Patents Assigned to Stratasys, Inc.
  • Semi-crystalline build materials
    Patent number: 10144828
    Abstract: A polymeric material includes a semi-crystalline polymer and a secondary material wherein when the secondary material is combined with the semi-crystalline polymer to form a blend having at least a 3° C. reduction in a hot crystallization temperature relative to the neat semi-crystalline polymer.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: December 4, 2018
    Assignee: Stratasys, Inc.
    Inventors: Luke M. B. Rodgers, Vittorio L. Jaker
  • Liquefier assembly with multiple-zone plate heater assembly
    Patent number: 10131131
    Abstract: A liquefier assembly for use in an additive manufacturing system, which includes a rigid member having a gap, a liquefier tube operably disposed in the gap, one or more heater assemblies disposed in the gap in contact with the liquefier tube, and configured to heat the liquefier tube in a zone-by-zone manner, preferably one or more thermal resistors disposed in the gap between the rigid member and the heater assemblies, and preferably one or more sensors configured to operably measure pressure within the liquefier tube. The one or more heater assemblies may be operated to provide dynamic heat flow control.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: November 20, 2018
    Assignee: Stratasys, Inc.
    Inventors: J. Samuel Batchelder, William J. Swanson, Kevin C. Johnson
  • Liquefier assembly for additive manufacturing systems, and methods of use thereof
    Patent number: 10124539
    Abstract: A liquefier assembly for use in an additive manufacturing system, which includes a rigid member having a gap, a liquefier tube operably disposed in the gap, one or more heater assemblies disposed in the gap in contact with the liquefier tube, and configured to heat the liquefier tube in a zone-by-zone manner, preferably one or more thermal resistors disposed in the gap between the rigid member and the heater assemblies, and preferably one or more sensors configured to operably measure pressure within the liquefier tube. The one or more heater assemblies may be operated to provide dynamic heat flow control.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: November 13, 2018
    Assignee: Stratasys, Inc.
    Inventors: J. Samuel Batchelder, William J. Swanson, Kevin C. Johnson
  • Three-dimensional parts having interconnected Hollow patterns, method of manufacturing and method of producing composite part
    Patent number: 10093039
    Abstract: A three-dimensional part is printed using an additive manufacturing technique. The three-dimensional part includes an outer wall having an outer surface defining a shape of a part and in interior surface defining an interior cavity. The part includes a plurality of first sections having a plurality of printed layers, each printed layer of the first section having a plurality of wall segments that form triangle shaped cells wherein each of the plurality of first sections are attached to the interior surface of the outer wall.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: October 9, 2018
    Assignee: Stratasys, Inc.
    Inventors: Subramaniam Jayanti, Erik K. Heide, Donald J. Holzwarth, Thomas James Studanski, Alissa Ann Wild, Kevin C. Johnson
  • Self-supporting internal passageways for powder metal additive manufacturing
    Patent number: 10089416
    Abstract: An additive manufacturing process for building a three-dimensional part, which includes applying a layer of one or more powder-based metals onto or over a substrate, selectively melting and/or sintering the powder-based metals to produce a layer of the three-dimensional part, and repeating these steps such that the built three-dimensional part includes one or more self-supporting internal passageways, and which preferably precludes the need for internal support structures for the internal passageways.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: October 2, 2018
    Assignee: Stratasys, Inc.
    Inventors: William Cody DuBose, Frederick Carl Claus, Andrew Carter, Bryan Joshua Lee Bedal
  • Ceramic support structure
    Patent number: 10059031
    Abstract: A pre-ceramic support structure for additive manufacturing, that upon thermal processing, is soluble in various solvents.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: August 28, 2018
    Assignee: Stratasys, Inc.
