Stepper driven stitch patterning mechanism for sewing machines u

Details Stepper driven stitch patterning mechanism for sewing machines u Stepper driven stitch patterning mechanism for sewing machines u

1989-02-01

1989-10-17

Falik, Andrew M.

Sewing

Stitch forming

Zigzag

112220, 112455, 74569, D05B 302

Patent

active

048739324

ABSTRACT:
A sewing machine employing a stepper driven-stitch patterning mechanism including a stepper rotated cam with a spiral cam groove tracked by a follower formed with different cross sectional shape than the cam groove in order to provide only point contact with each side of the cam groove when spring biased therein. A spring arrangement biases the cam and follower together in a direction perpendicular to the axis of cam rotation, thus minimizing lost motion between cam and follower.

REFERENCES:
patent: 4131075 (1978-12-01), Wurst
patent: 4196683 (1980-04-01), Eguchi
patent: 4559887 (1985-12-01), Sano

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