公开(公告)号：US11511490B2

公开(公告)日：2022-11-29

申请号：US16607860

申请日：2018-03-14

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

Inventor： Rhys Mansell ,  Pablo Antonio Murciego Rodriguez ,  Ignacio Alejandre Fernandez

IPC: B29C64/371 ,  B29C64/25 ,  B22F12/00 ,  B33Y30/00 ,  B33Y40/00 ,  B22F10/10

Abstract: A method of changing the gas content of a device (100) which comprises a first chamber (110). The method comprises: arranging the device in a first configuration, wherein the first chamber has a first internal volume; providing a flow of a first gas to the first chamber so that the gas content of the first chamber is at least partially changed; transitioning the device from the first configuration to a second configuration, wherein the first chamber has a second internal volume which is grater than the first internal volume.

公开(公告)号：US20210245439A1

公开(公告)日：2021-08-12

申请号：US17049589

申请日：2018-10-16

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Vicente Granados Asensio

IPC: B29C64/336 ,  B29C64/165 ,  B29C64/205 ,  B29C64/329

Abstract: In one example, a material dispensing apparatus comprises a plurality of material containers, wherein the plurality of material containers comprises a first set of material containers arranged to contain a first material and a second set of material containers arranged to contain a second, different, material, and each material container of the second set is located relative to a respective material container of the first set to form a pair of materiel containers. In use, the material dispensing apparatus is controllable to move across a build platform of an additive manufacturing system. Each of the plurality of material containers comprises an outlet mechanism that is independently controllable, relative to outlet mechanisms of others of the plurality of material containers, such that each pair of material containers selectively dispenses at least a portion of a respective amount of material onto a respective portion of the build platform as the material dispensing apparatus moves across the build platform, such that, collectively, the plurality of material containers forms a complete layer of material on the build platform as the material dispensing apparatus performs a single pass across the build platform.

公开(公告)号：US20230256734A1

公开(公告)日：2023-08-17

申请号：US18012041

申请日：2020-07-08

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

Inventor： Mohammad Jowkar ,  Luis Garcia Garcia ,  Rhys Mansell

IPC: B41J2/045

CPC classification number: B41J2/04558 ,  B41J2/04586

Abstract: According to one aspect, there is provided a method of detecting printhead issues in a printer. The method comprises obtaining an image to be printed, generating a first sub-pattern and a second sub-pattern, wherein the first sub-pattern in a pattern to be printed in a first pass comprising a pattern suitable to enable the detection of a printhead issue and wherein the second sub-pattern is the complementary pattern that completes the first sub-pattern such that printing the first and second sub-patterns is equivalent to printing the obtained image, printing the first sub-pattern on a print target, obtaining an image of the printed first sub-pattern, analysing the image of the printed first sub-pattern to determine the presence of a printhead issue and, where appropriate, performing a printhead maintenance operation, and printing the second sub-pattern on the print target.

公开(公告)号：US20220379256A1

公开(公告)日：2022-12-01

申请号：US17762678

申请日：2020-01-29

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Ahmed Elibiary

IPC: B01D46/71 ,  B29C64/35

Abstract: According to one example, there is provided a method of cleaning a filter in a filter housing. The filter has a dirty side at which a dirty airflow is received, and a clean side through which a cleaned airflow flows. The method comprises generating a cleaning airflow at the dirty side of the filter, the cleaning airflow having a predetermined volume and pressure, and generating an extraction airflow to extract from the filter housing the same volume and pressure of air from the filter housing as that generated in the filter housing by the cleaning airflow.

公开(公告)号：US20220134667A1

公开(公告)日：2022-05-05

申请号：US17416383

申请日：2019-07-15

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Emiliano Tolosa Gonzalez

IPC: B29C64/35 ,  B22F10/68 ,  B28B1/00 ,  B33Y30/00 ,  B33Y40/20

Abstract: An example of a self-cleaning apparatus for a 3D system is disclosed. The apparatus comprises a surface on which build material accumulates during a 3D printing operation. The surface has a profile that slopes generally down towards a collection point. The apparatus also comprises the collection point located in the surface to drain build material from the surface. The apparatus further comprises a vibrating source to cause the surface to vibrate. The apparatus also comprises a controller to control the vibrating source to vibrate, upon determining that a cleaning operation is to be performed, to drive build material accumulated on the surface towards the collection point.

