Looper throw-out mechanism for sewing machine

Details Looper throw-out mechanism for sewing machine Looper throw-out mechanism for sewing machine

1977-03-16

1978-05-30

Schroeder, Werner H.

Sewing

Stitch forming

Chain or double chain

D05B 5702

Patent

active

040917541

ABSTRACT:
A chain stitch sewing machine with a looper having an eye adapted for carrying thread and cooperating with at least one reciprocating needle as the looper oscillates and rocks in its operative position. The looper is supported on a looper carrier including a shaft journaled in an eccentric bore of a bushing which in turn is journaled in the bed of the sewing machine. A looper throw-out means is provided for bodily moving the looper out of its operative position for threading. The throw-out means includes a bushing support block receiving the bushing and pivotably supports a swinging latch member. The latch member includes a locking member adapted to be received within a socket member on the bed to prevent undesirable rotation of the support block, and further includes a resilient latching finger for gripping the support block to retard pivoting of the latch member when the looper is in its operative position. When it is desired to thread the looper the swinging latch member is pivoted upwardly to release the resilient finger from the block and the locking member from the bed and is then turned to rotate the support block including the looper bushing to bodily swing the looper to the threading position.

REFERENCES:
patent: 1915923 (1933-06-01), Clayton
patent: 4044699 (1977-08-01), Marforio

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