Abstract: A blade of the crosscut shredder has the feature that any of a plurality of blades on rotary shafts rotating in opposite directions has a plurality of primary shoots. A plurality of auxiliary shoots are provided in the vicinity of the primary shoot. The distance between the primary shoot and the blade center is slightly larger than the distance between the auxiliary shoot and the blade center. When the blades rotate in opposite directions with the rotary shafts, the auxiliary shoots of any blade on either rotary shaft pushes the paper to be shredded toward the primary shoots on the opposite blade. The primary shoots thus pierce the paper at a lower power.

Abstract: A paper clearing device for a shredder includes a frame, a motor, a gear set, a first rotary shaft, and a second rotary shaft. The first rotary shaft and the second rotary shaft are mounted with several cutting blades and paper guides. The paper guides on at least one rotary shaft are half paper guides. When paper jams in the shredder, the user only needs to issue a paper back command, which causes the rotary shafts to rotate in a reverse direction, causing paper to back away from the cutting region between the cutting blades and instead pass over the respective shaft with the half paper guides, optionally with the assistance of a paper clearing driver, and through an opening at the back, non-cutting side of the respective shaft to fall into a trash bin from which the jammed paper can be readily removed.