Method of forming a folded hem and system for guiding a multiple ply seam of a textile work piece
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United States of America Patent
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May 4, 1999
Grant Date -
N/A
app pub date -
Dec 2, 1997
filing date -
Dec 2, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A guiding system for use with translucent textile work pieces is disclosed. A free edge (52) of a tubular work piece extends along a continuous processing path and is folded under the work piece to form a hem in the work piece. The work piece is then advanced along the processing path toward a downstream sewing machine (11), whereupon the hem is sewn in the work piece. A lower ply sensing opposed beam sensor (76) upstream of the sewing machine detects a multiple ply leading edge of the folded hem, and is moved by a pneumatic cylinder (88) into a position laterally with respect to the processing path where it will detect the free edge of the folded and sewn hem, and will control a lower work piece guide assembly (34) so as to maintain a proper depth of the hem. This enables the sewing needles (20) of the sewing machine to align the two spaced parallel lines of stitching (68) at the beginning and end of the hem line for minimizing waste in such hem forming operations.
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