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US 7,024,146 B2Granted
Fusing roller of image forming apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsHwan-guem Kim, Durk-hyun Cho
Life of this patent
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Abstract
A fusing roller of an image forming apparatus including an outer metallic pipe, an inner metallic pipe disposed inside the outer metallic pipe, a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat with a power supply, an end cap and a gear cap respectively connected to both ends of the outer metallic pipe and electrically connected to the resistance heating body, an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe, and an inner insulator disposed between the resistance heating body and the inner metallic pipe. As a result, the outer insulator has a higher thermal conductivity than that of the inner insulator.
Claims45
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- the outer insulator comprises a first insulating sheet and a second insulating sheet that are layered from an outer side of the resistance heating body with a predetermined thickness.
5 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- the inner insulator includes a first insulating sheet, a second insulating sheet, and a third insulating sheet that are consecutively layered from the resistance heating body toward the inner metallic pipe with a predetermined thickness.
5 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- the outer metallic pipe is coated with a synthetic resin so that a coating layer is formed around an outer circumference of the outer metallic pipe.
5 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- an end cap and a gear cap respectively connected to both ends of the outer metallic pipe and electrically connected to the resistance heating body.
3 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- a resin film between the outer insulator and the outer metallic pipe.
3 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- the thickness of the inner metallic pipe is approximately half the thickness of the outer metallic pipe.
5 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the outer insulator has a higher thermal conductivity than that of the inner insulator, and
- the resistance heating body is comprised of either a nickel-chrome or a ferro-chrome.
5 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe, wherein the outer insulator comprises a first insulating sheet and a second insulating sheet that are layered from an outer side of the resistance heating body with a predetermined thickness;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein the inner insulator is thicker than the outer insulator.
3 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein the inner insulator is thicker than the outer insulator;
- and
- a resin film between the outer insulator and the outer metallic pipe.
4 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the inner insulator is thicker than the outer insulator, and
- the inner insulator includes a first insulating sheet, a second insulating sheet, and a third insulating sheet that are consecutively layered from the resistance heating body toward the inner metallic pipe with a predetermined thickness.
5 more elements
A fusing roller of an image forming apparatus comprising:
- an outer metallic pipe;
- an inner metallic pipe disposed inside the outer metallic pipe;
- a resistance heating body disposed between the outer and the inner metallic pipes, generating a resistance heat;
- an outer insulator interposed between the resistance heating body and the outer metallic pipe to transmit the resistance heat to the outer metallic pipe;
- and
- an inner insulator disposed between the resistance heating body and the inner metallic pipe, wherein;
- the inner insulator is thicker than the outer insulator, and
- the thickness of the inner metallic pipe is approximately half the thickness of the outer metallic pipe.
5 more elements
Dependencies are inferred from the claim text.