Patents by Inventor Douglas A. Cahill

Douglas A. Cahill 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: 5601959
    Abstract: A process and associated element for forming an image on an substrate using an electrographic element comprising a releasable dielectric image receptive layer supported on an electrically conductive carrier sheet by applying an adhesive coating on the substrate front surface, producing a toned image on the image receptive dielectric layer, contacting the image to the adhesive layer thereby adhering the electrographic element to the substrate, and separating and removing the carrier sheet from the image receptive layer, whereby the image receptive layer and the toned image remain on the substrate.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: February 11, 1997
    Assignee: Rexam Graphics, Inc.
    Inventors: Donald A. Brault, Douglas A. Cahill, Dene H. Taylor, Anthony K. Webb
  • Patent number: 5488455
    Abstract: Novel electrographically produced products are disclosed which include large format posters, billboards and the like produced by a process employing a novel electrographic element which includes a base, a release layer and a combined transparent dielectric and adhesive layer which is substantially tack-free, at ambient pressure and temperature. The new product is made by an imaging process involving:A) producing a toned image layer on the surface of the electrographic element and B) pressure laminating a receptor substrate at an elevated temperature to the toned image layer to form the completed electrographic image. The base and release layer may be stripped from the dielectric/adhesive layer which then serves to protect the transferred, toned, electrographically generated image from abrasion and environmental contaminants.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: January 30, 1996
    Assignee: Rexam Graphics
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright, Dene H. Taylor
  • Patent number: 5483321
    Abstract: A novel process is disclosed for the manufacture of protected, distortion-free, full-color electrographic images for use on large format posters, billboards and the like. A novel electrographic element is also disclosed, which includes a base, a release layer and a combined transparent dielectric and adhesive layer which is substantially tack-free, at ambient pressure and temperature. The novel electrographic imaging process includes the steps of: A) producing a toned image layer on the surface of the electrographic element and B) pressure laminating the receptor substrate, optionally at an elevated temperature to the toned image layer to form the completed electrographic image. The base and release layer may be stripped from the dielectric/adhesive layer which then serves to protect the transferred, toned, electrographically generated image from abrasion and environmental contaminants.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: January 9, 1996
    Assignee: Rexam Graphics
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright, Dene H. Taylor
  • Patent number: 5475480
    Abstract: A novel two step process is disclosed for the manufacture of protected, distortion-free, full-color electrographic images for use on large format posters, billboards and the like. A novel electrographic element, which is used in the process, comprises a carrier layer; optionally, a protective layer; a conductive layer; a dielectric layer; and a substantially tack-free, adhesive layer which is activated at a pressure and a temperature which is above ambient pressure and temperature of the electrographic element. The novel electrographic imaging process comprises: A) producing a toned image layer on the surface of the electrographic element, so that the toned image layer is adhered to the surface of the adhesive layer; and B) pressure laminating the receptor substrate at an elevated temperature to the toned image layer to form the completed electrographic image.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: December 12, 1995
    Assignee: Rexham Graphics Inc.
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright
  • Patent number: 5414502
    Abstract: A novel two step process is disclosed for the manufacture of protected, distortion-free, full-color electrographic images for use on large format posters, billboards and the like. A novel electrographic element, which is used in the process, comprises a carrier layer; optionally, a protective layer; a conductive layer; a dielectric layer; and a substantially tack-free, adhesive layer which is activated at a pressure and a temperature which is above ambient pressure and temperature of the electrographic element. The novel electrographic imaging process comprises: A) producing a toned image layer on the surface of the electrographic element, so that the toned image layer is adhered to the surface of the adhesive layer; and B) pressure laminating the receptor substrate at an elevated temperature to the toned image layer to form the completed electrographic image.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: May 9, 1995
    Assignee: Rexham Graphics Inc.
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright
  • Patent number: 5400126
    Abstract: An electrographic imaging element having the following structure:a) a carrier layer,b) a conductive layer,c) a dielectric layer, andd) a substantially tack-free, adhesive layer which is activated at a pressure and a temperature which is above ambient pressure and temperature of the electrographic element and wherein a toned electrographically image generated on the element is produced on the surface of the adhesive layer.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: March 21, 1995
    Assignee: Rexham Graphics, Inc.
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright
  • Patent number: 5397634
    Abstract: A novel transfer element for protecting, graphic arts images is disclosed. The transfer element consists essentially of, a temporary carrier layer, a substantially silane-free protective layer, and an adhesive layer permanently adhered to the protective layer. In particular, the temporary carrier layer is a polymeric sheet material, a foraminous sheet material, or composites thereof; and the protective layer comprises a cross-linked cellulose ester. When the transfer element of this invention is used, the temporary carrier layer is removed, as the final step, from the protective layer which remains substantially intact. The transfer element is useful in manufacturing protected images of all sizes and is particularly suited to protecting large format images such as billboards.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: March 14, 1995
    Assignee: Rexham Graphics Incorporated
    Inventors: Douglas A. Cahill, Richard S. Himmelwright, Francis J. Kearney, Joseph M. Roach
  • Patent number: 5370960
    Abstract: A novel process for forming protected, electrographic image on a substrate is disclosed. An electrographic element used in the process comprises a supporting layer, a conductive layer, and a dielectric layer. A protective element used in the process comprises a temporary support layer, a protective layer, and an adhesive layer. The novel electrographic imaging process comprises the steps of producing a toned electrographic image on the surface of the electrographic element; applying and adhering the adhesive layer of the protective element to the toned electrographic image to form an imaged composite; removing the supporting layer from the composite to uncover the conductive layer; pressure laminating the final substrate to the conductive layer; and then removing the temporary support layer from the protective layer to form the protected, electrographic image on the substrate of choice.
    Type: Grant
    Filed: April 2, 1993
    Date of Patent: December 6, 1994
    Assignee: Rexham Graphics Incorporated
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright
  • Patent number: 5363179
    Abstract: A novel two step process is disclosed for the manufacture of protected, distortion-free, full-color electrographic images for use on large format posters, billboards and the like. A novel electrographic element, which is used in the process, comprises a carrier layer; optionally, a protective layer; a conductive layer; a dielectric layer; and a substantially tack-free, adhesive layer which is activated at a pressure and a temperature which is above ambient pressure and temperature of the electrographic element. The novel electrographic imaging process comprises: A) producing a toned image layer on the surface of the electrographic element, so that the toned image layer is adhered to the surface of the adhesive layer; and B) pressure laminating the receptor substrate at an elevated temperature to the toned image layer to form the completed electrographic image.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: November 8, 1994
    Assignee: Rexham Graphics Inc.
    Inventors: Douglas A. Cahill, Donald A. Brault, Richard S. Himmelwright