Patents Assigned to Stratasys Ltd.
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Publication number: 20170334131Abstract: Apparatus for producing an object by sequentially forming thin layers of a construction material one on top of the other responsive to data defining the object, the apparatus comprising: a plurality of printing heads each having a surface formed with a plurality of output orifices and controllable to dispense the construction material through each orifice independently of the other orifices; a shuttle to which the printing heads are mounted; a support surface; and a controller adapted to control the shuttle to move back and forth over the support surface and as the shuttle moves to control the printing heads to dispense the construction material through each of their respective orifices responsive to the data to form a first layer on the support surface and thereafter, sequentially the other layers; wherein each printing head is dismountable from the shuttle and replaceable independently of the other printing heads.Type: ApplicationFiled: August 7, 2017Publication date: November 23, 2017Applicant: Stratasys Ltd.Inventors: Eliahu M. KRITCHMAN, Igal ZEITUN
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Publication number: 20170282452Abstract: A method of additive manufacturing of a three-dimensional object is disclosed. The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object. Each layer is formed by dispensing at least one modeling material to form an uncured layer, and curing the uncured layer by radiation. In various exemplary embodiments of the invention the method comprises, for at least one layer, forming a stack of sacrificial radiation-protective layers to cover an exposed portion of the layer, such that an upper layer of the stack remains exposed during formation of any subsequent layer of the plurality of layers.Type: ApplicationFiled: June 19, 2017Publication date: October 5, 2017Applicant: Stratasys Ltd.Inventors: Diana RAVICH, Eduardo NAPADENSKY
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Publication number: 20170259488Abstract: A method suitable for solid freeform fabrication is disclosed. The method comprises mixing respective amounts of a plurality of materials such as to provide a building material characterized by at least one attribute, and using the building material for fabricating a three-dimensional object.Type: ApplicationFiled: May 29, 2017Publication date: September 14, 2017Applicant: Stratasys Ltd.Inventor: Eduardo NAPADENSKY
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Publication number: 20170246851Abstract: A method of producing an object by sequentially printing layers of construction material one on top of the other, the method comprising: providing the construction material at a first lower temperature; flowing the construction material through a heated flow path in a flow structure to heat the construction material and delivering the heated construction material to a heated reservoir in a printing head; and dispensing the heated construction material from the reservoir to build the object layer by layer.Type: ApplicationFiled: May 17, 2017Publication date: August 31, 2017Applicant: Stratasys Ltd.Inventors: Eliahu M. KRITCHMAN, Stanislav SHTILERMAN
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Publication number: 20170225391Abstract: A scanning 3-D printing system comprises a printing platform movable in a printing direction and in an indexing direction, the printing platform comprising a printing head configured for dispensing building material while the printing platform is moving in a printing direction one pass at a time, and layer by layer, a roller configured for leveling the dispensed building material one pass at a time, wherein the roller is rotatably mounted on a roller axle, and wherein the roller axle extends over all passes of the printing system and is stationary in the indexing direction, a scraper configured for scraping excess building material off the roller, and a trough configured for collecting the building material scraped off the roller.Type: ApplicationFiled: April 27, 2017Publication date: August 10, 2017Applicant: Stratasys Ltd.Inventors: Eliahu M. KRITCHMAN, David ESHED, Guy MENCHIK
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Publication number: 20170225390Abstract: A method of additive manufacturing of a three-dimensional object is disclosed. The method comprises sequentially forming a plurality of layers each patterned according to the shape of a cross section of the object. In some embodiments, the formation of at least one of the layers comprises performing a raster scan to dispense at least a first building material composition, and a vector scan to dispense at least a second building material composition. The vector scan is optionally along a path selected to form at least one structure selected from the group consisting of (i) an elongated structure, (ii) a boundary structure at least partially surrounding an area filled with the first building material, and (iii) an inter-layer connecting structure.Type: ApplicationFiled: April 24, 2017Publication date: August 10, 2017Applicant: Stratasys Ltd.Inventor: Eduardo NAPADENSKY
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Patent number: 9724879Abstract: Apparatus for producing an object by sequentially forming thin layers of a construction material one on top of the other responsive to data defining the object, the apparatus comprising: a plurality of printing heads each having a surface formed with a plurality of output orifices and controllable to dispense the construction material through each orifice independently of the other orifices; a shuttle to which the printing heads are mounted; a support surface; and a controller adapted to control the shuttle to move back and forth over the support surface and as the shuttle moves to control the printing heads to dispense the construction material through each of their respective orifices responsive to the data to form a first layer on the support surface and thereafter, sequentially the other layers; wherein each printing head is dismountable from the shuttle and replaceable independently of the other printing heads.Type: GrantFiled: December 29, 2016Date of Patent: August 8, 2017Assignee: Stratasys Ltd.Inventors: Eliahu M. Kritchman, Eduardo Napadensky, Moshe Levi
