Upper looper driving device of sewing machine

Sewing – Stitch forming – Chain or double chain

Reexamination Certificate

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Details

C112S220000

Reexamination Certificate

active

07600481

ABSTRACT:
An upper looper driving device of a sewing machine is provided. The device includes an upper looper driving shaft which is rotatable around an axis thereof, an upper looper holder having an upper end portion at which the upper looper is held, an upper looper swinging arm having one end portion supported by the upper looper driving shaft such that a position of the upper looper swinging arm is adjustable along an axial direction of the upper looper driving shaft and the other end portion to which the upper looper holder is rotatably coupled, and an upper looper guide slidably holding the upper looper holder. The upper looper guide is supported by a frame of the sewing machine such that a position of the upper looper guide is adjustable along a direction parallel to the axial direction of the upper looper driving shaft.

REFERENCES:
patent: 3465701 (1969-09-01), Walling
patent: 3670677 (1972-06-01), Hirayama
patent: 3881434 (1975-05-01), Kelly
patent: 4690080 (1987-09-01), Mikuni et al.
patent: 5237942 (1993-08-01), Satoma
patent: 5301622 (1994-04-01), Sakuma
patent: 5664509 (1997-09-01), Tseng
patent: 7458326 (2008-12-01), Yamaguchi et al.
patent: 2006-141548 (2006-06-01), None

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