Pattern sensor for sewing machine feed adusting system

Details Pattern sensor for sewing machine feed adusting system Pattern sensor for sewing machine feed adusting system

1987-08-11

1988-08-30

Nerbun, Peter

Sewing

Stitch forming

Feeding work material

112153, 112320, D05B 2706, D05B 2708

Patent

active

047668288

ABSTRACT:
A pattern sensor installed in a sewing machine for sensing patterns on two opposing sheets of cloth so that the patterns on the separate cloths are correctly aligned while sewing. The sensor is composed of a sensor head disposed between the two sheets of cloth, a light source, a light receiver, two light conduits including bundles of thin optical fibers, and a reflector which is composed of two prisms provided in the sensor head. The light emitted from the light source is transmitted via separate conduits and respectively enters the prisms. One beam is reflected upward toward the upper cloth, and the other is reflected downward toward the lower cloth for sensing the patterns. The light reflected on each cloth returns to the light receiver via the reverse route to be processed as a pattern signal.

REFERENCES:
patent: 3954071 (1976-05-01), Mall et al.
patent: 4342273 (1982-08-01), Petzold
patent: 4612867 (1986-09-01), Rosch et al.
patent: 4658741 (1987-04-01), Jehle et al.

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