Metering roller and device comprising at least one such metering roller

A metering roller (1) for filling a target container (2) with a partial quantity (4) of powdered product (3) to be metered has a roller body (5) with a roller outer surface (6) and an inner chamber (7) in which a compressed air supply device (8) is located, and also has a metering chamber (9) for metered receiving and dispensing of the powdered product (3), each metering chamber (9) forms a connection between the roller outer surface (6) and the inner chamber (7), and wherein the compressed air supply (8) is designed to generate a negative or positive pressure in the metering chamber (9) in order to feed the powdered product (3) into the metering chamber (9) or to dispense the powdered product from the metering chamber (9), the metering chamber (9) is delimited from the inner chamber (7) and the compressed air supply (8) by a filter element (10) which is permeable to compressed air and is supported between a clamping element (11) and a flat contact surface (12) of the roller body (5) surrounding the metering