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).

  • 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
  • Patent number: 9576079
    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: June 4, 2013
    Date of Patent: February 21, 2017
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, Eduardo Napadensky, Moshe Levi
  • Publication number: 20160229209
    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: April 18, 2016
    Publication date: August 11, 2016
    Applicant: XJET LTD.
    Inventors: Eliahu M. Kritchman, Hanan GOTHAIT, Yigal ROZVAL, Meir DEBI
  • Patent number: 9340016
    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: May 17, 2010
    Date of Patent: May 17, 2016
    Assignee: XJET LTD
    Inventors: Eliahu M. Kritchman, Hanan Gothait, Yigal Rozval, Meir Debi
  • Publication number: 20160114535
    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: Application
    Filed: January 7, 2016
    Publication date: April 28, 2016
    Inventors: Eliahu M. KRITCHMAN, Alexander LIBINSON, Moshe LEVI, Guy MENCHIK
  • Patent number: 9242411
    Abstract: Embodiments of the present invention are directed to a system and method for controlling fabrication of three-dimensional objects, layer by layer, the system comprising a printing assembly, including an irradiation unit and a printing head, the printing assembly is movable between a printing area and a service area. A light sensor positioned at the service area to measure output radiation power of the irradiation unit at a printing plane and a controller to receive information from the sensor and to automatically adjust electrical power supplied to the irradiation unit based on the information.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: January 26, 2016
    Assignee: STRATASYS LTD.
    Inventors: Eliahu M. Kritchman, Alexander Libinson, Moshe Levi, Guy Menchik
  • Publication number: 20150360417
    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: August 25, 2015
    Publication date: December 17, 2015
    Applicant: Stratasys Ltd.
    Inventors: Eliahu M. KRITCHMAN, David ESHED, Guy MENCHIK
  • Patent number: 9132587
    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: April 10, 2008
    Date of Patent: September 15, 2015
    Assignee: Stratasys Ltd.
    Inventors: David Eshed, Eliahu M. Kritchman, Guy Menchik
  • Publication number: 20150255632
    Abstract: Some aspects of the invention are related to a solar cell, for producing electricity from solar radiation. The solar cell may include a substrate, for example, polycrystalline silicon and an electrically conductive structure disposed on the substrate. The electrically conductive structure may include a bus bar and one or more finger electrodes positioned such that at least a portion of a finger electrode overlaps the bus bar.
    Type: Application
    Filed: May 28, 2013
    Publication date: September 10, 2015
    Applicant: Xjet Ltd.
    Inventors: Eliahu M. Kritchman, Ofir Baharav, Michael Dovrat, Lior Lavid, Hanan Gothait
  • Publication number: 20150224717
    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: Application
    Filed: April 27, 2015
    Publication date: August 13, 2015
    Inventor: Eliahu M. KRITCHMAN
  • Patent number: 9017589
    Abstract: A method for forming three dimensional objects is disclosed. The method includes printing building material, layer by layer, to form a three dimensional object on a printing tray by moving a printing block that comprises a printing head, at least two curing sources and a leveler in forward and reverse passages. The printing is done by moving the printing block in a forward passage when the distance between the printing block and the printing tray is such that the leveler does not touch a layer being built, adjusting a height position of the printing tray relative to the printing block prior to printing a reverse passage and moving the printing block in the reverse passage, wherein during the reserve passage the leveler touches and levels the layer being built.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: April 28, 2015
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, Eduardo Napadensky, Igal Zeytoun
  • Patent number: 9020627
    Abstract: generating an image data for cross sectional layers of the three-dimensional object, wherein the image data includes a first set of data for selectively printing building material at a first print resolution and a second set of data for printing one or more colored additives at a higher resolution and selectively depositing the building material and the one or more additives on successive layers based on the 2D image data to produce the three-dimensional object.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: April 28, 2015
    Assignee: Stratasys Ltd.
    Inventor: Eliahu M. Kritchman
  • Publication number: 20140339720
    Abstract: A three-dimensional printing system to print three-dimensional objects and a method of printed are disclosed. The system includes one or more printing heads, two or more cartridges, two or more sensors configured to determine the status of building material in the cartridges and a controller configured to receive data from the sensors and to control switching of building material supply from one cartridge to another. The printing method includes measuring data from two or more sensors to determine the status of the three-dimensional building material in the cartridges, controlling supply of the building material based on data received from the sensors and controlling switching of building material supply from one cartridge to another.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 20, 2014
    Inventors: Guy MENCHIK, Hanan GOTHAIT, Eliahu M. KRITCHMAN
  • Patent number: 8798780
    Abstract: A material supply apparatus for supplying printing materials to a printing system is provided. The apparatus includes a container to store printing material and a source of electromagnetic radiation to cure remnant printing material within the container. The printing system may be a three-dimensional printing system for producing three-dimensional objects.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: August 5, 2014
    Assignee: Stratasys Ltd.
    Inventors: Guy Menchik, Eliahu M. Kritchman
  • Patent number: 8781615
    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: Grant
    Filed: July 5, 2012
    Date of Patent: July 15, 2014
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, Slava Shtilerman
  • Publication number: 20140175706
    Abstract: A method for forming three dimensional objects is disclosed. The method includes printing building material, layer by layer, to form a three dimensional object on a printing tray by moving a printing block that comprises a printing head , at least two curing sources and a leveler in forward and reverse passages. The printing is done by moving the printing block in a forward passage when the distance between the printing block and the printing tray is such that the leveler does not touch a layer being built, adjusting a height position of the printing tray relative to the printing block prior to printing a reverse passage and moving the printing block in the reverse passage, wherein during the reserve passage the leveler touches and levels the layer being built.
    Type: Application
    Filed: January 28, 2014
    Publication date: June 26, 2014
    Applicant: STRATASYS LTD.
    Inventor: Eliahu M. Kritchman
  • Patent number: 8609204
    Abstract: A Solid Freeform Fabrication system, apparatus and method is provided, that includes a movable fabrication tray adapted to hold an object being fabricated; a depositing surface to hold deposited materials, and ink jet printing heads to selectively deposit a plurality of building materials on the depositing surface; wherein the deposited materials are merged to the object being fabricated, when said fabrication tray moves said object being fabricated to be in contact with said deposited materials.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: December 17, 2013
    Assignee: Stratasys Ltd.
    Inventor: Eliahu M. Kritchman
  • Publication number: 20130297063
    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: June 4, 2013
    Publication date: November 7, 2013
    Inventors: Eliahu M. KRITCHMAN, Eduardo NAPADENSKY
  • Publication number: 20130176355
    Abstract: A method for evaluating performance of a plurality of nozzles of a printing head includes repeatedly operating each of the nozzles to print test marks on a surface of a substrate, each of the test marks printed by that nozzle being printed at a different time. At least once during the repeated operation of each of the nozzles, at least some of the test marks are erased from the surface. The test marks that were printed by that nozzle are inspected for a feature that is indicative of the performance of that nozzle.
    Type: Application
    Filed: July 19, 2011
    Publication date: July 11, 2013
    Inventors: Eliahu M. Kritchman, Timofey Shmal
  • Patent number: 8469692
    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 21, 2012
    Date of Patent: June 25, 2013
    Assignee: Stratasys Ltd.
    Inventors: Eliahu M. Kritchman, Igal Zeytoun