中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

47 records (took 0.024 seconds)

    13.
    发明专利
    未知

    公开(公告)号：DE68929309D1

    公开(公告)日：2001-08-02

    申请号：DE68929309

    申请日：1989-04-17

    Applicant: 3D SYSTEMS INC

    Inventor： HULL CHARLES WILLIAM ,  LEWIS CHARLES WILLIAM ,  FREED RAYMOND SAMUEL ,  SPENCE STUART THOMAS ,  VINSON WAYNE ALLAN ,  SMALLEY DENNIS ROLLETTE

    IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  B44B1/00 ,  G03F7/00 ,  G03F7/20 ,  G06F17/50

    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 structurally specified to reduce curl, stress and distortion in the ultimately formed object, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise 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. A stereolithographic distortion known as curl is defined, and several techniques to eliminate or reduce curl are described, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques. In addition, a quantitative measurement of curl known as the curl factor, and a test part known as a quarter cylinder are described, which together can be used to measure the effectiveness of the above techniques in reducing curl.

    STEREOLITHOGRAPHIC CURL REDUCTION
    14.
    发明专利
    STEREOLITHOGRAPHIC CURL REDUCTION 未知

    公开(公告)号：HK1004856A1

    公开(公告)日：1998-12-11

    申请号：HK98101823

    申请日：1998-03-04

    Applicant: 3D SYSTEMS INC

    Inventor： HULL CHARLES WILLIAM ,  LEWIS CHARLES WILLIAM ,  FREED RAYMOND SAMUEL ,  SPENCE STUART THOMAS ,  VINSON WAYNE ALLAN ,  SMALLEY DENNIS ROLLETTE

    IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  B44B1/00 ,  G03F7/00 ,  G03F7/20 ,  G06F17/50 ,  B29C

    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 structurally specified to reduce curl, stress and distortion in the ultimately formed object, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise 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. A stereolithographic distortion known as curl is defined, and several techniques to eliminate or reduce curl are described, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques. In addition, a quantitative measurement of curl known as the curl factor, and a test part known as a quarter cylinder are described, which together can be used to measure the effectiveness of the above techniques in reducing curl.

    17.
    发明专利
    未知

    公开(公告)号：DE68927908T2

    公开(公告)日：1997-09-25

    申请号：DE68927908

    申请日：1989-04-17

    Applicant: 3D SYSTEMS INC

    Inventor： HULL CHARLES WILLIAM ,  LEWIS CHARLES WILLIAM VAN ,  FREED RAYMOND SAMUEL ,  SPENCE STUART THOMAS ,  VINSON WAYNE ALLAN ,  SMALLEY DENNIS ROLLETTE

    IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  B44B1/00 ,  G03F7/00 ,  G03F7/20 ,  G06F17/50 ,  B29C39/42

    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 structurally specified to reduce curl, stress and distortion in the ultimately formed object, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise 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. A stereolithographic distortion known as curl is defined, and several techniques to eliminate or reduce curl are described, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques. In addition, a quantitative measurement of curl known as the curl factor, and a test part known as a quarter cylinder are described, which together can be used to measure the effectiveness of the above techniques in reducing curl.

    19.
    发明专利
    未知

    公开(公告)号：DE68927908D1

    公开(公告)日：1997-04-30

    申请号：DE68927908

    申请日：1989-04-17

    Applicant: 3D SYSTEMS INC

    Inventor： HULL CHARLES WILLIAM ,  LEWIS CHARLES WILLIAM VAN ,  FREED RAYMOND SAMUEL ,  SPENCE STUART THOMAS ,  VINSON WAYNE ALLAN ,  SMALLEY DENNIS ROLLETTE

    IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  B44B1/00 ,  G03F7/00 ,  G03F7/20 ,  G06F17/50 ,  B29C39/42

    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 structurally specified to reduce curl, stress and distortion in the ultimately formed object, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise 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. A stereolithographic distortion known as curl is defined, and several techniques to eliminate or reduce curl are described, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques. In addition, a quantitative measurement of curl known as the curl factor, and a test part known as a quarter cylinder are described, which together can be used to measure the effectiveness of the above techniques in reducing curl.

Patent Agency Ranking