Patents Assigned to Stratasys Ltd.
  • System for 3D printing
    Patent number: 11117310
    Abstract: An additive manufacturing (AM) system includes a carriage that deposits material in a defined pattern and a building platform that receives material deposited from the carriage. The carriage includes a pre-heating assembly with a plurality of pre-heating chambers and a printing block with a plurality of slots for receiving a plurality of printing heads. The carriage is equipped with more pre-heating chambers than head slots.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: September 14, 2021
    Assignee: Stratasys Ltd.
    Inventors: Gregory Brusilovski, Uri Grach, Boaz Max Perek
  • GPU MATERIAL ASSIGNMENT FOR 3D PRINTING USING 3D DISTANCE FIELDS
    Publication number: 20210279944
    Abstract: A system for generating slice data for additive manufacturing, comprises a graphics processing unit (GPU) that receives a digital model of an object in a three-dimensional build space defined over a plurality of slices, computes a three-dimensional signed distance field over voxels in the build space, assigns a building material to each voxel based on a respective distance field value, and generates slice data output pertaining to the building material assignments for each slice. The slice data output can be used for printing the object in layers corresponding to the slices. The distance field comprises one or more vector having a vertical component with respect to the slices.
    Type: Application
    Filed: May 25, 2021
    Publication date: September 9, 2021
    Applicant: Stratasys Ltd.
    Inventors: Blake Zachary COURTER, Stephen DEMAI
  • THREE-DIMENSIONAL INKJET PRINTING USING RING-OPENING METATHESIS POLYMERIZATION
    Publication number: 20210269663
    Abstract: Methods for fabricating three-dimensional objects by 3D-inkjet printing technology are provided. The methods utilize curable materials that polymerize via ring-opening metathesis polymerization (ROMP) in combination with toughening agents for fabricating the object. Systems suitable for performing these methods and kits containing modeling material formulations usable in the methods are also provided.
    Type: Application
    Filed: April 27, 2021
    Publication date: September 2, 2021
    Applicant: Stratasys Ltd.
    Inventors: Yuval VIDAVSKY, Lev KUNO
  • Method and system for building painted three-dimensional objects
    Patent number: 11104169
    Abstract: Methods of printing a three-dimensional object, layer by layer are provided. Layers are formed by a bulk inner region which may be formed by depositing a transparent material, a white material, a colored material or a combination thereof, and a color outline which includes voxels formed by depositing a colored building material.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: August 31, 2021
    Assignee: STRATASYS LTD.
    Inventor: Eliahu M. Kritchman
  • Rapid prototyping apparatus
    Patent number: 11104074
    Abstract: An apparatus, system and method for printing an object with a rapid prototyping machine (RPM) working in a computer network environment including one or more rapid prototyping RPMs, enables users in different locations to add objects to a virtual construction platform that is being prepared for printing via the computer network. Available space on the virtual construction platform for building the object may be communicated and instructions to add the model to the available space may be communicated via the network.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: August 31, 2021
    Assignee: Stratasys Ltd.
    Inventors: Chaim Kleinhendler, Tatyana Rodin Entin, Stanislav Shtilerman, Igal Zeitun
  • METHOD AND APPARATUS FOR PRINTING THREE-DIMENSIONAL (3D) OBJECTS
    Publication number: 20210260815
    Abstract: A method of printing a three-dimensional (3D) object and a support construction for the 3D object includes depositing a model material, layer-by-layer, on a fabrication platform, to print a first portion of the 3D object, and depositing a support material, layer-by-layer on the fabrication platform, to print the support construction, wherein, in a predetermined number of the deposited layers, the model material and the support material are deposited such that a gap is formed between a surface of the first portion of the 3D object and a surface of the support construction.
    Type: Application
    Filed: May 12, 2021
    Publication date: August 26, 2021
    Applicant: STRATASYS LTD.
    Inventors: Daniel DIKOVSKY, Eduardo NAPADENSKY, Shai HIRSCH, Evgeni LEVIN, Yoav BRESSLER
  • CONSUMPTION OF MATERIAL IN ADDITIVE MANUFACTURE
    Publication number: 20210260828
    Abstract: A method for carrying out additive manufacture while regulating material consumption, comprises making a digital representation of at least part of an object for printing, the representation comprising a plurality of voxels, and then identifying voxels which are flexible in respect of being able to consist of any one of at least two available materials. A balanced material consumption policy is then used to choose between the available materials so as to ensure that as far as possible, different materials are evenly used and wastage is minimized. Finally the object is printed with the selected materials.
    Type: Application
    Filed: May 7, 2021
    Publication date: August 26, 2021
    Applicant: Stratasys Ltd.
