Sewing machine with latch back device

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

1990-12-20

1993-04-20

Nerbun, Peter

Sewing

Elements

Frames

112288, D05B 6500

Patent

active

052032701

ABSTRACT:
An apparatus and method for creating a "serging", "overlock" or "504" stitch wherein the excess thread chain (44) extending from the sewing machine needle to the previously sewn garment part (54) is cut in a manner to create a leading thread chain of a predetermined length extending from the sewing machine needle, and the free end of the leading thread chain is drawn off by a stream of air flowing into a hollow member (31) acting as a chaining tongue (29). The leading thread chain is subsequently progressively withdrawn from the chaining tongue and oversewn into the stitching of a succeeding garment. The hollow member (31) acting as the chaining tongue (29) is integrally formed with the throat plate (21) of the sewing machine (20). A vacuum reservoir (81) is connected to the hollow member (31) to create the air flow through the hollow member to draw the leading thread chain therein.

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