Abstract: A bundle limbing device, primarily for mobile use, is divided into two mirror-symmetrical halves, each with one front and one rear swinging arm (4a,4b) at their lower parts mounted on a low level of a forwarder and interconnected by means of longitudinal bars (14a,14b). At the ends of the swinging arms of each device half, front and rear bearing beams (6a,6b) are rigidly secured, which serve as bearings for a series of parallel limbing rolls (8). Support shoulders (13a,13b) at the top of the swinging arms form side supports for a bundle of trunk portions (12) which are deposited on the bed formed as the two device halves are brought together, when the opposite bearing beams (6a,6b) on the associated swinging arms meet and form an obtuse angle. Each limbing roll consists of a center tube (9) which supports a series of circular annular flanges (10) with alternating inclination to the tube shaft defining an elliptic rotational surface.

Abstract: Cutting horizontal, cantilevering objects of splittable material, such as de-barked tree trunks and the like is carried out with the aid of a guided, endless circulating saw chain (10), the upper cutting part of which is moved from below and upwards through the object. The lower edge portions of the cut surfaces at the cut are allowed to bear against each other under the action of the bending moment of the cantilevering object, while the return portion of the saw chain in the cutting area is kept free from the cut surfaces. The saw chain is guided by a chain guide (12) extending curvilinearly under the object and guides the return part of the chain. The chain guide and the guided return part are both outside and below the object during the whole of the cutting operation, while the upper cutting portion of the chain runs straight between the end points of the curved portion of the chain guide.