Measuring and testing – Inspecting
Patent
1993-07-07
1996-05-28
Raevis, Robert
Measuring and testing
Inspecting
209523, 7386473, G01N 3506
Patent
active
055200605
ABSTRACT:
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 gas samples from the clean bottles and tests them 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.
REFERENCES:
patent: 3094219 (1963-06-01), Wyman et al.
patent: 3211290 (1965-10-01), Strickling
patent: 4368980 (1983-01-01), Aldred et al.
patent: 4858767 (1989-08-01), Meyers et al.
patent: 5067616 (1991-11-01), Plester et al.
patent: 5350565 (1994-09-01), Leveson et al.
Gysi Peter
Huesser Theo
Mueller Martin
Robertson Peter M.
van der Schaar Felix
Elpatronic AG
Raevis Robert
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