Automatic notching device in a sewing machine

Details Automatic notching device in a sewing machine Automatic notching device in a sewing machine

1984-06-12

1985-05-21

Schroeder, Werner H.

Sewing

Work manipulating

Trimmers

D05B 3702

Patent

active

045179085

ABSTRACT:
An automatic notching device in a sewing machine comprises a worm engaged with a worm gear fixed to a driving shaft of the sewing machine, a driving cam having a cam portion formed with a plurality of protrusions and a cylindrical boss portion, and an actuating link pivotally moved dependant on the movement of said cam. A cutter-holding member is provided to move upwardly and downwardly by the movement of actuating link transmitted via a linkage member and a swing arm. During the movement of the cutter-holding member, the cutter cooperates with a cutter-guiding member disposed adjacent to a side of needle-guiding member, in order to effect a simultaneous notching operation in sewing a curved portion of garment. The notching device further comprises a push rod having at one end a lever and at the other end a yoke. An actuating shaft is connected at one end to said yoke and has a roller at its other end. Depending upon the position of the lever the roller is moved upwardly or downwardly. When the roller engages said cam portion it is in a notching position, whereas when it engages said boss portion it is in a non-notching position.

REFERENCES:
patent: 4384540 (1983-05-01), Vollmar et al.

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