Patents by Inventor E. Mark Jahn

E. Mark Jahn 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: 5247861
    Abstract: A method of producing laminated plastic tooling suitable for use in forming sheet material by techniques such as stretch forming, hydroforming, etc. The detailed overall method comprises the steps of designing the desired tool configuration (typically by computer-aided design), machining a suitable tool baseplate, cutting plastic boardstock into suitably sized boards, trial stacking the boards to the general tool configuration, determine that stack has the correct dimensions, unstacking and cleaning the board surfaces, restacking with an adhesive between all abutting boards with clamping as necessary, curing the adhesive, machining the stack to the required configuration under numerical control, sand the shaped tool to the desired surface smoothness, check the tool with a coordinate measuring machine and coat the tool with any desired surface coating, such as an anti-chafe coating. The resulting tool is highly accurate and is capable of long-term production use.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: September 28, 1993
    Assignee: Rohr, Inc.
    Inventor: E. Mark Jahn