公开(公告)号：US20180086063A1

公开(公告)日：2018-03-29

申请号：US15702236

申请日：2017-09-12

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/1433 ,  B41J2/14201 ,  B41J2/14209 ,  B41J2/1607 ,  B41J2/1609 ,  B41J2/162 ,  B41J2/1623 ,  B41J2/1632 ,  B41J2/1635

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.

公开(公告)号：US20180086066A1

公开(公告)日：2018-03-29

申请号：US15704786

申请日：2017-09-14

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/14

CPC classification number: B41J2/1433 ,  B41J2/14209 ,  B41J2002/14362

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.

公开(公告)号：US20170274645A1

公开(公告)日：2017-09-28

申请号：US15463467

申请日：2017-03-20

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/045

CPC classification number: B41J2/04541 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04595 ,  B41J2202/10

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.

公开(公告)号：US20180222196A1

公开(公告)日：2018-08-09

申请号：US15883812

申请日：2018-01-30

Applicant: SII Printek Inc.

Inventor： Yuzuru KUBOTA ,  Daichi NISHIKAWA ,  Daiki IROKAWA ,  Eriko MAEDA ,  Yutaka HONGO

IPC: B41J2/14

CPC classification number: B41J2/14209 ,  B41J2/1433 ,  B41J2/1609 ,  B41J2/1623 ,  B41J2/1626 ,  B41J2/1631 ,  B41J2/1632 ,  B41J2/1643 ,  B41J2002/14362 ,  B41J2002/14419 ,  B41J2002/14491 ,  B41J2202/12

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.

公开(公告)号：US20180178515A1

公开(公告)日：2018-06-28

申请号：US15855138

申请日：2017-12-27

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/14

CPC classification number: B41J2/14201 ,  B41J2/04516 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/14209 ,  B41J2002/14338 ,  B41J2202/05

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. The flow channel operating actuator is disposed between the drive actuator and the jet hole plate, provided with a communication section adapted to communicate the drive actuator and the jet hole with each other, and has a configuration capable of performing a displacing operation on at least a part of the peripheral edge part of the communication section.

公开(公告)号：US20170266976A1

公开(公告)日：2017-09-21

申请号：US15460766

申请日：2017-03-16

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/165

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.

公开(公告)号：US20190061350A1

公开(公告)日：2019-02-28

申请号：US16117607

申请日：2018-08-30

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/14 ,  B41J2/16

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.

公开(公告)号：US20180178514A1

公开(公告)日：2018-06-28

申请号：US15855115

申请日：2017-12-27

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/14

CPC classification number: B41J2/1433 ,  B41J2/14209 ,  B41J2202/12

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. The jet hole is disposed in an area of the return channel except an upstream side connection area connected to the outflow part of the pressure variation chamber and a downstream side connection area connected to the circulation channel.

公开(公告)号：US20180222209A1

公开(公告)日：2018-08-09

申请号：US15883859

申请日：2018-01-30

Applicant: SII Printek Inc.

Inventor： Yuzuru KUBOTA ,  Daiki IROKAWA ,  Eriko MAEDA

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/16

CPC classification number: B41J2/18 ,  B41J2/14201 ,  B41J2/14209 ,  B41J2/1433 ,  B41J2/1607 ,  B41J2/1609 ,  B41J2/1623 ,  B41J2/1626 ,  B41J2/1631 ,  B41J2/1632 ,  B41J2/1635 ,  B41J2/1642 ,  B41J2/1643 ,  B41J2/17509 ,  B41J2002/14419 ,  B41J2002/14491 ,  B41J2202/12

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.

公开(公告)号：US20180086078A1

公开(公告)日：2018-03-29

申请号：US15702272

申请日：2017-09-12

Applicant: SII Printek Inc.

Inventor： Daiki IROKAWA

IPC: B41J2/16 ,  B41J2/14 ,  B23K26/382 ,  B23P6/00

CPC classification number: B41J2/1634 ,  B23K26/066 ,  B23K26/18 ,  B23K26/384 ,  B23K26/389 ,  B23K26/40 ,  B23K26/402 ,  B23K2103/04 ,  B23K2103/42 ,  B23K2103/52 ,  B23K2103/54 ,  B23P6/00 ,  B41J2/14209 ,  B41J2/1433 ,  B41J2/1609 ,  B41J2/162 ,  B41J2/1626 ,  B41J2/1628 ,  B41J2/1629 ,  B41J2/1631

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.