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Self-warming container for precooked foods

  • US 3,871,357 A
  • Filed: 10/10/1973
  • Issued: 03/18/1975
  • Est. Priority Date: 08/03/1973
  • Status: Expired due to Term
First Claim
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1. A self-warming container for precooked foods of the kind operating by means of an exothermic reaction between a chemical reactant and water disposed within the container comprising a closed envelope within the container containing the water, an exothermic hydratable chemical reactant located within the container for contact with the water when the envelope is opened and in an amount sufficient to heat the food when contacted with the water, a cutting blade adapted to open the envelope, a sliding control strip inside the container supporting said cutting blade, a guide for said control strip to move said cutting blade over said envelope, a tongue on said control strip extending outside the container, said guide for the control strip being a sheet adhesively secured to the envelope along two lateral zones leaving an unadhered central zone between the envelope and the guide, said control strip being situated in said central zone to be held in contact with the envelope whereby said control strip may be engaged by its tongue and pulled to move the strip in the central zone and cause the cutting blade to open the envelope to free the water for contact with the calcium oxide within the container.

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