公开(公告)号：US11590762B2

公开(公告)日：2023-02-28

申请号：US17278684

申请日：2018-12-04

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

Inventor： Wesley R. Schalk ,  Kenneth Williams ,  Christopher John Arnold

IPC: B41J2/18 ,  B41J2/175

Abstract: A method of recirculating printing fluid that includes with a first pump upstream of an internal reservoir, pumping printing fluid into the reservoir and with a second pump downstream of the internal reservoir and upstream of a pen assembly, pumping printing fluid from the reservoir.

公开(公告)号：US20220032645A1

公开(公告)日：2022-02-03

申请号：US17278684

申请日：2018-12-04

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

Inventor： Wesley R. Schalk ,  Kenneth Williams ,  Christopher John Arnold

IPC: B41J2/18 ,  B41J2/175

Abstract: A method of recirculating printing fluid that includes with a first pump upstream of an internal reservoir, pumping printing fluid into the reservoir and with a second pump downstream of the internal reservoir and upstream of a pen assembly, pumping printing fluid from the reservoir.

公开(公告)号：US11407175B2

公开(公告)日：2022-08-09

申请号：US16075219

申请日：2017-04-20

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

Inventor： Kenneth Williams ,  Brent Ewald

IPC: B29C64/314 ,  B33Y30/00 ,  B29C64/295 ,  B33Y40/10 ,  H05B3/00 ,  H05B3/22 ,  B29C64/205 ,  B33Y10/00 ,  B29C64/153

Abstract: In some examples, preheat three-dimensional (3D) printer build material can include a heating plate of a 3D printer to preheat build material from below the build material, where the heating plate is located adjacent to a build platform of the 3D printer, and a heater-spreader carriage of the 3D printer to preheat the build material from above the build material and spread the preheated build material from the heating plate to the build platform.

公开(公告)号：US11305525B2

公开(公告)日：2022-04-19

申请号：US17049139

申请日：2018-07-13

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

Inventor： Howard G Wong ,  Wesley R Schalk ,  Kris R Livingston ,  Duane A Koehler ,  Kenneth Williams ,  Tyler Kapp

IPC: B41J2/175 ,  B41F31/02

Abstract: An example printing device may comprise an indicator to convey information to a user, a print substance reservoir to house a print substance, where the print substance reservoir is communicatively coupled to a fill port, a sensor to determine when a refill container is connected to the fill port, a processing resource, and a non-transitory machine-readable medium storing instructions executable by the processing resource to transmit signals to the indicator responsive to an indication that the sensor has detected the refill container connected to the fill port, where the signals correspond to the information to be conveyed by the indicator, and authenticate the refill container.

公开(公告)号：US11104150B2

公开(公告)日：2021-08-31

申请号：US16767314

申请日：2018-08-30

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

Inventor： Steve A. O'Hara ,  Kenneth Williams ,  Wesley R. Schalk

IPC: G03G15/00 ,  B41J2/00 ,  B67C3/00 ,  B41J2/175 ,  G03G15/08 ,  B67C3/26 ,  B67C3/28 ,  G03G15/10

Abstract: In some examples, an apparatus can include a pawl including an anti-rotation surface and a spring, and a valve housing including a wedge, where the spring biases the pawl to a first position in response to the valve housing being at a closed position such that the wedge of the valve housing contacts the anti-rotation surface of the pawl to prevent rotation of the valve housing at the first position of the pawl.

公开(公告)号：US11383524B2

公开(公告)日：2022-07-12

申请号：US16767343

申请日：2018-08-30

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

Inventor： Steve A. O'Hara ,  Kenneth Williams ,  David Moeller ,  Howard G. Wong ,  Ki Jung Han

IPC: B41J2/175

Abstract: In some examples, an apparatus can include a supply reservoir including print substance, and a rotary valve having a central rotary axis, where the central rotary axis is perpendicular to a height of the supply reservoir, where the rotary valve is in a closed position such that the print substance is unable to be supplied from the supply reservoir.

公开(公告)号：US20210291538A1

公开(公告)日：2021-09-23

申请号：US17054549

申请日：2018-08-30

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

Inventor： Kenneth Williams ,  Steve A. O'Hara

IPC: B41J2/175

Abstract: An example of apparatus including an attachment assembly to mate a liquid supply with a reservoir is provided. The apparatus includes an outlet port disposed on the attachment assembly, wherein the outlet port is to dispense liquid from the liquid supply to a receiving port of the reservoir. The apparatus includes a main vent port disposed on the attachment assembly, wherein the main vent port is to receive air from the reservoir as the liquid enters the reservoir. The apparatus includes a plug disposed on the attachment assembly, wherein the plug is to seal a secondary vent when the attachment assembly is mated with the reservoir, and wherein the plug is to break a seal with the secondary vent prior to detachment of the attachment assembly to recover the liquid from the attachment assembly.

公开(公告)号：US10647126B2

公开(公告)日：2020-05-12

申请号：US16082608

申请日：2016-10-31

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

Inventor： Kenneth Williams ,  Matt G Driggers ,  Bruce A McFadden ,  William Osborne

IPC: B41J25/34 ,  B41J2/175 ,  B41J2/165

Abstract: A printing subassembly is disclosed. The printing subassembly includes a printbar. A frame is coupled to the printbar such that the printbar dos not move with respect to the frame. A fluid supply system is coupled to the printbar.

公开(公告)号：US10479106B2

公开(公告)日：2019-11-19

申请号：US16067294

申请日：2016-04-29

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

Inventor： Gregory N Burton ,  Jody L Clayburn ,  Kurt F Olsen ,  Steven B Elgee ,  Jacob McDonald Smith ,  Kenneth Williams ,  Lorraine T Golob

IPC: B41J2/21 ,  B41J2/15 ,  B41J2/165 ,  B41J2/045

Abstract: A drop detector includes a printed circuit board (PCB) including a number of optical channels each formed by a light emitter and a light detector and a number of holes defined in the PCB over which the optical channels pass over and through which a number of ejected drops from a number of printheads pass through wherein each of the number of holes defined in PCB are sized to contour the shape of the number of the printheads.

公开(公告)号：US20190092028A1

公开(公告)日：2019-03-28

申请号：US16082608

申请日：2016-10-31

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

Inventor： Kenneth Williams ,  Matt G Driggers ,  Bruce A McFadden ,  William Osborne

IPC: B41J2/175 ,  B41J2/165

Abstract: A printing subassembly is disclosed. The printing subassembly includes a printbar. A frame is coupled to the printbar such that the printbar dos not move with respect to the frame. A fluid supply system is coupled to the printbar.