Patents by Inventor Randolph L. Davidson

Randolph L. Davidson 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).

  • Hybrid disk-cone extrusion die module
    Patent number: 6638461
    Abstract: The present invention discloses an extrusion die module having a flat compression seal and a conical or otherwise angled spillover surface. The die module promotes a flat surface to flat surface compression seal outside of the flow distribution channels and promotes better streamlined flow and material combination than a traditional flat disk die module. The die module promotes a reduced overall diameter and wetted diameter in comparison to standard flat disk dies. Further, the present invention relates to a method for utilizing an extrusion die module with a conical or otherwise angled spillover surface to minimize the die surface area wetted by an intermediate layer in a multi-layer coextrusion process.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Pechiney Emballage Flexible Europe
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die assembly
    Patent number: 6638462
    Abstract: The present invention relates to an extrusion die assembly. Specifically, the present invention relates to an extrusion die assembly comprising a pair of extrusion dies wherein one extrusion die is disposed within the second extrusion die. The extrusion dies may comprise a plurality of extrusion die modules wherein at least one of the extrusion die modules incorporates a flat compression deal with a conical or otherwise angled spillover surface. Further, the present invention relates to a method for utilizing an extrusion die assembly comprising a pair of extrusion dies, each having at least one extrusion die module having a conical or otherwise angled spillover surface.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Pechiney Emballage Flexible Europe
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die module having a spillover surface surrounded by a planar seal surface
    Patent number: 6638463
    Abstract: The present invention discloses an extrusion die module having a flat compression seal surrounding a conical or otherwise angled spillover surface. The die module promotes a flat surface to flat surface compression seal outside of the flow distribution channels and promotes better streamlined flow and material combination than a traditional flat disk die module. The die module promotes a reduced overall diameter and wetted diameter in comparison to standard flat disk dies. In addition, the conical or angled spillover surface is surrounded by the planar sealing surface. Further, the present invention relates to a method for utilizing an extrusion die module with a conical or otherwise angled spillover surface to minimize the die surface area wetted by an intermediate layer in a multi-layer coextrusion process.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Pechiney Emballage Flexible Europe
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die module having a spillover surface surrounding a planar seal surface
    Patent number: 6638464
    Abstract: The present invention discloses an extrusion die module having a flat compression seal surrounded by a conical or otherwise angled spillover surface. The die module promotes a flat surface to flat surface compression seal outside of the flow distribution channels and promotes better streamlined flow and material combination than a traditional flat disk die module. The die module promotes a reduced overall diameter and wetted diameter in comparison to standard flat disk dies. In addition, the present invention relates to an extrusion die module having a spillover surface surrounding a planar sealing surface. Further, the present invention relates to a method for utilizing an extrusion die module with a conical or otherwise angled spillover surface to minimize the die surface area wetted by an intermediate layer in a multi-layer coextrusion process.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Pechiney Emballage Flexible Europe
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die module
    Publication number: 20030020203
    Abstract: The present invention discloses an extrusion die module having a flat compression seal and a conical or otherwise angled spillover surface. The die module promotes a flat surface to flat surface compression seal outside of the flow distribution channels and promotes better streamlined flow and material combination than a traditional flat disk die module. The die module promotes a reduced overall diameter and wetted diameter in comparison to standard flat disk dies. Further, the present invention relates to a method for utilizing an extrusion die module with a conical or otherwise angled spillover surface to minimize the die surface area wetted by an intermediate layer in a multi-layer coextrusion process.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 30, 2003
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die module having a spillover surface surrounded by a planar seal surface
    Publication number: 20030020205
    Abstract: The present invention discloses an extrusion die module having a flat compression seal surrounding a conical or otherwise angled spillover surface. The die module promotes a flat surface to flat surface compression seal outside of the flow distribution channels and promotes better streamlined flow and material combination than a traditional flat disk die module. The die module promotes a reduced overall diameter and wetted diameter in comparison to standard flat disk dies. In addition, the conical or angled spillover surface is surrounded by the planar sealing surface. Further, the present invention relates to a method for utilizing an extrusion die module with a conical or otherwise angled spillover surface to minimize the die surface area wetted by an intermediate layer in a multi-layer coextrusion process.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 30, 2003
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die assembly
    Publication number: 20030020204
    Abstract: The present invention relates to an extrusion die assembly. Specifically, the present invention relates to an extrusion die assembly comprising a pair of extrusion dies wherein one extrusion die is disposed within the second extrusion die. The extrusion dies may comprise a plurality of extrusion die modules wherein at least one of the extrusion die modules incorporates a flat compression deal with a conical or otherwise angled spillover surface. Further, the present invention relates to a method for utilizing an extrusion die assembly comprising a pair of extrusion dies, each having at least one extrusion die module having a conical or otherwise angled spillover surface.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 30, 2003
    Inventors: Randolph L. Davidson, Robert John Blemberg
  • Hybrid disk-cone extrusion die module having a spillover surface surrounding a planar seal surface
    Publication number: 20030020206
    Abstract: The present invention discloses an extrusion die module having a flat compression seal surrounded by a conical or otherwise angled spillover surface. The die module promotes a flat surface to flat surface compression seal outside of the flow distribution channels and promotes better streamlined flow and material combination than a traditional flat disk die module. The die module promotes a reduced overall diameter and wetted diameter in comparison to standard flat disk dies. In addition, the present invention relates to an extrusion die module having a spillover surface surrounding a planar sealing surface. Further, the present invention relates to a method for utilizing an extrusion die module with a conical or otherwise angled spillover surface to minimize the die surface area wetted by an intermediate layer in a multi-layer coextrusion process.
    Type: Application
    Filed: July 27, 2001
    Publication date: January 30, 2003
    Inventors: Randolph L. Davidson, Robert John Blemberg