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| Number | Title | Issue Date |
| 8105527 | Rapid prototyping and manufacturing system and method A stereolithography apparatus having a resin vat with resupply containers in one-way flow communication and a leveling container in two-way how communication, an automatic offload cart to remove and replace build support platforms, an elevator assembly for supportin... | 01/31/2012 |
| 7887316 | Selective laser sintering powder recycle system A method and apparatus for forming three-dimensional objects by laser sintering that includes the use of dense phase pneumatic conveying to internally recycle overflow powder, and to thoroughly blend overflow, recovered and virgin powder to provide a consistent powd... | 02/15/2011 |
| 7807947 | Laser sintering process chamber gas curtain window cleansing in a laser sintering system An inert gas dispenser for mounting to a process equipment functional window is provided to dispense an inert gas in a laminar flow at an effective velocity across the exposed surface to form a curtain of inert gas across the exposed surface to prevent a build-up of... | 10/05/2010 |
| 7790096 | Thermal management system for a removable build chamber for use with a laser sintering system A thermal management system is provided to control the preheating and cool down of a removable build chamber in a laser sintering system. A thermal management station controls preheating of a removable build chamber to heat the chamber to a temperature at or near th... | 09/07/2010 |
| 7785093 | Stereolithographic apparatus An improved stereolithography apparatus for forming three-dimensional objects using multiple chambered resin vats and a quick disconnect mounting system to permit concurrent use of multiple photopolymer build materials and easy change over of resin vats is disclosed... | 08/31/2010 |
| 7758799 | Edge smoothness with low resolution projected images for use in solid imaging A solid imaging apparatus and method employing sub-pixel shifting in multiple exposures of the digitally light projected image of a cross-section of a three-dimensional object on a solidifiable liquid medium. The multiple exposures provide increased resolution, pres... | 07/20/2010 |
| 7690909 | Rapid prototyping and manufacturing system and method A stereolithography apparatus having a resin vat with resupply containers in one-way flow communication and a leveling container in two-way flow communication, an automatic offload cart to remove and replace build support platforms, an elevator assembly for supporti... | 04/06/2010 |
| 7648664 | Clamped quantized feed system for solid freeform fabrication A material feed system for solid freeform fabrication. The build material is delivered in discrete or quantized amounts by a clamp feed system in a non-flowable state to the dispensing device and the material is then changed to a flowable state prior to being dispen... | 01/19/2010 |
| 7585450 | Rapid prototyping and manufacturing system and method A stereolithography apparatus having a resin vat with resupply containers in one-way flow communication and a leveling container in two-way flow communication, an automatic offload cart to remove and replace build support platforms, an elevator assembly for supporti... | 09/08/2009 |
| 7569174 | Controlled densification of fusible powders in laser sintering The invention relates to a method producing parts using laser sintering wherein a fusible powder is exposed to a plurality of laser scans at controlled energy levels and for time periods to melt and densify the powder and in the substantial absence of particle bondi... | 08/04/2009 |
| 7521652 | Controlled cooling methods and apparatus for laser sintering part-cake The invention is a method for controllably cooling at least a portion of a part-cake from a laser sintering system to minimize cool down time, maximize throughput, and minimize thermal gradients within the part-cake. The method generally comprises forming one or mor... | 04/21/2009 |
| 7520740 | Rapid prototyping and manufacturing system and method A stereolithography apparatus having a resin vat with resupply containers in one-way flow communication and a leveling container in two-way flow communication, an automatic offload cart to remove and replace build support platforms, an elevator assembly for supporti... | 04/21/2009 |
| 7427374 | Convection cooling techniques in selective deposition modeling A convection cooling technique for selective deposition modeling utilizing a venturi duct to establish a low-pressure port for drawing a second flow of air into the duct. The second flow of air is drawn across a heat generating component in the selective deposition ... | 09/23/2008 |
