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US 2013/0259549 A1Published application
Heating roller having resistive heating element and fusing device including heating roller
AssigneeSamsung Electronics Co., Ltd.
InventorsJin-han KIM, Byung-sang YUN, Kyung-hwan KIM, Jun-o KIM, Young-dae KO
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Abstract
A heating roller including a resistive heating layer and a fusing device including the heating roller. By separately disposing a plurality of electrodes in an axis direction of the heating roller, and by independently controlling each electrode, the heating roller may correspond to various papers having different sizes. Accordingly, the temperature of the heating roller may be stably controlled.
Claims20
An electrophotography type image forming apparatus comprising:
- a electrophotographic type printing unit for transferring toner image onto a printing medium;
- and
- a fusing device for fusing the transferred toner image on the printing medium by heating and compressing the transferred toner image on the printing medium as the printing medium passes through a fixing nip,
- wherein the fusing device includes:
- a heating roller to generate heat;
- and
- a compressing element engaged to the heating roller to form the fixing nip,
- wherein the heating roller comprises:
- a supporter extending along a support axis and having a cylindrical outer circumference;
- a resistive heating layer being electrically conductive to receive electrical current and that is formed on the outer circumference of the supporter, wherein the resistive heating layer generates heat in response to the electrical current;
- and
- a plurality of electrodes, each of the plurality of electrodes being disposed between the supporter and the resistive heating layer, and electrically connected to the resistive heating layer to deliver the electrical current to the resistive heating layer, wherein the plurality of electrodes are spaced apart along a direction of the support axis of the supporter.
9 more elements
An electrophotography type image forming apparatus comprising:
- a electrophotographic type printing unit for transferring toner image onto a printing medium;
- and
- a fusing device for fusing the transferred toner image on the printing medium by heating and compressing the transferred toner image on the printing medium as the printing medium passes through a fixing nip,
- wherein the fusing device includes:
- a heating roller to generate heat;
- and
- a belt engaging an outer circumference of the heating roller and circulating around the outer circumference;
- a tension roller to apply tension to the belt;
- and
- a compressing element engaged with the tension roller to form a fixing nip,
- wherein the belt is disposed between the tension roller and the compressing element,
- wherein the heating roller comprises:
- a supporter extending along a supporter axis and having a cylindrical outer circumference;
- a resistive heating layer being electrically conductive to receive electrical current and that is formed on the outer circumference of the supporter, wherein the resistive heating layer generates heat in response to receiving the electrical current;
- and
- a plurality of electrodes disposed between the supporter and the resistive heating layer, and electrically connected to the resistive heating layer to supply power to the resistive heating layer, wherein the plurality of electrodes are spaced apart along a direction of the support axis of the supporter.
13 more elements
Dependencies are inferred from the claim text.