Abstract: A dust filter for filtering dust out of an air stream has a filter membrane pleated into a row of pleats. A pleat deflector is movably suspended for moving along the row of pleats for cleaning the filter membrane. The deflector has a free end extending between the pleats when the deflector and the pleats are in undeflected condition, such that when the deflector is moved along the row of pleats, the pleats are deflected and released in succession along the row. The deflector includes a flexible plate of which at least a portion between the suspension and the free end has a width transverse to the direction of movement of the deflector, where the width decreases with the distance to the suspension.

Abstract: A dust filter for filtering dust out of an air stream has a filter membrane (2) pleated into a row of pleats. A pleat deflector (3A, 3B) is movably suspended for movability along the row of pleats, for cleaning the filter membrane (2). The deflector (3A, 3B) has a free end (9A, 9B) extending between the pleats when the deflector (3A, 3B) and the pleats are in undeflected condition, such that when the deflector (3A, 3H) is moved along the row of pleats, the pleats are deflected and released in succession along the row. The deflector (3A, 3H) is or comprises a flexible plate (10A, 10B) of which at least a portion between the suspension (4) and the free end (9A, 9B) has a width transverse to the direction of movability of the deflector (3A, 3B), which decreases with the distance to the suspension (4). Thereby, a deflector of increased stiffness is obtained which is advantageous for effective dust removal.