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Detection of contaminants in food

  • US 6,270,724 B1
  • Filed: 04/07/1999
  • Issued: 08/07/2001
  • Est. Priority Date: 01/11/1996
  • Status: Expired due to Fees
First Claim
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1. A food contamination detector for identifying the presence of conditions indicative of contamination in food comprising:

  • a first bar code symbol coded to identify a food product by a bar code reader;

    a second bar code symbol coded to identify contaminated food by a bar code reader;

    an indicator bound to a substrate wherein the indicator is in communication with the gases and vapors from the food; and

    means for changing the appearance of the indicator when a condition indicative of contamination is present in the gases and vapors from the food, wherein the change in the appearance of the indicator causes the first bar code symbol to become unreadable by a bar code reader and causes the second bar code symbol to become readable by a bar code reader to identify food contamination.

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