HEATING DEVICE, FIXING DEVICE, AND IMAGE FORMING APPARATUS

Abstract

A heating device includes a rotator, a heating source, a rotator holder, and a liquid or semi-solid substance. The rotator is rotatably held. The heating source heats the rotator. The rotator holder holds a longitudinal end portion of the rotator. The rotator holder includes a reflector disposed at least at a portion to be irradiated with radiant heat emitted from the heating source to reflect the radiant heat. The reflector has a reflectance of not less than 60%. The liquid or semi-solid substance has lubricity and adheres to the rotator holder.

Description

Claims

1. A heating device comprising: a rotator rotatably held;a heating source configured to heat the rotator;a rotator holder holding a longitudinal end portion of the rotator,the rotator holder including a reflector disposed at least at a portion to be irradiated with radiant heat emitted from the heating source to reflect the radiant heat,the reflector having a reflectance of not less than 60%; anda liquid or semi-solid substance having lubricity and adhering to the rotator holder.

2. The heating device according to claim 1, wherein the reflector has a reflectance of not less than 75%.

3. The heating device according to claim 1, wherein the rotator holder includes: a base; anda surface layer on a surface of the base,the surface layer including the reflector.

4. The heating device according to claim 3, wherein the surface layer is made of a heat-resistant material.

5. The heating device according to claim 3, wherein the surface layer is a silver vapor deposition layer.

6. The heating device according to claim 3, wherein the surface layer is a film adhering to the base.

7. The heating device according to claim 3, wherein the surface layer is a paint layer.

8. The heating device according to claim 1, wherein the rotator holder has a temperature of not greater than 210° C. during 10 minutes of continuous printing.

9. The heating device according to claim 1, wherein the rotator holder has a temperature of not greater than 200° C. during 10 minutes of continuous printing.

10. The heating device according to claim 1, wherein the rotator holder has a temperature of not greater than 194° C. during 10 minutes of continuous printing.

11. The heating device according to claim 1, wherein the rotator holder has a temperature of not greater than 185° C. during 10 minutes of continuous printing.

12. A fixing device comprising: the heating device according to claim 1, configured to heat a recording medium bearing an unfixed image; anda counter rotator facing an outer circumferential surface of the rotator of the heating device to fix the unfixed image onto the recording medium.

13. An image forming apparatus comprising the fixing device according to claim 12.

14. An image forming apparatus comprising the heating device according to claim 1.