Sewing machine apparatus for aligning and sewing pieces of textile fabric or the like
Patent 4037546 Issued on July 26, 1977. Estimated Expiration Date: 
July 26, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 26, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3262410 3867889 3903818 3911840 Sewing machine having top and bottom feed synchronizing means Patent #: 3954071 InventorAssigneeApplicationNo. 05/709051 filed on 07/27/1976US Classes:112/470.28, Having drag clamp112/311, Clamp type112/470.31, For sewing plural workpieces under tension112/470.32, Differential feed of plural workpieces112/470.33, Elongated article226/111With means to independently vary mover speedExaminersPrimary: Hunter, H. HamptonAttorney, Agent or FirmAbstracta sewing machine apparatus for aligning one side of a series of fabric panels in a predetermined position. The apparatus includes measuring devices which associate with and continually monitor the position of one side of the fabric panels with respect to each other. A control means, responsive to the output of the measuring means, selectively advances or retards the top feeding mechanism engaging with the top layer or fabric or the bottom feed mechanism engageable with the bottom layer of fabric, as may be necessary, whereby aligning one side of the fabric panels at the completion of the sewing operation. | |
