Abstract: A developing apparatus is used for developing a photoconductive drum in a copying machine. The developing apparatus comprises a following developing roller for developing said photoconductive drum, an opposing developing roller for developing a photoconductive drum before the following developing roller, a supply mechanism for supplying developer to the developing rollers, a developer-quantity-regulator plate disposed between the following developing roller and the supply mechanism, and a limiting plate for limiting the length of the magnetic brush formed on the following developing roller. The distance between the photoconductive drum and the opposing developing roller is larger than the distance between the photoconductive drum and the following developing roller. The regulator plate is disposed apart from the developing rollers at a distance longer than the length of their magnetic brushes.

Abstract: A copying apparatus includes a copy paper cutting device which is operated when an original document or an optical device for exposure reaches a predetermined position. The original document or the optical device is stopped when a trailing edge of a copy paper is detected. After at least the leading edge of the copy paper passes through the copy paper cutting device, the copy paper is fed out entirely from an apparatus frame without operating the copy paper cutting device. This results in that the last copy paper sheet of the roll of copy paper is not shorter than the distance between transport rollers in the copy paper passageway to prevent a copy paper jam.