Method and apparatus for inspecting web surface

Details Method and apparatus for inspecting web surface Method and apparatus for inspecting web surface

1985-08-13

1987-11-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356444, G01N 2188

Patent

active

047091576

ABSTRACT:
Method and apparatus for inspecting a surface having a photosensitive layer on a wide film web from which lateral margins are slit away, by detecting defects of the photosensitive layer of the surfaces of the lateral margins. The intensity of a line of light which is projected onto a lateral margin of the web is modulated by the surface of the lateral margin and received by reflection by a line sensor for producing an analog video signal which in turn is converted into two binary signals of high and low output levels. From the combination of the two binary signals, the presence of a defect is detected, because the intensity of the modulated reflected light will vary from a value characteristic of the absence of a defect.

REFERENCES:
patent: 4410278 (1983-10-01), Makihira et al.
patent: 4432013 (1984-02-01), Miller et al.
patent: 4486777 (1984-12-01), Yamamura
patent: 4507564 (1985-03-01), Shimada
patent: 4549206 (1985-10-01), Suzuki et al.
patent: 4553838 (1985-11-01), Madsen

Affiliated with

Also associated with

Rating

Method and apparatus for inspecting web surface does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for inspecting web surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for inspecting web surface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2424525