    Inventors: Avraham TEKEN, Boris BELOCON
  • Three-dimensional inkjet printing using ring-opening metathesis polymerization
    Patent number: 11097529
    Abstract: Methods for fabricating three-dimensional objects by 3D-inkjet printing technology are provided. The methods utilize curable materials that polymerize via ring-opening metathesis polymerization (ROMP) for fabricating the object. Systems suitable for performing these methods and kits containing modeling material formulations usable in the methods are also provided.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: August 24, 2021
    Assignee: Stratasys Ltd.
    Inventors: Yuval Vidavsky, Ira Yudovin-Farber
  • WATER-BREAKABLE FORMULATIONS AND ADDITIVE MANUFACTURING PROCESSES EMPLOYING SAME
    Publication number: 20210253766
    Abstract: Curable formulations which form cured materials that are breakable upon immersion in water are disclosed. The cured materials break into a plurality of particles being a few millimeters or less in size. Methods of fabricating three-dimensional objects utilizing the curable formulations are also disclosed, as well as model objects fabricated thereby. The curable formulations include at least a mono-functional curable material and a multi-functional curable material, as described in the specification.
    Type: Application
    Filed: April 28, 2021
    Publication date: August 19, 2021
    Applicant: Stratasys Ltd.
    Inventors: Tal ELY, Mariana POKRASS, Dani PERI, Avraham LEVY, Dana TENNE
  • Method and system for fabricating cross-layer pattern
    Patent number: 11090858
    Abstract: A method of fabricating a cross-layer pattern in a layered object is disclosed. The method is executed by an additive manufacturing system and comprises: dispensing a patterning material onto a receiving medium to form a first pattern element; dispensing a first layer of modeling material onto the first pattern element while forming a first open cavity exposing at least a portion of the first pattern element beneath the first layer; and dispensing patterning material onto the exposed portion of the first pattern element and the first layer to form a second pattern element contacting the first pattern element.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: August 17, 2021
    Assignee: Stratasys Ltd.
    Inventors: Daniel Dikovsky, Ira Yudovin-Farber, Efraim Dvash
  • WASTE DISPOSAL FOR ADDITIVE MANUFACTURE
    Publication number: 20210245440
    Abstract: A waste curing device to cure waste generated by an additive manufacturing system, the waste curing device comprising: a container for receiving the waste; a movable cover positioned above the container; one or more waste nozzles mounted on the moveable cover and configured to deliver waste into the container; a static cover positioned above the container and below the movable cover; one or more curing sources mounted on the static cover and configured to provide curing radiation to cure the waste in the container; wherein the movable cover is configured to move relative to the static cover to provide an open position for the waste nozzles to deliver waste into the container, and subsequently to a closed position, to shield the waste nozzles from curing radiation.
    Type: Application
    Filed: July 8, 2019
    Publication date: August 12, 2021
    Applicant: Stratasys Ltd.
    Inventors: Yaniv SHITRIT, Boris BELOCON, Gal BEGUN
  • Operation of printing nozzles in additive manufacture and apparatus for cleaning printing nozzles
    Patent number: 11084205
    Abstract: A method of providing nozzle calibration parameters for a 3D printer comprises: printing an arc pattern, printing an X-Y align pattern, and printing a head calibration pattern, measuring actual positions of drops, calculating deviations of said measured actual positions from expected positions, and calculating calibration parameters to correct for the deviations. Indicator drops may be used to allow built-in image recognition to find the calibration drops, and a cam system is provided to guide nozzle wipers.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: August 10, 2021
    Assignee: Stratasys Ltd.
    Inventors: Andrew James Carlson, Nathaniel Michael Peterson, Alexander Libinson, Adam Joseph Livingston, Scott Wayne Beaver
  • METHOD AND SYSTEM FOR SOLID FREEFORM FABRICATION
    Publication number: 20210221047
    Abstract: Methods of layerwise fabrication of a three-dimensional object, and objected obtained thereby are provided. The methods are effected by dispensing at least a first modeling formulation and a second modeling formulation to form a core region using both said first and said second modeling formulations, an inner envelope region at least partially surrounding said core region using said first modeling formulation but not said second modeling formulation, and an outer envelope region at least partially surrounding said inner envelope region using said second modeling formulations but not said first modeling formulation; and exposing said layer to curing energy, thereby fabricating the object, The first and second modeling formulations are selected such they differ from one another, when hardened, by at least one of Heat Deflection Temperature (HDT), Izod Impact resistance, Tg and elastic modulus.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Applicant: Stratasys Ltd.
    Inventor: Avraham LEVY
  • STRUCTURE SUPPORTING AN OBJECT DURING ADDITIVE MANUFACTURING AND METHOD FOR FORMING
    Publication number: 20210221045
    Abstract: A supporting structure built together with an object in an additive manufacturing (AM) process and configured to support an overhang of the object is described. The supporting structure includes a first array of pillars formed with a first material and reinforced with a second material. Each of the pillars in the first array includes a top. At least a portion of the tops in the first array adjoin and define a surface on which the overhang of the object may be supported. The first material is support material.
