Patents by Inventor Alfred Trojan

Alfred Trojan 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).

  • Accessory unit for a sewing machine for automatically sewing pieces of ribbon material onto a sewing material
    Patent number: 5029543
    Abstract: An accessory unit (2) for a sewing machine (1) for automatically sewing pieces of ribbon material (20) onto a sewing material (5), has a hollow guide shaft (23) with a longitudinal slot (24) to guide the ribbon material (20). A needle (25) is used as an advance feed mechanism and can be inserted through the slot (24) into the ribbon material (20) which passes through the guide shaft (23), by means of which the ribbon material (20) can be advanced in the longitudinal direction of the guide shaft (23). The accessory unit (2) can be swivelled around a vertical axis (x) by at least 90.degree. relative to the sewing machine (1).
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: July 9, 1991
    Assignee: Anton Cramer GmbH & Co.
    Inventor: Alfred Trojan