Patents by Inventor Erhard Smek

Erhard Smek 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).

  • Process of tempering plastic injection molding tools
    Patent number: 4902454
    Abstract: A process for tempering tools, for use on the form tools of extrusion forming machines. In the injection molding tools there are conduction circuits for a coolant which are connected to ducts for the inflow and backflow of the coolant. Valves (4) control the throughflow of the coolant. There are temperature sensors (5, 6) in the ducts for the inflow and backflow of the coolant. The temperature sensors (5, 6) are connected to a computer (7) which controls the opening and closing times of the valves (4) as a function of a nominal difference fed in between the inflow and backflow temperatures of the coolant. Advantageously, a temperature sensor (3) which is also connected to the computer (7) is provided on the form tool.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: February 20, 1990
    Assignee: Engel Maschinenbau Gesellschaft m.b.H.
    Inventors: Georg Steinbichler, Erhard Smek, Alfred Lampl