Patents by Inventor Conrad J. Steigerwald

Conrad J. Steigerwald 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: 4131042
    Abstract: Apparatus for cutting and removing layers of photoresist overlaying tooling holes in a printed wire board blank. A lower cutter is mounted on a base so that its cutting edge projects above the upper surface of the base a distance substantially equal to the thickness of a layer of photoresist. A cutter head is mounted on the base for movement parallel to the upper surface of the base. An upper cutter is mounted on the cutter head for movement by a cutter actuator to cause the upper and lower cutters to sever segments of layers of photoresist overlaying a tooling hole of a PWB blank positioned between them. Each cutter is provided with a plunger movable within their respective cutters. The upper surface of the lower plunger, when the lower plunger is retracted, projects above the lower cutting edge of the lower cutter; and the upper plunger is biased downwardly so that its bottom surface projects below the cutting edges of the upper cutter.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: December 26, 1978
    Assignee: Honeywell Information Systems Inc.
    Inventors: Dennis E. Rich, Conrad J. Steigerwald