Reducing Cylinder Vibrations Using Skewed Angle Gaps

The cylinder gaps in web offset presses cause a discontinuity in the pressure relationships between the cylinders. This disturbance can set up vibrations that may show up in the print as streaks. This paper describes a method of reducing the disturbance and thereby improving print quality by making the cylinder gaps skewed at an angle to the cylinder axis. The method of testing and the results obtained with such skewed gap cylinders are presented.