Rotary hook

Details Rotary hook Rotary hook

1990-08-29

1991-12-31

Schroeder, Werner H.

Sewing

Elements

Revolving hooks

112230, 112231, 112232, 112256, D05B 5716, D05B 5726

Patent

active

050761820

ABSTRACT:
A fully rotating hook includes an inner bobbin case, an outer loop taker mounted about the bobbin case, the loop taker having a track groove formed therein, a rotating member for rotating the loop taker such that relative rotation occurs between the loop taker and the bobbin case, and a stopper member for preventing rotation of the bobbin case with the loop taker while the loop taker is rotating. The track groove of the loop taker is formed by at least one wall therein which is coated with a layer of synthetic resin material having a small coefficient of friction to reduce friction between a track projection member on the bobbin case and the track groove of the loop taker.

REFERENCES:
patent: 2673541 (1954-03-01), Biesemeyer
patent: 2822773 (1958-02-01), Ivanko
patent: 2851978 (1958-09-01), Eriksson
patent: 2857869 (1958-10-01), Odermann
patent: 3146744 (1964-09-01), Bradshaw
patent: 3296989 (1967-01-01), Orth et al.
patent: 3380843 (1968-04-01), Davis
patent: 4371220 (1983-02-01), Brucher
patent: 4393798 (1983-07-01), Cheng
patent: 4575145 (1986-03-01), Wolfram et al.
patent: 4660487 (1987-04-01), Mikuni

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