Method and apparatus for verifying whether documents have been s

Details Method and apparatus for verifying whether documents have been s Method and apparatus for verifying whether documents have been s

1996-09-04

1997-08-12

Terrell, William E.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Condition responsive means controls separating means

209900, 271263, 27126504, 53 52, 533815, 53492, 53504, 324230, B07C 512, B65H 712

Patent

active

056556683

ABSTRACT:
A method and apparatus for checking whether documents have been separated from an opened envelope includes conveying an envelope past an input transducer which measures a characteristic, based on light shown through the envelope, of each individual envelope along a measuring path parallel to the direction of movement of the envelope. From the measured characteristic, a value profile is determined, from which a reference value for each envelope is determined. The value profile is used then to calculate an extreme limit value for each envelope. An envelope-suspect signal is generated if the value profile lies beyond the limit value over a specified minimum substantially continuous measuring distance. The system calculates the values for each envelope, and accordingly, envelopes of greatly diverse characteristics may be reliably checked in random order.

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