Apparatus for detection of an imperfect seal and method therefor

Details Apparatus for detection of an imperfect seal and method therefor Apparatus for detection of an imperfect seal and method therefor

1992-04-02

1993-11-09

Rosenberger, Richard A.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

356239, 250562, 219 1053, 358106, G01N 2188, G01N 2189

Patent

active

052607666

ABSTRACT:
An apparatus and method for detection of an imperfect seal between a plurality of plastic sheets. A transparent heated seal bar is tightly applied against the plurality of plastic sheets with the heat producing a welding between the sheets. A light source is projected into the seal bar with reflection occurring back through the seal bar from the seal area producing an image. This image is then picked up by a camera and transmitted to a visual analyzing computer which compares the produced seal to an image of a perfect seal and if significant differences are noted the computer causes activation of an annunciator to make known the creation of the imperfect seal.

REFERENCES:
patent: 3941485 (1976-03-01), Madden
patent: 4242702 (1980-12-01), Kuni et al.
patent: 4496819 (1985-01-01), Acker et al.
patent: 5184190 (1993-02-01), Rai et al.

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