Yoshida Kogyo K.k.

Yasuhiro Fukumoto

Chet P Dudek

Kiichirou Ishikawa

Toshiaki Sawada

James Hutcherson

A trouser-fly piece serging apparatus includes a guide unit disposed upstream of a serging station and composed of a first elongate guide member extending at an angle relative to the path of movement of a trouser-fly piece being advanced by a serging unit, and a second elongate guide member extending parallel to the path of movement of the trouser-fly piece. The trouser-fly piece is guided by the first guide member into the serging station so that a trimming cutter disposed immediately upstream of the serging unit assumes a position to conform to a curvature of the leading end of a substantially arcuate trimming line passing across a corner of the leading end of the trouser-fly piece. Synchronous operation of the serging unit and the trimming cutter causes the trouser-fly piece to turn in one direction during which an arcuate corner which is trimmed by the trimming cutter and subsequently serged by the serging unit is automatically produced on the leading end of the trouser-fly piece. Then, the trouser-fly piece is guided by the second guide member, and as the trouser-fly piece is further advanced, a curved longitudinal edge of the trouser-fly piece including the trimmed arcuate corner is completely serged with an overedge or serge stitching.

Trouser-fly piece serging apparatus

In a sewing of successive substantially rectangular fly pieces to a continuous slide fastener chain on a sewing machine, a corner of the leading end of the individual fly piece is automatically folded as the fly piece is advanced toward a sewing station defined by the sewing machine, then two plies of the folded corner are joined with a line of stitches when the fly piece is sewn to the slide fastener chain by the same stitches. A longitudinal edge of the fly pieces is serged with a line of overedge stitches running across the folded corner.

Growing community of inventors

Marietta, GA, United States of America

Yasuhiro Fukumoto