公开(公告)号：US20240009739A1

公开(公告)日：2024-01-11

申请号：US17786038

申请日：2020-04-27

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Carlos Eduardo Caballero Diaz

IPC: B22F10/77 ,  B29C64/357 ,  B29C64/393 ,  B22F10/322 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

CPC classification number: B22F10/77 ,  B29C64/357 ,  B29C64/393 ,  B22F10/322 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

Abstract: A 3D printing apparatus to dehumidify and recycle a gas from a 3D printer is disclosed herein. The apparatus comprises: a gas inlet to receive a gas flow from a 3D printer, the gas flow comprising gas with evaporated solvents to be cleaned; a heat exchanger to dehumidify the gas flow from the evaporated solvents, the heat exchanger to cool the gas flow by heat transfer to a cold liquid stream from a chiller to saturate and condensate the solvents from the gas flow; a gas outlet to output the dehumidified gas flow back to the 3D printer; and a controller. The controller is to receive a humidity and temperature measurements from a sensor located downstream from the heat exchanger; compare the humidity and temperature measurements with a target humidity and a target temperature respectively; and control a chiller valve from the chiller based on the comparison to adjust the temperature of the gas flow to set an absolute humidity of the gas flow to a predeterminable value.

公开(公告)号：US11712851B2

公开(公告)日：2023-08-01

申请号：US17049589

申请日：2018-10-16

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Vicente Granados Asensio

IPC: B29C64/336 ,  B29C64/329 ,  B29C64/165 ,  B29C64/205 ,  B33Y30/00 ,  B33Y40/00

CPC classification number: B29C64/336 ,  B29C64/165 ,  B29C64/205 ,  B29C64/329 ,  B33Y30/00 ,  B33Y40/00

Abstract: In one example, a material dispensing apparatus comprises a plurality of material containers, wherein the plurality of material containers comprises a first set of material containers arranged to contain a first material and a second set of material containers arranged to contain a second, different, material, and each material container of the second set is located relative to a respective material container of the first set to form a pair of material containers. In use, the material dispensing apparatus is controllable to move across a build platform of an additive manufacturing system. Each of the plurality of material containers comprises an outlet mechanism that is independently controllable, relative to outlet mechanisms of others of the plurality of material containers, such that each pair of material containers selectively dispenses at least a portion of a respective amount of material onto a respective portion of the build platform as the material dispensing apparatus moves across the build platform, such that, collectively, the plurality of material containers forms a complete layer of material on the build platform as the material dispensing apparatus performs a single pass across the build platform.

公开(公告)号：US20220072795A1

公开(公告)日：2022-03-10

申请号：US17309925

申请日：2019-04-30

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

Inventor： Mohammad Jowkar ,  Rhys Mansell ,  Carmen Blasco Cortes

IPC: B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/165

Abstract: In an example, a method includes obtaining object model data describing at least a portion of an object to be generated by additive manufacturing. A color value of a first portion of the object to be generated may be determined, wherein the color value is based on a first color and a second color, different from the first color. Object generation data to generate the object using a fusing agent of the first color and a build material having the second color may be determined by defining a first region of a layer of build material to which fusing agent is to be applied defining a second region of the build material to which detailing agent is to be applied to define an edge of the object and defining a spacing region of build material to separate the first region and second region, wherein the spacing region is defined using parameters selected to provide the color value.

公开(公告)号：US11945168B2

公开(公告)日：2024-04-02

申请号：US17309925

申请日：2019-04-30

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

Inventor： Mohammad Jowkar ,  Rhys Mansell ,  Carmen Blasco Cortes

IPC: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: In an example, a method includes obtaining object model data describing at least a portion of an object to be generated by additive manufacturing. A color value of a first portion of the object to be generated may be determined, wherein the color value is based on a first color and a second color, different from the first color. Object generation data to generate the object using a fusing agent of the first color and a build material having the second color may be determined by defining a first region of a layer of build material to which fusing agent is to be applied defining a second region of the build material to which detailing agent is to be applied to define an edge of the object and defining a spacing region of build material to separate the first region and second region, wherein the spacing region is defined using parameters selected to provide the color value.

公开(公告)号：US11931961B2

公开(公告)日：2024-03-19

申请号：US17595204

申请日：2019-09-30

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

Inventor： Jorge Diosdado Borrego ,  Berta Carbonell Vilaplana ,  Rhys Mansell

IPC: B29C64/35 ,  B08B5/02 ,  B08B5/04 ,  B08B13/00 ,  B08B15/04 ,  B22F10/30 ,  B22F10/68 ,  B33Y40/20

CPC classification number: B29C64/35 ,  B08B5/02 ,  B08B5/023 ,  B08B5/04 ,  B08B5/043 ,  B08B13/00 ,  B08B15/04 ,  B22F10/30 ,  B22F10/68 ,  B33Y40/20

Abstract: According to one aspect, there is provided a method of cleaning a 3D object on a platform. The method comprises generating with a cleaning module a cleaning airflow to remove powder particles from a 3D object and an extraction airflow to extract any removed powder particles, determining a quantity of powder particles in the extraction airflow, and moving the cleaning module relative to the platform based on the determined quantity of powder particles.