公开(公告)号：US11738507B2

公开(公告)日：2023-08-29

申请号：US16608882

申请日：2017-10-04

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

Inventor： Arthur H Barnes

IPC: B29C64/165 ,  B33Y40/00 ,  B29C64/393 ,  B33Y10/00 ,  B33Y50/02 ,  H04N1/00

CPC classification number: B29C64/165 ,  B29C64/393 ,  B33Y40/00 ,  H04N1/00978 ,  B33Y10/00 ,  B33Y50/02

Abstract: Some examples include a method of operating an additive manufacturing machine including forming a layer of a build material, selectively applying a fusing agent onto the formed layer of build material, applying fusing energy to the build material and fusing agent with a thermal energy source to form an object layer of a three dimensional object and a sacrificial layer of a sacrificial object at the selectively applied fusing agent, sensing a thermal temperature of the sacrificial layer, comparing the sensed thermal temperature of the sacrificial layer to a target temperature, and adjusting a power level of the thermal energy source based on the compared temperatures.

公开(公告)号：US20180319082A1

公开(公告)日：2018-11-08

申请号：US15765074

申请日：2016-01-29

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

Inventor： Arthur H Barnes ,  Pierre J. Kaiser

IPC: B29C64/286 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00

CPC classification number: B29C64/286 ,  B29C64/165 ,  B29C64/264 ,  B33Y10/00 ,  B33Y30/00

Abstract: An additive manufacturing apparatus or method may include an irradiation structure, an irradiation filter to filter at least a part of the radiation, to transmit a narrower wavelength range than the received wavelength range to the media.

公开(公告)号：US11225016B2

公开(公告)日：2022-01-18

申请号：US16608887

申请日：2017-10-20

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

Inventor： Arthur H Barnes

IPC: B29C64/188 ,  B29C64/232 ,  B29C64/245 ,  B29C64/295 ,  B29C64/218 ,  B29C64/153 ,  B29C64/194 ,  B33Y10/00 ,  B33Y30/00

Abstract: Some examples include a method of operating an additive manufacturing machine including spreading a build material in a first direction across a build surface to form a layer, the layer having a thickness, decreasing a distance between a spread mechanism and the build surface, and translating the spread mechanism in a second direction opposite the first direction over the build surface to reduce the thickness of the layer.

公开(公告)号：US20200230877A1

公开(公告)日：2020-07-23

申请号：US16608882

申请日：2017-10-04

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

Inventor： Arthur H Barnes

IPC: B29C64/165 ,  B29C64/393 ,  H04N1/00

Abstract: Some examples include a method of operating an additive manufacturing machine including forming a layer of a build material, selectively applying a fusing agent onto the formed layer of build material, applying fusing energy to the build material and fusing agent with a thermal energy source to form an object layer of a three dimensional object and a sacrificial layer of a sacrificial object at the selectively applied fusing agent, sensing a thermal temperature of the sacrificial layer, comparing the sensed thermal temperature of the sacrificial layer to a target temperature, and adjusting a power level of the thermal energy source based on the compared temperatures.

公开(公告)号：US20190245996A1

公开(公告)日：2019-08-08

申请号：US16329870

申请日：2016-09-07

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

Inventor： Ryan M Smith ,  Arthur H Barnes ,  Eric Andersen

IPC: H04N1/00 ,  H04N1/12 ,  H04N1/028 ,  H04N1/10

CPC classification number: H04N1/00748 ,  H04N1/00551 ,  H04N1/0057 ,  H04N1/00689 ,  H04N1/02825 ,  H04N1/04 ,  H04N1/1043 ,  H04N1/1215

Abstract: Example implementations relate to an edge sensing apparatus. For example, an edge sensing apparatus consistent to the present disclosure may include a reflector in a beam path of a retroreflective sensor. The edge sensing apparatus consistent with the present disclosure may include a cover glass located between the retroreflective sensor and the reflector. The edge sensing apparatus consistent with the present disclosure may include a media feeder to feed a media along a media path between the cover glass and the retroreflective sensor.

公开(公告)号：US11358820B2

公开(公告)日：2022-06-14

申请号：US16606609

申请日：2017-04-21

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

Inventor： Jody L Clayburn ,  Arthur H Barnes ,  Francisco Javier Gomez Maurer

IPC: B65H43/08 ,  B65H31/10 ,  B65H31/24 ,  B65H7/14

Abstract: A printing apparatus includes a media bin and a sensor, directed toward the media bin, having a first emitter and a receiver. The printing apparatus further includes a second emitter to emit photons toward the optical sensor, and a controller. The controller determines presence of a print media on the media bin based on a count of photons received from a source other than the first emitter, including the second emitter.

公开(公告)号：US11292202B2

公开(公告)日：2022-04-05

申请号：US16607826

申请日：2018-06-18

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

Inventor： Wesley R Schalk ,  Arthur H Barnes ,  Morgan T Schramm ,  Xin Cheng ,  Miguel Angel Lopez Alvarez

IPC: G05B19/042 ,  B29C64/393 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/232

Abstract: In one example, a control process for an additive manufacturing machine includes displacing a platform, measuring the actual displacement of the platform, determining that the actual displacement varies from a nominal displacement, and determining an amount of an agent to be applied to build material layered on the displaced platform based on the determined variation.

公开(公告)号：US20200182987A1

公开(公告)日：2020-06-11

申请号：US16606614

申请日：2017-04-21

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

Inventor： Jody L Clayburn ,  Arthur H Barnes ,  Francisco Javier Gomez Maurer

IPC: G01S7/497 ,  G01S17/89 ,  G01S7/4865

Abstract: An apparatus calibrates the optical sensor to calibrate the distance measured by the sensor with the expected distance using a calibration surface at the expected distance.

公开(公告)号：US10652414B2

公开(公告)日：2020-05-12

申请号：US16332092

申请日：2016-09-12

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

Inventor： Gareth Ryan Kelly ,  Curtis J Behrend ,  Matthew Douglas Reier ,  Arthur H Barnes ,  Kevin Lo

IPC: H04N1/00

Abstract: According to an example, a scanner apparatus may include a housing, a scan panel positioned on the housing and a lid rotatably mounted to the housing. The lid may be moved between a closed position and an open position, in which in the closed position, the lid covers the scan panel and in the open position, the lid is extended away from the scan panel. The scanner apparatus may also include an optical sensor to detect media placed on the scan panel and a media engine to determine whether the optical sensor has detected a media on the scan panel while the lid is in the open position.

公开(公告)号：US11220118B2

公开(公告)日：2022-01-11

申请号：US16606620

申请日：2017-04-21

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

Inventor： Arthur H Barnes ,  Jody L Clayburn ,  Francisco Javier Gomez Maurer

IPC: B41J11/00 ,  B41J13/10 ,  B65H1/04 ,  B65H7/14

Abstract: A printing apparatus uses a time of flight sensor to determine distance between the sensor and a surface facing the sensor, and uses a reflectivity value to determine presence of print media in a media bin.