EP0159302A1 - 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 PDFInfo
- Publication number
- EP0159302A1 EP0159302A1 EP85850115A EP85850115A EP0159302A1 EP 0159302 A1 EP0159302 A1 EP 0159302A1 EP 85850115 A EP85850115 A EP 85850115A EP 85850115 A EP85850115 A EP 85850115A EP 0159302 A1 EP0159302 A1 EP 0159302A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- receptacle
- medium
- tray
- level
- enclosed
- 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.)
- Granted
Links
Images
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
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)
Abstract
Description
- The invention relates to a method to heat and after that cool a first liquid medium, which is enclosed in a receptacle to a certain level, above which a gaseous medium is enclosed in the receptacle, by means of a second liquid medium, which is brought into contact with the outside of the receptacle and which reaches 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 enclosed in a receptacle by means of a second liquid medium which is brought into contact with the outside of the receptacle, and comprising a bottom on which one or more such receptacles are intended to be placed.
- It is known to sterilize a liquid in a receptacle of polyethylene plastic in an autoclave by heating the outside of the receptacle, and thereby the liquid, by means of a heated liquid, which is sprayed onto the receptacle. Such a receptacle can be heated to maximally about 110 °C. At a higher temperature the plastic becomes so soft that the receptacle loses its form completely.
- Already before the receptacle reaches 110 C the plastic begins to soften, which results in that the hydrostatic pressure in the receptacle deforms the receptacle. An originally cylindric, standing receptacle will after treating to 110 °C get a conical form, which becomes wider at the bottom. The bottom of the receptacle will also form after the bed, on which the receptacle stands.
- The object of the invention is to substantially prevent said deformation as a consequence of the gas pressure and the hydrostatic pressure in the receptacle.
- This object is attained by the method according to the invention thereby that it has obtained the characterizing features stated in Claim 1 and by the arrangement according to the invention thereby that it has obtained the characterizing features stated in Claim 2.
- A method and an arrangement according to the invention are described below with reference to the accompanying drawing, which shows an embodiment of an arrangement according to the invention.
- By 10 is designated a closeable pressure vessel, in which two
trays bottom 16,side walls 18 and aspillway 20 in the form of apipe 21. In the respective tray a plurality of receptacles in the form ofbottles 22 made of polyethylene are placed on abottom plane 24. The bottles contain a liquid to acertain level 26. - The
bottles 22 are heat treated by water circulated through thepressure vessel 10 by apump 28 which pumps water collected on the bottom of the vessel through aheat exchanger 30 which heats the water, after which the water is sprayed onto the bottles in theupper tray 12 throughnozzles 32. Openings 34 in the bottom of thetray 12 let out a part of the water but also see to it that the water in the tray rises to thelevel 36 of thespillway 20, which lets out the rest of the water supplied through thenozzles 32. - As a complement or an alternative to the
heat exchanger 30 steam can be introduced through avalve 34 into thevessel 10 to heat the circulating water. - The object of the
spillway 20 is to keep such alevel 36 outside thebottles 22 that the hydrostatic pressures on both sides of thewall 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. - On testing cylindrical polyethylene bottles containing so-called infusion solution, i.e. a solution of medicaments in water, which solution has substantially the same density as water, it has proved that the bottles substantitally maintain their cylindrical form and their measures during a heat treatment up to 110 °C. At the test the
level 36 of the water was kept equal to thelevel 26 of the infusion solution.Grooves 40 were arranged in thebottom plane 24 to let in water under theconvex bottom 42 of the bottle. Theconvex bottom 42 also maintained its form during the heat treatment. - The
lower tray 14 is similar to and works in the same way as theupper tray 12. Thetray 14 is supplied with heat treating liquid from theupper tray 12. - If the liquid in the bottles has substantially the same density as the heat treating liquid the smallest deformation of the bottles is obtained if the
