| US 7,515,842 B2 | ||
| Image forming apparatus with resistance controlled transfer member | ||
| Hiroki Takayanagi, Abiko (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Dec. 19, 2006, as Appl. No. 11/613,010. | ||
| Claims priority of application No. 2005-370165 (JP), filed on Dec. 22, 2005. | ||
| Prior Publication US 2007/0147861 A1, Jun. 28, 2007 | ||
| Int. Cl. G00G 15/00 (2006.01) | ||
| U.S. Cl. 399—45 [399/66; 399/313] | 4 Claims |
| 1. An image forming apparatus comprising:
an image bearing member configured to bear a toner image;
a transfer member having a temperature-dependent resistance value and being pressed against the image bearing member, the
transfer member being applied with a voltage so as to transfer the toner image on the image bearing member to a transfer material;
and
a resistance value changing unit configured to heat or cool the transfer member in such a way that the resistance value of
the transfer member is changed in accordance with the type of the transfer material,
wherein the resistance value changing unit decreases the temperature of the transfer member so as to increase the resistance
value of the transfer member, in accordance with the thickness of the transfer material being increased.
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