Horizontal rotary hook including loop spreader

Details Horizontal rotary hook including loop spreader Horizontal rotary hook including loop spreader

1994-06-20

1995-06-27

Crowder, Clifford D.

Sewing

Elements

Revolving hooks

112187, D05B 5708

Patent

active

054270421

ABSTRACT:
A horizontal rotary hook has an outer rotating hook body provided with a mounting protrusion protruding from the outer circumference of the side wall thereof and provided with an upper mounting surface and a side mounting surface. A thread catching member is placed movably on the upper mounting surface of the mounting protrusion, the horizontal position of the thread catching member relative to the axis of the outer rotating hook body is determined by using a positioning jig, and then the thread catching member is fixed to the mounting protrusion of the outer rotating hook body by welding. A loop expanding member is joined to the thread catching member so as to stand perpendicularly to the upper surface of the thread catching member and a part of the loop expanding member is fixed to the side mounting surface of the mounting protrusion by welding. Since the horizontal position of the thread catching member is adjustable, the component parts of the horizontal rotary hook need not be formed in a very high dimensional accuracy but the horizontal rotary hook can be assembled with a high accuracy in order to prevent stitch skipping and noise generation, and can be manufactured at a reduced cost.

REFERENCES:
patent: 2989017 (1961-06-01), Taketomi
patent: 3139050 (1964-06-01), Grabowski
patent: 3921551 (1975-11-01), Gustmann et al.
patent: 4660487 (1987-04-01), Mikuni
patent: 4966088 (1990-10-01), Badillo

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