| 摘要 |
<p>The invention relates to a system for providing a constant tension of the paper belt being fed from a paper coil. According to the invention, a floating roller is mounted between two displaceable trolleys, the ends of the roller shaft being slidably mounted in respective grooves of said trolleys. The trolleys are linked to chains which are provided with a common shaft which drives a piston rod of a cylinder. Two cylinders whose joint power is slightly smaller than that of the cylinder of the common shaft of the trolley chains are mounted to balance the pulling effect of the paper belt on the roller. Means for adjusting the brake pressure adjuster of the paper coils is provided on one of the trolleys. In accordance with the invention, an equilibrium of the oscillation of the floating roller is obtained so as to permit slight oscillations without affecting the pressure adjustment of the coil brakes.</p> |
