Patents by Inventor Josef Schrofele

Josef Schrofele 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: 5874114
    Abstract: A press for producing compacts from powdery material. The press has a die with a cavity that receives particles therein. A lower punch moves towards an upper punch to press the particles within the cavity. A cam disk moves the lower punch by way of a movable base-plate. Motion is transmitted through a sliding block to the base-plate and a cylinder having a piston causes movement of the die during at least a portion of the movement of the lower punch over its path of travel to the upper punch.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: February 23, 1999
    Assignee: Dorst-Maschinen und Anlagenbau Otto Dorst und Dipl. Ing. Walter Schlegel GmbH & Co.
    Inventor: Josef Schrofele
  • Patent number: 5635219
    Abstract: A slide opening system for a tool system for compacting powdery materials having an upper ram, a lower ram and an insertable tool frame in which punch holders are moved relative to the base-plate from their filling position downward to the pressing position and from the pressing position upward to the ejection position which corresponds to the filling position (ejection method), and a further punch holder is moved from the filling position downward to the pressing position and from the pressing position downward to the withdrawal position (withdrawal method), with plungers acting on slides for releasing the withdrawal plate for the withdrawal motion, whereby the plungers of the slide opening system each act on a preferably stepped slide via a pivoted lever in the form of a cam disk with leverage that changes during the opening process and at least one roll located on the lever.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: June 3, 1997
    Assignee: Dorst-Maschinen- und Anlagenbau Otto Dorst und Dipl.-Ing. Walter Schlegel GmbH & Co.
    Inventors: Josef Schrofele, Roland Fleissner