公开(公告)号：US20200079085A1

公开(公告)日：2020-03-12

申请号：US16685818

申请日：2019-11-15

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Paul A. Richards

IPC: B41J2/14 ,  B41J2/175

Abstract: A fluid ejection device includes a fluid slot, a fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the fluid ejection chamber, a fluid circulation channel communicated at one end with the fluid slot and communicated at another end with the fluid ejection chamber, a fluid circulating element within the fluid circulation channel, and a channel wall separating the fluid ejection chamber and the fluid circulation channel. The fluid circulation channel includes a channel loop, and a width of the channel wall is based on a width of the channel loop and a width of the fluid ejection chamber.

公开(公告)号：US20190134987A1

公开(公告)日：2019-05-09

申请号：US16095478

申请日：2016-07-29

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Nicholas McGuinness ,  Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D Torniainen ,  David P Markel

IPC: B41J2/18

Abstract: A fluid ejection device includes a fluid slot, two laterally adjacent fluid ejection chambers each having a drop ejecting element therein, a fluid circulation path communicated with the fluid slot and each of the two laterally adjacent fluid ejection chambers, and a fluid circulating element within the fluid circulation path, with the fluid circulating element laterally adjacent at least one of the two laterally adjacent fluid ejection chambers, and the two laterally adjacent fluid ejection chambers to substantially simultaneously eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.

公开(公告)号：US20190054469A1

公开(公告)日：2019-02-21

申请号：US16079496

申请日：2016-04-28

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Erik D. Torniainen ,  Nick McGuinness ,  David P. Markel ,  Alexander Govyadinov

IPC: B01L3/00 ,  G01N15/02

Abstract: In an example implementation, a method of microfluidic filtering includes activating a first fluid pump within a microfluidic channel to cause a forward flow of fluid through the microfluidic channel and through a filter of a filter loop. The filter loop intersects the microfluidic channel at a loop entry and at a loop exit. The method includes activating a second fluid pump to cause a reverse flow of fluid through the filter.

公开(公告)号：US10183493B2

公开(公告)日：2019-01-22

申请号：US15521286

申请日：2014-10-31

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Tommy D Deskins

IPC: B41J2/18 ,  B41J2/175 ,  B41J2/14

Abstract: A fluid ejection device includes a fluid slot, a plurality of fluid ejection chambers communicated with the fluid slot, a plurality of drop ejecting elements one of each within one of the fluid ejection chambers, a fluid circulation channel communicated with the fluid slot and one or more of the fluid ejection chambers, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide continuous circulation of fluid from the fluid slot through the fluid circulation channel and the one or more of the fluid ejection chambers.

公开(公告)号：US20190016133A1

公开(公告)日：2019-01-17

申请号：US16067304

申请日：2016-04-29

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Alexander Govyadinov ,  Craig Olbrich

IPC: B41J2/14

Abstract: In an example implementation, a method of printing with an emulsion, includes generating an emulsion of non-water based fluid and water based fluid on a printhead, and ejecting the emulsion through a printhead nozzle.

公开(公告)号：US10173435B2

公开(公告)日：2019-01-08

申请号：US15432400

申请日：2017-02-14

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Erik D. Torniainen ,  David P. Markel

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/175 ,  B01L3/00 ,  F04B19/00 ,  F04B19/20 ,  F04B19/24

Abstract: A fluid ejection device including, at least, one recirculation system is disclosed. Such recirculation system contains, at least, one drop generator, recirculation channels that include an inlet channel, an outlet channel and a connection channel and a fluid feedhole that communicates with the drop generator via the inlet channel and the outlet channel of the recirculation channel. The recirculation channels can be asymmetrical with reference to the drop generator.

公开(公告)号：US20180215148A1

公开(公告)日：2018-08-02

申请号：US15747835

申请日：2015-10-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D. Torniainen ,  Nicholas McGuinness ,  David P. Markel

IPC: B41J2/14

CPC classification number: B41J2/14016 ,  B41J2/1404 ,  B41J2/14056 ,  B41J2002/14467 ,  B41J2202/11 ,  B41J2202/12

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber communicated with the fluid slot and including a second drop ejecting element, a fluid circulation path communicated with the first fluid ejection chamber and the second fluid ejection chamber, and a fluid circulating element within the fluid circulation path.

公开(公告)号：US09981265B2

公开(公告)日：2018-05-29

申请号：US15134300

申请日：2016-04-20

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Pavel Kornilovich ,  Erik D. Torniainen ,  David P. Markel

IPC: F15D1/00 ,  F15D1/02 ,  B01L3/00 ,  B01F13/00 ,  B01F5/02 ,  B01F5/10 ,  B01F5/00 ,  F01D1/00 ,  F01D3/00

CPC classification number: B01L3/502715 ,  B01F5/0275 ,  B01F5/10 ,  B01F13/0059 ,  B01L3/50273 ,  B01L3/502738 ,  B01L3/502769 ,  B01L2200/0636 ,  B01L2300/0816 ,  B01L2300/0861 ,  B01L2300/0867 ,  B01L2300/088 ,  B01L2400/0406 ,  B01L2400/0415 ,  B01L2400/043 ,  B01L2400/0433 ,  B01L2400/0439 ,  B01L2400/0442 ,  B01L2400/0478 ,  B01L2400/0633 ,  F01D1/00 ,  F01D3/00

Abstract: A microfluidic mixing device comprises a main channel and a number of secondary channels extending from a portion of the main channel and entering another portion of the main channel. A number of actuators are located in the secondary channels to pump fluids through the secondary channels. A microfluidic mixing system comprises a microfluidic mixing device. The microfluidic mixing device comprises a main fluid mixing channel, a number of main channel actuators to pump fluid through the main fluid mixing channel, a number of secondary channels fluidly coupled to the main fluid mixing channel, and a number of secondary channel actuators to pump fluids through the secondary channels. The microfluidic mixing device also comprises a fluid source, and a control device to provide fluids from the fluid source to the microfluidic mixing device and activate the main channel actuators and secondary channel actuators.

公开(公告)号：US20180045562A1

公开(公告)日：2018-02-15

申请号：US15546917

申请日：2015-04-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Charles M. Santori ,  Alexander Govyadinov

IPC: G01J3/02 ,  G01N15/14

CPC classification number: G01J3/0218 ,  B01L3/502715 ,  B01L3/50273 ,  B01L2300/0654 ,  B01L2400/0442 ,  G01J3/0259 ,  G01N15/1436 ,  G01N15/1459 ,  G01N15/1484 ,  G01N21/05 ,  G01N21/648 ,  G01N2021/6482 ,  G02B6/00

Abstract: Provided in one example is an apparatus, including a microfluidic channel supported by a substrate. An optical spectrometer includes a waveguide supported by the substrate. The waveguide includes a coupler and outcouplers. A light source directs light to the coupler of the waveguide. Optical sensors are supported by the substrate. Each of the optical sensors is optically coupled to one of the outcouplers.

公开(公告)号：US20180022106A1

公开(公告)日：2018-01-25

申请号：US15546808

申请日：2015-04-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D Torniainen

IPC: B41J2/18

CPC classification number: B41J2/18 ,  B41J2/1404 ,  B41J2/14056 ,  B41J2/14153 ,  B41J2/175 ,  B41J2002/14354 ,  B41J2002/14403 ,  B41J2002/14467 ,  B41J2202/12

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber including a second drop ejecting element, and a fluid circulation path including a first portion communicated with the fluid slot and the second fluid ejection chamber, and a second portion communicated with the first fluid ejection chamber and the second fluid ejection chamber, with the fluid circulation path including a fluid circulating element within the first portion.