Charge control for EB coated paperboard

摘要

An apparatus and method for removing an accumulated charge or for applying a predetermined electrical charge to a web of polymer coated paperboard that is printed with electron beam (EB) cured inks. During the EB printing process, the polymer coated surface may accumulate a charge in excess of 500 volts as a result of the EB irradiation. The accumulated charge may be removed by passing the web through a charging zone where a voltage is applied to the web having the same polarity as the charge on the web. A control system for measuring the charge on the web received by the EB irradiation and for adjusting the extent and sign of the voltage applied to the web for placing a predetermined electrical charge condition on the web is included.