Patents by Inventor Johan H. Hemel

Johan H. Hemel 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 the continuous stacking of paperboard blanks
    Patent number: 4188861
    Abstract: Disclosed is an apparatus for the continuous stacking of paperboard blanks issuing from a continuously running corrugator capable of producing orders of blanks of different sizes. The stacking apparatus includes a vacuum control box and a variable speed endless conveyor belt which is adapted to speed up and create a gap between the blanks of various sizes. In operation the gap provided allows the blanks of one size to be stacked without interrupting the continuous running of the corrugator.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: February 19, 1980
    Assignee: Koppers Company, Inc.
    Inventors: Hendrik J. Kroeze, Johan H. Hemel