Package making – With contents treating – Vacuum or inert atmosphere
Patent
1994-08-24
1995-09-26
Sipos, John
Package making
With contents treating
Vacuum or inert atmosphere
53141, 53174, 53176, 53281, 53432, B65B 3102
Patent
active
054525659
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a method and a device for manufacturing a thermally insulated container for storing and transportating material such as vaccine, biological material or the like requiring a substantial constant temperature during a time of several months, a device for comprising a first can-shaped vessel filled with a solid-to-liquid phase transforming refrigerant material in which the material to be cooled is placed in a multi-layer insulation comprising layers of porous material of low thermal conductivity under vacuum alternating with layers of radiation shields about said first vessel, so that it encloses said first vessel on all sides, and a second can shaped vessel, in which said insulated first vessel is arranged.
When storing and/or transporting biological and chemical materials one has to consider that these materials will change with time, if they are not stored at a certain, often low, temperature. This is mainly a problem in the developing countries, where the transport of heat sensitive material such as vaccines, serum, blood, blood plasma and some enzyme compounds is carried out in an environment, of rather high temperatures. In addition the transport routes are often long and in bad condition, which means that the transport will last long. In the developing countries it is also unusual that vaccines and the like are manufactured in the country, but the demand is almost always covered by import from different industrialized countries. This means that the transport routes will become still longer.
More than 90% of all vaccines require storing at temperatures between +2.degree. and +8.degree. C. and are destroyed or degraded rather fast at higher temperatures and also by freezing. As vaccines and the like are very sensitive and as the transport routes are long and hard, a high degree of all vaccines are degraded along the transport route before they reach the final user in the developing country. Today the vaccines are transported between different stations, of which at least the bigger ones are equipped with cooling and freezing plants. These cooling and freezing plants are powered with electric power or alternatively by means of liquid petroleum, gas or kerosene and they are rather sensitive to disturbance. Due to uncertain electric power supply networks in the developing countries it is for example not unusual with long power failures.
With the cooling plants which exist today it is therefore important that the transport is carried out as fast as possible. This means that vaccines are flown as far as possible into the developing countries and a net of intermediate storing stations is built up. This of course is expensive and requires a well organized chain of cooling plants.
In EP-A-0157751 there is disclosed a container of the above mentioned kind, which is capable of keeping the material held therein at a substantially constant temperature or within a certain temperature interval during a time of six months if necessary.
Purpose and Most Important Features of the Invention
The purpose of the present invention is to provide a device for manufacturing a thermally insulated container of the above mentioned type. This is achieved according to the invention by a device comprising a vacuum chamber in which there is arranged a wrapper machine for wrapping said insulation material about said inner vessel, further comprising a vacuum furnace to treat said insulation material before wrapping said inner vessel, means for placing the insulated inner vessel in the outer and a welding station for hermetically sealing said outer vessel through welding.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a cross-section through a container consisting of inner and outer containers with insulating material therebetween.
FIG. 2 shows a frontal view partly sectioned of a device according to the invention for wrapping insulating material about the inner container.
FIG. 3 is a view from the top of the device according to FIG. 2.
FIG. 4 shows schematically a general view of the device for manufac
REFERENCES:
patent: 3423817 (1969-01-01), Bobo
patent: 3926306 (1975-12-01), Van Nederveen
patent: 4581804 (1986-04-01), McLaughlin
patent: 4862674 (1989-09-01), Lejondahl et al.
Blom Anders
Gustavsson Jarl
Hochberg D. Peter
Jaffe Michael
Kusner Mark
Sipos John
Thermopac AB
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