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    • 21. 发明授权
    • Apparatus for controlling the tension of webs
    • 控制WEBS张力的装置
    • US3712555A
    • 1973-01-23
    • US3712555D
    • 1971-02-08
    • BRIEN R O
    • O BRIEN R
    • B65H75/08B65H75/24B65H81/08H01B13/08
    • B65H75/08B65H75/245B65H81/08H01B13/0866Y10T279/1074
    • A mandrel for regulating the tension on a web being unrolled from a storage roll placed on the mandrel by changing the friction force between the storage roll which rotates relative to the mandrel. The mandrel is radially expandable and comprises a split cylindrical sleeve housing a radially expandable spring. The spring is expanded by means of a rotatable stud adjacent one end of the spring, a stud fixed to the sleeve on the other end of the spring and a screw fixed to the rotatable stud and mating with a spiral bore in the fixed stud. During use, one side of the sleeve adjacent the opening is fixed while the other side of the sleeve adjacent the opening is free.
    • 用于通过改变相对于心轴旋转的存储辊之间的摩擦力来调节卷筒纸上的张力的心轴,其从放置在心轴上的存储辊展开。 心轴是径向可膨胀的,并且包括容纳径向可膨胀弹簧的开口圆柱形套筒。 弹簧通过邻近弹簧的一端的可旋转的螺柱膨胀,固定到弹簧的另一端的套筒上的螺柱和固定到可旋转的螺柱并与固定螺柱中的螺旋孔配合的螺钉。 在使用期间,邻近开口的套筒的一侧是固定的,而套筒的与开口相邻的另一侧是自由的。