The present invention relates to a displacer arrangement for gathering a tubular or bag-shaped packing casing filled with filling material, like sausage meat, including at least a first displacer unit (1). Displacer unit (1) comprises a first, outer ring member (10) having a central axis (A) at least approximately vertically arranged to a plane defined by the first ring member (10), a second, inner ring member (20) at least approximately coaxially arranged to the central axis (A) and within first ring member (10), and rotatable held by first ring member (10), and at least three approximately strip-shaped displacer elements (30, 30', 30"). Displacer elements (30, 30', 30") have an effective surface (46) facing the central axis (A), and first and second ends (32, 32', 32"; 34, 34', 34"). First ends (32, 32', 32") of displacer elements (30, 30', 30") are pivotally mounted to first ring member (10) in regular intervals. Second ends (34, 34', 34") of displacer elements (30, 30', 30") are at least approximately radially guidably mounted to the second ring member (20) in regular intervals. Displacer elements (30, 30', 30") are curved in a plane parallel to the plane defined by first ring member (10) to overlap each other while rotating second ring member (20). Displacer elements (30, 30', 30") further comprise a break or crank (36) in the central region of their effective surface (46). Displacer elements (30, 30', 30") are movable between an opened and a closed position, in the open position, displacer elements (30, 30', 30") are moved outwardly, away from central axis (A), and, in the closed position, displacer elements (30, 30', 30") are moved toward the central axis (A) for gathering the tubular or bag-shaped packing casing. Moreover, at least one covering element (50) is provided to the central region of one of displacer elements (30, 30', 30"), thereby at least partially covering a displacer hole defined by displacer elements (30, 30', 30") in their closed position.