公开(公告)号：US11181244B2

公开(公告)日：2021-11-23

申请号：US16607482

申请日：2018-03-26

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

Inventor： Arthur H Barnes ,  William Winters

IPC: F21S8/04 ,  F21V7/00 ,  B29C64/286 ,  B29C64/282 ,  F21Y103/00

Abstract: In one example, a lighting assembly includes a housing to hold an elongated lamp and an elongated device attached to or integral with the housing and configured to, when an lamp is held in the housing, convert light from the lamp having a first irradiance that is non-uniform along a length into light having a second irradiance that is uniform along the length.

公开(公告)号：US20210114382A1

公开(公告)日：2021-04-22

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.

公开(公告)号：US20200055688A1

公开(公告)日：2020-02-20

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: B65H31/10 ,  B65H31/24

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：US20200039779A1

公开(公告)日：2020-02-06

申请号：US16606603

申请日：2017-04-21

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

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

IPC: B65H43/06 ,  B65H43/08 ,  B65H31/24

Abstract: According to examples, a printing apparatus may include an output bin that is laterally translatable between a retracted position and an extended position. The printing apparatus may also include a sensor to detect a height of a stack of media on the output bin while the output bin is in the retracted position and a controller. The controller may determine whether the detected height of the stack of media on the output bin exceeds a certain level and in response to a determination that the detected height of the stack of media exceeds the certain level, laterally translate the output bin from the retracted position to the extended position.

公开(公告)号：US11478985B2

公开(公告)日：2022-10-25

申请号：US16635051

申请日：2017-10-18

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

Inventor： Arthur H Barnes

IPC: B29C64/314 ,  B29C64/165 ,  C08K3/22 ,  C08L77/02 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y70/10

Abstract: An example of a build material for three-dimensional (3D) printing includes a preconditioned polymer or polymer composite powder. A percent crystallinity of the preconditioned polymer or polymer composite powder is reduced by a volume percentage ranging from about 0.5% to about 3% compared to a percent crystallinity of a corresponding untreated polymer or polymer composite powder.

公开(公告)号：US11415685B2

公开(公告)日：2022-08-16

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 ,  G01S7/4865 ,  G01S17/89 ,  G01S17/00

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：US20210331415A1

公开(公告)日：2021-10-28

申请号：US16608255

申请日：2018-06-15

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

Inventor： Arthur H Barnes ,  Vanessa Verzwyvelt ,  Matthew A Shepherd

IPC: B29C64/393 ,  B29C64/165 ,  B29C64/209 ,  B29C64/336 ,  B33Y50/02

Abstract: A system determines a difference in energy absorptions by a plurality of different energy absorbing agents used to form an object by an additive manufacturing machine. The system adjusts, based on the determined difference, an amount of an energy absorbing agent of the plurality of different energy absorbing agents dispensed for a build operation of the additive manufacturing machine.

公开(公告)号：US20210331410A1

公开(公告)日：2021-10-28

申请号：US16607802

申请日：2018-06-17

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

Inventor： Arthur H Barnes ,  Alejandro Manuel de Pena ,  Sebastia Cortes I Herms

IPC: B29C64/393 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/295 ,  B29C64/264

Abstract: In one example, a control process for additive manufacturing includes: forming an extent of unfused build material on a support; applying a coolant to unfused build material within the extent of unfused build material in a pattern of spots; capturing a thermal image of the extent of unfused build material with a thermal imaging device; mapping a pixel location in the thermal image to a physical location for each of multiple spots in the pattern; and based on the mapping, establishing a transform between pixels on the thermal imaging device and physical locations on the support.

公开(公告)号：US11148365B2

公开(公告)日：2021-10-19

申请号：US16075213

申请日：2017-01-15

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

Inventor： Arthur H Barnes ,  William Winters

IPC: B29C64/20 ,  B29C64/205 ,  G02B5/26 ,  B33Y30/00 ,  B29C64/264 ,  B29C64/295 ,  B29K105/00

Abstract: In one example, a reflector assembly includes a single reflector having at least two elliptical-shaped reflector cavities each with a respective focus point. The shape of the single reflector includes two partial elliptical-shaped reflector cavities having mirror-asymmetric profiles on each end of the single reflector each having a first side extending to a distal end and the first side longer than an opposite second side. The remaining elliptical-shaped reflector cavities have a first side and a second side the same length as the opposite second sides of the two partial elliptical-shaped reflector cavities.

公开(公告)号：US11091347B2

公开(公告)日：2021-08-17

申请号：US16606603

申请日：2017-04-21

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

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

IPC: B65H43/06 ,  B65H31/24 ,  B65H43/08

Abstract: According to examples, a printing apparatus may include an output bin that is laterally translatable between a retracted position and an extended position. The printing apparatus may also include a sensor to detect a height of a stack of media on the output bin while the output bin is in the retracted position and a controller. The controller may determine whether the detected height of the stack of media on the output bin exceeds a certain level and in response to a determination that the detected height of the stack of media exceeds the certain level, laterally translate the output bin from the retracted position to the extended position.