Electrophotographic apparatus having a development unit shifter
AssigneeSamsung Electronics Co., Ltd.
InventorByeong-Hwa Ahn
Life of this patent
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Abstract
An electrophotographic apparatus made up of a toner image transfer roller and a developing unit. The developing unit is provided with a developing unit shifter to shift the developing unit upwards or downwards so as to make the photoconductive drum contact or separated from the toner image transfer roller according to whether a sheet of paper is supplied between them or not. The shifter is made up of a pair of rotating cams that cause the developing unit containing the photoconductive drum to make contact with the transfer roller.
Claims10
An electrophotographic apparatus, comprising:
- a toner image transfer roller;
- a developing unit, said developing unit being comprised of a photoconductive drum for rotation at a given speed, a charging roller for charging a surface of said photoconductive drum to form a uniform electric charge layer and a developing roller for developing a latent image formed on the surface of said photoconductive drum with a toner;
- and
- a developing unit shifter for shifting said developing unit upwards and downwards so as to make said photoconductive drum contact with and separate from said toner image transfer roller depending on whether a sheet of paper is supplied between said photoconductive drum and said toner image transfer roller.
An electrophotographic development apparatus, comprising:
- a developing means having a photosensitive drum, said developing means having a first side and a second side opposite said first side;
- a transfer roller disposed on said first side of said developing means;
- a camming means, located on said second side of said developing means, for shifting said developing means and said photosensitive drum towards and away from said transfer roller.
Dependencies are inferred from the claim text.