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An automatic
print/applicator encodes, prints, and applies the RFID tag to the case as it
proceeds down the conveyor. The print/applicator selected for this
implementation employs a “pre-reject and apply” methodology which ensures that
bad tags never make it onto a case. An RFID antenna is mounted on the conveyor
immediately following the print/applicator to confirm that the RFID tag is still
readable after being applied to the case. This ensures that only good readable
RFID tags are loaded onto a pallet at the end of the production conveyor. The
case passes in front of a photo cell which is mounted prior to the conveyor
antenna. Movement
activates the reader to read the EPC number of the case tag.
When a pallet is fully loaded, it is forwarded to a stretch wrapper for
wrapping. After it is stretch wrapped, the pallet passes in front of a photo
cell which is mounted prior to the RFID aggregation portal. The photo cell is
monitored by the RFID middleware. Movement activates the RFID reader for the
pallet case reads. Another photo cell is mounted after the RFID portal and
terminates the RFID reader when a pallet has exited the portal. All reads are
captured by the middleware and passed to the iSeries for processing. The
middleware illuminates the green light on the light stack when it receives a
positive response from the iSeries. The red light is illuminated if a negative
response is received and the case with the bad tag is diverted to a stretch of
rejection conveyor. A nearby IP workstation displays all tag reads and
iSeries responses so the line operator can resolve any issue that may arise
during aggregation. |