EP0159302B1 - Method and arrangement for heat treatment of a medium enclosed in a receptacle - Google Patents

Method and arrangement for heat treatment of a medium enclosed in a receptacle Download PDF

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Publication number
EP0159302B1
EP0159302B1 EP19850850115 EP85850115A EP0159302B1 EP 0159302 B1 EP0159302 B1 EP 0159302B1 EP 19850850115 EP19850850115 EP 19850850115 EP 85850115 A EP85850115 A EP 85850115A EP 0159302 B1 EP0159302 B1 EP 0159302B1
Authority
EP
European Patent Office
Prior art keywords
receptacle
medium
tray
liquid medium
vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19850850115
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0159302A1 (en
Inventor
Karl Ingvar Marten Martensson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Getinge AB
Original Assignee
Electrolux AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20355432&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0159302(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Electrolux AB filed Critical Electrolux AB
Publication of EP0159302A1 publication Critical patent/EP0159302A1/en
Application granted granted Critical
Publication of EP0159302B1 publication Critical patent/EP0159302B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/027—Packaging in aseptic chambers

Definitions

  • the invention relates to a method to heat and after that cool a first liquid medium in a pressure vessel by means of a second liquid medium, the first liquid medium being enclosed in a receptacle to a certain level above which a gaseous medium is enclosed in the receptacle, said second liquid medium being brought into contact with the outside of the receptacle and reaching temperatures at which the material of the wall of the receptacle becomes soft and strives at being deformed permanently by the gas pressure and the hydrostatic pressure of the media in the receptacle.
  • the invention also relates to an arrangement for carrying out the method to heat and after that cool a first liquid medium in a pressure vessel by means of a second liquid medium, the first liquid medium being enclosed in a receptacle to a certain level above which a gaseous medium is enclosed in the receptacle, said second liquid medium being brought into contact with the outside of the receptacle.
  • FR-A-1 325 455 which discloses a method and an arrangement of the kinds introductorily set forth shows an attempt to prevent said deformation by immersing a receptacle to be sterilized in a liquid to thereby balance the hydrostatic pressure acting inside the receptacle.
  • the receptacle is, however, completely immersed in the liquid when the sterilizing temperature is reached which means that the hydrostatic pressure outside the top part of the receptacle, which contains a gaseous medium, compresses and deforms that part of the receptacle.
  • the object of the invention is to substantially prevent deformation on all parts of the receptacle when it is heated and cooled with its liquid and gaseous media contents.
  • the second medium surrounds the receptacle to such a level that the hydrostatic pressure on both sides of the wall of the receptacle equalize each other, and at least when the material of the wall of the receptacle has said temperatures the gas pressure in the vessel outside the receptacle is kept equal to the gas pressure inside the receptacle, and by the arrangement according to the invention thereby that the vessel contains at least one tray on the bottom of which one or more receptacles are intended to be placed, each tray being filled with said second liquid medium to such a level that the hydrostatic pressures on both sides of the wall of the receptacle equalize each other, and by means for keeping the gas pressure in the vessel outside the receptacle equal to the gas pressure inside the receptacle.
  • By 10 is designated a closeable pressure vessel, in which two trays 12 and 14 are enclosed. Each tray is provided with a bottom 16, side walls 18 and a spillway 20 in the form of a pipe 21. In the respective tray a plurality of receptacles in the form of bottles 22 made of polyethylene are placed on a bottom plane 24. The bottles contain a liquid to a certain level 26.
  • the bottles 22 are heat treated by water circulated through the pressure vessel 10 by a pump 28 which pumps water collected on the bottom of the vessel through a heat exchanger 30 which heats the water, after which the water is sprayed onto the bottles in the upper tray 12 through nozzles 32. Openings 34 in the bottom of the tray 12 let out a part of the water but also see to it that the water in the tray rises to the level 36 of the spillway 20, which lets out the rest of the water supplied through the nozzles 32.
  • steam can be introduced through a valve 34 into the vessel 10 to heat the circulating water.
  • the object of the spillway 20 is to keep such a level 36 outside the bottles 22 that the hydrostatic pressures on both sides of the wall 38 of the bottle substantially equalize each other and substantially counteract the deformation, which the liquid in the bottle would have caused on the wall of the bottle if there had not been any liquid level on the outside of the bottle.
  • infusion solution i.e. a solution of medicaments in water, which solution has substantially the same density as water
  • infusion solution i.e. a solution of medicaments in water, which solution has substantially the same density as water
  • the level 36 of the water was kept equal to the level 26 of the infusion solution.
  • Grooves 40 were arranged in the bottom plane 24 to let in water under the convex bottom 42 of the bottle. The convex bottom 42 also maintained its form during the heat treatment.
  • the lower tray 14 is similar to and works in the same way as the upper tray 12.
  • the tray 14 is supplied with heat treating liquid from the upper tray 12.
  • the level 36 is kept substantially equal to the level 26. If the liquid in the bottles has a larger density than the heat treating liquid, the level 36 is suitably kept higher than the level 26, and if the liquid in the bottles has a smaller density than the heat treating liquid, the level 36 is suitably kept lower than the level 26 so that the deformation of the bottles shall become as small as possible.
  • the bottles are cooled, suitably thereby that water, cooled by the heat exchanger 30, is circulated through the vessel 10 via the nozzles 32.
  • a gaseous medium In the part 46 of the bottle, which is located above the level 26, a gaseous medium is enclosed, which strives to expand and thereby deform the bottle when the temperature rises. This expansion and deformation is counteracted by pressure air, which is introduced into the vessel 10 through a valve 48, such that the pressure in the vessel 10 is kept equal to the pressure in the part 46. Air and steam can be let out of the vessel 10 through another valve 50, such that the pressure in the vessel 10 does not become larger than the pressure in the part 46, in which case the bottle would be squeezed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Powder Metallurgy (AREA)
EP19850850115 1984-04-03 1985-03-29 Method and arrangement for heat treatment of a medium enclosed in a receptacle Expired EP0159302B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8401848A SE451540B (sv) 1984-04-03 1984-04-03 Sett och anordning att vermebehandla ett vetskeformigt medium som er inneslutet i en behallare
SE8401848 1984-04-03

