公开(公告)号：WO2020027817A1

公开(公告)日：2020-02-06

申请号：PCT/US2018/044680

申请日：2018-07-31

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

Inventor： ROMAN, Justin M ,  OTIS JR., David R. ,  GEILE, John ,  SOSNOWSKI, Luke P.

IPC: B29C64/364 ,  B33Y40/00 ,  F24F6/02

Abstract: An example of an apparatus is provided. The apparatus includes a build material transport path to transport a build material with air flow. The apparatus includes a humidifying element to receive the air flow and to add moisture to the air flow. The apparatus includes an inlet to introduce ambient air into the build material transport path to decrease moisture content in the air flow. The apparatus includes a valve to connect the humidifying element and the inlet to the build material transport path. The valve is to adjust an amount of ambient air introduced into the build material transport path. The apparatus includes a sensor to detect the moisture content in the air flow and to generate a signal to indicate the moisture content. The apparatus includes a processor to receive the signal to control the valve to maintain a moisture content in the air flow.

公开(公告)号：WO2020023014A1

公开(公告)日：2020-01-30

申请号：PCT/US2018/043322

申请日：2018-07-23

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

Inventor： ARNOLD, Christopher John ,  PETERSON, Anders ,  GRANICH-YOUNG, Julien

IPC: B41J29/393 ,  B29C64/30 ,  B33Y40/00 ,  F17D5/02

Abstract: An example of a method involving monitoring a plurality of liquid connectors in a printing device. Each liquid connector of the plurality of liquid connectors may provide an indicator of a state of a connection. The connection is to deliver a print fluid. The method involves analyzing a plurality of indicators to determine whether a poor fluidic connection exists. In addition, the method further involves transmitting a command to stop a process when the poor fluidic connection exists.

公开(公告)号：WO2020023006A1

公开(公告)日：2020-01-30

申请号：PCT/US2018/043296

申请日：2018-07-23

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

Inventor： DUDA, Michael ,  ROMAN, Justin M. ,  SOSNOWSKI, Luke P.

IPC: B29C64/364 ,  B33Y40/00 ,  G05D22/00

Abstract: An example three-dimensional printer includes a humidity source, a build material reservoir, a conduit between the humidity source and the build material reservoir, an air source to transfer air from the humidity source through the conduit towards the build material reservoir, and a valve assembly connected to the conduit to control a flow of the air in the conduit while the printer enters an inactive mode of operation. The air source is to remain in an active mode of operation. The air source is controlled to transmit the air in the conduit until the air in the conduit adjacent to the build material reservoir reaches a temperature and relative humidity threshold.

公开(公告)号：WO2019245529A1

公开(公告)日：2019-12-26

申请号：PCT/US2018/038204

申请日：2018-06-19

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

Inventor： GONZALEZ MARTIN, Sergio ,  SHEPHERD, Matthew, A. ,  MANNARI, Kyle

IPC: B29C64/386 ,  B29C64/171

Abstract: In an example, a method includes receiving, at least one processor, object model data describing at least part of a three-dimensional object to be generated using additive manufacturing. A model type may be determined from the object model data by at least one processor. When the model type is a mesh model, a volumetric model describing at least part of the three-dimensional object in terms of a plurality of sub-volumes may be determined by at least one processor. When the model type is a volumetric model, the sub-volumes which represent a surface of the three-dimensional object may be determined by at least one processor.

公开(公告)号：WO2019194823A1

公开(公告)日：2019-10-10

申请号：PCT/US2018/026523

申请日：2018-04-06

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

Inventor： ROMAN, Justin M. ,  SOSNOWSKI, Luke ,  SORIANO, David ,  TOLOSA GONZALEZ, Emiliano Gabriel

IPC: B29C64/20 ,  B33Y30/00 ,  B29C64/393 ,  B33Y50/02 ,  B29C64/357

Abstract: A system for manufacturing three dimensional objects can include logic to detect, for at least one vessel, a moisture content level corresponding to a build material residing in the at least one vessel. The logic can also adjust a humidity level and a temperature of a gas and a conditioning agent applied to the at least one vessel, wherein the humidity level and the temperature are based on the moisture content level and a temperature of the build material residing in the at least one vessel. Additionally, the logic can initialize manufacturing a three dimensional object with the build material from the at least one vessel in response to detecting the moisture content level of the build material residing in the at least one vessel is within a predetermined range.