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Patent number: 9718238Abstract: A printing head for a printing system is disclosed. The printing head comprises a plurality of compartments, each having an outlet port for depositing liquid and an inlet port separately connectable to a separate liquid container. At least two compartments are in controllable fluid communication with each other, and the printing head comprises an arrangement of sensors configured for generating signals indicative of (i) a filling state of each compartment, and (ii) a fluid communication state between the at least two compartments.Type: GrantFiled: March 4, 2013Date of Patent: August 1, 2017Assignee: Stratasys Ltd.Inventors: Avraham Teken, Moshe Aknin, Gregory Brusilovski
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Patent number: 9688021Abstract: A method of additive manufacturing of a three-dimensional object is disclosed. The method comprises sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object. Each layer is formed by dispensing at least one modeling material to form an uncured layer, and curing the uncured layer by radiation. In various exemplary embodiments of the invention the method comprises, for at least one layer, forming a stack of sacrificial radiation-protective layers to cover an exposed portion of the layer, such that an upper layer of the stack remains exposed during formation of any subsequent layer of the plurality of layers.Type: GrantFiled: November 28, 2011Date of Patent: June 27, 2017Assignee: Stratasys Ltd.Inventors: Diana Ravich, Eduardo Napadensky
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Patent number: 9662838Abstract: A scanning 3-D printing system comprises a printing platform movable in a printing direction and in an indexing direction, the printing platform comprising a printing head configured for dispensing building material while the printing platform is moving in a printing direction one pass at a time, and layer by layer, a roller configured for leveling the dispensed building material one pass at a time, wherein the roller is rotatably mounted on a roller axle, and wherein the roller axle extends over all passes of the printing system and is stationary in the indexing direction, a scraper configured for scraping excess building material off the roller, and a trough configured for collecting the building material scraped off the roller.Type: GrantFiled: August 25, 2015Date of Patent: May 30, 2017Assignee: Stratasys Ltd.Inventors: Eliahu M. Kritchman, David Eshed, Guy Menchik
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Patent number: 9662834Abstract: A method of producing an object by sequentially printing layers of construction material one on top of the other, the method comprising: providing the construction material at a first lower temperature; flowing the construction material through a heated flow path in a flow structure to heat the construction material and delivering the heated construction material to a heated reservoir in a printing head; and dispensing the heated construction material from the reservoir to build the object layer by layer.Type: GrantFiled: July 14, 2014Date of Patent: May 30, 2017Assignee: Stratasys Ltd.Inventor: Stanislav Shtilerman
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Patent number: 9662839Abstract: A method suitable for solid freeform fabrication is disclosed. The method comprises mixing respective amounts of a plurality of materials such as to provide a building material characterized by at least one attribute, and using the building material for fabricating a three-dimensional object.Type: GrantFiled: July 2, 2012Date of Patent: May 30, 2017Assignee: Stratasys Ltd.Inventor: Eduardo Napadensky
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Patent number: 9649811Abstract: A method of additive manufacturing of a three-dimensional object is disclosed. The method comprises sequentially forming a plurality of layers each patterned according to the shape of a cross section of the object. In some embodiments, the formation of at least one of the layers comprises performing a raster scan to dispense at least a first building material composition, and a vector scan to dispense at least a second building material composition. The vector scan is optionally along a path selected to form at least one structure selected from the group consisting of (i) an elongated structure, (ii) a boundary structure at least partially surrounding an area filled with the first building material, and (iii) an inter-layer connecting structure.Type: GrantFiled: April 17, 2012Date of Patent: May 16, 2017Assignee: Stratasys Ltd.Inventor: Eduardo Napadensky