    Inventors: Benjamin A. Demuth, Adam R. Pawloski
  • Break-away support material for additive manufacturing
    Patent number: 10059053
    Abstract: A support material for use in an additive manufacturing system to print a support structure for a three-dimensional part. The support material includes a base resin that is substantially miscible with a part material used to print the three-dimensional part, and has a glass transition temperature within about 10° C. of a glass transition temperature of the part material. The support material also includes a dispersed resin that is substantially immiscible with the base resin, where the base resin and the dispersed resin are each thermally stable for use in the additive manufacturing system in coordination with the part material.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: August 28, 2018
    Assignee: Stratasys, Inc.
    Inventors: Vittorio L. Jaker, Luke M. B. Rodgers
  • Surface angle model evaluation process for additive manufacturing
    Patent number: 10046522
    Abstract: A method for printing a three-dimensional part in an additive manufacturing process, which includes calculating surface plane angles relative to one or more of the coordinate axes as a function of surface area of the surface geometry, calculating a build score for each coordinate axis as a function of the calculated surface plane angles, and selecting an orientation for the digital model in the coordinate system based at least in part on the calculated build scores. The build scores preferably predict which part orientations are likely to provide good surface quality for the printed three-dimensional part.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: August 14, 2018
    Assignee: Stratasys, Inc.
    Inventors: Jacob David Lynch August, William J. Swanson, Kevin Johnson
  • Additive manufacturing system with extended printing volume, and methods of use thereof
    Patent number: 10035306
    Abstract: An additive manufacturing system for printing three-dimensional parts, the system comprising a heatable chamber with a port, a print foundation, a print head configured to print a three-dimensional part onto the print foundation in a layer-by-layer manner along a printing axis, and a drive mechanism configured to index the print foundation along the printing axis such that, while the print head prints the three-dimensional part, the print foundation and at least a portion of the three-dimensional part pass through the port and out of the heated chamber.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 31, 2018
    Assignee: Stratasys, Inc.
    Inventors: S. Scott Crump, Dominic F. Mannella, William J. Swanson, Kevin C. Johnson, Ronald G. Schloesser
  • Print head nozzle for use with additive manufacturing system
    Patent number: 10029415
    Abstract: A nozzle for printing three-dimensional parts with an additive manufacturing system, the nozzle comprising a nozzle body having an inlet end and a tip end offset longitudinally from the inlet end, a tip pipe for extruding a flowable material, an inner ring extending circumferentially around the tip pipe at the outlet end, an outer ring extending circumferentially around the inner ring, at least one annular recessed groove located circumferentially between the inner ring and the outer ring.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: July 24, 2018
    Assignee: Stratasys, Inc.
    Inventors: William J. Swanson, Dominic F. Mannella, Kevin C. Johnson, Ronald G. Schloesser
  • Semi-crystalline build materials
    Patent number: 10023739
    Abstract: A polymeric material includes a semi-crystalline polymer and a secondary material wherein when the secondary material is combined with the semi-crystalline polymer to form a blend having an enthalpy that is between about 2 J/g heat of fusion and about 80% of the heat of fusion of the neat semi-crystalline material, as measured by differential scanning calorimetry (DSC) when cooling from a melting temperature to a hot crystalline temperature at a rate of 10° C./min.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: July 17, 2018
    Assignee: Stratasys, Inc.
    Inventors: Luke M. B. Rodgers, Vittorio L. Jaker
  • Ceramic support structure
    Patent number: 10022889
    Abstract: A feedstock material for use as a support material in an additive manufacturing system includes a pre-ceramic material in powder form. The preceramic material comprises calcium carbonate, sodium carbonate, sodium aluminate or combinations thereof. The feedstock material includes a thermoplastic binder having the pre-ceramic material dispersed therein, wherein the pre-ceramic material and the thermoplastic binder are in a filament form. The filament is configured to be melted and extruded to form a support structure for a ceramifable article in a layer by layer manner, wherein the pre-ceramic material is at least about 50% of the feedstock material.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: July 17, 2018
    Assignee: Stratasys, Inc.
