| 摘要 |
A multicolor image forming apparatus of the present invention includes a first image forming condition controller for reducing the amount of toner to deposit on a photoconductive element, and therefore the amount of toner to deposit on character images. This reduces the fall of a transfer electric field ascribable to a toner layer. After an upstream image forming devices with respect to the direction of rotation of the photoconductive element has formed a toner image on the element, a second image forming condition controller again charges the toner image before transfer by use of a charger included in a downstream image forming device. This increases the amount of charge to deposit on the toner image without resorting to any extra device. A third image forming condition controller means increases a voltage or a current to be applied to a contact type transfer device, thereby enhancing desirable transfer of the toner image. The first to third controllers are selectively executed to obviate the vermicular omission of images without resorting to any extra device.
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