Apparatus for seeking faults in wide material webs

Details Apparatus for seeking faults in wide material webs Apparatus for seeking faults in wide material webs

1982-06-16

1985-02-19

Rosenberger, R. A.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250572, G01N 2188, G01M 1108

Patent

active

045002088

ABSTRACT:
A fault seeking apparatus for detecting faults in carpet webs (15) has a first main mirror wheel (17) which is illuminated by a laser beam (18) and which generates via a concave mirror (13), a scanning beam (14) which is periodically displaced parallel to itself. This scanning beam is directed at an angle to several subsidiary mirror wheels (11a to 11i) which are arranged alongside one another, which rotate substantially faster than the main mirror wheel (17) and which generate a scanning light strip on the carpet web (15). A light receiving device consisting of lenses (20a to 20i) arranged alongside one another and a light conducting rod (22) with a photomultiplier (23) at one end face is arranged on the other side of the carpet web (15) (FIG. 1).

REFERENCES:
patent: 3135867 (1964-06-01), Daneff
patent: 3760184 (1973-09-01), Brose
patent: 4004153 (1977-01-01), Obser et al.
patent: 4260899 (1981-04-01), Baker
patent: 4302105 (1981-11-01), Sick
patent: 4357071 (1982-11-01), Mankel et al.
patent: 4431309 (1984-02-01), Sick et al.

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