公开(公告)号：US20170313066A1

公开(公告)日：2017-11-02

申请号：US15521481

申请日：2014-10-30

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

Inventor： Lawrence H White ,  Arun K Agarwal ,  Ron Burns

IPC: B41J2/14

CPC classification number: B41J2/1433 ,  B41J2/1404 ,  B41J2/1412 ,  B41J2/155 ,  B41J2/175 ,  B41J2/2125 ,  B41J2/2146 ,  B41J3/543 ,  B41J2002/14475 ,  B41J2202/20

Abstract: Printheads and printers are described herein. In one example, a printhead includes a number of drop generators disposed in a first array and a second array. The drop generators in both the first array and the second array are spaced one dot pitch apart perpendicular to the motion of a print medium, and alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. Each drop generator in the first array is in a line of the motion of the print medium with a corresponding drop generator in the second array, wherein each HDW drop generator in the first array is in line with an LDW drop generator in the second array, and each LDW drop generator in the first array is in line with an HDW drop generator in the second array.

公开(公告)号：US20170305152A1

公开(公告)日：2017-10-26

申请号：US15521568

申请日：2014-10-30

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

Inventor： Lawrence H White ,  Arun K Agarwal ,  Ron Burns

IPC: B41J2/14

Abstract: Printheads and printers are described herein. In one example, a printhead includes a plurality of nozzles configured to eject ink drops of different sizes wherein a low drop weight (LDW) drop is ejected through a nozzle with a circular bore (CB), and a high drop weight (HDW) drop is ejected through a nozzle with a non-circular bore (NCB).

公开(公告)号：US20170259569A1

公开(公告)日：2017-09-14

申请号：US15329972

申请日：2014-07-31

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

Inventor： Lawrence H White ,  Ronald A. Askeland

IPC: B41J2/14

CPC classification number: B41J2/1433 ,  B41J2/14016 ,  B41J2/14201 ,  B41J2/16505 ,  B41J2/16552

Abstract: A printhead of a printer includes a nozzle plate having a first layer, a second layer, and an intermediate channel. The first layer can have at least one fluid chamber for holding an immiscible fluid, and a plurality of ejection fluid chamber for holding an ejection fluid. The second layer can have a plurality of ejection fluid nozzles, one ejection fluid nozzle being in fluid communication with one ejection fluid chamber. The intermediate channel can form a passage between the first layer and the second layer. Further, the intermediate channel is in fluid communication with the fluid chambers to carry the immiscible fluid from the fluid chambers towards each of the ejection fluid nozzles for forming a layer of the immiscible fluid over the ejection fluid chambers to maintain the printhead.

公开(公告)号：US11440331B2

公开(公告)日：2022-09-13

申请号：US17068443

申请日：2020-10-12

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

Inventor： Nick McGuinness ,  Lawrence H White ,  Paul A Richards

IPC: B41J2/19 ,  B41J2/175 ,  B41J2/14 ,  B41J2/18

Abstract: A fluid ejection system may include a media transport assembly and a printhead assembly having a fluid ejection device opposite the media transport assembly. The fluid ejection device may include a drop ejecting element and a fluid ejection chamber containing the drop ejection element. The fluid ejection chamber has an inlet and an outlet for fluid circulation through the fluid ejection chamber across the drop ejecting element. A particle tolerant architecture is between the inlet and the drop ejecting element.

公开(公告)号：US10828908B2

公开(公告)日：2020-11-10

申请号：US16141907

申请日：2018-09-25

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

Inventor： Nick McGuinness ,  Lawrence H White ,  Paul A Richards

IPC: B41J2/19 ,  B41J2/175 ,  B41J2/14 ,  B41J2/18

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 a first end with the fluid slot and communicated at a second end with the fluid ejection chamber, and a particle tolerant architecture within the fluid circulation channel at the second end.

