Patents by Inventor Paulus N. Terpstra

Paulus N. Terpstra 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).

  • Filter for a high pressure separating press
    Patent number: 4684466
    Abstract: A filter is described which is particularly designed for use in a high pressure separating press, e.g. a cocoa press, so as to considerably increase the useful life of the filter by avoiding breakage of metal screen components. The filter is characterized by positioning of the screen components in a metal ring provided with a peripheral flange which extends in a radially inward direction towards the axis of the filter, the inner diameter of which flange differs from the inner diameter of the ring by about half the difference between the diameter of the pitch circle of the outer groove of the press platen and the inner diameter of the ring.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: August 4, 1987
    Assignee: Cacaofabriek de Zaan B.V.
    Inventor: Paulus N. Terpstra