Patents by Inventor Dmitri Megretski
Dmitri Megretski 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).
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Techniques for producing a flat film surface in additive fabrication and related systems and methods
Patent number: 11878467Abstract: Techniques for producing a flat film surface in additive fabrication are provided. According to some aspects, a movable stage may be arranged beneath a container having a base that includes a flexible film. The movable stage may include a segmented member in which a number of segments are aligned along a common axis. The segmented member may maintain contact with the flexible film as the movable stage moves beneath the container, with the segmented member producing a flat surface of the flexible film, at least within a region above the movable stage. According to some embodiments, multiple segmented members may be provided within the movable stage, such as in parallel with one another.Type: GrantFiled: May 31, 2019Date of Patent: January 23, 2024Assignee: Formlabs, Inc.Inventors: Shane Wighton, Maxim Lobovsky, Robert Joachim, Jack Moldave, Adam Damiano, Christian Reed, Dmitri Megretski, Benjamin FrantzDale -
Publication number: 20230182390Abstract: A method includes curing a photopolymer resin disposed between a first build surface and a flexible film layer to form a print layer of a printed part. Here, the print layer of the printed part defines a second build surface attached to the flexible film layer. The method also includes translating a peeling mechanism between the second build surface and the flexible film layer to detach the flexible film layer from the second build surface.Type: ApplicationFiled: December 7, 2022Publication date: June 15, 2023Applicant: Formlabs Inc.Inventors: Dmitri Megretski, Benjamin FrantzDale, Jacob Sanchez, Alec Rudd
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Publication number: 20230078198Abstract: Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.Type: ApplicationFiled: July 18, 2022Publication date: March 16, 2023Applicant: Formlabs, Inc.Inventors: Maxim Lobovsky, Shane Wighton, Dmitri Megretski, Adam Damiano
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Publication number: 20220362998Abstract: According to some aspects, an additive fabrication apparatus is provided configured to form layers of material on a build platform, each layer of material being formed so as to contact a supporting liquid or a film disposed within a container, in addition to the build platform, a liquid photopolymer, and/or a previously formed layer of a material. The additive fabrication apparatus may comprise a container and a leveling element, wherein the leveling element is configured to move across a liquid-liquid interface to promote or create a flat interface between the two liquids. According to some aspects, the additive fabrication comprises a film disposed between two liquids, wherein the film maintains or provides a flat surface at the interface of the two liquids.Type: ApplicationFiled: March 31, 2022Publication date: November 17, 2022Applicant: Formlabs, Inc.Inventors: Adam Damiano, Dmitri Megretski, Shane Wighton, Maxim Lobovsky
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Publication number: 20220258414Abstract: A multi-component print surface and associated additive manufacturing methods are generally described.Type: ApplicationFiled: February 15, 2022Publication date: August 18, 2022Applicant: Formlabs, Inc.Inventors: Zachary Zguris, Maxim Lobovsky, Dmitri Megretski
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Patent number: 11396133Abstract: Techniques for directing light from a movable stage in an additive fabrication device are provided. According to some aspects, the movable stage may include a parabolic mirror onto which light may be directed at various different incident angles to produce light along different positions along an axis. In some cases, this axis may be perpendicular to a direction of motion of the movable stage.Type: GrantFiled: May 31, 2019Date of Patent: July 26, 2022Assignee: Formlabs, Inc.Inventors: Dmitri Megretski, Benjamin FrantzDale, Andrew M. Goldman
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Patent number: 11390027Abstract: Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.Type: GrantFiled: May 31, 2019Date of Patent: July 19, 2022Assignee: Formlabs, Inc.Inventors: Maxim Lobovsky, Shane Wighton, Dmitri Megretski, Adam Damiano
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Patent number: 11390030Abstract: According to some aspects, techniques are provided to more accurately produce fine features in additive fabrication. According to some embodiments, the techniques comprise a process that amplifies exposure to edges and thin positive features whilst not substantially affecting negative features. In particular, an area to be cured may be adapted using signal processing techniques to produce an energy density map. The area may subsequently be cured according to the generated energy density map by, for example, adjusting the scan speed, light power and/or number of passes of the light beam according to the map. As a result, the net exposure to edges and thin positive features may be amplified.Type: GrantFiled: March 12, 2020Date of Patent: July 19, 2022Assignee: Formlabs, Inc.Inventors: Andrew M. Goldman, Henry Whitney, Justin Keenan, Benjamin FrantzDale, Michael Fogleman, Dmitri Megretski