    Inventors: Benjamin A. Demuth, Adam R. Pawloski
  • Support structure removal system
    Patent number: 10016945
    Abstract: A support structure removal system comprising a vessel and a second component. The vessel comprises a vessel body, a porous floor configured to retain a three-dimensional part, and an impeller rotatably mounted below the porous floor. The second component comprises a surface configured to operably receive the vessel, and a rotation-inducing assembly located below the surface, where the rotation-inducing assembly is configured to rotate the impeller with magnetic fields when the vessel is received on the surface of the second component to agitate and direct flows of an aqueous fluid through the porous floor.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: July 10, 2018
    Assignee: Stratasys, Inc.
    Inventors: William J. Swanson, Dominic F. Mannella, Ronald G. Schloesser
  • Core-shell morphology of composite filaments for use in extrusion-based additive manufacturing systems
    Patent number: 10011922
    Abstract: A consumable filament for use in an extrusion-based additive manufacturing system, where the consumable filament comprises a core portion of a matrix of a first base polymer and particles dispersed within the matrix, and a shell portion comprising a same or a different base polymer. The consumable filament is configured to be melted and extruded to form roads of a plurality of solidified layers of a three-dimensional part, and where the roads at least partially retain cross-sectional profiles corresponding to the core portion and the shell portion of the consumable filament and retain the particles within the roads of the printed part and do not penetrate the outer surface of the shell portion.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: July 3, 2018
    Assignee: Stratasys, Inc.
    Inventors: Christopher Scott Graley, Christine Lawrence Sumerel, James E. Orrock
  • Part material for electrophotography-based additive manufacturing
    Patent number: 9933718
    Abstract: A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a copolymer (including acrylonitrile units, butadiene units, and aromatic units), a charge control agent, and a heat absorber. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: April 3, 2018
    Assignee: Stratasys, Inc.
    Inventor: Trevor I. Martin
  • Method for printing three-dimensional items wtih semi-crystalline build materials
    Patent number: 9925714
    Abstract: A method for printing a three-dimensional part with an additive manufacturing system includes providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials, wherein the consumable feedstock material has a process window in which crystalline kinetics are either accelerated or retarded. The consumable feedstock material is melted in the additive manufacturing system. At least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: March 27, 2018
    Assignee: Stratasys, Inc.
    Inventors: Luke M. B. Rodgers, Vittorio L. Jaker
  • Method for printing three-dimensional parts with part strain orientation
    Patent number: 9925725
    Abstract: A method and program for printing a three-dimensional part with an additive manufacturing system, the method including generating or otherwise providing strain data from a digital model of the three-dimensional part, orienting the digital model to align the directions of high tensile strain in a build plane, and printing the three-dimensional part in a layer-by-layer manner based on the oriented digital model with the additive manufacturing system.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: March 27, 2018
    Assignee: Stratasys, Inc.
    Inventor: J. Samuel Batchelder
  • Registration and overlay error correction of electrophotographically formed elements in an additive manufacturing system
    Patent number: 9919479
    Abstract: In a method for printing a three-dimensional (3D) parts with an additive manufacturing system, a developed layer of an electrically charged powder material is produced on a transfer medium using an electrophotographic (EP) engine. The transfer medium and the developed layer are fed in a feed direction. A position of the developed layer on the transfer medium is detected using a first sensor having a first output that indicates the position. A position of a moveable build platform is adjusted relative to the transfer medium to reduce one or more overlay errors between the developed layer and an intermediate build surface of a three-dimensional structure retained on the moveable build platform based on the first output. The developed layer is transferred to the intermediate build surface using a pressing element.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: March 20, 2018
    Assignee: Stratasys, Inc.
    Inventors: James Baecker, J. Samuel Batchelder
  • Layer transfusion with transfixing for additive manufacturing
    Patent number: 9904223
    Abstract: An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: February 27, 2018
    Assignee: Stratasys, Inc.
    Inventors: Steven A. Chillscyzn, James W. Comb, William J. Hanson, J. Randolph Sanders, Michael W. Bacus
  • Pet chew
    Patent number: D835383
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: December 11, 2018
    Assignee: Stratasys, Inc.
    Inventor: Troy Petersen