| 发明名称 | Fixing device, image formation apparatus, and method of manufacturing fixing roller | ||
| 摘要 | A fixing device includes a fixing roller configured to be heated by a heat source, and a pressure roller configured to be in pressure-contact with the fixing roller. The fixing roller includes a cylindrical tubular core having an inner circumferential surface and one or more ribs protruded from the inner circumferential surface and extending spirally along the inner circumferential surface. The total number of times that the one or more spiral ribs cross through a region of contact between the fixing roller and the pressure roller is more than one, regardless of a rotation angle of the fixing roller. | ||
| 申请公布号 | US8805260(B2) | 申请公布日期 | 2014.08.12 |
| 申请号 | US201213622032 | 申请日期 | 2012.09.18 |
| 申请人 | Oki Data Corporation | 发明人 | Shimosugi Masahiko |
| 分类号 | G03G15/20 | 主分类号 | G03G15/20 |
| 代理机构 | Mots Law, PLLC | 代理人 | Motsenbocker Marvin A.;Mots Law, PLLC |
| 主权项 | 1. A fixing device comprising: a fixing roller configured to be heated by a heat source; and a pressure roller configured to be in pressure-contact with the fixing roller, wherein the fixing roller includes a cylindrical tubular core having an inner circumferential surface and at least one spiral rib protruding from the inner circumferential surface and extending spirally along the inner circumferential surface, and the total number of times that the at least one spiral rib crosses through a region of contact between the fixing roller and the pressure roller is more than one, regardless of a rotation angle of the fixing roller, wherein the at least one spiral rib has a lead angle at an axial middle region of the fixing roller smaller than a lead angle at an axial end region of the fixing roller, wherein the lead angle is an angle of the at least one spiral rib with respect to a plane extending orthogonal to an axis of the cylindrical tubular core. | ||
| 地址 | Tokyo JP | ||