Precise positioner of buttonhole presser foot

Details Precise positioner of buttonhole presser foot Precise positioner of buttonhole presser foot

1980-02-29

1981-01-06

Nerbun, Peter P.

Sewing

Elements

Frames

D05B 306

Patent

active

042429765

ABSTRACT:
For a zigzag sewing machine having a buttonhole presser device allowing formation of a buttonhole in a single step, a method for insuring that the presser device is in its initiating position by determining where the movable portion of the presser device is and, if it is not in its correct position, to adjust feeding action required to move it to its correct position.

REFERENCES:
patent: 4181087 (1980-01-01), Brauch et al.
patent: 4196680 (1980-04-01), Edwards

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