Seam-detecting device for interconnected sections of sheet mater

Details Seam-detecting device for interconnected sections of sheet mater Seam-detecting device for interconnected sections of sheet mater

1983-05-12

1985-02-12

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33174L, 340675, G01B 706

Patent

active

044982402

ABSTRACT:
A device for detecting transverse seams at the junctions of interconnected sections of fabric, paper or other sheet material, advancing continuously past a treatment station, comprises a plurality of sensors in the form of potentiometers whose sliders are provided with rollers contacting the sheet surface at transversely spaced locations which may also be relatively offset in the direction of travel. The output signals of the several potentiometers are compared in an evaluator which distinguishes actual seams from surface irregularities or from thickness variations forming part of a certain pattern. The evaluator includes signal-storing means facilitating the detection of seams deviating within given limits from a transverse line.

REFERENCES:
patent: 2798912 (1957-07-01), Lindemann et al.
patent: 3316760 (1967-05-01), Ward
patent: 3363458 (1968-01-01), Scharf et al.
patent: 3553668 (1971-01-01), Urmenyi
patent: 3680215 (1972-08-01), Plough
patent: 4408487 (1983-10-01), Tano
patent: 4426785 (1984-01-01), Loftus et al.

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