Abstract: A pivot-steered tandem roller for ground compaction, comprising a machine frame with an operator platform, two compaction drums which are spaced apart from one another in the longitudinal direction of the machine and are each steerably mounted on the machine frame via a pivot steering system, a drive motor, a cooler, and a fan associated with the cooler and conveying a cooling air flow, the cooler being arranged vertically above and/or in the longitudinal direction of the machine at the level of one of the compaction drums. Moreover, the invention relates to a method for operating such a pivot-steered tandem roller.

Abstract: A pivot-steered tandem roller for ground compaction, comprising a machine frame with an operator platform, two compaction drums which are spaced apart from one another in the longitudinal direction of the machine and are each steerably mounted on the machine frame via a pivot steering system, a drive motor, a cooler, and a fan associated with the cooler and conveying a cooling air flow, the cooler being arranged vertically above and/or in the longitudinal direction of the machine at the level of one of the compaction drums. Moreover, the invention relates to a method for operating such a pivot-steered tandem roller.

Abstract: The steel punch knife according to the invention is suitable for punching out parts of any shape from paper, cardboard, paperboard, corrugated board, plastics sheets, leather rubber and the like, and comprises a knife body (4) with a cutting edge (2) at one end and a deformable back portion (3) opposite the cutting edge (2). The cutting edge (2) is harder than at least a portion of the back portion (3). The back portion (3) comprises a V-shaped back edge (3b) having two inclined sides defining an inclination angle between them. The maximum width of the back edge (3b), at the base thereof, is smaller than the width of the knife body (4), such that there is a shoulder (9) where the back edge (3b) meets the knife body (4).