Publications (2)

Publication Number Publication Date
EP0159302A1 EP0159302A1 (en) 1985-10-23
EP0159302B1 true EP0159302B1 (en) 1988-02-24

Family

ID=20355432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850850115 Expired EP0159302B1 (en) 1984-04-03 1985-03-29 Method and arrangement for heat treatment of a medium enclosed in a receptacle

Country Status (6)

Country Link
EP (1) EP0159302B1 (sv)
JP (1) JPS60228222A (sv)
AU (1) AU571953B2 (sv)
CA (1) CA1250403A (sv)
DE (1) DE3561647D1 (sv)
SE (1) SE451540B (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242701A (en) * 1988-10-24 1993-09-07 Fbi Brands Ltd. Method for shelf stable packaging of liquid food in hermetically sealed easy-to-open gable top cartons
CA1291092C (en) * 1988-03-11 1991-10-22 Donald A. Poole Easy opening gable top carton
JPH0487934A (ja) * 1990-07-16 1992-03-19 Hisaka Works Ltd プラスチック容器に収容の液のレトルト殺菌方法、装置並びにこれに用いる加熱滅菌用トレイ
US5283033A (en) * 1991-11-29 1994-02-01 Advanced Retort Systems, Inc. Process for sterilizing the contents of a sealed deformable package

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1325455A (fr) * 1962-06-18 1963-04-26 Duschek Gmbh Alois Procédé et dispositif pour la stérilisation sans déformation de récipients en matière synthétique fermés hermétiquement
FR2288481A1 (fr) * 1974-10-24 1976-05-21 Hanau Sa F Nouveaux procedes et appareillages de traitement thermique de produits contenus dans des recipients etanches
US4050894A (en) * 1975-02-25 1977-09-27 Mariano Rodriguez Genis Sterilizing and sterility maintaining apparatus for dental and surgical tools and the like

Also Published As

Publication number Publication date
AU571953B2 (en) 1988-04-28
DE3561647D1 (en) 1988-03-31
CA1250403A (en) 1989-02-28
SE451540B (sv) 1987-10-19
EP0159302A1 (en) 1985-10-23
JPS60228222A (ja) 1985-11-13
SE8401848L (sv) 1985-10-04
AU4047285A (en) 1985-10-10
SE8401848D0 (sv) 1984-04-03

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