| US 7,580,649 B2 | ||
| Fixing device for image forming apparatus and control method thereof | ||
| Osamu Takagi, Chofu (Japan); Satoshi Kinouchi, Shinjuku-ku (Japan); Yoshinori Tsueda, Fuji (Japan); and Toshihiro Sone, Yokohama (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan); and Toshiba Tec Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Apr. 17, 2007, as Appl. No. 11/736,082. | ||
| Prior Publication US 2008/0260408 A1, Oct. 23, 2008 | ||
| Int. Cl. G03G 15/20 (2006.01) | ||
| U.S. Cl. 399—69 [399/321; 399/331; 399/334] | 28 Claims |
| 1. A fixing device for an image forming apparatus comprising:
an image-side rotating member;
a non-image-side rotating member configured to nip and carry a fixing target medium having a toner image thereon into a predetermined
direction together with the image-side rotating member;
a first heating source configured to heat the image-side rotating member,
a second heating source including a first heater configured to heat a total length range of the non-image-side rotating member
and a second heater configured to heat a second range of the non-image-side rotating member, the total-length range of the
non-image-side rotating member covering a total length in the direction of a rotation axis of the non-image-side rotating
member, the second range being narrower than the total-length range of the non-image-side rotating member; and
a control unit configured to variably control power to be supplied to the first heating source and/or the second heating source
while the image-side rotating member is carrying out an arbitrary operation mode.
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