A method and apparatus for creasing planar material includes a pair of confronting drums between which the material is passed with at least one of the drums having at least one electrical filament thereon adapted to engage the planar material as it is passed between the drums for melting the planar material to a predetermined depth. A transfer source address generator includes a transfer source address register that stores a present value of the transfer source address, and a transfer source reload register that stores an initial value of the transfer source address. The oscillator counting the total oscillation count corresponding to said delay time.