CONVEYOR SYSTEM AND METHOD FOR ACCUMULATING PACKAGES OF VARYING LENGTHS
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United States of America Patent
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app pub date -
Feb 9, 2011
filing date -
Jun 7, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A drive controller for controlling movement of a plurality of packages by an accumulation conveyor. The drive controller is configured to determine a length of each of the packages and to coordinate driving of a number of zones needed to accommodate the package. For example, a sensor in each of the conveyor zones communicates blockage by the packages to the drive controller. The drive controller determines a sequence of blockage of the sensors in adjacent zones. Blockage of the sensor in an upstream zone before the sensor in a downstream zone indicates an oversized package that extends longer than a zone length of the downstream zone and into the upstream zone. The drive controller is configured to drive the downstream zone and upstream zone simultaneously when detecting the oversized package.
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