Methods and systems for preventing wrinkles in a web fed through an accumulator

An accumulator system for preventing wrinkles in a web passing therethrough, the accumulator comprising:

• a first arm that is stationary;
• a second arm;
• a first plurality of rollers on the first arm, wherein each roller of the first plurality of rollers is a profiled roller comprising roller shells having a generally concave profiled outer surface;
• a second plurality of rollers on the second arm, wherein each roller of the second plurality of rollers is a flat roller comprising roller shells having a nominally flat outer surface and wherein each flat roller comprises a traction coating for increasing the traction of the web on the roller, wherein the traction coating comprises a plasma coating;
• wherein each profiled roller is disposed between two flat rollers along a web path extending between the first plurality of rollers and the second plurality of rollers;
• and
• wherein the second arm is movable toward and away from the first arm such that the second plurality of rollers is movable toward and away from the first plurality of rollers.