level 36 is kept substantially equal to thelevel 26. If the liquid in the bottles has a larger density than the heat treating liquid, thelevel 36 is suitably kept higher than thelevel 26, and if the liquid in the bottles has a smaller density than the heat treating liquid, thelevel 36 is suitably kept lower than thelevel 26 so that the deformation of the bottles shall become as small as possible. - After the heat treatment the bottels are cooled, suitably thereby that water, cooled by the
heat exchanger 30, is circulated through thevessel 10 via thenozzles 32. - Instead of letting the
end 20 of thepipe 21 constitute a spillway, one can let theupper edge 44 of thetray - In the
part 46 of the bottle, which is located above thelevel 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 thevessel 10 is kept equal to the pressure in thepart 46. Air and steam can be let out of thevessel 10 through anothervalve 50, such that the pressure in thevessel 10 does not become larger than the pressure in thepart 46, in which case the bottle would be squeezed.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8401848 | 1984-04-03 | ||
SE8401848A SE451540B (en) | 1984-04-03 | 1984-04-03 | SET AND DEVICE TO HEAT TREATMENT OF A LIQUID MEDIUM CONTAINED IN A CONTAINER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0159302A1 true EP0159302A1 (en) | 1985-10-23 |
EP0159302B1 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 (en) |
JP (1) | JPS60228222A (en) |
AU (1) | AU571953B2 (en) |
CA (1) | CA1250403A (en) |
DE (1) | DE3561647D1 (en) |
SE (1) | SE451540B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4946041A (en) * | 1988-03-11 | 1990-08-07 | Fbi Brands Ltd. | Easy opening gable top carton |
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 |
US5283033A (en) * | 1991-11-29 | 1994-02-01 | Advanced Retort Systems, Inc. | Process for sterilizing the contents of a sealed deformable package |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0487934A (en) * | 1990-07-16 | 1992-03-19 | Hisaka Works Ltd | Method and device for retort pasturing liquid contained in plastic container and heating pasturizing tray used |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1325455A (en) * | 1962-06-18 | 1963-04-26 | Duschek Gmbh Alois | Method and device for the deformation-free sterilization of hermetically sealed plastic containers |
FR2288481A1 (en) * | 1974-10-24 | 1976-05-21 | Hanau Sa F | NEW METHODS AND EQUIPMENT FOR THE HEAT TREATMENT OF PRODUCTS CONTAINED IN WATERTIGHT CONTAINERS |
US4050894A (en) * | 1975-02-25 | 1977-09-27 | Mariano Rodriguez Genis | Sterilizing and sterility maintaining apparatus for dental and surgical tools and the like |
-
1984
- 1984-04-03 SE SE8401848A patent/SE451540B/en not_active IP Right Cessation
-
1985
- 1985-03-28 AU AU40472/85A patent/AU571953B2/en not_active Ceased
- 1985-03-29 EP EP19850850115 patent/EP0159302B1/en not_active Expired
- 1985-03-29 DE DE8585850115T patent/DE3561647D1/en not_active Expired
- 1985-04-02 JP JP6862085A patent/JPS60228222A/en active Pending
- 1985-04-02 CA CA000478169A patent/CA1250403A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1325455A (en) * | 1962-06-18 | 1963-04-26 | Duschek Gmbh Alois | Method and device for the deformation-free sterilization of hermetically sealed plastic containers |
FR2288481A1 (en) * | 1974-10-24 | 1976-05-21 | Hanau Sa F | NEW METHODS AND EQUIPMENT FOR THE HEAT TREATMENT OF PRODUCTS CONTAINED IN WATERTIGHT CONTAINERS |
US4050894A (en) * | 1975-02-25 | 1977-09-27 | Mariano Rodriguez Genis | Sterilizing and sterility maintaining apparatus for dental and surgical tools and the like |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4946041A (en) * | 1988-03-11 | 1990-08-07 | Fbi Brands Ltd. | Easy opening gable top carton |
US5421512A (en) * | 1988-03-11 | 1995-06-06 | Fbi Brands Ltd. | System for packaging perishable liquids in gable top cartons |
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 |
US5283033A (en) * | 1991-11-29 | 1994-02-01 | Advanced Retort Systems, Inc. | Process for sterilizing the contents of a sealed deformable package |
Also Published As
Publication number | Publication date |
---|---|
CA1250403A (en) | 1989-02-28 |
JPS60228222A (en) | 1985-11-13 |
EP0159302B1 (en) | 1988-02-24 |
SE8401848D0 (en) | 1984-04-03 |
SE8401848L (en) | 1985-10-04 |
AU4047285A (en) | 1985-10-10 |
SE451540B (en) | 1987-10-19 |
DE3561647D1 (en) | 1988-03-31 |
AU571953B2 (en) | 1988-04-28 |
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