| 7378460 | Ultra-violet light curable hot melt composition A UV curable composition useful for three-dimensional inkjet printing comprising (i) at least one UV curable urethane (meth)acrylate resin; (ii) at least one wax; (iii) at least one (meth)acrylate diluent; (iv) at least one photoinitiator; and (v) at least one polym... | 05/27/2008 |
| 7361904 | UV water purification system A point of use water purifier for use in rural and under developed areas having a supply reservoir chamber in a first container and a treatment reservoir chamber in a second container underlying the first container and into which the first container is fitted, the w... | 04/22/2008 |
| 7296599 | Pneumatic powder transport system A method and apparatus for pneumatic powder transfer from a powder supply container to applications such as laser sintering systems. The method and apparatus use both constant and cyclic flows of a pressurized gas to fluidize and convey powders without the need for ... | 11/20/2007 |
| 7285237 | Post processing three-dimensional objects formed by selective deposition modeling A method for removing supports from a three-dimensional objected formed by selective deposition modeling. The three-dimensional object is formed from a curable phase change material and the supports are formed from a non-curable phase change material. The curable ph... | 10/23/2007 |
| 7270528 | Flash curing in selective deposition modeling A flash curing system for solid freeform fabrication which generates a plurality of radiation emitting pulses that forms a planar flash. The planar flash initiates curing of a curable material dispensed by a solid freeform fabrication apparatus. The radiation emitti... | 09/18/2007 |
| 7261541 | Cooling techniques in solid freeform fabrication A cooling system for removing heat from the layers of a three-dimensional object built in a layerwise manner from a build material in a solid freeform fabrication apparatus. The cooling system provides an air duct that delivers a uniform sheet of air flow over the l... | 08/28/2007 |
| 7176253 | Phase change support material composition A jettable non-curable support material composition useful for three-dimensional ink jet printing comprising at least one fatty alcohol and at least one abietic rosin ester alcohol, wherein the support material has a melting point between about 50° C. to about 65°... | 02/13/2007 |
| 7118206 | Gas bubble removal from ink-jet dispensing devices A method and apparatus for effectively removing gas bubbles in systems fed to ink-jetting devices. The system removes both small and large-scale gas bubbles from systems that feed materials to ink jet print heads. ... | 10/10/2006 |
| 7114943 | Post processor for three-dimensional objects A post processing apparatus for automated removal of support material from a three-dimensional objected formed from a build material by selective deposition modeling is provided. The apparatus includes a heated main chamber into which is placed the three-dimensional... | 10/03/2006 |
| 7077638 | Selective deposition modeling method and apparatus for forming three-dimensional objects and supports A variety of support structures and build styles for use in Rapid Prototyping and Manufacturing systems are described wherein particular emphasis is given to Thermal Stereolithography, Fused Deposition Modeling, and Selective Deposition Modeling systems, and wherein... | 07/18/2006 |
| 7074029 | Accumulation, control and accounting of fluid by-product from a solid deposition modeling process A by-product waste material removal system for solid deposition modeling. As excess build and support material is removed during the build as a by-product waste the removal system accumulates, measures, and releases the by-product waste material into a waste recepta... | 07/11/2006 |
| 7036550 | Infiltrated aluminum preforms A method for the manufacture of a three-dimensional object includes the steps of forming a mixture that contains a binder and a least one of aluminum or a first aluminum-base alloy into a green composite, removing the binder from said green composite, forming a poro... | 05/02/2006 |
| 7033160 | Convection cooling techniques in selective deposition modeling A convection cooling technique for selective deposition modeling utilizing a venturi duct to establish a low-pressure port for drawing a second flow of air into the duct. The second flow of air is drawn across a heat generating component in the selective deposition ... | 04/25/2006 |
