Overlock sewing machine with a threading mechanism for easily th

Details Overlock sewing machine with a threading mechanism for easily th Overlock sewing machine with a threading mechanism for easily th

1989-05-26

1990-12-18

Schroeder, Werner H.

Sewing

Stitch forming

Chain or double chain

112162, 112165, 112270, 112302, 112154, D05B 5700, D05B 5702

Patent

active

049778420

ABSTRACT:
This invention provides an overlock sewing machine with a threading mechanism that is both easier and more efficient to use. As shown in FIGS. 1 and 7, the overlock sewing machine has a vertically movable needle (6, 106), a looper carriage (18, 118) connected to a rotating shaft, and a looper (11, 111) on the end of the looper carriage. The looper extends laterally over the looper carriage and has a thread-receiving eye (11a, 111a). The looper and the needle cooperate to form a chain stitch. As shown in FIGS. 3 and 9, a thread-guiding member (25, 125) next to the looper pivots with the looper to guide a thread LT through the thread-receiving eye. A movable lever (30, 130) pivots with or relative to the looper. A thread-delivering member (39, 139) mounted on the movable lever that can be set in two positions: a first position corresponding to a first position of the thread-receiving eye, and a second position corresponding to the thread-guiding member. In the second position, the thread passes through the thread-guiding member.

REFERENCES:
patent: 541518 (1895-06-01), Woodward
patent: 1000134 (1911-08-01), Weis
patent: 2265678 (1941-12-01), Summers
patent: 2778329 (1957-01-01), Howell et al.
patent: 3333560 (1967-08-01), Wiener et al.
patent: 3465701 (1969-09-01), Walling
patent: 3722438 (1973-03-01), Schinzel
patent: 4356782 (1982-11-01), Ueyama et al.
patent: 4373460 (1983-02-01), Parker et al.
patent: 4649841 (1987-03-01), Koshinaka
patent: 4649843 (1987-03-01), Muroi
patent: 4690080 (1987-09-01), Mikuni et al.

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