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公开(公告)号：US20210283834A1
公开(公告)日：2021-09-16
申请号：US16488715
申请日：2017-11-17
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Andrew Van Brocklin , Kevin P. DeKam , Vladek Kasperchik , Johnathon Holroyd , Douglas Pederson , Sterling Chaffins
IPC: B29C64/165 , B33Y10/00 , B33Y70/00
Abstract: In an example of a method for three-dimensional (3D) printing, a polymeric or polymeric composite build material is applied. A dielectric agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The dielectric agent includes a dielectric material having an effective relative permittivity (εr) value ranging from 1.1 to about 10,000. A fusing agent is selectively applied on the at least the portion of the polymeric or polymeric composite build material, and the polymeric or polymeric composite build material is exposed to radiation to fuse the at least the portion of the polymeric or polymeric composite build material to form a region of a layer of a 3D part. The region exhibits a dielectric property, a piezoelectric property, or a combination thereof.
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公开(公告)号：US11292189B2
公开(公告)日：2022-04-05
申请号：US16488715
申请日：2017-11-17
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Andrew Van Brocklin , Kevin P. DeKam , Vladek Kasperchik , Johnathon Holroyd , Douglas Pederson , Sterling Chaffins
IPC: B29C64/165 , B33Y10/00 , B33Y70/00
Abstract: In an example of a method for three-dimensional (3D) printing, a polymeric or polymeric composite build material is applied. A dielectric agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The dielectric agent includes a dielectric material having an effective relative permittivity (εr) value ranging from 1.1 to about 10,000. A fusing agent is selectively applied on the at least the portion of the polymeric or polymeric composite build material, and the polymeric or polymeric composite build material is exposed to radiation to fuse the at least the portion of the polymeric or polymeric composite build material to form a region of a layer of a 3D part. The region exhibits a dielectric property, a piezoelectric property, or a combination thereof.
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公开(公告)号：US20150054867A1
公开(公告)日：2015-02-26
申请号：US14374781
申请日：2012-04-25
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Andrew Van Brocklin
IPC: B41J2/045
CPC classification number: B41J2/04541 , B41J2/04581
Abstract: An apparatus includes an operational amplifier to drive a print nozzle. A continuous time capacitive network can be employed as feedback by the operational amplifier. A reset control can be provided to adjust startup voltages in the continuous time capacitive network.
Abstract translation: 一种装置包括用于驱动打印喷嘴的运算放大器。 可以使用连续时间电容网络作为运算放大器的反馈。 可以提供复位控制来调节连续时间电容网络中的启动电压。
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Patent Agency Ranking
公开(公告)号：US10336089B2
公开(公告)日：2019-07-02
申请号：US15940954
申请日：2018-03-29
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Adam L. Ghozeil , Scott A. Linn , David Maxfield , Andrew Van Brocklin
Abstract: In an implementation, a printhead includes a nozzle and a fluid channel. A sensor plate is located within the fluid channel. An impedance measurement circuit is coupled to the sensor plate to measure impedance of fluid within the channel during a fluid movement event that moves fluid past the sensor plate.
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公开(公告)号：US20150210071A1
公开(公告)日：2015-07-30
申请号：US14374751
申请日：2012-04-25
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Andrew Van Brocklin
IPC: B41J2/045
CPC classification number: B41J2/04541 , B41J2/0452 , B41J2/04581 , B41J2/04586 , H03K19/018521
Abstract: An apparatus includes an amplifier to provide a waveform to drive a print nozzle. The amplifier also provides a current proportional to a slew rate of the waveform. A pass gate to applies the waveform to the print nozzle in response to a drive signal. A level shifter adjusts the drive signal based on the current.
Abstract translation: 一种装置包括放大器以提供驱动打印喷嘴的波形。 放大器还提供与波形的转换速率成比例的电流。 传递门，用于响应于驱动信号将波形施加到打印喷嘴。 电平移位器根据电流调整驱动信号。
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公开(公告)号：US20180297370A1
公开(公告)日：2018-10-18
申请号：US15940954
申请日：2018-03-29
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Adam L. Ghozeil , Scott A. Linn , David Maxfield , Andrew Van Brocklin
CPC classification number: B41J2/17566 , B41J2/1404 , B41J2002/14354 , B41J2002/17579
Abstract: In an implementation, a printhead includes a nozzle and a fluid channel. A sensor plate is located within the fluid channel. An impedance measurement circuit is coupled to the sensor plate to measure impedance of fluid within the channel during a fluid movement event that moves fluid past the sensor plate.
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公开(公告)号：US09962949B2
公开(公告)日：2018-05-08
申请号：US15113384
申请日：2014-01-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Adam L. Ghozeil , Scott A. Linn , David Maxfield , Andrew Van Brocklin
CPC classification number: B41J2/17566 , B41J2/1404 , B41J2002/14354 , B41J2002/17579
Abstract: In an implementation, a printhead includes a nozzle and a fluid channel. A sensor plate is located within the fluid channel. An impedance measurement circuit is coupled to the sensor plate to measure impedance of fluid within the channel during a fluid movement event that moves fluid past the sensor plate.
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公开(公告)号：US20170028738A1
公开(公告)日：2017-02-02
申请号：US15113384
申请日：2014-01-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Adam L. Ghozeil , Scott A. Linn , David Maxfield , Andrew Van Brocklin
IPC: B41J2/175
CPC classification number: B41J2/17566 , B41J2/1404 , B41J2002/14354 , B41J2002/17579
Abstract: In an implementation, a printhead includes a nozzle and a fluid channel. A sensor plate is located within the fluid channel. An impedance measurement circuit is coupled to the sensor plate to measure impedance of fluid within the channel during a fluid movement event that moves fluid past the sensor plate.
Abstract translation: 在一个实施方案中，打印头包括喷嘴和流体通道。 传感器板位于流体通道内。 阻抗测量电路耦合到传感器板，以在流体移动事件期间测量流体在通道内的阻抗，从而使流体流过传感器板。
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