A Study on Paper Feed Velocity in a Transfer System with Elastic Intermediate Transfer Belt

Abstract

Digital on-demand printing machines have been widely used in the commercial printing field. However, magnification errors of an image in the slow scanning direction at a secondary transfer with an elastic belt for intermediate transfer, which likely occur in various kinds of paper printing and environment, are unacceptable problems.

In this study, the mechanism of magnification errors is investigated by FEM (Finite Element Method) analysis. At first, friction characteristics of a secondary transfer nip are investigated experimentally. And then, motion and deformation of a paper, belts, and rollers with the friction characteristics are analyzed by FEM. Finally, calculated paper velocity is validated by comparison with experiments.