Image analysis – Applications – Mail processing
Patent
1993-05-17
1999-06-15
Johns, Andrew W.
Image analysis
Applications
Mail processing
G06K 900
Patent
active
059129794
ABSTRACT:
A method and apparatus for document surveillance along a transport path in a mail sorting machine includes using a plurality of sequentially positioned photocells affixed along the transport path to detect document separation and jamming events through the application of assigned document identification and message transfer schemes whereby one sensor detects an edge of the document and transfers the document identifier and a shaft encoder count to the next sensor along the transport path in the form of a message. A message queue for each sensor is maintained to detect improper document leading edge and trailing edge conditions. A series of surveillance modules operates on a multi-tasking basis through a primary master processor.
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Bell & Howell Mail Processing Systems Co.
Johns Andrew W.
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