Stitch correction method and apparatus for a sewing machine

Details Stitch correction method and apparatus for a sewing machine Stitch correction method and apparatus for a sewing machine

1983-10-06

1985-08-13

Nerbun, Peter

Sewing

Elements

Frames

11212111, 112315, D05B 1900, D05B 2722

Patent

active

045343047

ABSTRACT:
A photoelectric device on the head of a sewing machine detects the trailing edge of a fabric workpiece and initiates a count of pulses representing increments of the steps of displacement of the workpiece in stitch formations. Each step is subdivided into a plurality of segments which are represented by respective multiplicities of increments so that from a count of increments after detection of the reference point to a particular angular orientation of the arm shaft, a stitch combination can be drawn from a memory which will include stitches of an original length and stitches of a length reduced from the original by a fixed amount so that in the number of stitches of the selected combination the row will be completed to a certain distance from the reference edge.

REFERENCES:
patent: 4381719 (1983-05-01), Goldbeck
patent: 4403558 (1983-09-01), Martell et al.
patent: 4404919 (1983-09-01), Martell et al.

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