| 摘要 |
The invention relates to an image formation apparatus, a development device and a process cartridge (1). The cartridge (1) comprises a developer carrier (107) for use with a nonmagnetic one-component developer and which for location rotatably in the vicinity of or in contact with a latent image carrier (200). A developer supply member (106) for location rotatably for supplying powdered developer onto the developer carrier (107). Further, a layer thickness regulating member (110, 310, 410, 510, 710) is provided for reducing a layer thickness of the developer on the developer carrier that is abutted against the developer carrier (107), wherein the layer thickness regulating member (110, 310, 410, 510, 710) makes sliding contact on its surface with the developer carrier (107) and is arranged to develop an electrostatic latent image on the latent image carrier (200) by a predetermined voltage applied to the developer carrier (107). The layer thickness regulating member (110, 310, 410, 510, 710) has a roughness on a sliding contact section thereof which makes sliding contact with the developer carrier (107), and is configured so that the roughness of a part of the layer thickness regulating member (110, 310, 410, 510, 710) which protrudes upstream in a developer transportation direction is greater than the roughness of the slide contact section. |
