Rotary hook assembly

Details Rotary hook assembly Rotary hook assembly

1984-12-31

1987-05-19

Reynolds, Wm. Carter

Sewing

Elements

Revolving hooks

D05B 5708, D05B 5726

Patent

active

046658505

ABSTRACT:
A rotary hook assembly including a bobbin case basket, for therein accommodating a bobbin case containing a bobbin having bobbin thread wound therearound, on the outer periphery of which there is formed a guide rim. A rotary hook, for therein accommodating the bobbin case basket, has a guide groove formed on the inner periphery thereof. A metal hard-facing coating layer is applied on the outer periphery of the bobbin case basket, the inner periphery of the rotary hook, and/or the outer periphery of the bobbin case by utilizing an ion-plating method.

REFERENCES:
patent: 3347193 (1967-10-01), Perri
patent: 3642546 (1972-02-01), Van Thyne et al.
patent: 4252862 (1981-02-01), Nishida
patent: 4450205 (1984-05-01), Itaba et al.
patent: 4580510 (1986-04-01), Hirose

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