Electrostatic imaging device capable of producing high-quality image despite variations in ambient conditions

摘要

An electrostatic imaging device such as a printer or facsimile machine has a power source for a transcription roller for transcribing a toner image from a photoreceptor drum to a recording sheet. The power source applies to the transcription roller during an initialization period a power source having a first characteristic between a transcription voltage (V) and a transcription current (I) defined by I/a+ V/b=1. The transcription voltage and the transcription current are measured, based on which the power source selects one of a plurality of characteristics of a power source to be applied to the transcription roller during an operation period.