Patent ID: 6175710
Filing Date: 2001-01-16
Classification: G03G

Abstract:
An electrophotographic recording apparatus, comprising:a photosensitive body;a conductive contacting type charger for producing an electrically-charged area on said photosensitive body;an optical writer for forming an electrostatic latent image on the electrically-charged area of said body;a developer for electrostatically developing the electrostatic latent image of said body in an environment of 20-80% (g/kg) relative humidity as a charged visible image with an electrostatically-charged one-component developer; anda transfer member for electrostatically transferring the charged visible image developed by said developer from said body to a recording medium in an environment of 20-80% (g/kg) relative humidity,wherein the optical density of the transferred image is greater than 1.2,wherein the developer transfer efficiency is greater than about 80%,wherein said developer includes a conductive developing roller member for entraining the developer to form a developer layer therearound and for bringing the developer layer to said body for the development of the latent image, a conductive regulating blade member resiliently engaged with said developing roller for uniformly regulating a thickness of the developer layer formed therearound, and a charge injection effect member for electrically charging the developer layer by applying a developer bias voltage to said conductive developing roller member and electric energy to said regulating blade member, andwherein said transfer member includes a conductive transfer roller member in contact with said body, and an electric source for applying an electric energy to said conductive transfer roller member to give the recording medium an electric charge having a polarity opposite to that of the charged visible image, during a passage of the recording medium through a nip between said body and said conductive transfer roller member.