| 摘要 |
Roll changer for feeding a material web wound on a material roll (2, 3, 4) into a web-processing machine having a support frame (1), in which at least one material roll (2, 3, 4) is mounted so it is rotatable around its rotational axis, at least three material rolls (2, 3, 4) being provided, whose rotational axes (R) are each oriented parallel to one another, and which are situated so they are pivotable around a shared pivot axis (D) parallel to their rotational axes (R). Preferably, a pair of support arms (6) is provided in each case for the rotatable mounting of the material rolls (2, 3, 4) around their particular rotational axis (R), between which the particular material roll (2, 3, 4) is mounted so it is rotatable, and which each project radially from the pivot axis (D) parallel to the particular rotational axis (R). According to the present invention, a roll drive (23) is provided in the unwinding area, which sets the material roll (2) located in the unwinding area into rotation, or brakes it.
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