximum values of an ejection speed of the liquid depending on a pulse width and a second local maximum value which is a second largest value thereamong satisfying a predetermined condition; and a control unit configured to successively apply a first driving pulse and a second driving pulse to the piezoelectric actuator.

Abstract: A maintenance method of a liquid ejection printing device includes: forming a lump of trapped liquid in a nozzle plate to cover a nozzle hole and a surrounding of the nozzle hole with ink while a printing operation on a printing medium is performed and the liquid is not ejected; and suctioning the lump of trapped liquid into an ejection channel after the forming of the lump of trapped liquid.