公开(公告)号：US10112407B2

公开(公告)日：2018-10-30

申请号：US15541963

申请日：2015-01-29

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

Inventor： Nick McGuinness ,  Lawrence H White ,  Paul A Richards

IPC: B41J2/19 ,  B41J2/175 ,  B41J2/14 ,  B41J2/18

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 a first end with the fluid slot and communicated at a second end with the fluid ejection chamber, a fluid circulating element within the fluid circulation channel, and a particle tolerant architecture within the fluid circulation channel at the second end.

公开(公告)号：US20180009222A1

公开(公告)日：2018-01-11

申请号：US15547116

申请日：2015-04-27

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

Inventor： Rio Rivas ,  Lawrence H White ,  Ed Friesen ,  Erik D Torniainen

IPC: B41J2/14 ,  B41J2/16

Abstract: In some examples, a printhead can include a main printer fluid line, a firing chamber in fluid communication with the main printer fluid line to receive printer fluid from the main printer fluid line, and a resistor positioned in the firing chamber. The resistor can, for example, receive an electronic current to cause the resistor to heat up and eject printer fluid droplets from the printhead. The printhead can further include a photolithographically fabricated check valve positioned in the firing chamber. The check valve can, for example, be openable to allow filling of the firing chamber with printer fluid and closeable to at least partially seal the main printer fluid line from printer fluid blowback caused by the resistor.

公开(公告)号：US20170313077A1

公开(公告)日：2017-11-02

申请号：US15521285

申请日：2014-10-30

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

Inventor： Lawrence H White ,  Thomas J Cardinali ,  Michael Hager

IPC: B41J2/16 ,  B41J2/14

CPC classification number: B41J2/1604 ,  B41J2/14129 ,  B41J2/1603 ,  B41J2/1626 ,  B41J2/1631 ,  B41J2/164 ,  B41J2/175

Abstract: Printheads and methods for forming printheads are described herein. In one example, a printhead includes a single resistor window in a conducting layer within the printhead. The printhead also includes a number of resistors formed in a resistor film deposited over the single resistor window. The resistors have two different widths, and each of the two different widths ejects a different droplet size when energized.

公开(公告)号：US20170305170A1

公开(公告)日：2017-10-26

申请号：US15521287

申请日：2014-10-30

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

Inventor： Lawrence H White ,  Melinda M Valencia ,  Michael Hager

IPC: B41J2/21 ,  B41J2/14 ,  B41J2/175 ,  B41J2/045 ,  H04N1/405

CPC classification number: B41J2/14 ,  B41J2/04595 ,  B41J2/1404 ,  B41J2/14129 ,  B41J2/1433 ,  B41J2/14427 ,  B41J2/175 ,  B41J2/2125 ,  B41J2/2146 ,  B41J2202/11

Abstract: Printheads and methods for forming printheads are described herein. In one example, a printhead includes a number of drop generators, wherein a pitch between each adjacent drop generator is substantially the same, and the drop generators alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. The printhead also includes a flow channel from an ink source leading into an ejection chamber associated with each drop generator, wherein the flow channel comprises an inflow region proximate to the ink source, wherein an area of the inflow region is adjusted to control the flux of ink into the ejection chamber.

公开(公告)号：US20210023853A1

公开(公告)日：2021-01-28

申请号：US17068443

申请日：2020-10-12

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

Inventor： Nick McGuinness ,  Lawrence H White ,  Paul A Richards

IPC: B41J2/19 ,  B41J2/175 ,  B41J2/14 ,  B41J2/18

Abstract: A fluid ejection system may include a media transport assembly and a printhead assembly having a fluid ejection device opposite the media transport assembly. The fluid ejection device may include a drop ejecting element and a fluid ejection chamber containing the drop ejection element. The fluid ejection chamber has an inlet and an outlet for fluid circulation through the fluid ejection chamber across the drop ejecting element. A particle tolerant architecture is between the inlet and the drop ejecting element.