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Publication number: 20170106602Abstract: Apparatus for producing an object by sequentially forming thin layers of a construction material one on top of the other responsive to data defining the object, the apparatus comprising: a plurality of printing heads each having a surface formed with a plurality of output orifices and controllable to dispense the construction material through each orifice independently of the other orifices; a shuttle to which the printing heads are mounted; a support surface; and a controller adapted to control the shuttle to move back and forth over the support surface and as the shuttle moves to control the printing heads to dispense the construction material through each of their respective orifices responsive to the data to form a first layer on the support surface and thereafter, sequentially the other layers; wherein each printing head is dismountable from the shuttle and replaceable independently of the other printing heads.Type: ApplicationFiled: December 29, 2016Publication date: April 20, 2017Applicant: Stratasys Ltd.Inventors: Eliahu M. KRITCHMAN, Eduardo NAPADENSKY, Moshe LEVI
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Patent number: 9576079Abstract: Apparatus for producing an object by sequentially forming thin layers of a construction material one on top of the other responsive to data defining the object, the apparatus comprising: a plurality of printing heads each having a surface formed with a plurality of output orifices and controllable to dispense the construction material through each orifice independently of the other orifices; a shuttle to which the printing heads are mounted; a support surface; and a controller adapted to control the shuttle to move back and forth over the support surface and as the shuttle moves to control the printing heads to dispense the construction material through each of their respective orifices responsive to the data to form a first layer on the support surface and thereafter, sequentially the other layers; wherein each printing head is dismountable from the shuttle and replaceable independently of the other printing heads.Type: GrantFiled: June 4, 2013Date of Patent: February 21, 2017Assignee: Stratasys Ltd.Inventors: Eliahu M. Kritchman, Eduardo Napadensky, Moshe Levi
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Publication number: 20160342149Abstract: A method of three-dimensional fabrication of an object is disclosed. The method comprises: forming a plurality of layers in a configured pattern corresponding to the shape of the three-dimensional object, at least one layer of the plurality of layers being formed at a predetermined and different thickness selected so as to compensate for post-formation shrinkage of the layer along a vertical direction. In various exemplary embodiments of the invention spread of building material of one or more layers is diluted at least locally such as to maintain a predetermined thickness and a predetermined planar resolution for the layer.Type: ApplicationFiled: August 3, 2016Publication date: November 24, 2016Applicant: Stratasys Ltd.Inventor: Eduardo NAPADENSKY
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Patent number: 9417627Abstract: A method of three-dimensional fabrication of an object is disclosed. The method comprises: forming a plurality of layers in a configured pattern corresponding to the shape of the three-dimensional object, at least one layer of the plurality of layers being formed at a predetermined and different thickness selected so as to compensate for post-formation shrinkage of the layer along a vertical direction. In various exemplary embodiments of the invention spread of building material of one or more layers is diluted at least locally such as to maintain a predetermined thickness and a predetermined planar resolution for the layer.Type: GrantFiled: July 13, 2014Date of Patent: August 16, 2016Assignee: Stratasys Ltd.Inventor: Eduardo Napadensky
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Publication number: 20160107383Abstract: A method of layerwise solid freeform fabrication is disclosed. The method comprises, for each of at least a few of the layers, dispensing and hardening at least a first modeling material and a second modeling material to form a core region and one or more envelope regions at least partially surrounding the core region. In some embodiments, the ratio between the elastic moduli of adjacent regions, when hardened, is from about 1 to about 20.Type: ApplicationFiled: December 31, 2015Publication date: April 21, 2016Applicant: Stratasys Ltd.Inventors: Daniel DIKOVSKY, Avraham LEVY, Eduardo NAPADENSKY
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Patent number: 9227365Abstract: A method of layerwise solid freeform fabrication is disclosed. The method comprises, for each of at least a few of the layers, dispensing and hardening at least a first modeling material and a second modeling material to form a core region and one or more envelope regions at least partially surrounding the core region. In some embodiments, the ratio between the elastic moduli of adjacent regions, when hardened, is from about 1 to about 20.Type: GrantFiled: April 21, 2011Date of Patent: January 5, 2016Assignee: Stratasys Ltd.Inventors: Daniel Dikovsky, Avraham Levy, Eduardo Napadensky
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Publication number: 20150360417Abstract: A scanning 3-D printing system comprises a printing platform movable in a printing direction and in an indexing direction, the printing platform comprising a printing head configured for dispensing building material while the printing platform is moving in a printing direction one pass at a time, and layer by layer, a roller configured for leveling the dispensed building material one pass at a time, wherein the roller is rotatably mounted on a roller axle, and wherein the roller axle extends over all passes of the printing system and is stationary in the indexing direction, a scraper configured for scraping excess building material off the roller, and a trough configured for collecting the building material scraped off the roller.Type: ApplicationFiled: August 25, 2015Publication date: December 17, 2015Applicant: Stratasys Ltd.Inventors: Eliahu M. KRITCHMAN, David ESHED, Guy MENCHIK