To precisely position both surfaces (registration in a form conveying direction (lead direction)) when both-surface image formation is carried out.
This apparatus has photoreceptor drums 5 to 8 which carry toner images, an intermediate transfer belt 13 which temporarily carry the toner images carried by the photoreceptor drums 5 to 8, a secondary transfer roll 14 which transfers the toner images carried by the intermediate transfer belt 13 to a form at a transfer part, a register roll 27 which rotates in timing to feeding of a form to the transfer part, a fixing unit 16 which fixes toner images transferred to a 1st surface of the form by the intermediate transfer belt 13 on the 1st surface of the form, an inversion conveyance path such as a both-surface inversion part 28 which turns over the form having the toner images fixed by the fixing unit 16 and conveys it to the transfer part again, a 1st surface read sensor 31 which detects an image on the 1st surface of the form conveyed through the inversion conveyance path, and an image detection sensor 32 which detects the toner image carried by the intermediate transfer belt 13.
| JP2008007277 | PAPER CONVEYING DEVICE, IMAGE FORMING DEVICE, AND DOCUMENT READER |
| JP2007055811 | IMAGE FORMING DEVICE |
YAMAMOTO KEIJI
TORIMARU SATORU
KAWABATA TAKASHI
TAKAHASHI MASAAKI
MIYAMOTO YOKO
KANAYAMA KIYOTOSHI
KIKUCHIHARA KATSUNORI
Takeshi Senda
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