Patents by Inventor Petrus Johannes Buysman

Petrus Johannes Buysman 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).

  • Apparatus for forming apertures in a thin metal tape such as a shadow mask for a color television display tube
    Patent number: 4069085
    Abstract: A method of forming apertures in a thin metal tape. Cavities having a depth of at least half of the tape thickness are first etched from one side. Etching is then carried out mainly from the other side until apertures having the desired profile have been formed. During etching the first-mentioned side, the said other side is covered with a foil of synthetic resin. Shadow mask for a color television display tube manufactured according to a similar method.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: January 17, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Petrus Johannes Buysman, Gerardus Antonius Wilhelmus Vermeulen, Cornelis Arie Bos
  • Apparatus for etching a continuously moving thin metal strip
    Patent number: 4011123
    Abstract: An apparatus for etching a continuously moving thin metal strip in which the length of the etching compartment is adjustable to adapt the etching duration to the thickness of the strip. The length is adjustable by means of a movable housing which comprises closure means through which the strip enters or leaves the etching compartment.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: March 8, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Petrus Johannes Buysman