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Methods for presevation of foodstuffs

  • US 5,034,235 A
  • Filed: 06/08/1989
  • Issued: 07/23/1991
  • Est. Priority Date: 11/23/1983
  • Status: Expired due to Term
First Claim
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1. A method of aseptic packaging of foodstuffs, comprising the steps of:

  • providing an aseptic packaging material having a foodstuff contacting surface intended to form at least part of an interior surface of a sealed foodstuff container;

    applying to said foodstuff contacting surface a plurality of high intensity polychromatic, incoherent light pulses each light pulse having a duration in the range of from about 0.001 milliseconds to about 100 milliseconds, each light pulse having an energy density at said foodstuff contacting surface in the range of from about 0.01 joules per square centimeter to about 50 joules per square centimeter and each light pulse having an energy distribution such that at least about 70% of its energy is in the wavelength range from about 170 nanometers to about 2600 nanometers to provide a sterilized foodstuff contacting surface;

    providing a sterilized foodstuff to be packaged;

    introducing said sterilized foodstuff into contact with said sterilized foodstuff contacting surface while excluding microorganisms from contact with said sterilized foodstuff and said sterilized foodstuff contacting surface; and

    sealing said aseptic packaging material to provide a sealed aseptically packaged foodstuff product.

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