公开(公告)号：AT209101T

公开(公告)日：2001-12-15

申请号：AT95917693

申请日：1995-04-25

Applicant: 3D SYSTEMS INC

Inventor： GIGL JOHN J ,  PANG THOMAS H ,  SMALLEY DENNIS R ,  ALLEN KERRY J ,  VORGITCH THOMAS J ,  MANNERS CHRIS R ,  EARL JOCELYN M ,  BEDAL BRYAN J L ,  JACOBS PAUL F ,  NGUYEN HOP D ,  LEYDEN RICHARD N ,  HULL CHARLES W ,  VANDORIN STACIE L

IPC: B29C35/08 ,  B29C67/00 ,  G06F17/50 ,  G06T17/00

公开(公告)号：DE68929292T2

公开(公告)日：2001-08-23

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.

公开(公告)号：HK1004477A1

公开(公告)日：1998-11-27

申请号：HK98102087

申请日：1998-03-12

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 ,  B29C ,  G01F

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.

公开(公告)号：MX9705844A

公开(公告)日：1997-11-29

申请号：MX9705844

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 ,  B29C67/02

Abstract: Se describen métodos y aparatos para utilizarse en el desarrollo de objetos tridimensionales en una base sustancialmente en seccion transversal incluyendo métodos y aparatos para formar capas sucesivas utilizando rodillos de rotacion contraria, recubridores de chorro de tinta, miembros de rotacion, los cuales hacen oscilar el material, barras aplicadoras que surten el material a través de un menisco y/o corrientes independientemente surtidas y también incluyendo métodos y aparatos para determinar una region preferida sobre la cual se forma una capa y para verificar los errores de desarrollo.

公开(公告)号：CA1337955C

公开(公告)日：1996-01-23

申请号：CA612990

申请日：1989-09-25

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 ,  B29C64/124 ,  B29C41/12 ,  B29C67/00 ,  B29K105/24 ,  G01F23/292 ,  G01F23/36 ,  G05D9/12 ,  B29C39/42

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.

公开(公告)号：AT130793T

公开(公告)日：1995-12-15

申请号：AT89309762

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 ,  SMALLEY DENNIS R ,  COHEN ADAM L

IPC: B29C35/08 ,  B29C41/12 ,  B29C67/00 ,  B29K105/24 ,  G01F23/292 ,  G01F23/36 ,  G05D9/12 ,  B29C39/42

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.

公开(公告)号：CA2186613A1

公开(公告)日：1995-11-02

申请号：CA2186613

申请日：1995-04-25

Applicant: 3D SYSTEMS INC

Inventor： GIGL JOHN J ,  PANG THOMAS H ,  SMALLEY DENNIS R ,  ALLEN KERRY J ,  VORGITCH THOMAS J ,  MANNERS CHRIS R ,  EARL JOCELYN M ,  BEDAL BRYAN J L ,  JACOBS PAUL F ,  NGUYEN HOP D ,  LEYDEN RICHARD N ,  HULL RICHARD N ,  VANDORIN STACIE L

IPC: B29C35/08 ,  B29C67/00 ,  G06F17/50 ,  G06T17/00 ,  G03F7/20

Abstract: A method and apparatus for making high resolution objects by stereolithography utilizing low resolution materials which are limited by their inability to form unsupported structures of desired thinness and/or their inability to form coatings of desired thinness. Data manipulation techniques, based on layer comparisons, are used to control exposure in order to delay solidification of the material on at least portions of at least some cross-sections until higher layers of material are deposited so as to allow down-facing features of the object to be located at a depth in the building material which is equal to or exceeds a minimum cure depth that can effectively be used for solidifying these features. Similar data manipulations are used to ensure minimum reliable coating thicknesses exist, above previously solidified material, before attempting solidification of a next layer. In addition, horizontal comparison techniques are used to provide enhanced cross-sectional data for use in forming the object. Further, several techniques for automatically performing Zerror correction through the manipulation of a three-dimensional object representation are described. Still further, techniques for producing objects useful for investment casting applications are described, including techniques allowing for the drainage of unsolidified material. A method and apparatus for the automatic generation of vents and drain is also provided.

公开(公告)号：CA2072136A1

公开(公告)日：1991-05-01

申请号：CA2072136

申请日：1990-10-30

Applicant: 3D SYSTEMS INC

Inventor： JACOBS PAUL F ,  HULL CHARLES W ,  SMALLEY DENNIS R ,  ALLISON JOSEPH W

IPC: B29C35/08 ,  B29C67/00 ,  B29C67/02 ,  B29K105/24 ,  G03F7/00 ,  G03F7/20

Abstract: Improved methods for building stereolithographically-formed parts include providing skinned layers in more than the up- and down- facing features of the part, to methods for avoiding over-exposure of down-facing regions at points of intersection of exposing vectors, and to methods for determining skin thickness.