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    113.
    发明专利
    未知

    公开(公告)号：DE68929292D1

    公开(公告)日：2001-05-23

    申请号：DE68929292

    申请日：1989-09-26

    Applicant: 3D SYSTEMS INC

    Inventor： ALMQUIST THOMAS A ,  HULL CHARLES W ,  MODREK BORZO ,  SERKUCZEWSKI ANDRZEJ R ,  JACOBS PAUL F ,  LEWIS CHARLES W ,  LEWIS MARK A ,  LIRAN ABRAHAM

    IPC: B29C35/08 ,  B29C41/12 ,  B29C67/00 ,  B29K105/24 ,  G01F23/292 ,  G01F23/36 ,  G05D9/12 ,  G01F23/28

    Abstract: A stereolithography method and system for producing three-dimensional plastic objects by forming a plurality of thin layers of partially cured plastic material which are thin cross sections of the desired object. A layer of polymerizable resin is applied to a support surface and the excess is struck off, such as with a doctor blade, to form a smoothed layer. The smoothed layer is subjected to radiation in a predetermined pattern to form the cross-sectional layer into the desired shape. A plurality of layers are subsequently applied, leveled, then cured in the same manner to produce the desired three-dimensional object. Apparatus for measuring the level of the surface of a fluid is also provided. Variations in the level of fluid will be detected and may be used to drive a pump, diaphragm, or plunger in order to maintain the level of the fluid.

    114.
    发明专利
    未知

    公开(公告)号：AT200644T

    公开(公告)日：2001-05-15

    申请号：AT95107870

    申请日：1989-09-26

    Applicant: 3D SYSTEMS INC

    Inventor： ALMQUIST THOMAS A ,  HULL CHARLES W ,  MODREK BORZO ,  SERKUCZEWSKI ANDRZEJ R ,  JACOBS PAUL F ,  LEWIS CHARLES W ,  LEWIS MARK A ,  LIRAN ABRAHAM

    IPC: B29C35/08 ,  B29C41/12 ,  B29C67/00 ,  B29K105/24 ,  G01F23/292 ,  G01F23/36 ,  G05D9/12 ,  G01F23/28

    Abstract: A stereolithography method and system for producing three-dimensional plastic objects by forming a plurality of thin layers of partially cured plastic material which are thin cross sections of the desired object. A layer of polymerizable resin is applied to a support surface and the excess is struck off, such as with a doctor blade, to form a smoothed layer. The smoothed layer is subjected to radiation in a predetermined pattern to form the cross-sectional layer into the desired shape. A plurality of layers are subsequently applied, leveled, then cured in the same manner to produce the desired three-dimensional object. Apparatus for measuring the level of the surface of a fluid is also provided. Variations in the level of fluid will be detected and may be used to drive a pump, diaphragm, or plunger in order to maintain the level of the fluid.

    117.
    发明专利
    未知

    公开(公告)号：BR9610663A

    公开(公告)日：1999-07-13

    申请号：BR9610663

    申请日：1996-09-27

    Applicant: 3D SYSTEMS INC

    Inventor： EARL JOCELYN M ,  MANNERS CHRIS R ,  KEREKES THOMAS A ,  MARYGOLD PAUL H ,  THAYER JEFFREY S

    IPC: B22F3/00 ,  B29C35/08 ,  B29C41/12 ,  B29C41/36 ,  B29C67/00 ,  B29K63/00 ,  G06T17/00 ,  G06K15/10

    Abstract: A three-dimensional object is formed by selectively depositing successive layers (14) of build material from a print-head (9) having a plurality of orifices or nozzles (10(1)-10(96)), such as an ink-jet type of print-head. The print-head (9) is moved (X-Y control) relative to a support platform (15) in a series of scans in the X-direction offset from one another in the Y-direction and possibly overlapping. The orifices (10(1)-10(96)) extend transversely of the scan X-direction and may be set at an angle (α) to it to control the resolution perpendicular to the scan direction. The platform (15) is movable relative to the print-head in the Z-direction for forming each successive layer (14). The build material is a flowable material and may be a radiation-curable material, such as an ultra-violet curable photo-polymer. The data according to which each layer is formed may be manipulated according to a selected build style to determine the selective activation of the print-head orifices.

    119.
    发明专利
    未知

    公开(公告)号：BR9607005A

    公开(公告)日：1997-10-28

    申请号：BR9607005

    申请日：1996-01-29

    Applicant: 3D SYSTEMS INC

    Inventor： ALMQUIST THOMAS A ,  HULL CHARLES W ,  THAYER JEFFREY S ,  LEYDEN RICHARD N ,  JACOBS PAUL F ,  SMALLEY DENNIS R

    IPC: B29C35/08 ,  B29C41/12 ,  B29C41/36 ,  B29C67/00

    Abstract: Methods and apparatus for use in building three-dimensional objects on substantially a cross-sectional basis including methods and apparatus for forming successive layers using counter-rotating rollers, ink jet recoaters, spinning members which sling material, applicator bars that dispense material via a meniscus and/or independently dispensed streams, and also including methods and apparatus to determine a preferred region over which to form a layer and to check for building errors.

    METHODS FOR CURING PARTIALLY POLYMERIZED PARTS
    120.
    发明专利
    METHODS FOR CURING PARTIALLY POLYMERIZED PARTS 未知

    公开(公告)号：CA1338954C

    公开(公告)日：1997-03-04

    申请号：CA596838

    申请日：1989-04-17

    Applicant: 3D SYSTEMS INC

    Inventor： MODREK BORZO ,  PARKER BRENT ,  SPENCE STUART THOMAS

    IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  B29C67/08 ,  G03C9/08

    Abstract: An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, information defining the object being specially processed to reduce curl and distortion, and increase resolution, strength, accuracy, speed and economy of reproduction even for rather difficult object shapes, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a stepwise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process, and further including post processing wherein the object is subjected to additional ultraviolet curing while the object is under water.

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