Patents by Inventor Frank A. Sportelli

Frank A. Sportelli 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).

  • Printing screen and method of making same
    Patent number: 4495517
    Abstract: A printing plate is made in accordance with a particular method and is used in a printing process wherein it is effective to produce a substantially continuous tone printing effect. A negative screen having an overall pattern defined by rows of closely spaced substantially square-shaped areas is exposed a plurality of times on an image carrier. An image screen pattern is developed on the image carrier wherein each of the plurality of exposures of the overall pattern on the negative screen is effected at a different angle with respect to each other. A unique printing screen pattern is obtained which is then used for printing a reproduced image.
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: January 22, 1985
    Inventor: Frank A. Sportelli
  • Printing screen and method of making same
    Patent number: 4394424
    Abstract: A printing plate is made in accordance with a particular method and is used in a printing process wherein it is effective to produce a substantially continuous tone printing effect. A negative screen having an overall pattern defined by rows of closely spaced substantially square-shaped areas is exposed two times on an image carrier. An image screen pattern is developed on the image carrier wherein each of the two exposures of the overall pattern on the negative screen is effected at an angle of 30.degree. with respect to each other. A unique printing screen pattern is obtained which is then used for printing a reproduced image.
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: July 19, 1983
    Inventor: Frank A. Sportelli
  • Printing screen and method of making same
    Patent number: 4283471
    Abstract: A printing plate is made in accordance with a particular method and is used in a printing process wherein it is effective to produce a substantially continuous tone printing effect. A negative screen having an overall pattern defined by rows of closely spaced substantially square-shaped areas is exposed a plurality of times on an image carrier. An image screen pattern is developed on the image carrier wherein each of the plurality of exposures of the overall pattern on the negative screen is effected at a different angle with respect to each other. A unique printing screen pattern is obtained which is then used for printing a reproduced image.
    Type: Grant
    Filed: November 2, 1979
    Date of Patent: August 11, 1981
    Inventor: Frank A. Sportelli
  • Light transmitting panel
    Patent number: D263426
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: March 16, 1982
    Inventor: Frank A. Sportelli
  • Light transmitting panel
    Patent number: D271138
    Type: Grant
    Filed: August 11, 1981
    Date of Patent: October 25, 1983
    Inventor: Frank A. Sportelli