Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Signalling – indicating – or display means
Patent
1981-04-02
1983-06-07
Knowles, Allen N.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Signalling, indicating, or display means
209579, 250563, 250572, 2503581, 356237, B07C 500
Patent
active
043867073
ABSTRACT:
A system for non-destructive, non-contacting use for detecting imperfections in multi-layered supply rolls of wound plastic film comprises a laser which scans the length of the particular roll being inspected with a photo-electric detector at a fixed reference angle which picks up reflected unimpeded and scattered light plus associated indicating and/or recording equipment. Defects in the roll, particularly those related to the upper longitudinal surface thereof, cause light scattering which decreases the signal strength to the indicator or recorder, thus noting the presence of a wrinkle or the like imperfection in the film roll.
REFERENCES:
patent: 3565536 (1971-02-01), Wuellner et al.
patent: 3652863 (1972-03-01), Gaskell et al.
patent: 3690774 (1972-09-01), Kottle et al.
patent: 3804534 (1974-04-01), Clarke
patent: 3812349 (1974-05-01), Gugliotta
patent: 3843890 (1974-10-01), Anthony, Jr. et al.
patent: 4136779 (1979-01-01), Bieringer
patent: 4162125 (1979-07-01), Schmidt
patent: 4208126 (1980-06-01), Cheo et al.
Ingraham R. B.
Knowles Allen N.
The Dow Chemical Company
LandOfFree
Laser beam imperfection detection for plastic film rolls does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser beam imperfection detection for plastic film rolls, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser beam imperfection detection for plastic film rolls will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2339700