公开(公告)号：US20210402694A1

公开(公告)日：2021-12-30

申请号：US16607567

申请日：2018-04-27

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

Inventor： Wojciech Jerzy Krasowski ,  Justin M. Roman ,  Xavier Alonso Becerro

IPC: B29C64/35 ,  A47L7/00 ,  B33Y40/00

Abstract: An example method to remove build material from a container is described. In that example a pulsed gas flow may be induced in a conduit to aspirate build material in pulses from the container.

公开(公告)号：US20210402690A1

公开(公告)日：2021-12-30

申请号：US16607550

申请日：2018-04-25

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

Inventor： Justin M. Roman ,  Xavier Alonso Becerro ,  Wojciech Jerzy Krasowski ,  Neil Telfer ,  Michael Duda

IPC: B29C64/245 ,  B29C64/255 ,  B29C64/165 ,  B29C64/35 ,  B29C64/364

Abstract: There is disclosed a method of cooling a bed of build material 12, 14 generated by additive manufacture. A container 10 containing a bed of build material may be provided, the bed having a hot region relative to ambient temperature. The container may be vibrated to fluidize unfused build material 12 in the container so as to cause convection of the unfused build material to cool the hot region. There is also disclosed a method of cooling a bed of build material 12, 14 including vibration when the temperature of a hot region in the bed of build material is higher than an unpacking threshold. There is also disclosed a cooling apparatus for cooling a bed of build material by vibration.

公开(公告)号：US20210276259A1

公开(公告)日：2021-09-09

申请号：US16607883

申请日：2018-04-07

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

Inventor： Justin M. Roman ,  Luke P. Sosnowski ,  David R. Otis

IPC: B29C64/321 ,  B29C64/314 ,  B29C64/343 ,  B29C64/393 ,  B29C64/153 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y50/02

Abstract: In one example, a pneumatic transport system to transport build material in an additive manufacturing machine includes a conduit, a source of air pressure to pull or push a stream of air through the conduit, a source of build material to introduce a build material into the stream of air, a separator to remove build material from the stream of air, a flow meter downstream from the separator to measure the stream of air flowing through the conduit, and a controller operatively connected to the flow meter and to the source of air pressure and/or the sources of build material to, based on a measurement from the flow meter, adjust a rate of flow of the stream of air in the conduit.

公开(公告)号：US20200061918A1

公开(公告)日：2020-02-27

申请号：US16070760

申请日：2016-04-30

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

Inventor： Bradley B. Branham ,  Justin M. Roman ,  Wesley R. Schalk

IPC: B29C64/314 ,  B29C64/205 ,  B29C64/329 ,  B29C64/255 ,  B29C64/393

Abstract: In one example, a build material supply system for additive manufacturing includes a mixer to aperiodically rotate a non-circular mixing chamber containing powdered build material to form mixed powdered build material.

公开(公告)号：US20190291992A1

公开(公告)日：2019-09-26

申请号：US16437859

申请日：2019-06-11

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

Inventor： Wesley R. SCHALK ,  Jeffrey G. Bingham ,  Justin M. Roman ,  Andrew T. Davis

IPC: B65H7/06 ,  B65H7/18 ,  B65H7/08 ,  B65H7/20 ,  B65H29/20 ,  B65H3/06

Abstract: According to an example, an apparatus to prevent media transport jams may include an actuator to load and advance a media within a media path width. The apparatus may also include a first sensor and a second sensor to detect respective edges of the media, in which the first sensor and the second sensor may be positioned outside of a media action area and on opposite sides of the media path width. The apparatus may further include a controller to prevent the actuator from advancing the media along the media path in response to a detection of one or both of the first edge of the media by the first sensor and the second edge of the media by the second sensor.

公开(公告)号：US20180118489A1

公开(公告)日：2018-05-03

申请号：US15570225

申请日：2015-05-15

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

Inventor： Wesley R. Schalk ,  Jeffrey G. Bingham ,  Justin M. Roman ,  Andrew T. Davis

IPC: B65H7/06 ,  B65H7/18 ,  B65H3/06 ,  B65H29/20

CPC classification number: B65H7/06 ,  B65H3/06 ,  B65H7/08 ,  B65H7/18 ,  B65H7/20 ,  B65H29/20 ,  B65H2220/02 ,  B65H2402/46 ,  B65H2511/10 ,  B65H2511/20 ,  B65H2511/216 ,  B65H2511/242 ,  B65H2511/414 ,  B65H2513/512 ,  B65H2551/20 ,  B65H2553/822 ,  B65H2701/1315 ,  B65H2801/03 ,  B65H2801/12 ,  B65H2801/39 ,  B65H2220/01 ,  B65H2220/03

Abstract: According to an example, an apparatus to prevent media transport jams may include an actuator to load and advance a media within a media path width. The apparatus may also include a first sensor and a second sensor to detect respective edges of the media, in which the first sensor and the second sensor may be positioned outside of a media action area and on opposite sides of the media path width. The apparatus may further include a controller to prevent the actuator from advancing the media along the media path in response to a detection of one or both of the first edge of the media by the first sensor and the second edge of the media by the second sensor.

