Sewing machine with automatic latch back device

Details Sewing machine with automatic latch back device Sewing machine with automatic latch back device

D - Textiles, Paper

05

B

D05B 65/00 (2006.01) D06G 3/04 (2006.01) D06H 3/16 (2006.01) D05B 41/00 (2006.01) D05B 73/12 (2006.01)

Patent

CA 2076379

SEWING MACHINE WITH AUTOMATIC LATCH BACK DEVICE ABSTRACT An apparatus and method for creating an overlock stitch wherein the excess thread chain (65) extending from the sewing machine needles (19) and the hollow chaining (32) to the previously sewn garment part (60) is stretched and is cut by thread chain cutter (70) to create a leading thread chain of predetermined length extending from the sewing machine needle and the hollow chaining tongue. When cut, the thread chain recoils toward the hollow chaining tongue, and a stream of air draws the free end of the thread chain into the hollow chaining tongue. When the next workpiece is moved through the sewing area, the thread chain in the hollow chaining tongue is attached to the workpiece and is progressively drawn out of the hollow chaining tongue and oversewn in the overlock stitch.

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