Overlock sewing machine

Sewing – Stitch forming – Chain or double chain

Reexamination Certificate

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Details

C112S220000

Reexamination Certificate

active

07458326

ABSTRACT:
An overlock sewing machine including a main shaft rotated by a sewing machine motor; a vertically moving sewing needle and an overlooper and an underlooper respectively driven by the rotation of the main shaft; a single looper drive shaft forming overlock stitches in cooperation with the overlooper, the underlooper and the sewing needle and rotated by the rotation of the main shaft, shaft line thereof being arranged perpendicularly to the main shaft; and a swing generating member having first and second swing generating portions fixed to the looper drive shaft for swinging the overlooper and the underlooper respectively; a first and second swing link mechanisms, both of which extend perpendicularly to the looper drive shaft, swinging the overlooper and the underlooper by conveying the drive force generated by the first and second sewing generating portions.

REFERENCES:
patent: 3301207 (1967-01-01), Reeber et al.
patent: 4690080 (1987-09-01), Mikuni et al.
patent: 4967677 (1990-11-01), Seiriki et al.
patent: 4977842 (1990-12-01), Fukao et al.
patent: 5237942 (1993-08-01), Satoma
patent: 5704303 (1998-01-01), Tseng
patent: 5732639 (1998-03-01), Kojima et al.
patent: 6880472 (2005-04-01), Horiuchi
patent: 7011032 (2006-03-01), Chang
patent: B2 58-19317 (1983-04-01), None
patent: A-1-303194 (1989-12-01), None
patent: Y2 6-04875 (1994-02-01), None
patent: Y2 7-19435 (1995-05-01), None
patent: B2 2624512 (1997-04-01), None

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