Optical fault seeking apparatus for webs

Details Optical fault seeking apparatus for webs Optical fault seeking apparatus for webs

1984-05-24

1986-05-27

Beck, Shrive P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356431, G01N 2188

Patent

active

045917264

ABSTRACT:
In an optical fault seeking apparatus for webs moved in their longitudinal direction there is provided an optical scanning arrangement which generates a light bead on the surface of the web which moves transversely to the direction of the movement of the web. The scanning arrangement generates several light traces (12, 13, 14) which are displaced in the direction of advance and are parallel to one another. A light receiving arrangement (15) for each light trace has a photoelectric receiver (16, 19; 17, 20; 18, 21). The light traces (12, 13, 14) either adjoin one another or have a distance such that after the passage of the web (22) past all the light traces (12, 13, 14) each web region has been detected once by one scanning light bead (FIG. 1).

REFERENCES:
patent: 4110047 (1978-08-01), Takahashi
patent: 4260899 (1981-04-01), Baker
patent: 4401893 (1983-08-01), Dehuysser
patent: 4455086 (1984-06-01), West
patent: 4500208 (1985-02-01), Sick

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