Each individual scanning entity includes a scanning system having a decoder for decoding {HEAD ~ scanned bar code information} and {TAIL ~ a printhead defect identifier} for identifying printhead defects from scanned bar code information that cannot be decoded and for constructing printhead defect models for use in correcting future bar code scans 
Each individual scanning entity includes a scanning system having a decoder for decoding { HEAD ~ scanned bar code information } and { TAIL ~ a printhead defect identifier } for identifying printhead defects from scanned bar code information that can not be decoded and for constructing printhead defect models for use in correcting future bar code scans
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH