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US 2014/0193170 A1Published application
Fixing device and image forming apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorsToshihiro Fukasaka, Hisae Shimizu
Life of this patent
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Abstract
A fixing film is formed by stacking a heating layer, an electrical conducting layer, and an insulation layer interposed between the heating layer and the electrical conducting layer. A current supplied from a secondary coil flows through stacked layers formed by the secondary coil, the heating layer, an electrical conducting member, and the electrical conducting layer. The electrical conducting member and electrical conducting layer function as a current return path.
Claims9
A fixing device comprising:
- a hollow fixing body configured to rotate and generate heat to heat an unfixed image carried by a sheet;
- a pressing body configured to rotate in press contact with the fixing body and add a pressure to the sheet;
- a pushing member configured to push the fixing body against the pressing body from an inner side of the fixing body and slide on the inner side of the fixing body;
- and
- a power supply unit configured to supply electric power for causing the fixing body to generate heat,
- wherein the fixing body is formed by stacked layers including a heating layer, an electrical conducting layer, and an insulation layer interposed between the heating layer and the electrical conducting layer,
- two electrodes of the power supply unit are configured to connect to the heating layer and the electrical conducting layer at one end portion of the fixing body in a rotation axis direction,
- the heating layer and the electrical conducting layer are connected by an electrical conducting member arranged in the fixing body at the other end portion of the fixing body in the rotation axis direction, and
- a current supplied from the power supply unit flows through one of two electrodes, the heating layer, the electrical conducting member, the electrical conducting layer and the other of the two electrodes.
6 more elements
An image forming apparatus comprising:
- an image forming unit configured to form an unfixed image on a sheet;
- and
- a fixing unit configured to fix the unfixed image onto the sheet by heating the sheet carrying the unfixed image and adding a pressure to the sheet,
- wherein the fixing unit comprises:
- a hollow fixing body configured to rotate and generates heat to heat the unfixed image carried by the sheet;
- a pressing body configured to rotate in press contact with the fixing body and adds a pressure to the sheet;
- a pushing member configured to push the fixing body against the pressing body from an inner side of the fixing body and slides on the inner side of the fixing body;
- and
- a power supply unit configured to supply electric power for causing the fixing body to generate heat,
- wherein the fixing body is formed by stacked layers including a heating layer, an electrical conducting layer, and an insulation layer interposed between the heating layer and the electrical conducting layer,
- two electrodes of the power supply unit are connected to the heating layer and the electrical conducting layer at one end portion of the fixing body in a rotation axis direction,
- the heating layer and the electrical conducting layer are connected by an electrical conducting member arranged in the fixing body at the other end portion of the fixing body in the rotation axis direction, and
- a current supplied from the power supply unit flows through one of the two electrodes, the heating layer, the electrical conducting member, the electrical conducting layer and the other of the two electrodes.
10 more elements
Dependencies are inferred from the claim text.