Method for detecting pin holes and the like in sheet material fo

Details Method for detecting pin holes and the like in sheet material fo Method for detecting pin holes and the like in sheet material fo

1982-08-11

1985-08-27

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

250572, G01N 2189

Patent

active

045375054

ABSTRACT:
This disclosure is concerned with the optical detection of pin holes or similar aberrations in sheet material, such as metal or metalized packaging materials that are to enclose and seal contents therewithin, with the aid of a reflective-wall cavity structure over which the sheet material is placed and light-sealed and the walls of which are shaped to enable external light leaking through the pin hole or the like to become multiply reflected from the cavity walls and the underside of the sheet to impinge upon photodetecting means at an appropriate portion of the walls, thus to enable detection of such leak, and, if desired, location of the pin hole or the like.

REFERENCES:
patent: 2444442 (1948-07-01), Herbold
patent: 3422272 (1969-01-01), Brosious et al.
patent: 3541340 (1970-11-01), Binks
patent: 3710129 (1973-01-01), Gibson
patent: 3991882 (1976-11-01), Fahnestock et al.
patent: 4120582 (1978-10-01), DeVries et al.

Affiliated with

Also associated with

Rating

Method for detecting pin holes and the like in sheet material fo 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 for detecting pin holes and the like in sheet material fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting pin holes and the like in sheet material fo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1999604