| 摘要 |
An apparatus for controlling the tension and acceleration of a strip being unwound from a spirally wound roll includes means for rotatably mounting the roll about its center, a stop member disposed against a peripherial portion of the circumference of the roll for establishing tension in the strip being unwound, means for allowing the center of the roll to approach the stop member as the diameter of the roll decreases, and brake means for applying braking force to each side of the roll for maintaining the tension of the strip at a constant level. |
