Protected filter units for safety filtration and method for production thereof
AssigneeSartorius Stedim Biotech GmbH
InventorRainer Bautz
Life of this patent
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Abstract
The invention relates to protected filter units for safety filtration, in which the filter units are at least double-packed with different packaging materials and to a method for producing the protected filter units. In this case, the first packaging material is permeable to gases but impermeable to microorganisms and the at least second packaging material is impermeable to gases. The first packaging material fixes the at least one filter unit, and so no abrasion can take place during transport and handling. The filter units according to the invention are suitable for sterile filtration processes and for filtration processes under clean-room conditions.
Claims8
Protected filter units for safety filtrations comprising at least one filter unit and at least two flexible packaging materials, of which the first packaging material is gas permeable but impermeable for microorganisms and encloses the at least one filter unit and the at least second packaging material is impermeable to gases and encloses at least a first packaging material with the at least one filter unit, wherein gas is removed from the protected filter units and the first packaging material fixes the at least one filter unit in normal conditions.
A method for producing protected filter units for safety filtrations comprising the following steps:
- A enclosing at least one filter unit in a first flexible packaging material which is gas permeable but impermeable for microorganisms,
- B enveloping at least one unit obtained after step A by at least one second packaging material which is flexible but impermeable to gases except for at least one opening in the envelope,
- C removing gas from the envelope, the first packaging material fixing the at least one filter unit, and
- D closing the at least one opening of the at least second packaging material in a gas-tight fashion.
Dependencies are inferred from the claim text.