Fixing device and image forming apparatus incorporating same having a tube which penetrates through a heater and passes infrared rays to a temperature detector
US8718502B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2012 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jul 28, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2039
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fixing device includes a fixing rotary body rotatable in a predetermined direction of rotation to radiate infrared rays; a pressing rotary body, rotatable in a direction counter to the direction of rotation of the fixing rotary body, pressed against the fixing rotary body to form a fixing nip therebetween through which a recording medium bearing a toner image is conveyed; a heater disposed opposite the fixing rotary body to heat the fixing rotary body; a temperature detector spaced apart from the fixing rotary body to detect a temperature of the fixing rotary body based on the infrared rays from the fixing rotary body and disposed below the fixing nip in a vertical direction; and a tube disposed between the fixing rotary body and the temperature detector, the tube through which the infrared rays from the fixing rotary body enter the temperature detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.