For some web materials Bow Rubber expander Roll, Slat Expander Rolls or scroll rolls, Bow Rolls not work for removing wrinkles, where Polyband Expanders are used. This Roll comes in diameter 140mm and working if the web width is more than 1000mm. If web tension is not sufficient to drive the roll extra drive like sprocket or pulley be given as per requirements. Special elastic cord fitted on cam mechanism can be adjustable for more expanding action. It is very important to install the Roll in proper warp angle to get maximum results. Maximum working width 2500mm in normal cases.