Apparatus for detecting untreated postage stamps in a machine

Details Apparatus for detecting untreated postage stamps in a machine Apparatus for detecting untreated postage stamps in a machine

G - Physics

07

D

354/57

G07D 7/00 (2006.01) B07C 3/14 (2006.01)

Patent

CA 1109963

Abstract of the Disclosure The apparatus for detecting a perforated postage stamp on envelopes travelling in a given direction comprises a light source to illuminate the teeth of a perforated edge of the stamp at a right angle to the given direction; a scanning device receiving light from the illuminated edge of the stamp and producing a high frequency pulse train responsive to scanning the teeth of the illuminated edge of the stamp; and an evaluating circuit responsive to the pulse train to provide an indication of the presence of the stamp.

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