Analysis of Paper Transportation Characteristics of a Long Rubber-layerd Roller and a Steel Roller

This paper describes theoretical and experimental studies of the paper transportation characteristics of a long rubber-layered roller and a long steel roller. In a paper transport mechanism with long rollers, normal force distribution in the longitudinal direction arises due to the bending deformation of the roller core and the inequality of the clamping loads applied at both ends of the rollers. First, this normal force distribution was numerically analyzed by finite element method using calculated results of rubber deformation. Next, the friction drive characteristics between rubber and steel rollers was numerically analyzed. The velocity ratio between rubber and steel rollers was measured for various clamping loads experimentally. It was shown that the proposed analytical method can predict the velocity ratio between rubber and steel rollers precisely. Finally, the paper skewing due to the inequality of the clamping loads was numericaly analyzed. The paper skew angle was measured for various clamping loads experimentally. It was shown that the proposed analytical method can predict the paper skew angle precisely.