Patent ID: 7245865
Filing Date: 2007-07-17
Classification: G03G

Abstract:
1. A transfer apparatus which comprises a transfer belt having conductivity and an image forming unit pressed against said transfer belt to form an image using charged developing agent, and to transfer the image formed by said image forming unit to said transfer belt by applying a voltage to said image forming unit through said transfer belt in a primary transfer process, and further to transfer the image transferred in said primary transfer process to a transfer material in a secondary transfer process, while said transfer belt is made to move in a predetermined direction, wherein said transfer belt has such electric characteristics that a surge current of not less than a predefined value flows within a predetermined time upon application of a voltage in said primary transfer process, said predetermined time being specified by the moving speed of said transfer belt and a contact width in said predetermined direction between said transfer belt and said image forming unit so as to be not less than 10 msec and not more than 80 msec, and said predefined value being twice or more as large as a current flowing in said transfer belt after said predetermined time.