A clipping machine for producing sausage-shaped products having a non-circular cross-section, by feeding a filling material into a tubular packing casing in a feeding direction, the clipping machine comprises: - a filling tube having an axis longitudinally extending parallel to the feeding direction of the filling material as well as between a first and a second end of the filling tube, the first end being coupled to a feeding device for feeding the filling material in the feeding direction along the filling tube, - a clipping device positioned downstream the second end of the filling tube and including a first and a second displacer unit each having an upper and a lower displacer element (22a, 22b) for displacing the filling material in the tubular packing casing for forming a plait-like portion on the tubular packing casing, and a clipping unit for placing at least one closing clip to the plait-like portion for closing the just filled tubular packing casing, and - a forming station for forming the cross-section of the casing portion while being filled, positioned downstream the clipping device, characterized in that a telescopic tube is arranged on and coaxially aligned to the filling tube, wherein the telescopic tube is adapted to be reversibly movable on the filling tube in and contrary to the feeding direction, and wherein a telescopic tube drive is coupled to the second end of the telescopic tube for reversibly moving the telescopic tube between a first and a second position on the filling tube, wherein, in the first position, the second end of the telescopic tube is aligned to the second end of the filling tube, and wherein, in the second position, the second end being positioned in closed vicinity to the forming station. - a filling tube having an axis longitudinally extending parallel to the feeding direction of the filling material as well as between a first and a second end of the filling tube, the first end being coupled to a feeding device for feeding the filling material in the feeding direction along the filling tube, - a clipping device positioned downstream the second end of the filling tube and including a first and a second displacer unit each having an upper and a lower displacer element (22a, 22b) for displacing the filling material in the tubular packing casing for forming a plait-like portion on the tubular packing casing, and a clipping unit for placing at least one closing clip to the plait-like portion for closing the just filled tubular packing casing, and - a forming station for forming the cross-section of the casing portion while being filled, positioned downstream the clipping device, characterized in that a telescopic tube is arranged on and coaxially aligned to the filling tube, wherein the telescopic tube is adapted to be reversibly movable on the filling tube in and contrary to the feeding direction, and wherein a telescopic tube drive is coupled to the second end of the telescopic tube for reversibly moving the telescopic tube between a first and a second position on the filling tube, wherein, in the first position, the second end of the telescopic tube is aligned to the second end of the filling tube, and wherein, in the second position, the second end being positioned in closed vicinity to the forming station.