sensor 30 such as a following roller attached to a lever arm which actuates a cam switch when the lever arm reaches a predetermined position indicating that a short length of paper remains upon the roller as the paper 28 is spooled from the roller 26 it passes over a first guide roller 32 and wraps about a paper roller 34 the paper roller 34 has a larger diameter than the guide rollers to enable the paper 28 to be electrostatically charged by a charger 36 such as a corona electrostatic charger which imparts an electrical charge generally in the dark to a photoconductive material such as a zinc oxide coating upon the paper 28 as the paper 28 departs the corona charger 36 it is struck by electromagnetic energy illustrated by a beam 38 the electromagnetic energy may be infrared visual radiation or ultraviolet radiation in the preferred embodiment the radiation comes from the coherent light beam of a laser after the paper has been charged by the corona charger 36 and discharged by the light beam 38 it is exposed to a toner assembly 40 where toner is applied over a fixed path length u03b8 of the paper 28 as will be described in fig2 below the toner which has adhered to the remaining charged surfaces of the paper 28 next passes through a fuser 42 which heats the paper and toner to fuse the toner permanently to the paper in the preferred embodiment the toner is formed as powdered dry ink which when exposed to heat adheres to the paper the paper 28 is then pulled from the fuser 42 by pinch rollers 44 and driven past a.