Patents by Inventor Eliahu M. Kritchman

Eliahu M. Kritchman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10399374
    Abstract: Methods of printing a three-dimensional object, layer by layer are provided. Layers are formed by printing a bulk region with a white building material; inkjet printing a circumferential region surrounding the bulk region that is part of an apparent colored surface of the three-dimensional object, the circumferential region includes colored voxels formed by depositing a transparent building material and one or more color additive materials and inkjet printing a transparent layer around the circumferential region.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: September 3, 2019
    Assignee: STRATASYS LTD.
    Inventor: Eliahu M. Kritchman
  • Publication number: 20190248139
    Abstract: A printing head assembly with integrated purge mechanism is disclosed. The printing head assembly comprises: (a) a liquid dispensing head comprising one or more dispensing nozzles enclosed in a nozzle plate, driven by at least first and second pressures, and (b) a shielding mask including an opening in front of the one or more nozzles, wherein the opening being configured such that when printing liquid is dispensed from the head driven by the first pressure, the liquid being dispensed in pulses through the opening in the shielding mask, and (ii) when purge printing liquid is dispensed from the head driven by the second pressure, the liquid being drawn to a capillary gap formed between the shielding mask and the nozzle plate thereby removing the purge printing liquid from the nearby nozzles.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Applicant: XJET LTD.
    Inventors: Eliahu M. KRITCHMAN, Ronen MIMON, Hanan GOTHAIT
  • Publication number: 20190232696
    Abstract: A printing device for dispending material on a heated substrate is provided. The device may include a printing head having one or more nozzles and a heat shield that partially masks a side of the printing head that faces the heated substrate when printing so as to reduce heat transfer from the substrate to the printing head. The shield includes a slot aligned with the one or more nozzles to enable passage of material from the one or more nozzles to the heated substrate.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 1, 2019
    Applicant: XJET LTD.
    Inventors: Eliahu M. KRITCHMAN, Hanan GOTHAIT, Yigal ROZVAL, MEIR DEBI
  • Patent number: 10335994
    Abstract: A method of printing a three-dimensional object is provided. The method includes selectively dispensing, layer by layer, one or more materials to form the three-dimensional object; selectively dispensing, layer by layer, one or more materials to form a support construction for the three-dimensional object; selectively dispensing, layer by layer, one or more materials to form a rigid exterior construction around at least part of the support construction, the rigid exterior having substantially similar strength and elasticity to the three-dimensional object; and forming a release construction around the rigid exterior construction, the release construction being between the rigid exterior construction and the three-dimensional object.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: July 2, 2019
    Assignee: STRATASYS LTD
    Inventors: Eduardo Napadensky, Eliahu M. Kritchman
  • Patent number: 10315427
    Abstract: A printing head assembly with integrated purge mechanism is disclosed. The printing head assembly comprises: (a) a liquid dispensing head comprising one or more dispensing nozzles enclosed in a nozzle plate, driven by at least first and second pressures, and (b) a shielding mask including an opening in front of the one or more nozzles, wherein the opening being configured such that when printing liquid is dispensed from the head driven by the first pressure, the liquid being dispensed in pulses through the opening in the shielding mask, and (ii) when purge printing liquid is dispensed from the head driven by the second pressure, the liquid being drawn to a capillary gap formed between the shielding mask and the nozzle plate thereby removing the purge printing liquid from the nearby nozzles.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: June 11, 2019
    Assignee: XJET LTD.
    Inventors: Eliahu M. Kritchman, Ronen Mimon, Hanan Gothait
  • Patent number: 10232655
    Abstract: A printing device for dispending material on a heated substrate is provided. The device may include a printing head having one or more nozzles and a heat shield that partially masks a side of the printing head that faces the heated substrate when printing so as to reduce heat transfer from the substrate to the printing head. The shield includes a slot aligned with the one or more nozzles to enable passage of material from the one or more nozzles to the heated substrate.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: March 19, 2019
    Assignee: XJET LTD.
    Inventors: Eliahu M. Kritchman, Hanan Gothait, Yigal Rozval, Meir Debi
  • Publication number: 20190047185
    Abstract: A method for preventing detachment of a three-dimensional object from a printing tray of a printing apparatus is disclosed. The method includes printing a carpet of building material below and around the base of a three-dimensional object to be printed; and printing said three-dimensional object. The portions of the carpet that protrude out of the boundaries of the base of the three-dimensional object are coated with one or more layers of support material to help keep the carpet flexible and adhesive in texture.
    Type: Application
    Filed: October 9, 2018
    Publication date: February 14, 2019
    Applicant: STRATASYS LTD.
    Inventors: Eliahu M. KRITCHMAN, Hanan GOTHAIT, Eduardo NAPADENSKY
  • Patent number: 10099406
    Abstract: A method for preventing detachment of a three-dimensional object from a printing tray of a printing apparatus is disclosed. The method includes printing a carpet of building material below and around the base of a three-dimensional object to be printed; and printing said three-dimensional object. The portions of the carpet that protrude out of the boundaries of the base of the three-dimensional object are coated with one or more layers of support material to help keep the carpet flexible and adhesive in texture.
