Patents by Inventor Robert E. Gitlin

Robert E. Gitlin 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: 5934212
    Abstract: This invention relates to an improved automatic sewing machine apparatus for sewing large articles, in lock-stitch or chain-stitch, employing two completely different upper and lower sewing mechanisms which are separately powered, wherein there is no continuous mechanical, electrical, hydraulic or other fixed connection between the upper and lower sewing mechanisms required. An open notched needle has a notch opening disposed near the needle end, the notch opening engages the needle thread, and carries the needle thread through the sewing material, and then leaves a loop extending through the sewing material as the notched needle raises above the sewing material. The notch opening in the needle is rethreaded during each cyclic, reciprocating actuation of the notched needle. A looper having two forked arms passes the thread loop around the bobbin case. The position of the open notched needle determines the timing of the looper actuation. The open notched needle position is sensed through the sewing material.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: August 10, 1999
    Inventors: Harris M Gitlin, Robert E. Gitlin