Rotary hook sewing machine

Details Rotary hook sewing machine Rotary hook sewing machine

1975-11-24

1977-03-01

Krizmanich, George H.

Sewing

Elements

Revolving hooks

112258, D05B 5714

Patent

active

040096700

ABSTRACT:
In a rotary hook, lockstitch, stationary bobbin case sewing machine, a bobbin is mounted on a bobbin ejector carried on the center post of an open ended bobbin case. A thread tensioner is attached to the outside of the bobbin case. Illumination is provided and the thread supply can be viewed at any time through a magnifying window and the exposed flange of the bobbin. Release of a latch on the center post permits removal and replacement of the bobbin without detaching any other part.

REFERENCES:
patent: 388323 (1888-08-01), Vannett
patent: 2808797 (1957-10-01), Ayres
patent: 2965057 (1960-12-01), Lakin
patent: 3067703 (1962-12-01), Gustin
patent: 3071091 (1963-01-01), Erbland
patent: 3476068 (1969-11-01), Preston

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