Patents by Inventor Theodore A. Melander

Theodore A. Melander 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: 4174169
    Abstract: An automatic anti-oxidation fluid replenisher system for processors of photosensitive material has an improved, digital electronic control system. The control system includes a digital binary counter which is counted down if use-related chemical replenishment is not occurring in the processor, and is counted up (generally at a different rate) if use-related chemical replenishment is occurring in the processor. When the counter reaches a predetermined value (e.g. zero), a detection circuit triggers anti-oxidation replenishment and resets the counter to its original value for further operation. A special circuit protects against counter roll-over should the counter reach its maximum capacity due to frequent chemical replenishment activity.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: November 13, 1979
    Assignee: Pako Corporation
    Inventors: Theodore A. Melander, Ralph L. Charnley
  • Patent number: 4160153
    Abstract: A system having two heaters, such as a photographic processor with a solution heater and a dryer heater, has proportional controllers for each of the heaters. A priority control co-ordinates operation of the two controllers to give full priority to one of the two heaters during warm up, and a reduced percentage for running conditions. The other heater is allowed to share the remaining available input power.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: July 3, 1979
    Assignee: Pako Corporation
    Inventor: Theodore A. Melander
  • Patent number: 4128325
    Abstract: A replenisher system for photographic processors includes an automatic calibration system. A film sensor senses when film approaches the density sensor (and guarantees that the sensor is clear), and the automatic calibration system calibrates the density sensor (or other film parameter sensor) of the replenisher system prior to the film reaching the density sensor. The automatic calibration is performed each time a strip of film enters the processor, and reaches the density sensor, thereby assuring that drift and other variations in density sensor output unrelated to the film density are eliminated. In addition, the automatic calibration system provides a data valid signal after the density sensor has been calibrated to allow the replenisher control to accept the output signals from the density sensor and control the supply of replenisher fluid to the processor only for a limited time interval after calibration (i.e. while film is actually present in the density sensor).
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: December 5, 1978
    Assignee: Pako Corporation
    Inventors: Theodore A. Melander, Ralph L. Charnley
  • Patent number: RE31484
    Abstract: An automatic anti-oxidation fluid replenisher system for processors of photosensitive material has an improved, digital electronic control system. The control system includes a digital binary counter which is counted down if use-related chemical replenishment is not occurring in the processor, and is counted up (generally at a different rate) if use-related chemical replenishment is occurring in the processor. When the counter reaches a predetermined value (e.g. zero), a detection circuit triggers anti-oxidation replenishment and resets the counter to its original value for further operation. A special circuit protects against counter roll-over should the counter reach its maximum capacity due to frequent chemical replenishment activity.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: January 3, 1984
    Assignee: Pako Corporation
    Inventors: Theodore A. Melander, Ralph L. Charnley