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Patent number: 11312074Abstract: According to some aspects, an additive fabrication apparatus is provided configured to form layers of material on a build platform, each layer of material being formed so as to contact a supporting liquid or a film disposed within a container, in addition to the build platform, a liquid photopolymer, and/or a previously formed layer of a material. The additive fabrication apparatus may comprise a container and a leveling element, wherein the leveling element is configured to move across a liquid-liquid interface to promote or create a flat interface between the two liquids. According to some aspects, the additive fabrication comprises a film disposed between two liquids, wherein the film maintains or provides a flat surface at the interface of the two liquids.Type: GrantFiled: September 13, 2019Date of Patent: April 26, 2022Assignee: Formlabs, Inc.Inventors: Adam Damiano, Dmitri Megretski, Shane Wighton, Maxim Lobovsky
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Patent number: 11167491Abstract: Multi-film containers for use in additive fabrication devices are provided. According to some aspects, a container may include multiple films that are at least partially detached from one another. In some embodiments, the multiple films may include films formed from different materials. As one example, an upper film may be formed so as to be relatively impermeable to substances within a source material of an additive fabrication device, whereas a lower film may be formed so as to provide desirable mechanical properties. In some cases, the multiple films may be commonly tensioned while being unattached to one another.Type: GrantFiled: May 31, 2019Date of Patent: November 9, 2021Assignee: Formlabs, Inc.Inventors: Benjamin FrantzDale, Konstantinos Oikonomopoulos, Shane Wighton, Dmitri Megretski, Adam Damiano, James Loomis, Christian Reed
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Patent number: 11149156Abstract: The present application relates generally to photopolymer blends and related methods for use in an additive fabrication (e.g., 3-dimensional printing) device. According to some aspects, compositions are provided for the modification of a base photopolymer resin. The compositions may comprise colorant agent and/or cure-modifying composition. The compositions may be selected to cause, when combined with the base photopolymer resin to form a photo-curable composition, at least one property (e.g., color, depth of the cure) of the photo-curable composition to fall within a pre-determined range. Related kits and methods are also generally described.Type: GrantFiled: April 25, 2018Date of Patent: October 19, 2021Assignee: Formlabs, Inc.Inventors: Dmitri Megretski, Maximilian Zieringer, Benjamin FrantzDale, Maxim Lobovsky
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Patent number: 11097476Abstract: Techniques for measuring a position of a build platform in an additive fabrication device are provided. Such techniques may include detecting the onset and/or dissipation of force applied to a build platform as it moves from being in contact with, to being out of contact with, a container. In some embodiments, the techniques described herein may be applied in a stereolithographic additive fabrication device. According to some embodiments, measurement of forces applied to a build platform may be used to provide for reliable and consistent measurements of the height of the build platform relative to a container by measuring such forces at various positions of the build platform and analyzing the pattern of the forces with distance from the container.Type: GrantFiled: July 15, 2019Date of Patent: August 24, 2021Assignee: Formlabs, Inc.Inventors: Alexander Nolet, Benjamin FrantzDale, Dmitri Megretski
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Publication number: 20210078251Abstract: According to some aspects, an additive fabrication apparatus is provided configured to form layers of material on a build platform, each layer of material being formed so as to contact a supporting liquid or a film disposed within a container, in addition to the build platform, a liquid photopolymer, and/or a previously formed layer of a material. The additive fabrication apparatus may comprise a container and a leveling element, wherein the leveling element is configured to move across a liquid-liquid interface to promote or create a flat interface between the two liquids. According to some aspects, the additive fabrication comprises a film disposed between two liquids, wherein the film maintains or provides a flat surface at the interface of the two liquids.Type: ApplicationFiled: September 13, 2019Publication date: March 18, 2021Applicant: Formlabs, Inc.Inventors: Adam Damiano, Dmitri Megretski, Shane Wighton, Maxim Lobovsky
