Method and apparatus for detecting sewing defects on a stocking

Details Method and apparatus for detecting sewing defects on a stocking Method and apparatus for detecting sewing defects on a stocking

1980-02-25

1982-08-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250572, G01N 2188

Patent

active

043439985

ABSTRACT:
Three sets of photoelectric sensors are arranged either in combination or solely re the path of travel of the toe section of a closed stocking on a sewing machine in order to detect presence of sewing defects such as skip sewing, spot sewing and/or foreign material inclusion. Accidental supply of stockings with sewing defects to market is well prevented in a completely automatic manner without any substantial rise in production cost.

REFERENCES:
patent: 2812447 (1957-11-01), Mac Martin et al.
patent: 3436555 (1969-04-01), Foster
patent: 3588513 (1971-06-01), Takatsuki
patent: 3812348 (1974-05-01), Lippke
patent: 4258267 (1981-03-01), Feldkamper

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