Method of producing patterns of zigzag stitches

Details Method of producing patterns of zigzag stitches Method of producing patterns of zigzag stitches

1985-02-22

1986-07-15

Nerbun, Peter

Sewing

Elements

Frames

112456, 112458, D05B 302

Patent

active

045999597

ABSTRACT:
In stitching operation with an electronic sewing machine storing a plurality of stitch control data, a fabric feeding amount for a specific pattern composed of densely arranged zigzag stitches is automatically controlled in a selective one of normal mode and alternate mode. The fabric feeding amount is usually controlled in the normal mode whereby a fabric feeding amount of a predetermined value or a manually selected value is constantly applied to every stitch of the pattern. The normal feed control mode is switched to the alternate feed control mode when the operator selects a fabric feeding amount smaller than a predetermined critical value, in which case the selected pattern composed of densely arranged zigzag stitches is produced with the fabric being fed in an amount double the selected value each time an alternate one of the zigzag stitches is produced. In the alternate feed control mode, a fabric feeding amount to be applied to the first stitch of the pattern is zero or of a value double the selected amount, which is determined depending upon the shape of the pattern and the needle position at the first stitch of the pattern.

REFERENCES:
patent: 4177744 (1979-12-01), Wurst et al.
patent: 4342271 (1982-08-01), Socha
patent: 4416209 (1983-11-01), Susumu

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