Process for maturing meat products

{
  "publication_number": "US5919506A",
  "country": "US",
  "kind": "A",
  "title": "Process for maturing meat products",
  "abstract": "A process for maturing meat products, in particular pork products, such as ham, \"coppa\", bacon, sausage and the like, characterized in that the product is let in a substantially sealed environment at less than atmospheric pressure, heat being supplied to the product to compensate the heat lost by evaporation of its intrinsic water and to maintain its temperature within a predetermined range of values.",
  "claims": [
    "1. A process for maturing meat products which comprises: processing said meat products in a sealed environment of less than atmospheric pressure to evaporate intrinsic water, and supplying heat to said meat products in an environment of substantially atmospheric pressure to compensate for heat lost through the evaporation of the intrinsic water from the products and to maintain its temperature within a predetermined range, thereby maturing the meat products.",
    "2. The maturing process as claimed in claim 1, wherein heat is supplied to the meat product by means of a microwave field.",
    "3. The maturing process as claimed in claim 2, wherein said microwave field has a frequency within the range of between 500 and 5000 MHz.",
    "4. The maturing process as claimed in claim 2, wherein the heat is supplied to the meat product during a time period followed by a rest period when heat is not provided.",
    "5. The maturing process as claimed in claim 2, divided into cycles, each of which comprises a long phase during which the product is left in an environment under vacuum, and a short phase during which heat is supplied to the product by a microwave field while the environment is at substantially atmospheric pressure.",
    "6. The process of claim 1, wherein the temperature of the product is maintained within the range of 22 to 25° C.",
    "7. The process of claim 5, comprising a plurality of cycles.",
    "8. The process of claim 1, wherein the processing step is conducted at a pressure of 10 to 40 mm Hg.",
    "9. The process of claim 4, wherein a plurality of heat periods and rest periods are alternately conducted.",
    "10. The process of claim 1, wherein the processing of the products is conducted for 3-4 hours wherein the heating of the products is conducted for at least one minute.",
    "11. The process of claim 1, wherein by alternately processing the meat products in an environment of less than atmospheric pressure and heating the meat products in an environment of substantially atmospheric pressure, the meat products undergo alternating compression and expansion cycles which massages the meat products which improves the escape of the intrinsic water and produces a more uniform distribution of salts and flavoring."
  ],
  "description_excerpt": "The present invention relates to a process and apparatus for the maturing of meat products, in particular pork products, such as ham, \"coppa\", bacon, sausage and the like.\n\nIt has been known from prehistoric times to preserve meat by subjecting it (possibly after salting and/or flavoring) to maturing, ie drying to reduce its intrinsic water.\n\nIt is currently known, as it has been for a considerable time, to permit the products to mature in environments in which the microclimate is kept artificially under control to maintain the temperature and humidity within optimum constant ranges.\n\nSuch methods ensure that the product does not degrade, however they involve relatively lengthy processing times. For example, ham requires as a minimum many months of maturing.\n\nAn object of the present invention is to considerably accelerate the maturing process.\n\nThis and other objects are attained by the present invention as characterised in the appendant claims.\n\nThe present invention is based on the concept of leaving the product in a substantially sealed environment at a pressure of less than one atmosphere so that its intrinsic water evaporates relatively quickly, and supplying the product with heat to compensate for the heat lost by evaporation of the intrinsic water and hence maintaining its temperature within a predetermined range of typically between 22 and 25° C.\n\nA further important aspect of the present invention is that the heat is supplied to the product by a microwave field which rapidly heats the product from its inside. Advantageously, the microwave field has a frequency of between 500 and 5000 MHz.",
  "cpc": [
    "A23B 4/01",
    "A23B 4/00",
    "A23B 4/031"
  ],
  "ipc": [
    "A23B 4/00",
    "A23B 4/01",
    "A23B 4/03"
  ],
  "assignees": [
    "IPI Impianti e Processi Innovativi Srl"
  ],
  "inventors": [
    "Giovanni Ruozzi"
  ],
  "filing_date": "1997-06-13",
  "publication_date": "1999-07-06",
  "grant_date": "1999-07-06",
  "priority_date": "1996-06-13",
  "application_number": "US-87474097-A",
  "family_id": "11398903",
  "cited_by_count": 11,
  "citations": [
    "US3321314A",
    "US4168418A",
    "SU1097252A1",
    "SU1099935A1",
    "US4619054A",
    "DE3912071A1"
  ]
}