Method for stopping feed of developer in electrophotographic copying machine

Abstract

Abstract PURPOSE:To prevent the surface of a photosensitive body from being contacted with developer after the end of development by reversing a developing roll after stopping a developing machine, and after opposing the developer unadhering part of the developing roll to the photosensitive body, stopping the developing roll. CONSTITUTION:When development starts, the developer 6 mixed by a blender 5 is carried to the developing roll 3 by a transport roll 4 and magnetized on the periphery of the roll 3 to form a magnetic brush and the magnetic brush is slided on the surface of the photosensitive body 2 to develop an electrostatic image on the photosensitive body 2. After the development of the electrostatic image, the residual developer 6 at the part B of the developing roll 3 provided with internal magnets adjoining the same magnetic poles each other is dropped by the magnetic force. Therefore, no developer is adhered to the part between a part A starting to magnetize the developer 6 and the part B dropping the developer. After the end of the development, the developing roll 3 is reversed until the developer unadhered part is opposed to the photosensitive body 2 and then the developing roll 3 is stopped.

Inventors

• 👤 Isao Katsuta
• 👤 勝田　勇生
• 👤 Kaneyoshi Miura
• 👤 三浦　兼能

Bibliographic Details