Fitzpatrick, Cella, Harper & Scinto
Image forming apparatus having intermediary transfer member and transfer member of size and hardness, respectively, satisfying specific formula
An image forming apparatus has an image bearing member for carrying a developed image; image forming unit for forming a developed image on said image bearing member; an intermediary transfer member onto which a developed image on said image bearing member is transferred; a transfer member, disposed at a position opposed to said image bearing member with the intermediary transfer member therebetween, for primary transfer of the developed image from said image bearing member onto said intermediary transfer member by application of a voltage thereto and pressing said intermediary transfer member to said image bearing member, transferring means for secondary transfer of the developed image from said intermediary transfer member onto a transfer material; wherein a maximum height Rmax (&mgr;m) representing a surface shape of said intermediary transfer member onto which the developed image is transferred, an average inclination angle &thgr;a (&deg;) representing a surface shape of said intermediary transfer member onto which the developed image is transferred, an urging force P (N) of said transfer member onto said intermediary transfer member, and ASKER C hardness of said transfer member R (&deg;) satisfy:&thgr;a<2.355&times;(P+11.4)/(R+94.2)&#8722;0.0174&times;Rmax.
Canon Kabushiki Kaisha
G G
G03G G03G
inventional additional
Takeshi Makoto
Tomizawa Saito