Patents by Inventor Frank Weimann

Frank Weimann 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).

  • Method of and apparatus for processing exhausted air in tobacco processing plants
    Patent number: 5901709
    Abstract: A first stream of contaminated air containing solid impurities including reusable tobacco particles is exhausted from a machine for the making of smokers' products and is caused to pass first through a first filter which separates therefrom all of the impurities, and the thus decontaminated air is caused to pass through a cooler and back to the machine. The separated impurities are caused to pass through a second filter which segregates therefrom the reusable tobacco particles, and such particles are reintroduced into the machine. The first stream of contaminated air can receive a second stream of contaminated air from a second machine, and such second stream is introduced into the first stream ahead of the first filter.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: May 11, 1999
    Assignee: Hauni Maschinenbau AG
    Inventors: Firdausia Chehab, Stefan Fietkau, Frank Weimann