Method and device for shredding sheet-shaped material

A “V” device for shredding sheets, preferably sheets of paper, which are present in a stack, as a result of cutting up, said device including

• a support for the stack,
• a cutting system, consisting of two counter rotating cutting rollers,
• a sheet-grasping and sheet-conveying device, realized for grasping the sheets individually from the stack and for conveying the singled-out sheets toward the cutting system,
• wherein the sheet-grasping and sheet-conveying device comprises two counter rotating conveying rollers, the circumferential faces of which are in entraining contact in a positive locking or frictional locking manner with the next one of the sheets of the stack through a through-opening which is present in the support, and
• wherein the releasing of the next one of the sheets from the stack and the passage thereof through the through-opening is provided whilst forming a sheet loop which extends toward the cutting system,
• characterized in that
• as a result of a certain predefined spacing between the two conveying rollers merely elastic, reversible deforming of the sheets is provided during the forming of the loop, and
• on account of a predefined asymmetrical position of the through-opening relative to the ends of the sheets in the stack the entraining contact between a first conveying roller and the sheet is terminated, whilst the second conveying roller is still in entraining contact with the same sheet such that one end of the sheet is free and the elastic deformation is reversed before the sheet loop reaches the cutting system, and
• the cutting system is positioned relative to the conveying direction of the free sheet end such that said free sheet end passes between the cutting rollers, wherein the sheet is grasped at the free end by the cutting system, pulled into the cutting system by means of the cutting rollers and is cut up over its entire length.