Patents by Inventor Peter J. Twist

Peter J. Twist 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: 6824963
    Abstract: A method of chemically marking photosensitive material that needs to be digitally scanned and adjusted rather than optically printed to produce a satisfactory hardcopy.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: November 30, 2004
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Peter J. Twist
  • Publication number: 20040067457
    Abstract: A method of chemically marking photosensitive material that needs to be digitally scanned and adjusted rather than optically printed to produce a satisfactory hardcopy.
    Type: Application
    Filed: September 30, 2003
    Publication date: April 8, 2004
    Inventors: John R. Fyson, Peter J. Twist
  • Publication number: 20040063046
    Abstract: A method of chemically marking photosensitive material that needs to be digitally scanned and adjusted rather than optically printed to produce a satisfactory hardcopy.
    Type: Application
    Filed: September 30, 2003
    Publication date: April 1, 2004
    Inventors: John R. Fyson, Peter J. Twist
  • Patent number: 6692904
    Abstract: A photographic washing bath comprises a chamber containing a wash solution for a silver halide photographic material having a pH of less than 7 and comprising water having dissolved therein an oxidizing agent, said oxidizing agent having an oxidizing potential of at least 1 volt and being in a concentration of from 0.05 to 2 Molar. The oxidation potential of the oxidizing agent is preferably at least 1.2 volts and may be hydrogen peroxide or a source of hydrogen peroxide, a persulphate, a perborate, a bromate, or an iodate. A washing process using the invention is suitable for being carried out in same chamber as the development and fixing stages in which case hydrogen peroxide is the preferred oxidizing agent because any peroxide remaining at the end of the wash stage can be removed by evaporation, thereby avoiding risk of contamination of the next stage to be carried out in the chamber.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: February 17, 2004
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Jeffrey L. Hall, Peter J. Twist
  • Patent number: 6620578
    Abstract: A method for processing a silver halide photographic material comprises the steps of loading the material into a chamber adapted to hold the material therein, introducing a metered amount of a first processing solution into the chamber, processing the photographic material with the first processing solution, introducing a metered amount of a second processing solution which is other than a second part of the first processing solution into the chamber without removing the first processing solution so that at least part of the total volume of the second processing solution is provided by the first processing solution and processing the photographic material with the second processing solution, the total volume of solution for each processing stage being spread over the whole area of the photographic material in a repetitive manner to enable uniform processing.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: September 16, 2003
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Patent number: 6619861
    Abstract: An apparatus for processing photographic material has a chamber which is manufactured such that temperature uniformity is maintained across the chamber.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: September 16, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Leslie Wells
  • Publication number: 20030148229
    Abstract: A photographic washing bath comprises a chamber containing a wash solution for a silver halide photographic material having a pH of less than 7 and comprising water having dissolved therein an oxidizing agent, said oxidizing agent having an oxidizing potential of at least 1 volt and being in a concentration of from 0.05 to 2 Molar. The oxidation potential of the oxidizing agent is preferably at least 1.2 volts and may be hydrogen peroxide or a source of hydrogen peroxide, a persulphate, a perborate, a bromate, or an iodate. A washing process using the invention is suitable for being carried out in same chamber as the development and fixing stages in which case hydrogen peroxide is the preferred oxidizing agent because any peroxide remaining at the end of the wash stage can be removed by evaporation, thereby avoiding risk of contamination of the next stage to be carried out in the chamber.
    Type: Application
    Filed: February 14, 2003
    Publication date: August 7, 2003
    Inventors: John R. Fyson, Jeffrey L. Hall, Peter J. Twist
  • Publication number: 20030108827
    Abstract: A method of chemically marking photosensitive material that needs to be digitally scanned and adjusted rather than optically printed to produce a satisfactory hardcopy.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 12, 2003
    Applicant: Eastman Kodak Company
    Inventors: John R. Fyson, Peter J. Twist
  • Patent number: 6554506
    Abstract: The method and apparatus supplies processing solution directly to the surface of a web of sensitized material by means of a movable applicator. The web and applicator are moved relative to each other to enable good mixing of the solution on the surface. The movable applicators can be moved in and out of contact with the material as required so that the process can be varied.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: April 29, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Anthony Earle
  • Patent number: 6554505
    Abstract: A method of processing light sensitive material by the surface application of fresh processing solution to the surface of a moving belt by means of an applicator. The material to be processed is brought into moving contact with the moving belt, the resulting relative motion providing a high level of agitation and mixing of the processing solution.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: April 29, 2003
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Publication number: 20030072573
    Abstract: The method and apparatus supplies processing solution directly to the surface of a web of sensitized material by means of a movable applicator. The web and applicator are moved relative to each other to enable good mixing of the solution on the surface. The movable applicators can be moved in and out of contact with the material as required so that the process can be varied.
