Optical paper detector

Details Optical paper detector Optical paper detector

1980-09-11

1983-07-26

McGraw, Vincent P.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250572, 2502221, G01N 2189, G01B 1106

Patent

active

043951279

ABSTRACT:
An optical paper detector for use in conjunction with a printing press for sensing the undesirable condition of more than a single sheet of paper being simultaneously fed to the press. The optical paper detector is comprised of an array of wide angle phototransistors connected in parallel which uniformly sense light transmittance through the paper over a relatively large and continuous area to provide an averaging effect so that the optical paper detector is relatively insensitive to local variations in light transmittance. The optical paper detector is equipped with a flat cover that permits flush mounting and provides a self-cleaning wiping action.

REFERENCES:
patent: 3589816 (1971-06-01), Sugaya
patent: 3873843 (1975-03-01), Martin
patent: 3891857 (1975-06-01), Wiklund
patent: 3922557 (1975-11-01), Carnes, Jr.
patent: 4194840 (1980-03-01), Lucas et al.

Affiliated with

Also associated with

Rating

Optical paper detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical paper detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical paper detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2219698