Patent ID: 8377296

Claim:
A filter holder to be used in a chromatography column, said chromatography column comprising a medium inlet ( 219 ) for providing particulate medium into the column, said medium inlet ( 219 ) entering an enclosed bed space ( 209 ) of the column through an end unit ( 212 ) of the column and through a first filter ( 204 ), said filter holder comprising: a filter squeezing part ( 356 ) adapted to be provided adjacent to the filter ( 204 ) on the side of the filter ( 204 ) facing the enclosed bed space ( 209 ), said filter squeezing part ( 356 ) facing the filter ( 204 ) essentially in the form of a plate with a central hole for receiving the medium inlet, and a squeezing means ( 354 ) adapted to squeeze the filter squeezing part ( 356 ) against the filter ( 204 ) to prevent any leakage of particulate medium from the bed space ( 209 ) in between the filter holder and the filter ( 204 ), wherein said filter squeezing part ( 356 ) comprises at least one channel ( 338 ), providing fluid connections through the filter squeezing part ( 356 ) from the side of the filter squeezing part ( 356 ) facing the filter ( 204 ) and to the side of the filter squeezing part ( 356 ) facing the bed space ( 209 ).