| abstract |
A filter holding device (1; 41; 75; 81) is arranged to arrange at least one filter (7; 43a, 43b; 85) inside the flexible bag (3; 71), said filter holding device comprising attachment means ( 19a-d, 21a-d; 79; 83), for attaching the filter holding device to the inner surface of the flexible bag, so that at least one filter held by the filter holding device is arranged at a distance from the inner surface of the flexible bag a certain distance. |