Patent ID: 6055401
Filing Date: 2000-04-25
Classification: G03G

Abstract:
A developing apparatus of an electrophotographic apparatus comprising:a housing for accommodating a developer;a plurality of developing rollers including a first, second and third developing roller rotatably disposed in said housing and arranged opposite to an electrostatic latent image carrying body for conveying a developer carried on respective surfaces of the developing rollers;a conveyor roller rotatably disposed in said housing for conveying said developer carried on a surface thereof to one of said developing rollers;a first screw conveyor disposed in said housing for conveying said developer in an axial direction thereof to supply it to said conveyor roller;a second screw conveyor disposed in said housing for conveying said developer in an axial direction opposite to said axial direction of said first screw conveyor to supply it to said first screw conveyor;each of said first and second conveyors having an axial length larger than an axial length of said developing rollers;a partition wall disposed between said first and second screw conveyors;a toner container for accommodating a toner, said container mounted on said housing;a toner supply means for supplying the toner in said toner container into said housing;an agitating means for agitating the toner supplied by said toner supply means and the developer in said housing;a first doctor blade for regulating an amount of the developer carried on said conveyor roller; anda second doctor blade for regulating an amount of the developer carried on the first developing roller to which the developer is conveyed from said conveyor roller; andscraper means for scraping the developer carried on the second and third developing rollers.