    Type: Grant
    Filed: May 28, 2017
    Date of Patent: October 16, 2018
    Assignee: STRATASYS LTD
    Inventors: Dani Chechik, Avraham Teken, Eliahu M. Kritchman, Eduardo Napadensky
  • Patent number: 9962882
    Abstract: 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: Grant
    Filed: August 7, 2017
    Date of Patent: May 8, 2018
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, Igal Zeitun
  • Publication number: 20170334130
    Abstract: Methods of printing a three-dimensional object, layer by layer are provided. Layers are formed by printing a bulk region with a white building material; inkjet printing a circumferential region surrounding the bulk region that is part of an apparent colored surface of the three-dimensional object, the circumferential region includes colored voxels formed by depositing a transparent building material and one or more color additive materials and inkjet printing a transparent layer around the circumferential region.
    Type: Application
    Filed: August 10, 2017
    Publication date: November 23, 2017
    Applicant: STRATASYS LTD.
    Inventor: Eliahu M. KRITCHMAN
  • Publication number: 20170334131
    Abstract: 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: Application
    Filed: August 7, 2017
    Publication date: November 23, 2017
    Applicant: Stratasys Ltd.
    Inventors: Eliahu M. KRITCHMAN, Igal ZEITUN
  • Patent number: 9808994
    Abstract: System for controlling fabrication of three-dimensional objects, layer by layer are disclosed. The system includes a printing assembly having an irradiation unit and a printing head, the printing assembly is movable between a printing area and a service area. The system further includes a light sensor positioned at the service area to measure the output radiation power of the irradiation unit and a controller to receive information from the sensor and to automatically adjust the electrical power supplied to the irradiation unit.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: November 7, 2017
    Assignee: STRATASYS LTD.
    Inventors: Eliahu M. Kritchman, Alexander Libinson, Moshe Levi, Guy Menchik
  • Publication number: 20170259469
    Abstract: A method for preventing detachment of a three-dimensional object from a printing tray of a printing apparatus is disclosed. The method includes printing a carpet of building material below and around the base of a three-dimensional object to be printed; and printing said three-dimensional object. The portions of the carpet that protrude out of the boundaries of the base of the three-dimensional object are coated with one or more layers of support material to help keep the carpet flexible and adhesive in texture.
    Type: Application
    Filed: May 28, 2017
    Publication date: September 14, 2017
    Inventors: Dani CHECHIK, Avraham Teken, Eliahu M. Kritchman, Eduardo Napadensky
  • Publication number: 20170246851
    Abstract: 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: Application
    Filed: May 17, 2017
    Publication date: August 31, 2017
    Applicant: Stratasys Ltd.
    Inventors: Eliahu M. KRITCHMAN, Stanislav SHTILERMAN
  • Patent number: 9738033
    Abstract: A method for printing a three-dimensional objet, layer by layer is provided. The method involves printing an inner region of a layer of the three-dimensional object and an outer circumference region. The inner region includes a white outline area and the outer circumference region surrounds the white outline area. The outer circumference region that forms an apparent colored surface includes colored voxels formed by depositing a transparent building material and at least one color additive material and is printed such that the resolution of the color additive is higher than the building material resolution.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: August 22, 2017
    Assignee: STRATASYS LTD.
    Inventor: Eliahu M. Kritchman
  • Publication number: 20170225391
    Abstract: 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: Application
    Filed: April 27, 2017
    Publication date: August 10, 2017
    Applicant: Stratasys Ltd.
    Inventors: Eliahu M. KRITCHMAN, David ESHED, Guy MENCHIK
  • Patent number: 9724879
    Abstract: 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: Grant
    Filed: December 29, 2016
    Date of Patent: August 8, 2017
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, Eduardo Napadensky, Moshe Levi
  • Patent number: 9662838
    Abstract: 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: Grant
    Filed: August 25, 2015
    Date of Patent: May 30, 2017
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, David Eshed, Guy Menchik
  • Publication number: 20170106602
    Abstract: 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: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Applicant: Stratasys Ltd.
    Inventors: Eliahu M. KRITCHMAN, Eduardo NAPADENSKY, Moshe LEVI
  • Publication number: 20170095980
    Abstract: A printing head assembly with integrated purge mechanism is disclosed. The printing head assembly comprises: (a) a liquid dispensing head comprising one or more dispensing nozzles enclosed in a nozzle plate, driven by at least first and second pressures, and (b) a shielding mask including an opening in front of the one or more nozzles, wherein the opening being configured such that when printing liquid is dispensed from the head driven by the first pressure, the liquid being dispensed in pulses through the opening in the shielding mask, and (ii) when purge printing liquid is dispensed from the head driven by the second pressure, the liquid being drawn to a capillary gap formed between the shielding mask and the nozzle plate thereby removing the purge printing liquid from the nearby nozzles.
    Type: Application
    Filed: September 26, 2016
    Publication date: April 6, 2017
    Applicant: XJET LTD.
    Inventors: Eliahu M. KRITCHMAN, Ronen MIMON, Hanan GOTHAIT