Patents by Inventor Mark A. Hackler

Mark A. Hackler 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: 7398812
    Abstract: This invention pertains to a method and apparatus for thermally developing a photosensitive element, and particularly to a method and apparatus for supporting the photosensitive element with a removable flexible support member during thermal treatment.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: July 15, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Mark A. Hackler, Dietmar Dudek, William W. Early, Anandkumar R. Kannurpatti, Jeffrey Robert Lake, Robert A. McMillen, David B. Neufeglise, Pier Luigi Sassanelli
  • Patent number: 7358026
    Abstract: This invention relates to a method for thermally developing a photosensitive element to form a relief pattern. The method includes heating a composition layer of the element to cause a portion of the layer to liquefy and providing a development medium under tension to the element to absorb the liquefied composition. The development medium includes an absorbent material and a support, the combination of which minimizes stretch and distortion of the absorbent material and can impede the migration of the liquefied composition through the absorbent material.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: April 15, 2008
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dietmar Dudek, Mark A. Hackler, Robert A. McMillen, Allan Banke
  • Patent number: 7348123
    Abstract: A flexographic printing plate is prepared from a photosensitive element having a photopolymerizable elastomeric layer with specific rheological properties. The element is imagewise exposed and thermally treated to form a relief structure suitable for flexographic printing.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: March 25, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Christoph Mengel, Dietmar Dudek, Mark A Hackler, Anandkumar Ramakrishnan Kannurpatti
  • Patent number: 7122295
    Abstract: A flexographic printing plate is prepared from a photosensitive element having a photopolymerizable elastomeric layer with specific rheological properties. The element is imagewise exposed and thermally treated to form a relief structure suitable for flexographic printing.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: October 17, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Christoph Mengel, Dietmar Dudek, Mark A. Hackler, Anandkumar Ramakrishnan Kannurpatti
  • Patent number: 6797454
    Abstract: A method and apparatus for thermal processing a photosensitive element includes heating a composition layer on a flexible substrate to a melt temperature of an unirradiated area of the composition layer and maintaining the flexible substrate at a temperature below the melt temperature while pressing a heated absorbent layer against the heated composition layer, and repeating these steps for multiple cycles. A further embodiment of the method includes a step of cooling the flexible substrate and layer laminate on each cycle to maintain the flexible substrate at the desired temperature below that of the heated composition layer.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: September 28, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Melvin Harry Johnson, David Anthony Belfiore, Mark A. Hackler, Anandkumar Ramakrishnan Kannurpatti, Robert Lee Brown, Stephen Cushner, Robert Finley Drury
  • Patent number: 6773859
    Abstract: The invention relates to a process for preparing a flexographic printing plate from a photosensitive element having a photopolymerizable layer and a thermally removable layer on the photopolymerizable layer. The process includes imagewise exposing the photosensitive element and thermally treating the exposed element to form a relief suitable for use in flexographic printing. The thermally removable layer can be transparent or opaque to actinic radiation. The invention also relates to a photosensitive element for use in this process. The photosensitive element includes a photopolymerizable layer and at least one thermally removable layer having a filler and a binder, wherein the binder is less than 49% by weight, based on the total weight of the binder and filler.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: August 10, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Roxy Ni Fan, Mark A. Hackler, Anandkumar R. Kannurpatti, Adrian Lungu, Bradley K. Taylor
  • Publication number: 20030211423
    Abstract: A flexographic printing plate is prepared from a photosensitive element having a photopolymerizable elastomeric layer with specific rheological properties. The element is imagewise exposed and thermally treated to form a relief structure suitable for flexographic printing.
    Type: Application
    Filed: October 18, 2002
    Publication date: November 13, 2003
    Inventors: Christoph Mengel, Dietmar Dudek, Mark A. Hackler, Anandkumar Ramakrishnan Kannurpatti
  • Publication number: 20030180655
    Abstract: The invention relates to a process for preparing a flexographic printing plate from a photosensitive element having a photopolymerizable layer and a thermally removable layer on the photopolymerizable layer. The process includes imagewise exposing the photosensitive element and thermally treating the exposed element to form a relief suitable for use in flexographic printing. The thermally removable layer can be transparent or opaque to actinic radiation. The invention also relates to a photosensitive element for use in this process. The photosensitive element includes a photopolymerizable layer and at least one thermally removable layer having a filler and a binder, wherein the binder is less than 49% by weight, based on the total weight of the binder and filler.
    Type: Application
    Filed: February 27, 2002
    Publication date: September 25, 2003
    Inventors: Roxy Ni Fan, Mark A. Hackler, Anandkumar R. Kannurpatti, Adrian Lungu, Bradley K. Taylor