Abstract: In an electrophotographic apparatus using a charging apparatus for contact charging, the charging apparatus includes a flexible and hollow electrically conducting roller, and an electrically conducting brush roller which is provided in the hollow roller in concentric therewith and to rotate relative thereto, wherein a charging voltage is applied to the hollow roller via the brush roller, and the photosensitive material is electrically charged by rotating the hollow roller by bringing it into physical contact with the photosensitive material, and the hollow roller is brought at its both end portions into press-contact with the end portions on the surface of the photosensitive material and is rotated by being driven by the photosensitive material.

Abstract: A roll paper cutting device is attachable to the main body of an image forming apparatus main body. The roll paper cutting device includes a cutter for cutting the paper of a roll of paper contained therein, as well as an arrangement for feeding the cut sheet to the image forming apparatus. The roll paper cutting device has at least one transport roller for transporting the roll paper, as well as a drive system for driving the transport roller, and a drive change device such as a clutch for selectively bringing the transport roller into idle rotation or into a driven state. A detector detects the travel of the roll paper. A control device such as a CPU controls the rotation of the transport rollers with predetermined timing based on the time when the travel of the roll paper is detected with all the transport rollers in idle rotation in a standby state for paper feeding.

Abstract: An image forming apparatus has an image forming apparatus main body with a sheet inlet. The main body is arranged to form an image on a sheet inserted into the sheet inlet. A roll paper cutting device contains roll paper and includes a cutting arrangement for cutting the roll paper and discharging cut sheets. The cutting device is attachable to the main body of the apparatus, and is selectively positionable to a feed position where its outlet is in register with the sheet inlet, or a standby position wherein the outlet thereof is out of register with the sheet inlet. A guide arrangement is provided on the main body for guiding the cutting device for movement in the vertical direction between the feed position and the standby position.