| 发明名称 | Fixing device and image forming apparatus including same | ||
| 摘要 | A fixing device includes a fixing rotary body, an opposed member, a heater, and a heating controller. The opposed member opposes the fixing rotary body to form a nipping portion therebetween. The heater includes heat generators arranged in a width direction of a recording medium. When the recording medium fed to the nipping portion has an image area and a non-image area, the heating controller controls the outputs of the heat generators based on image information so that a first heat generator of the heat generators corresponding to the image area is higher in temperature and a second heat generator of the heat generators corresponding to the non-image area is lower in temperature. Based on information other than the image information, the heating controller temporarily shifts an area of the fixing rotary body corresponding to the non-image area to a temperature differing from a normal temperature. | ||
| 申请公布号 | US9069302(B2) | 申请公布日期 | 2015.06.30 |
| 申请号 | US201414167121 | 申请日期 | 2014.01.29 |
| 申请人 | Ricoh Company, Ltd. | 发明人 | Samei Masahiro;Waida Takumi;Ono Hiroshi;Yamamoto Takeshi;Fujimoto Ippei;Seo Hiroshi;Ishigaya Yasunori;Kishi Kazuhito;Yamashina Ryota |
| 分类号 | G03G15/20 | 主分类号 | G03G15/20 |
| 代理机构 | Oblon, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A fixing device comprising: a fixing rotary body; an opposed member opposing the fixing rotary body to form a nipping portion between the opposed member and the fixing rotary body; a heater to heat the fixing rotary body, the heater including plural heat generators arranged in a width direction of a recording medium fed to the nipping portion; and a heating controller to separately control outputs of the heat generators, wherein, when the recording medium fed to the nipping portion has an image area and a non-image area, the heating controller controls the outputs of the heat generators based on image information so that a first heat generator of the heat generators corresponding to the image area is higher in temperature and a second heat generator of the heat generators corresponding to the non-image area is lower in temperature, and wherein, based on information other than the image information, the heating controller temporarily shifts an area of the fixing rotary body corresponding to the non-image area to a temperature differing from a normal temperature. | ||
| 地址 | Tokyo JP | ||