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公开(公告)号：US09796178B2
公开(公告)日：2017-10-24
申请号：US15486602
申请日：2017-04-13
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： David Maxfield
IPC: B41J2/045
CPC classification number: B41J2/04563 , B41J2/04585 , B41J2/04586 , B41J2/14072 , B41J2/14153
Abstract: An example provides a fluid ejection apparatus including a fluid feed slot to supply a fluid to a plurality of drop ejectors, a first rib at a first side of the fluid feed slot and supporting drop ejection circuitry to control ejection of drops of the fluid from the plurality of drop ejectors, and a second rib at a second side, opposite the first side, of the fluid feed slot supporting a thermal sensor to facilitate determination of a temperature of the first rib and the second rib.
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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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公开(公告)号：US10369801B2
公开(公告)日：2019-08-06
申请号：US15522340
申请日：2014-11-25
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Vincent C Korthuis , David Maxfield , Andrew Queisser
IPC: B41J2/175
Abstract: A liquid propelling component includes a liquid channel, a circuit block. The circuit block includes a first conductor disposed in the liquid channel to be in contact with liquid in the channel and a second conductor insulated from liquid in the channel. The liquid propelling component further includes a memory storing a digital code that corresponds to an analog value of the second conductor under a predefined charge.
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公开(公告)号：US10029464B2
公开(公告)日：2018-07-24
申请号：US15706315
申请日：2017-09-15
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Adam L. Ghozeil , David Maxfield , Peter James Fricke
Abstract: An example provides a fluid ejection apparatus including a fluid feed slot along a length of a print head die of the fluid ejection apparatus to supply a fluid to a plurality of drop ejectors, control circuitry adjacent to at least one side of the fluid feed slot to control ejection of drops of fluid from the plurality of drop ejectors, and a single power supply connector at an end of the print head die to supply power to the control circuitry.
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公开(公告)号：US20180162124A1
公开(公告)日：2018-06-14
申请号：US15894034
申请日：2018-02-12
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Andrew L. Van Brocklin , David Maxfield
CPC classification number: B41J2/04541 , B41J2/0451 , B41J2/0458 , B41J2/14153 , B41J2002/14354 , G01R27/02
Abstract: Measuring an inkjet nozzle may include taking at least one impedance measurement after the firing command is sent to detect the presence of a drive bubble and taking another impedance measurement to detect a collapse of the drive bubble.
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Patent Agency Ranking
公开(公告)号：US20180001628A1
公开(公告)日：2018-01-04
申请号：US15705608
申请日：2017-09-15
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： David Maxfield
IPC: B41J2/045
CPC classification number: B41J2/04563 , B41J2/04585 , B41J2/04586 , B41J2/14072 , B41J2/14153
Abstract: An example provides a fluid ejection apparatus including a fluid feed slot to supply a fluid to a plurality of drop ejectors, a first rib at a first side of the fluid feed slot and supporting drop ejection circuitry to control ejection of drops of the fluid from the plurality of drop ejectors, and a second rib at a second side, opposite the first side, of the fluid feed slot supporting a thermal sensor to facilitate determination of a temperature of the first rib and the second rib.
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公开(公告)号：US11065867B2
公开(公告)日：2021-07-20
申请号：US16661103
申请日：2019-10-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Andrew L. Van Brocklin , David Maxfield
Abstract: Measuring an inkjet nozzle may include taking at least one impedance measurement after the firing command is sent to detect the presence of a drive bubble and taking another impedance measurement to detect a collapse of the drive bubble.
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公开(公告)号：US20190235558A1
公开(公告)日：2019-08-01
申请号：US16318201
申请日：2016-10-13
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： James Michael Gardner , Eric Martin , David Maxfield
Abstract: In some examples, a control circuit for a bypass capacitor includes a switch assembly that is activatable between a first state to connect the bypass capacitor between nodes, and a second state to disconnect the bypass capacitor between the nodes. The switch assembly includes a first switch to activate a first path comprising a first resistance to begin charging the bypass capacitor, and a second switch to, a delayed time after the activating of the first path, activate a second path comprising a second resistance lower than the first resistance, the activated second path connecting the bypass capacitor between the nodes.
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公开(公告)号：US10183488B2
公开(公告)日：2019-01-22
申请号：US15547393
申请日：2015-04-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Gerard Alzona , David Maxfield , Dustin W Blair , Sterling Chaffins , Andrew L Van Brocklin
Abstract: In some examples, a printhead includes a firing chamber to receive printer fluid, an ejector positioned in the firing chamber to eject printer fluid droplets from the printhead, and a nozzle in fluid communication with the firing chamber. The printhead can further include an impedance sensor positioned in the firing chamber to contact printer fluid to measure impedance values of the printer fluid. The impedance sensor can be connectable to a controller to transmit impedance values of printer fluid to the controller.
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公开(公告)号：US20180022091A1
公开(公告)日：2018-01-25
申请号：US15547393
申请日：2015-04-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Gerard Alzona , David Maxfield , Dustin W Blair , Sterling Chaffins , Andrew L Van Brocklin
CPC classification number: B41J2/125 , B41J2/0451 , B41J2/04536 , B41J2/04555 , B41J2/0458 , B41J2/04581 , B41J2/11 , B41J2/14153 , B41J2/14201 , B41J29/13 , B41J2002/14354 , G01N27/10
Abstract: In some examples, a printhead includes a firing chamber to receive printer fluid, an ejector positioned in the firing chamber to eject printer fluid droplets from the printhead, and a nozzle in fluid communication with the firing chamber. The printhead can further include an impedance sensor positioned in the firing chamber to contact printer fluid to measure impedance values of the printer fluid. The impedance sensor can be connectable to a controller to transmit impedance values of printer fluid to the controller.
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