| 摘要 |
Device wherein the support arm (3) elastically hinged on the base plate (1) with wall fixing for the unit in order to constantly apply the roll of material (R) against the drive drum (5) with a non-slip surface, is fitted with a device comprising a first element (6) fixed onto the arm, and a second element (7) fixed so as to swing on the base plate with return elastically in the direction of the first element; these elements being judiciously positioned and profiled in their contact zone in order to provide dispensing with substantially constant pressure of the roll of material on the drive drum throughout the unrolling operation.
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