Sheet orienter using flap detection

Details Sheet orienter using flap detection Sheet orienter using flap detection

1984-07-11

1987-09-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250561, G01N 904, G06M 700

Patent

active

046911006

ABSTRACT:
There is a sorting apparatus for mixed envelopes according to whether or not the envelopes are face-up, and whether or not they are upside-down. Each envelope is carried lengthwise and a parallel light beam is radiated on the envelope from the right and left oblique directions with respect to the carrying direction of the envelope. When the light beam is radiated on the backside of the envelope from the upper side of the envelope, the shadow of the flap is formed on the envelope. Whether or not the envelope is face-up and whether or not the envelope is rightside-up is determined by this shadow detection.

REFERENCES:
patent: 4286149 (1981-08-01), Ben-Nathan et al.
patent: 4323786 (1982-04-01), Snow

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