PROCESS AND ARRANGEMENT FOR TESTING BOTTLES FOR THE PRESENCE OF CONTAMINATION

摘要

To detect contamination in used PET returnable bottles, they are fed to a first testing station which takes a gas sample from each bottle. This first testing station tests for the presence of heavy contamination. Heavily contaminated bottles are identified as dirty. The bottles are then fed to a second testing station which takes a gas sample from the clean bottles and tests it for contamination, with a lower detection threshold. Bottles detected here as contaminated are removed, as are the bottles which fail the first test. The two-stage process allows testing with greater sensitivity while maintaining a high bottle throughput.