公开(公告)号：US20220194078A1

公开(公告)日：2022-06-23

申请号：US17603475

申请日：2019-09-30

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

Inventor： Jeffrey A. Nielsen ,  Matthew David Smith ,  Roberto A. Pugliese

IPC: B41J2/045

Abstract: In one example in accordance with the present disclosure, a fluid ejection system is described. The fluid ejection system includes a frame to retain a number of fluid ejection devices. Each fluid ejection device includes a reservoir disposed on a first side of the frame and a fluid ejection die disposed on an opposite side of the frame. Each fluid ejection die includes 1) a fluid feed slot formed in a substrate to receive fluid from the reservoir, 2) an array of nozzles formed in the substrate to eject fluid, and 3) an ejection adjustment system to selectively adjust an amount of fluid ejected from the fluid ejection devices.

公开(公告)号：US09469107B2

公开(公告)日：2016-10-18

申请号：US14787729

申请日：2013-07-12

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

Inventor： James Elmer Abbott, Jr. ,  Roberto A. Pugliese ,  Greg Scott Long

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/14129 ,  B41J2/14016 ,  B41J2/14088 ,  B41J2/14112 ,  B41J2/1601 ,  B41J2/164 ,  B41J2/1642 ,  B41J2/1646 ,  B41J2202/03 ,  B41J2202/11 ,  H01C1/148 ,  H01C7/006 ,  H01C17/0652 ,  H01C17/06526 ,  H01L27/11582 ,  H01L28/00

Abstract: The present disclosure is drawn to a thermal inkjet printhead stack with an amorphous metal resistor, including an insulated substrate and a resistor applied to the insulated substrate. The resistor can include from 5 atomic % to 90 atomic % of a metalloid of carbon, silicon, or boron; and from 5 atomic % to 90 atomic % each of a first and second metal of titanium, vanadium, chromium, cobalt, nickel, zirconium, niobium, molybdenum, rhodium, palladium, hafnium, tantalum, tungsten, iridium, or platinum, where the second metal is different than the first metal. The metalloid, the first metal, and the second metal can account for at least 70 atomic % of the amorphous thin metal film.

Abstract translation: 本公开涉及具有非晶金属电阻器的热喷墨打印头堆叠，其包括绝缘基板和施加到绝缘基板的电阻器。 电阻器可以包括5原子％至90原子％的碳，硅或硼准金属; 和钛，钒，铬，钴，镍，锆，铌，钼，铑，钯，铪，钽，钨，铱或铂的第一和第二金属的5原子％至90原子％ 第二金属与第一金属不同。 准金属，第一金属和第二金属可以占非晶金属薄膜的至少70原子％。

公开(公告)号：US20230280262A1

公开(公告)日：2023-09-07

申请号：US18023718

申请日：2020-09-09

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

Inventor： Viktor Shkolnikov ,  Joshua M. Yu ,  Matthew David Smith ,  Roberto A. Pugliese

IPC: G01N15/14

CPC classification number: G01N15/1484 ,  G01N15/1429

Abstract: In one example in accordance with the present disclosure, a particle detection system is described. The particle detection system includes a microfluidic channel through which fluid is to flow. The fluid includes particles. The particle detection system also includes a sensing circuit to output a resonant frequency. The sensing circuit includes a pair of electrodes disposed within the microfluidic channel. Contents of a volume between the pair of electrodes changes a capacitance between the pair of electrodes. A change in the capacitance changes the resonant frequency output by the sensing circuit. The particle detection system also includes a controller to determine the contents of the volume based on the resonant frequency.

公开(公告)号：US20230256440A1

公开(公告)日：2023-08-17

申请号：US18011502

申请日：2020-06-26

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

Inventor： Roberto A. Pugliese ,  Kathryn H. Cyr ,  Michael J. Day ,  Diane R. Hammerstad

IPC: B01L3/00 ,  G01N1/34

CPC classification number: B01L3/502761 ,  G01N1/34 ,  B01L2200/0652 ,  B01L2300/0636 ,  B01L2300/088 ,  G01N2015/1081

Abstract: In one example in accordance with the present disclosure, am ejection system is described. The ejection system includes a fluid feed slot to supply fluid to a number of fluid ejection channels where each fluid ejection channel is a recirculating channel. Each fluid ejection channel includes a sensor to detect, in the fluid, a target particle to be ejected and a fluid ejector to eject the target particle from the fluid ejection channel. The ejection system also includes a controller to selectively activate the fluid ejector when the target particle presence is detected. Non-target particles are returned to the fluid feed slot past the fluid ejector.

公开(公告)号：US20180001636A1

公开(公告)日：2018-01-04

申请号：US15544999

申请日：2015-03-12

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

Inventor： Zhizhang Chen ,  James Elmer Abbott, JR. ,  Michael W. Cumbie ,  Roberto A. Pugliese

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/14129 ,  B41J2/14024 ,  B41J2/1603 ,  B41J2/1642 ,  B41J2/1646

Abstract: In one example, a printhead structure includes an ejector element, a multi-layer insulator covering the ejector element, and an amorphous metal on the insulator.