Sewing machine provided with a threading device for threading a

Details Sewing machine provided with a threading device for threading a Sewing machine provided with a threading device for threading a

1992-04-27

1993-03-23

Falik, Andrew M.

Sewing

Elements

Needles

D05B 8702

Patent

active

051954524

ABSTRACT:
A multineedle sewing machine is provided with a needle bar and a threading bar supported for turning about its axis and for vertical movement in parallel to the needle bar fixedly provided at its lower end with a hook holding member. A threading hook member is supported on the hook holding member so as to be movable in directions perpendicular to the axis of the threading bar in a plane. The position of the threading hook member relative to the threading bar can be changed by turning a lever. A positioning cam having a cam surface provided with positioning recesses is provided for turning on the threading bar near the upper end of the same, and a pin fixed to the threading bar is in egagement with the cam surface of the positioning cam. When the lever is turned, the positioning cam is turned to determine the vertical position of the threading bar selectively and, at the same time, a radius changing lever is turned to change the radius of turning of the threading hook member.

REFERENCES:
patent: 4893573 (1990-01-01), Moriya
patent: 5072678 (1991-12-01), Satoma
patent: 5143005 (1992-09-01), Jimenez

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