Electrophotographic recording apparatus including a pivotably mounted and elastically supported transfer unit and auxiliary roller

Claim 1

An electrophotographic recording apparatus which has upper and lower casings arranged so that the upper casing is liftable from the lower casing, comprising: a photoreceptor drum supported by means of the upper casing; means for forming a toner image on the surface of the photoreceptor drum; means for guiding a recording sheet to the photoreceptor drum; a transfer unit for electrical discharge located under the photoreceptor drum and adapted to transfer the toner image to the recording sheet; an auxiliary roller for feeding the recording sheet, said auxiliary roller being rotatably mounted on the transfer unit so as to be situated in a position fixed with respect to the transfer unit and on the upstream side with respect to the flowing direction of the recording sheet; an arm extending from the transfer unit and having a pivot supported by the lower casing; a disk-shaped space defining member coaxial with the photoreceptor drum and/or the auxiliary roller; and an elastic supporting member for urging the transfer unit and the auxiliary roller against the photoreceptor drum so that the respective outer peripheral surfaces of the drum and the roller face each other across the space defining member when the upper casing is shut down.