Patent ID: 7589633

Claim:
A closed loop location detection system for use in monitoring simultaneously the presence or absence of objects in at least two locations in a manufacturing process, comprising at least one detectable element per location and adapted to be associated with a respective object to be monitored, and at least one detecting device adapted to detect the detectable elements of the objects and so determine whether objects are present in, or absent from, all of the locations being monitored wherein said closed loon location detection system uses RFID technology, said detection device comprising at least one antenna and said detectable element comprising at least one RF tag, and wherein said antenna is adapted to monitor more than one location, a position tag being associated with each location and means to deactivate said position tag being provided on each object, whereby when the object is fed to a given location, said means to deactivate, provided on said given object, cause said position tag associated with said given location to stop being detected by said antenna thereby determining that a specific object has been fed to a specific location.