公开(公告)号：US20220288925A1

公开(公告)日：2022-09-15

申请号：US17196671

申请日：2021-03-09

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/045 ,  B41J2/21

摘要： Printheads and methods of operation. In one embodiment, a printhead includes a plurality of jetting channels comprising first jetting channels configured to jet a first print fluid and second jetting channels configured to jet a second print fluid, and a driver circuit communicatively coupled to actuators of the jetting channels. The driver circuit receives a drive waveform comprising first jetting pulses provisioned for the first print fluid and second jetting pulses provisioned for the second print fluid, and gating signals comprising a first active gating signal designated for jetting the first print fluid and a second active gating signal designated for jetting the second print fluid. The driver circuit selectively applies the first jetting pulses to actuators of the first jetting channels based on the first active gating signal, and selectively applies the second jetting pulses to actuators of the second jetting channels based on the second active gating signal.

公开(公告)号：US11034149B2

公开(公告)日：2021-06-15

申请号：US16351115

申请日：2019-03-12

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/14 ,  B41J2/18

摘要： Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of flow-through jetting channels each configured to jet a print fluid out of a nozzle. The printhead further includes a supply manifold fluidly coupled to the flow-through jetting channels, a return manifold fluidly coupled to the flow-through jetting channels, and one or more bypass manifolds fluidly coupled between the supply manifold and the return manifold.

公开(公告)号：US11007781B2

公开(公告)日：2021-05-18

申请号：US16796477

申请日：2020-02-20

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/14 ,  B41J2/21

摘要： Printheads for a jetting apparatus. In one embodiment, a printhead includes inlet ports each configured to receive one of eight or more types of print fluids, and a plurality of nozzles arranged in one or two nozzle rows. Each of the nozzles is fluidly coupled to one of the inlet ports. In groupings of eight or more adjacent nozzles of the plurality, the adjacent nozzles are each configured to jet a different one of the types of print fluids.

公开(公告)号：US11214067B2

公开(公告)日：2022-01-04

申请号：US16796526

申请日：2020-02-20

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/165

摘要： A service media and method for cleaning printheads. In one embodiment, a method of cleaning includes inserting a service media beneath one or more printheads, inflating the service media so that an absorbent material of the service media contacts a nozzle surface of the printheads, and deflating the service media.

公开(公告)号：US20210260873A1

公开(公告)日：2021-08-26

申请号：US17316098

申请日：2021-05-10

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/14

摘要： Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of flow-through jetting channels each configured to jet a print fluid out of a nozzle. The printhead further includes a supply manifold fluidly coupled to the flow-through jetting channels, a return manifold fluidly coupled to the flow-through jetting channels, and one or more bypass manifolds fluidly coupled between the supply manifold and the return manifold.

公开(公告)号：US20210197571A1

公开(公告)日：2021-07-01

申请号：US17204046

申请日：2021-03-17

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/175 ,  B41J2/18 ,  B41J2/155 ,  B41J29/02

摘要： Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of jetting channels having nozzles on a bottom surface configured to jet a print fluid, and longitudinal sides disposed between the bottom surface and a top surface. The printhead also comprises Input/Output (I/O) ports disposed on one or more of the longitudinal sides, and configured to convey the print fluid into or out of the printhead. The printhead further includes one or more chain manifolds disposed between the I/O ports.

公开(公告)号：US11571892B2

公开(公告)日：2023-02-07

申请号：US17194869

申请日：2021-03-08

申请人： Hiroshi Nishimura ,  Giang Vo ,  Cesar Hurtado

发明人： Hiroshi Nishimura ,  Giang Vo ,  Cesar Hurtado

IPC分类号： B41J2/14

摘要： Printheads and manifolds within printheads. In one embodiment, a method comprises determining a resonant frequency of jetting channels for a printhead, and selecting a target length for a manifold fluidly coupled to the jetting channels such that resonant frequencies of the manifold differ from the resonant frequency of the jetting channels by a threshold amount.

公开(公告)号：US20210260877A1

公开(公告)日：2021-08-26

申请号：US16796526

申请日：2020-02-20

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/165

摘要： A service media and method for cleaning printheads. In one embodiment, a method of cleaning includes inserting a service media beneath one or more printheads, inflating the service media so that an absorbent material of the service media contacts a nozzle surface of the printheads, and deflating the service media.

公开(公告)号：US10889109B2

公开(公告)日：2021-01-12

申请号：US16670491

申请日：2019-10-31

申请人： Hiroshi Nishimura ,  Shogo Nobumori

发明人： Hiroshi Nishimura ,  Shogo Nobumori

IPC分类号： B41J2/045 ,  G01K7/34 ,  H01L41/04 ,  B41J2/14

摘要： Devices and method for performing temperature measurements in a printhead. In one embodiment, a printhead includes at least one row of jetting channels configured to jet droplets of a print fluid using piezoelectric actuators. A drive circuit includes an input voltage generator that applies a step voltage to a piezoelectric actuator of a jetting channel, and an output voltage detector that detects an output voltage across the piezoelectric actuator over time in response to the step voltage. The drive circuit also includes a temperature detector that determines a voltage response to the step voltage at the piezoelectric actuator based on the output voltage over time, and determines a temperature measurement for the piezoelectric actuator based on the voltage response of the piezoelectric actuator.

公开(公告)号：US20220288922A1

公开(公告)日：2022-09-15

申请号：US17196680

申请日：2021-03-09

申请人： Hiroshi Nishimura

发明人： Hiroshi Nishimura

IPC分类号： B41J2/045 ,  B41J2/14 ,  B41J2/21

摘要： Printheads and methods of operation. In one embodiment, a printhead includes a plurality of jetting channels comprising first jetting channels configured to jet a first print fluid and second jetting channels configured to jet a second print fluid, and a driver circuit communicatively coupled to actuators of the jetting channels. The driver circuit receives a drive waveform comprising non-jetting pulses and jetting pulses, and gating signals comprising a first active gating signal designated for jetting the first print fluid, and a second active gating signal designated for jetting the second print fluid. The driver circuit selectively applies the non-jetting pulses and the jetting pulses to actuators of the first jetting channels based on the first active gating signal to jet the first print fluid, and selectively applies the jetting pulses to actuators of the second jetting channels based on the second active gating signal to jet the second print fluid.