Patent ID: 7251438
Filing Date: 2007-07-31
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a movable body to be charged; a charger comprising a charging member contacting or adjoining said body to be charged and configured to apply a voltage, including an AC component, to said charging member for thereby charging said body; and a coating device configured to apply a protection substance for protecting a surface of said body from deterioration ascribable to charging on said body; wherein a ratio (%) of a number of particular elements, contained in the protection substance and detected by an X-ray photon spectral analyzer (XPS) in a zone where said charging member charges said body, to a total number of all elements constituting an outermost surface of said body and detected by said XPS is expressed as: where Vpp denotes a peak-to-peak voltage (V) of an AC voltage,f denotes a frequency (Hz) of the AC component applied to said charging member, v denotes a moving speed (mm/sec) of the surface of said body, N where d denotes a film thickness (μm) of said body, ∈