Konica Minolta Business Technologies, Inc.

Takafumi Tanaka

Takashi Watanabe

Teruhiko Toyoizumi

Hitoshi Asano

Hiroaki Takatsu

An image forming device includes a power supply for transfer for applying a voltage for transfer for transferring the toner image on the image carrier onto the recording paper sheet to the transfer member, and a recording paper sheet feed device for feeding the recording paper sheet into the pressing nip, and the method for controlling a power supply for transfer. The power supply for transfer is turned on and the output voltage of the power supply for transfer is set to 0 V before the transfer member is pressed against the image carrier, and the output voltage of the power supply for transfer is switched from 0 V to a high voltage for transfer after the transfer member is pressed against the image carrier.

Image forming device and method for controlling a power supply for transfer

In a paper folding device, a first driving unit for forming a first folding line on the paper moves a first folding plate member to the paper fed to a first feeding position until load on the first folding plate member reaches a prescribed value or higher. A time period from the start of driving of the first folding unit by the first driving unit to the start of driving of a second folding unit by a second driving unit is determined based on characteristic of paper.

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Toyokawa, Japan

Takafumi Tanaka