Rotary hook assembly
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 14, 1992
Grant Date -
N/A
app pub date -
Apr 14, 1989
filing date -
Jan 16, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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