Patent ID: 7547343

Claim:
Filtration structure ( 11 ) comprising: at least first and second filtering elements ( 15 A, 15 B), each filtering element ( 15 A, 15 B) having an inlet face ( 21 ) and a discharge face ( 23 ), connected to each other by at least three lateral faces ( 24 ), said first and second filtering elements ( 15 A, 15 B) having respectively a first and second lateral face ( 24 A, 24 B) arranged opposite each other; and a seal ( 17 ) connecting said first and second lateral faces ( 24 A, 24 B) and extending between said first and second lateral faces ( 24 A, 24 B); the first lateral face ( 24 A) comprising at least a first region ( 35 A) that does not adhere, or only slightly adheres to said seal ( 17 ), and extends opposite a first region ( 33 B) that strongly adheres to said seal ( 17 ) of the second lateral face ( 24 B), said first region ( 34 A) that does not adhere or only slightly adheres being delimited by at least a portion of an edge ( 37 ) common to the first lateral face ( 24 A) and the discharge face ( 23 ); characterised in that, in an area adjacent to said common edge ( 37 ), the first region ( 35 A) that does not adhere, or only slightly adheres to said seal ( 17 ) comprises at least one side ( 41 A) that diverges towards the discharge face ( 23 ), said side ( 41 A) extending as far as said common edge ( 37 ).