Patents by Inventor William J. Pappas
William J. Pappas 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).
-
Patent number: 7771183Abstract: Solid imaging apparatus and methods for use are disclosed that reduce the amount of uncured solid imaging build material remaining on a completed build object following the completion of the solid imaging build process. The amount of uncured build material is reduced through the use of either an uncoating web that removes excess build material from the build object during the course of the building process or an ink jet source of build material that uses only as much build material as is necessary for the fabrication of the build part. Also disclosed is an imager assembly for use with such a solid imaging apparatus that incorporates two or more individual imagers in an array and accounts for variations in the intensity and alignment of adjacent imagers. The apparatus can be modified for semi-continuous operation and for integrating into a manufacturing operation, if desired.Type: GrantFiled: September 17, 2007Date of Patent: August 10, 2010Assignee: 3D Systems, Inc.Inventors: Charles W. Hull, Jouni Partanen, Ray Soliz, William J. Pappas
-
Patent number: 7731887Abstract: Solid imaging apparatus and methods for use are disclosed that reduce the amount of uncured solid imaging build material remaining on a completed build object following the completion of the solid imaging build process. The amount of uncured build material is reduced through the use of either an uncoating web that removes excess build material from the build object during the course of the building process or an ink jet source of build material that uses only as much build material as is necessary for the fabrication of the build part. Also disclosed is an imager assembly for use with such a solid imaging apparatus that incorporates two or more individual imagers in an array and accounts for variations in the intensity and alignment of adjacent imagers. The apparatus can be modified for semi-continuous operation and for integrating into a manufacturing operation, if desired.Type: GrantFiled: September 17, 2007Date of Patent: June 8, 2010Assignee: 3D Systems, Inc.Inventors: Charles W. Hull, Jouni Partanen, Ray Soliz, William J. Pappas, Mehdi Mojdeh
-
Patent number: 7614866Abstract: A solid imaging apparatus is provided that includes a replaceable cartridge containing a source of build material and an extendable and retractable flexible transport film for transporting the build material layer-by-layer from the cartridge to the surface of a build in an image plane. An operator using the device needs merely to remove a spent cartridge and replace it with a fresh cartridge to continue solid imaging virtually uninterrupted. The apparatus also includes the capability of withdrawing and inserting an imager without the operator having to perform a separate alignment step. A brush attached to the transport film and forming part of the cartridge provides for intra-layer removal of excess uncured build material. If desired, the apparatus can produce a fully reacted build. A high intensity UV source cures the build between layers. An injection molded build pad is designed to hold a build in an inverted position for improving the build.Type: GrantFiled: September 17, 2007Date of Patent: November 10, 2009Assignee: 3D Systems, Inc.Inventors: Charles R. Sperry, Dennis F. McNamara, Jr., Suzanne M. Scott, Charles W. Hull, Jouni Partanen, Mehdi Mojdeh, William J. Pappas, Richard O. Gregory, II
-
Publication number: 20080206383Abstract: Solid imaging apparatus and methods for use are disclosed that reduce the amount of uncured solid imaging build material remaining on a completed build object following the completion of the solid imaging build process. The amount of uncured build material is reduced through the use of either an uncoating web that removes excess build material from the build object during the course of the building process or an ink jet source of build material that uses only as much build material as is necessary for the fabrication of the build part. Also disclosed is an imager assembly for use with such a solid imaging apparatus that incorporates two or more individual imagers in an array and accounts for variations in the intensity and alignment of adjacent imagers. The apparatus can be modified for semi-continuous operation and for integrating into a manufacturing operation, if desired.Type: ApplicationFiled: September 17, 2007Publication date: August 28, 2008Inventors: Charles W. Hull, Jouni Partanen, Ray Soliz, William J. Pappas
-
Publication number: 20080169589Abstract: A solid imaging apparatus is provided that includes a replaceable cartridge containing a source of build material and an extendable and retractable flexible transport film for transporting the build material layer-by-layer from the cartridge to the surface of a build in an image plane. An operator using the device needs merely to remove a spent cartridge and replace it with a fresh cartridge to continue solid imaging virtually uninterrupted. The apparatus also includes the capability of withdrawing and inserting an imager without the operator having to perform a separate alignment step. A brush attached to the transport film and forming part of the cartridge provides for intra-layer removal of excess uncured build material. If desired, the apparatus can produce a fully reacted build. A high intensity UV source cures the build between layers. An injection molded build pad is designed to hold a build in an inverted position for improving the build.Type: ApplicationFiled: September 17, 2007Publication date: July 17, 2008Inventors: Charles R. Sperry, Dennis F. McNamara, Suzanne M. Scott, Charles W. Hull, Jouni Partanen, Mehdi Mojdeh, William J. Pappas, Richard O. Gregory
-
Publication number: 20080171284Abstract: Solid imaging apparatus and methods for use are disclosed that reduce the amount of uncured solid imaging build material remaining on a completed build object following the completion of the solid imaging build process. The amount of uncured build material is reduced through the use of either an uncoating web that removes excess build material from the build object during the course of the building process or an ink jet source of build material that uses only as much build material as is necessary for the fabrication of the build part. Also disclosed is an imager assembly for use with such a solid imaging apparatus that incorporates two or more individual imagers in an array and accounts for variations in the intensity and alignment of adjacent imagers. The apparatus can be modified for semi-continuous operation and for integrating into a manufacturing operation, if desired.Type: ApplicationFiled: September 17, 2007Publication date: July 17, 2008Inventors: Charles W. Hull, Jouni Partanen, Ray Soliz, William J. Pappas, Mehdi Mojdeh
-
Patent number: 6621553Abstract: An apparatus and method for double-sided imaging of a plurality of photoresist-coated substrates is provided. The apparatus includes a first and second substrate holder comprising at least three extendable chucks, each adapted to hold the substrate. The first substrate holder is mounted about a first axis and the second substrate holder is mounted about a second axis such that the at least three chucks are capable of rotation about the first axis between at least a first, second and third chuck positions. A first transfer arm is disposed adjacent the first substrate holder and adapted to transfer the substrate to a chuck of the first substrate holder when the chuck is in the first chuck position. A first mask is positioned adjacent the chuck in the second chuck position of the first substrate holder. A second mask is provided adjacent the chuck in the second chuck position of the second substrate holder.Type: GrantFiled: March 30, 2001Date of Patent: September 16, 2003Assignee: Perkinelmer, Inc.Inventors: Gregory R. Baxter, Victor M. Jacobo, William J. Pappas
-
Publication number: 20020139481Abstract: An apparatus and method for double-sided imaging of a plurality of photoresist-coated substrates is provided. The apparatus includes a first and second substrate holder comprising at least three extendable chucks, each adapted to hold the substrate. The first substrate holder is mounted about a first axis and the second substrate holder is mounted about a second axis such that the at least three chucks are capable of rotation about the first axis between at least a first, second and third chuck positions. A first transfer arm is disposed adjacent the first substrate holder and adapted to transfer the substrate to a chuck of the first substrate holder when the chuck is in the first chuck position. A first mask is positioned adjacent the chuck in the second chuck position of the first substrate holder. A second mask is provided adjacent the chuck in the second chuck position of the second substrate holder.Type: ApplicationFiled: March 30, 2001Publication date: October 3, 2002Inventors: Gregory R. Baxter, Victor M. Jacobo, William J. Pappas