Optics: measuring and testing – By monitoring of webs or thread – For flaws or imperfections
Patent
1993-05-20
1995-06-20
McGraw, Vincent P.
Optics: measuring and testing
By monitoring of webs or thread
For flaws or imperfections
250572, 356402, G01N 2189
Patent
active
054265096
ABSTRACT:
A device for detecting contaminant particles on a surface of a monochrome web of material of a first color imprinted with a second color different from said first color comprises a frame member with a feed roll of said web material and a takeup roll, with the web material passing from said feed roll to said takeup roll past an inspection stage between the feed roll and takeup roll. The inspection stage has a light detecting means mounted on it for collecting light transversely from the web as the web moves past the inspection stage. The light detecting means is communicated to a light analyzing means to observe variations in the collected light and the light analyzing means is communicated to a means for indicating that a variation beyond a threshold amount has been observed by the light analyzing means. In preferred embodiment, the light collected by the light detecting device is passed through a filter immediately prior to collection in said light detection device, said filter selected so that said first color is indistinguishable from said second color after passage through the filter.
REFERENCES:
patent: 3479518 (1969-11-01), Akamatsu et al.
patent: 3480786 (1969-11-01), Kottman
patent: 4160601 (1979-07-01), Jacobs
patent: 4320967 (1982-03-01), Edgar
patent: 4538912 (1985-09-01), Shaw
patent: 4550433 (1985-10-01), Takahashi
patent: 4556903 (1985-12-01), Blitchington
patent: 4739176 (1988-04-01), Allen et al.
patent: 4861164 (1989-08-01), West
patent: 4898471 (1990-02-01), Stomestrom
patent: 4976540 (1990-12-01), Kitamura
patent: 4991970 (1991-02-01), Darboux et al.
patent: 4992949 (1991-02-01), Arden
patent: 5062707 (1991-11-01), Adler-Golden
patent: 5072128 (1991-12-01), Hayano
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