    Type: Application
    Filed: June 25, 2019
    Publication date: July 22, 2021
    Applicant: Stratasys Ltd.
    Inventors: Karin DEKEL, Blake Zachary COURTER
  • Rapid prototyping apparatus
    Patent number: 11065818
    Abstract: Apparatus for producing a three-dimensional model by sequentially forming layers of photopolymer material one on top of the other responsive to data defining the three-dimensional model is disclosed. The apparatus includes at least one printing head configured to dispense the photopolymer material, an array of LEDs controllable to provide radiation to polymerize the photopolymer material and a controller. The controller is configured to control the at least one printing head to dispense the photopolymer material to sequentially form the layers of material. The controller is also configured to turn on the array of LEDs to provide the radiation to cure the photopolymer material when situated above the model and to turn off the array of LEDs when not situated above the model.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: July 20, 2021
    Assignee: Stratasys Ltd.
    Inventors: Moshe Levi, Hanan Gothait, Eliahu M. Kritchman, Igal Zeitun
  • Coloring of three-dimensional printed objects
    Patent number: 11059282
    Abstract: A method of printing a three-dimensional (3D) color object, layer-by-layer, comprises: obtaining a 3D CAD specification defining a 3D geometry and a surface color distribution for the color object to be printed, defining regions on a surface of the color object; defining colors for each region based on the CAD specification; determining, using the 3D geometry of the specification, conditions applying at respective regions that are liable to cause color variation, such that using the colors as defined at the respective regions may give rise to a coloration error; selecting color corrections defined for respective determined conditions; correcting the defined colors; and printing the 3D color object with the color corrections.
    Type: Grant
    Filed: June 30, 2019
    Date of Patent: July 13, 2021
    Assignee: Stratasys Ltd.
    Inventors: Daniel Dikovsky, Stanislav Shtilerman, Yoav Bressler
  • Method and apparatus for additive manufacturing with powder material
    Patent number: 11059100
    Abstract: A system for building a three dimensional green compact comprising a printing station configured to print a mask pattern on a building surface, wherein the mask pattern is formed of solidifiable material; a powder delivery station configured to apply a layer of powder material on the mask pattern; a die compaction station for compacting the layer formed by the powder material and the mask pattern; and a stage configured to repeatedly advance a building tray to each of the printing station, the powder delivery station and the die compaction station to build a plurality of layers that together form the three dimensional green compact.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: July 13, 2021
    Assignee: Stratasys Ltd.
    Inventors: Yehoshua Sheinman, Shai Hirsch, Almog Shahar, Uri Grach, Kirill Tanhilevich
  • METHOD FOR PRINTING OF THREE-DIMENSIONAL OBJECTS
    Publication number: 20210206031
    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: March 8, 2021
    Publication date: July 8, 2021
    Applicant: STRATASYS LTD.
    Inventor: Eduardo NAPADENSKY
  • Waste disposal for 3D printing
    Patent number: 11046005
    Abstract: Additive manufacturing or 3D printing produces considerable quantities of waste ink or resin during the course of additive manufacture. The waste ink is a hazardous substance and must be collected and disposed of accordingly. The present embodiments provide a waste ink collection device that collects the waste ink from the printing process, or from head cleaning and other incidental operations, stores the waste and cures it. The waste ink is thus rendered safe for conventional disposal. A waste ink disposal cartridge collects the waste ink and carries out curing.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: June 29, 2021
    Assignee: Stratasys Ltd.
    Inventors: Scott Wayne Beaver, Andrew James Carlson, Adam Joseph Livingston
  • CATIONIC POLYMERIZABLE COMPOSITIONS AND METHODS OF USE THEREOF
    Publication number: 20210187822
    Abstract: An inkjet printing method and inkjet compositions are disclosed. The method includes selectively depositing by inkjet printing, layer by layer, a first composition and a second composition onto a receiving media from different dispensers to form polymerizable deposited layers. The first composition includes one or more free-radical polymerizable compounds and a cationic photoinitiator and is devoid of compounds able to undergo cationic photopolymerization within the first composition. The second composition includes one or more cationic polymerizable compounds and is devoid of cationic photoinitiators. At least one of the compositions includes a radical photoinitiator. The method further includes exposing the deposited layers to actinic radiation to initiate polymerization of the free-radical polymerizable compounds and the cationic polymerizable compounds within the deposited layers.
    Type: Application
    Filed: March 8, 2021
    Publication date: June 24, 2021
    Applicant: STRATASYS LTD.
    Inventors: Ira YUDOVIN-FARBER, Eduardo NAPADENSKY, Avi LEVY, Daniel DIKOVSKY