Patents by Inventor Hans Schimmelpfennig

Hans Schimmelpfennig 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 casting a printing head for an ink jet printer
    Patent number: 4447375
    Abstract: A method for casting the print head of an ink jet printer employs a lost mold open at two opposite sides, one side being covered by transparent film onto which mold needles are lowered by means of a micro manipulator. The tips of the mold needles are imaged onto photodetectors, which furnishes signals for controlling operation of a micro manipulator for accurately positioning the tips of the mold needles. After the mold needles are inserted in position, the mold is filled with liquid synthetic material which, on hardening, forms the print head with micro channel ink conduits correctly defined by the positions of the mold needles.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: May 8, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventor: Hans Schimmelpfennig