The invention concerns a tea leaves sieving apparatus (1) comprising :- a sieving member (2) for treating tea leaves conveyed according to one direction (D) on the sieving member said sieving member comprising two perforated plates (21, 22) positioned one on the other and so that :- each hole (22a) of the upper perforated plate (22) is positioned above a hole (21a) of the lower perforated plate (21),- the lower perforated plate (21) is out of line with the upper perforated plate (22) so that the superposing of said two perforated plates creates for each superposed holes (21 a, 22a) a step (23), said step ascending according to the conveying direction (D).
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