A scratch resistant coated article is provided which is also resistant to attacks by at least some fluoride-based etchant for at least a period of time. A control unit conveys a sheet between a transfer unit and paper stop rollers, while forming a loop of the sheet therebetween, by setting the speed of conveying the sheet passing between the paper stop rollers to be higher than the speed of conveying the sheet passing through the transfer unit. The disclosed devices and methods may be applied to handover determinations in heterogeneous networks that implement a soft cell configuration.