Detection of faults in sheet and like materials

Details Detection of faults in sheet and like materials Detection of faults in sheet and like materials

1980-01-31

1982-07-06

Rosenberger, R. A.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250572, 356238, G01N 2119

Patent

active

043380328

ABSTRACT:
Faults can be detected in sheet material, particularly in tufted fabric during manufacture of same, by scanning a surface of the material with an electrical scanning device which produces an electrical output representative of characteristics of the scanned surface. The electrical output is monitored to detect deviations from a norm representative of a fault condition. The scanning may be effected with a scanning device, comprising for example a light receiver which picks up reflected or transmitted light from the material, which is moved across the sheet transversely to the direction of advancement of the sheet.

REFERENCES:
patent: 3160759 (1964-12-01), Ward
patent: 3305687 (1967-02-01), Vinzelberg et al.
patent: 3308658 (1967-03-01), Bryan
patent: 3589816 (1971-06-01), Sugaya
patent: 3596274 (1971-07-01), Heringhaus
patent: 3871773 (1975-03-01), Shaw
patent: 3909103 (1975-09-01), Graves et al.

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