Sewing machine with a cloth-edge detector

Details Sewing machine with a cloth-edge detector Sewing machine with a cloth-edge detector

1989-02-16

1990-05-15

Nerbun, Peter

Sewing

Elements

Starting or stopping

112277, 250561, D05B 6918

Patent

active

049247905

ABSTRACT:
A sewing machine with a cloth-edge detector has a light source for casting light on a sensing point on a cloth, and a light receiver for generating an intensity signal according to the intensity of the received light. Before sewing, a reference signal is set at an average of two intensity signals that are gauged before and after a cloth edge. The cloth edge can be detected by comparing the intensity signal from the light receiver with the reference signal.

REFERENCES:
patent: 4565140 (1986-01-01), Martell et al.
patent: 4574719 (1986-03-01), Balke
patent: 4696246 (1987-09-01), Rohr et al.

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