    Type: Application
    Filed: May 22, 2002
    Publication date: April 17, 2003
    Inventors: Peter J. Twist, Anthony Earle
  • Patent number: 6537739
    Abstract: A method of delivering processing solution to a processing device wherein the processing solutions are provided within sealed members fixedly arranged on a movable web. The web moves relative to the processing area and the sealed members are ruptured when the processing solution within is required.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: March 25, 2003
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Patent number: 6518001
    Abstract: A method of processing photographic material in which a fixed volume of processing solution is added to the surface of the material and spread repeatedly over the length of material. The processing solution is added to the material in at least two stages.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: February 11, 2003
    Assignee: Eastman Kodak Company
    Inventor: Peter J. Twist
  • Patent number: 6517262
    Abstract: An apparatus for processing photographic material comprises a chamber adapted to hold the material therein, means for introducing solution into the chamber, means for removing the solution from the chamber, and a member located within the chamber and filling a central part thereof. A gap is defined between the inner wall of the chamber and the central member in which the material is held, thereby retaining the material around the inner circumference of the chamber.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: February 11, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Anthony Earle
  • Patent number: 6508598
    Abstract: The present invention relates to a processing system and method for processing photographic material. The processing system and method of the invention is adapted to recover water from humid air for reuse in the processor, as well as convert a liquid waste processing solution into a dry waste for disposal. In the system and method of the present invention, heated air is circulated through the processor and comes into contact with a cold surface to condense the heated air. The water resulting from this contacting of the heated air with the cold surface can be collected and recycled back to the processor for reuse in the processor. Further, waste solution can be absorbed by a matting material appropriately placed in the processor which evaporates the waste solution to a solid waste for subsequent disposal.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: January 21, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Nigel R. Wildman, Eric R. Schmittou
  • Patent number: 6505979
    Abstract: A method of processing a photographic material in which the material is loaded into a rotatable chamber and a metered amount of solution is introduced into the chamber. The chamber is rotated and the solution is continuously swept along the surface of the material, forming a wave through which the material passes to enable uniform processing.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: January 14, 2003
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Anthony Earle, Nigel R. Wildman, Leslie R. Wells
  • Publication number: 20020181959
    Abstract: An apparatus for processing photographic material has a chamber which is manufactured such that temperature uniformity is maintained across the chamber.
    Type: Application
    Filed: April 29, 2002
    Publication date: December 5, 2002
    Applicant: Eastman Kodak Company
    Inventors: Peter J. Twist, Leslie Wells
  • Patent number: 6468721
    Abstract: The method and apparatus supplies processing solution directly to the surface of a web of sensitized material by means of a movable applicator. The web and applicator are moved relative to each other to enable good mixing of the solution on the surface. The movable applicators can be moved in and out of contact with the material as required so that the process can be varied.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: October 22, 2002
    Assignee: Eastman Kodak Company
    Inventors: Peter J. Twist, Anthony Earle
  • Publication number: 20020136994
    Abstract: This invention relates to a silver halide photographic element comprising a support and at least one gelatin containing imaging or non-imaging layer wherein during chemical processing the maximum swell of the layer is greater than the equilibrium swell.
    Type: Application
    Filed: December 19, 2000
    Publication date: September 26, 2002
    Applicant: Eastman Kodak Company
    Inventors: Tiecheng A. Qiao, Daniel L. Kapp, Yongcai Wang, Peter J. Twist
  • Patent number: 6444416
    Abstract: This invention relates to a silver halide photographic element comprising a support and at least one gelatin containing imaging or non-imaging layer wherein during chemical processing the maximum swell of the layer is greater than the equilibrium swell.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: September 3, 2002
    Assignee: Eastman Kodak Company
    Inventors: Tiecheng A. Qiao, Daniel L. Kapp, Yongcai Wang, Peter J. Twist