Developing device with applicator contoured to stir developer applied to a developer support

A developing device for developing a latent image formed on a latent image bearing member with a dry developer, comprising:

• developer support means positioned with a small clearance between it and said latent image bearing member;
• developer supply means for supplying the dry developer to said developer support means;
• and
• applying means for applying the dry developer supplied by said developer supply means onto the surface of said developer support means and for defining the thickness of a layer of the dry developer on said developer support means, said applying means being positioned in the proximity of or in contact with said developer support means and being provided with surface irregularities at least on a surface thereof facing said developer support means for stirring the dry developer and preventing coagulation thereof on said developer support means, said applying means including a screen and a pressing member for pressing said screen against said developer support means.

A developing device for developing a latent image formed on a latent image bearing member with a developer, comprising:

• developer support means positioned with a small clearance between it and said latent image bearing member;
• developer supply means for supplying a developer to said developer support means;
• and
• applying means for applying the developer supplied by said developer supply means onto the surface of said developer support means and for defining the thickness of a layer of the developer on said developer support means, said applying means comprising a screen which is positioned in the proximity of or in contact with said developer support means, said applying means being adapted to supply the developer through said screen for application onto said developer support means.

A developing device for developing a latent image formed on a latent image bearing member with a one-component developer, comprising;

• a developing roller positioned under and with a small clearance between it and said latent image bearing member, said clearance being larger than the thickness of a layer of one-component developer applied on said developing roller;
• means for applying an AC electric field across the clearance between said developing roller and said latent image bearing member;
• a hopper for supplying one-component developer to the surface of said developing roller;
• screen-structured applying means, comprising a screen, for applying the developer onto said developing roller and for defining the thickness of the developer layer on said developing roller said screen-structured applying means being positioned in the proximity of or in contact with said developing roller and being adapted to supply said developer through said screen for application onto said developing roller;
• and
• urging means for pressing said developer contained in said hopper toward said developing roller through said screen.