Patents by Inventor Frank F. Waas

Frank F. Waas 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: 4475646
    Abstract: Apparatus for conveying flat, preferably plate-shaped members that have previously been processed on one or both surfaces through a processing unit, for example, conveying printed electrical circuit boards through a circulating air drying or auxiliary finishing oven, includes a rotor having more than one receptor device for accepting the members individually, which receptor devices are situated on the periphery of a hub-shaped carrier. The rotor is driven to rotate in a stepwise fashion corresponding to the arrangement of the receptor devices. Elements for loading and unloading the members, that function within the periphery of the rotor are also provided.
    Type: Grant
    Filed: October 22, 1982
    Date of Patent: October 9, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank F. Waas