公开(公告)号：US11964277B2

公开(公告)日：2024-04-23

申请号：US17691214

申请日：2022-03-10

Applicant: Hewlett-Packard Development Company L.P.

Inventor： David Olsen ,  Si-lam J. Choy ,  Paul Mark Haines ,  Justin M. Roman

IPC: G01N33/68 ,  A01N1/02 ,  B01L3/00 ,  C07C309/65 ,  C07C309/73 ,  G01N1/40 ,  G01N21/01 ,  G01N21/31 ,  G01N21/33 ,  G01N21/64 ,  G01N27/414 ,  G01N33/52 ,  G01N33/532 ,  G01N33/543 ,  G01N33/569 ,  G01N33/72 ,  G01N35/00 ,  G01N35/02 ,  G01N35/04 ,  G01N35/10

CPC classification number: B01L3/502746 ,  B01L2300/048 ,  B01L2400/0487 ,  B01L2400/0605 ,  B01L2400/0622 ,  B01L2400/082

Abstract: A metered volume microfluidic device can include fluid flow microfluidics. The fluid flow microfluidics can include an inflow channel, a metered volume chamber positioned to receive working fluid from the inflow channel, a metered volume outflow channel positioned to receive and direct a metered volume of the working fluid when discharged from the metered volume chamber, and a capillary check valve. The capillary check valve can allow excess working fluid to exit the metered volume chamber when filling the metered volume chamber via the inflow channel. The capillary check valve can also prevent excess working fluid that has passed there through from being reintroduced into the metered volume chamber when the working fluid is discharged into the metered volume outflow channel.

公开(公告)号：US11745429B2

公开(公告)日：2023-09-05

申请号：US16607545

申请日：2018-04-25

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

Inventor： Justin M. Roman ,  Luke P. Sosnowski

IPC: B29C64/357 ,  B29C64/314 ,  B33Y40/10 ,  B29C64/255 ,  B33Y40/00

CPC classification number: B29C64/357 ,  B29C64/255 ,  B29C64/314 ,  B33Y40/00 ,  B33Y40/10

Abstract: In one example, a build material recovery system for additive manufacturing includes: a receiving station to receive a portable container containing a build material; a separator to remove build material from a stream of air; a first conduit to carry build material in the stream of air from the receiving station to the separator; a source of negative air pressure to pull the stream of air with the build material through the first conduit from the receiving station to the separator; a humidifier to add moisture to the stream of air; and a second conduit to carry build material from the separator to the receiving station.

公开(公告)号：US11518102B2

公开(公告)日：2022-12-06

申请号：US16075625

申请日：2017-07-19

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

Inventor： Joshua Schmale ,  Robert Lawrence Winburne ,  Tait A. Regnier ,  Michael Duda ,  Justin M. Roman

IPC: B29C64/35 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B29C64/245 ,  B29C64/393 ,  B29C64/165 ,  B29C64/357 ,  B08B7/02 ,  B29C64/209 ,  B08B5/04

Abstract: In one example in accordance with the present disclosure, an additive manufacturing platform is described. The additive manufacturing platform includes a vibrating bed on which a volume of build material is to be disposed. The bed is to vibrate to remove excess build material and operates in at least two extraction modes during a build material extraction period. The additive manufacturing platform also includes a non-vibrating frame to support the vibrating bed.

公开(公告)号：US11426927B2

公开(公告)日：2022-08-30

申请号：US16075675

申请日：2017-07-31

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

Inventor： David R. Otis, Jr. ,  Kevin E. Swier ,  Justin M. Roman ,  Wesley R. Schalk

IPC: B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/329 ,  B29C64/336 ,  B29C64/153 ,  B29C64/357

Abstract: Example implementations relate to different mixtures of build materials deliverable during a three dimensional (3D) print operation. In some examples, a 3D print apparatus may include a delivery hopper to deliver build material to a print zone of the 3D print apparatus and a plurality of build material hoppers to which the delivery hopper is connected for receipt of at least one of a corresponding plurality of build materials. A controller of the 3D print apparatus may direct that variable proportions of a first build material relative to a second build material are receivable by the delivery hopper from the plurality of build material hoppers during the 3D print operation, where different mixtures of the variable proportions of the first build material and the second build material are deliverable to the delivery hopper during the 3D print operation.