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Publication number: 20200338812Abstract: According to some aspects, an additive fabrication device is provided comprising a container removably attached to the additive fabrication device, and a detector configured to sense a fluid level of photopolymer resin within the container, wherein said detector does not contact said container.Type: ApplicationFiled: July 10, 2020Publication date: October 29, 2020Applicant: Formlabs, Inc.Inventors: Dmitri Megretski, Manuel Odendahl, Eric M. Van Albert, Hugh L. Medal
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Patent number: 10744712Abstract: According to some aspects, an additive fabrication device is provided comprising a container removably attached to the additive fabrication device, and a detector configured to sense a fluid level of photopolymer resin within the container, wherein said detector does not contact said container.Type: GrantFiled: August 26, 2016Date of Patent: August 18, 2020Assignee: Formlabs, Inc.Inventors: Dmitri Megretski, Manuel Odendahl, Eric M. Van Albert, Hugh L. Medal
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Publication number: 20190366636Abstract: Techniques for directing light from a movable stage in an additive fabrication device are provided. According to some aspects, the movable stage may include a parabolic mirror onto which light may be directed at various different incident angles to produce light along different positions along an axis. In some cases, this axis may be perpendicular to a direction of motion of the movable stage.Type: ApplicationFiled: May 31, 2019Publication date: December 5, 2019Applicant: Formlabs, Inc.Inventors: Dmitri Megretski, Benjamin FrantzDale, Andrew M. Goldman
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Publication number: 20190369566Abstract: Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.Type: ApplicationFiled: May 31, 2019Publication date: December 5, 2019Applicant: Formlabs, Inc.Inventors: Maxim Lobovsky, Shane Wighton, Dmitri Megretski, Adam Damiano
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Publication number: 20190366634Abstract: Multi-film containers for use in additive fabrication devices are provided. According to some aspects, a container may include multiple films that are at least partially detached from one another. In some embodiments, the multiple films may include films formed from different materials. As one example, an upper film may be formed so as to be relatively impermeable to substances within a source material of an additive fabrication device, whereas a lower film may be formed so as to provide desirable mechanical properties. In some cases, the multiple films may be commonly tensioned while being unattached to one another.Type: ApplicationFiled: May 31, 2019Publication date: December 5, 2019Applicant: Formlabs, Inc.Inventors: Benjamin FrantzDale, Konstantinos Oikonomopoulos, Shane Wighton, Dmitri Megretski, Adam Damiano, James Loomis, Christian Reed
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TECHNIQUES FOR PRODUCING A FLAT FILM SURFACE IN ADDITIVE FABRICATION AND RELATED SYSTEMS AND METHODS
Publication number: 20190366623Abstract: Techniques for producing a flat film surface in additive fabrication are provided. According to some aspects, a movable stage may be arranged beneath a container having a base that includes a flexible film. The movable stage may include a segmented member in which a number of segments are aligned along a common axis. The segmented member may maintain contact with the flexible film as the movable stage moves beneath the container, with the segmented member producing a flat surface of the flexible film, at least within a region above the movable stage. According to some embodiments, multiple segmented members may be provided within the movable stage, such as in parallel with one another.Type: ApplicationFiled: May 31, 2019Publication date: December 5, 2019Applicant: Formlabs, Inc.Inventors: Shane Wighton, Maxim Lobovsky, Robert Joachim, Jack Moldave, Adam Damiano, Christian Reed, Dmitri Megretski, Benjamin FrantzDale -
Publication number: 20190351614Abstract: Techniques for measuring a position of a build platform in an additive fabrication device are provided. Such techniques may include detecting the onset and/or dissipation of force applied to a build platform as it moves from being in contact with, to being out of contact with, a container. In some embodiments, the techniques described herein may be applied in a stereolithographic additive fabrication device. According to some embodiments, measurement of forces applied to a build platform may be used to provide for reliable and consistent measurements of the height of the build platform relative to a container by measuring such forces at various positions of the build platform and analyzing the pattern of the forces with distance from the container.Type: ApplicationFiled: July 15, 2019Publication date: November 21, 2019Applicant: Formlabs, Inc.Inventors: Alexander Nolet, Benjamin FrantzDale, Dmitri Megretski