公开(公告)号：WO2019177643A1

公开(公告)日：2019-09-19

申请号：PCT/US2018/032020

申请日：2018-05-10

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

Inventor： SHAARAWI, Mohammed S. ,  MCKINNELL, James ,  CHAMPION, David A. ,  KASPERCHIK, Vladek P.

IPC: B22F7/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00

Abstract: An apparatus is disclosed to create a breakaway junction for 3D printed parts. Powder is spread along a target zone, such as a build bed. A liquid functional agent is selectively dispensed upon the powder to form a 3D object, a supporting part, and the breakaway junction between them.

公开(公告)号：WO2019152027A1

公开(公告)日：2019-08-08

申请号：PCT/US2018/016263

申请日：2018-01-31

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  UNIVERSIDADE FEDERAL DE PERNAMBUCO

Inventor： MELO, Sílvio De Barros ,  SIMÕES, Francisco Paulo Magalhães ,  TEICHRIEB, Veronica ,  HENRIQUES, Diogo Brandão Borborema ,  CORREIA, Walter Franklin Marques ,  BARROS, Gutenberg Xavier da Silva ,  TEIXEIRA, João Marcelo Xavier Natário ,  RISS, Marcelo ,  WHITE, Scott

IPC: G06T15/30 ,  G06T17/10

Abstract: According to examples, an apparatus may include a processor and a memory on which is stored machine readable instructions executable by the processor to: identify a slice height for direct slicing of a Non-Uniform Rational B-Spline (NURBS) model formed of surfaces by slicing planes. The instructions may cause the processor to slice the NURBS model to produce slices having the identified slice height and to adaptively subdivide surfaces of the NURBS model whose bounding boxes respectively intersect at least one of the slicing planes until the bounding boxes meet a predefined criterion. In addition, for each of the generated bounding boxes which meet the predefined criterion, the instructions may further cause the processor to determine sample points of the surface with which the bounding box corresponds and to store the sample points of the surfaces for printing.

公开(公告)号：WO2019147287A3

公开(公告)日：2019-08-01

申请号：PCT/US2018/015760

申请日：2018-01-29

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

Inventor： BARNES, Arthur, H. ,  YUSEF, Haseeb ,  GEILE, John

IPC: B29C64/153 ,  B29C64/295 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: Some examples include an additive manufacturing machine including a dose plate to receive build material onto, a heating element to selectively heat the build material dispensed on the dose plate, the build material selectively heated in at least two zones, a sensor to detect a temperature of each of the at least two zones, and a controller to control the heating element based on the temperatures of each of the at least two zones.

公开(公告)号：WO2019125464A1

公开(公告)日：2019-06-27

申请号：PCT/US2017/067891

申请日：2017-12-21

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

Inventor： OTIS, David R. Jr. ,  RINGWALD, Steve ,  SWIER, Kevin E.

IPC: B29C64/255 ,  B29C64/321 ,  B29C64/153 ,  B33Y30/00 ,  B33Y40/00

Abstract: A build device and a method of operating the build device are disclosed. In a method provided, a build material is directed to an intermediate vessel from a conveying line. The build material is separated from an air stream and dropped into the intermediate vessel. The intermediate vessel is emptied between a first build operation and a second build operation.

公开(公告)号：WO2019108199A1

公开(公告)日：2019-06-06

申请号：PCT/US2017/063933

申请日：2017-11-30

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

Inventor： OTIS, JR., David R. ,  SWIER, Kevin E. ,  FRANKS, Adam Peter

IPC: B29C64/10 ,  B29C64/321 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/357 ,  B33Y40/00

CPC classification number: B29C64/321 ,  B29C64/357 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02

Abstract: A varying a composition of build material used for a three dimensional (3D) part formed by a 3D printer are disclosed. In a system provided, a number of vessels for build material are included, wherein each vessel includes a feeder coupled to a conveying system. The conveying system conveys and blends build material from the vessels. A controller is configured to adjust a composition of the build material by adjusting an amount of material added from each of the vessels by controlling the feeder on each of the vessels.