Full rotary hook with an increased amount of bobbin thread wound

Details Full rotary hook with an increased amount of bobbin thread wound Full rotary hook with an increased amount of bobbin thread wound

1991-03-06

1992-05-05

Schroeder, Werner H.

Sewing

Elements

Revolving hooks

D05B 5714

Patent

active

051097834

ABSTRACT:
The amount of a bobbin thread wound in a bobbin of a full rotary hook is increased by making a circumferential portion of a bobbin case holder between a thread separating portion and a thread releasing portion thinner than the remainder of the circumference, thereby increasing the inner diameter of the bobbin case holder. Thereby, the inner diameter of the bobbin housed in the bobbin case holder and the inner diameter of the cylindrical portion housing the bobbin case can be increased and consequently an outer diameter of a flange of the bobbin can be increased, thereby increasing the amount of the bobbin thread wound around the bobbin.

REFERENCES:
patent: 683847 (1901-10-01), Catenalli et al.
patent: 2949874 (1960-08-01), Kuhar
patent: 2974618 (1961-03-01), Kuhar
patent: 3199480 (1965-08-01), Covert et al.
patent: 3347193 (1967-10-01), Perri
patent: 3373707 (1968-03-01), Ketterer
patent: 3682121 (1972-08-01), Kasawaki
patent: 4884250 (1989-12-01), Simizu

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