| abstract |
The present invention relates to a closed cartridge (10), intended to be extracted under pressure, comprising a cup (12) with a bottom (13) with central part and peripheral part and a side wall having substantially the shape of a truncated cone and a circular rim of diameter greater than the bottom and a welded cover (15) on the periphery of the rim of the cup and the cover is intended to be torn under the sole effect of the thrust of the extraction fluid at the start of the extraction, said cartridge comprising in the cup at the bottom a means (16) guaranteeing the retention of solid substance when it is open, in which the means guaranteeing the retention of solid substance is a sheet of fabric sealed in the bottom of the cup on two zones, on the one hand in the central part (17) and on the other hand in the peripheral part (18) of said bottom (13). |