Pretension threading device

Details Pretension threading device Pretension threading device

1978-10-12

1979-07-17

Schroeder, Werner H.

Sewing

Elements

Tensioning

112259, D05B 4700

Patent

active

041611527

ABSTRACT:
A threading device facilitating threading of a pretension device located on the rear surface of the bracket arm of a sewing machine. The threading device has a segment projecting beyond a rear corner of the arm to facilitate introduction of thread by an operator seated in front of the machine. An ear and fin member guide the thread from the point of thread introduction into engagement with the pretension device, and preclude the thread from becoming unthreaded.

REFERENCES:
patent: 2554895 (1951-05-01), Robert
patent: 2756704 (1956-07-01), Lawber
patent: 3954073 (1976-05-01), Varin
patent: 3970019 (1976-07-01), Coulombe et al.
patent: 3972298 (1976-08-01), Berman et al.

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