Plural, Mutually Counterbalancing Work Supports Patents (Class 134/87)
  • Method of and arrangement for cleaning, activating and metallizing of bore holes in conductor boards
    Patent number: 4789405
    Abstract: Cleaning, activating and metallizing of bore holes in conductor boards is performed by supplying a liquid treatment medium in form a standing wave onto a lower side of the conductor board by a surge line which is formed as a nozzle arranged under a transporting path and substantially normal to a transporting direction of the horizontally guided conductor board.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: December 6, 1988
    Assignee: Schering Aktiengesellschaft
    Inventors: Horst Blasing, Walter Meyer