Apparatus for detecting tape on sheets

Details Apparatus for detecting tape on sheets Apparatus for detecting tape on sheets

1982-08-11

1985-06-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, 356446, G01H 2188

Patent

active

045256306

ABSTRACT:
Apparatus is disclosed for detecting the presence of shiny tape on a printed note, for example a banknote. An optical fibre fishtail array supplies visible light from a source (A) to a lengthwise strip of the banknote. A first array of photodetectors (D) detects light specularly reflected from a plurality of adjacent regions of the said strip, while a second array (B) arranged parallel to the first array (D) detects light reflected diffusely from corresponding ones of the said regions. An analyzing circuit receives signals from the photodetectors and indicates when the ratio of specularly reflected light from an illuminated element of the banknote to diffusely reflected light from the same element exceeds a predetermined value.

REFERENCES:
patent: 3806256 (1974-04-01), Ishak
patent: 4162126 (1979-07-01), Nakagawa
patent: 4298807 (1981-11-01), Favre
patent: 4409477 (1983-10-01), Carl

Affiliated with

Also associated with

Rating

Apparatus for detecting tape on sheets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for detecting tape on sheets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting tape on sheets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-556395