公开(公告)号：EP0911704A4

公开(公告)日：1999-08-11

申请号：EP97919724

申请日：1997-04-25

申请人： KANEKA CORP

发明人： MIMURA KAZUYOSHI ,  TAWADA YOSHIHISA ,  KOBAYASHI KENJI ,  OGOSHI HIROSHI ,  FUKUDA SUSUMU

IPC分类号： G03G15/08

CPC分类号： G03G15/0818 ,  G03G2215/0861

摘要： A developing roller employed in a developer in which toner carried on the surface of the roller which is or not brought into contact with a photosensitive element is supplied at least onto the photosensitive element, and which is incorporated in an apparatus of electrophotography type such as a printer, a copier, or a facsimile machine. A conductive elastic layer is provided around a conuctive shaft and the outer circumference is covered with a surface layer which is made of resin composition whose contact angle is more than 35 DEG when measured using a liquid whose main component is similar to the resin component of the toner as a dripped liquid. Filming does not occur, the initial image density is good and the toner crackings are reduced.