| 7008206 | Ventilation and cooling in selective deposition modeling A ventilation and cooling system for a selective deposition modeling apparatus dispensing a curable material. The ventilation and cooling system captures airborne contaminants in the apparatus making the apparatus suitable for use in an office environment. A pressur... | 03/07/2006 |
| 6997232 | Infiltrated aluminum preforms A method for the manufacture of a three-dimensional object includes the steps of forming a mixture that contains a binder and a least one of aluminum or a first aluminum-base alloy into a green composite, removing the binder from said green composite, forming a poro... | 02/14/2006 |
| 6996245 | Detoxification of solid freeform fabrication materials A detoxification process for rendering three-dimensional objects formed by solid freeform fabrication techniques biocompatible for use in long-term dermal contact applications. The process nullifies cytotoxins normally present in objects formed by solid freeform fab... | 02/07/2006 |
| 6989225 | Stereolithographic resins with high temperature and high impact resistance A liquid radiation-curable composition that comprises (A) at least one polymerizing organic substance comprising a mixture of (1) at least one alicyclic epoxide having at least two epoxy groups; and | 01/24/2006 |
| 6930278 | Continuous calibration of a non-contact thermal sensor for laser sintering An apparatus and a method of using the apparatus wherein a radiation emitter is positioned adjacent a sensor apparatus within a process chamber in a laser sinter system that emits radiation to the sensor apparatus and a calibration apparatus receives readings from t... | 08/16/2005 |
| 6699424 | Method for forming three-dimensional objects A method of forming a three-dimensional object in layerwise fashion by selectively solidifying a build material. The method solidifies the main part area, delays or pauses for a desired period of time to permit shrinkage to occur, and then, in multiple dr... | 03/02/2004 |
| 6694207 | Selective laser sintering with interleaved fill scan A computer-controlled apparatus and method for fabricating three-dimensional articles in layerwise fashion is disclosed. Upon dispensing a layer of a fusible powder, a laser irradiates selected locations of that layer to fuse the powder into a cross-secti... | 02/17/2004 |
| 6677554 | Selective laser sintering with optimized raster scan direction A computer-controlled apparatus and method for fabricating three-dimensional articles in layerwise fashion is disclosed. Upon dispensing a layer of a fusible powder, a laser irradiates selected locations of that layer to fuse the powder into a cross-secti... | 01/13/2004 |
| 6678571 | Micro-slicing contour smoothing technique An improved slicing technique is disclosed that employs micro-slicing or intermediate slices by identifying intermediate triangle vertices in the STL data and passing slice layers through each intermediate vertex to create a final build object or part tha... | 01/13/2004 |
| 6660209 | Selective deposition modeling method and apparatus for forming three-dimensional objects and supports A variety of support structures and build styles for use in Rapid Prototyping and Manufacturing systems are described wherein particular emphasis is given to Thermal Stereolithography, Fused Deposition Modeling, and Selective Deposition Modeling systems, ... | 12/09/2003 |
| 6649113 | Method to reduce differential shrinkage in three-dimensional stereolithographic objects A method of forming a three-dimensional object in layerwise fashion by selectively solidifying a build material in a reinforced cyclical fashion. The method solidifies a first fully cured layer of build material and then partially solidifies at least one ... | 11/18/2003 |
| 6558606 | Stereolithographic process of making a three-dimensional object An improved stereolithographic process for forming three-dimensional objects using an improved support structure. The support structure is formed by using differential curing of the liquid media material to form solid supports with weak points at selected... | 05/06/2003 |
| 6532394 | Method and apparatus for data manipulation and system control in a selective deposition modeling system A method of manipulating data in a method for forming a three-dimensional object layer by layer from an ink jettable, solidifiable material by providing data corresponding to a plurality of polygons defining the outer surfaces of a plurality of three-demi... | 03/11/2003 |
| 6528613 | Phase change solid imaging material A solubilizing agent and a compound made by reacting selected nucleophiles, including fatty acid reactants and amines with an isocyanate are disclosed. The addition of the isocyanate and the different nucleophiles will create a di-urethane tetra-amide sol... | 03/04/2003 |
