Image heating apparatus heating a toner image on a sheet by the magnetic flux from an excitation coil and controlling the electric power supply to the coil
US8606160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2012 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Dec 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/2053
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image heating apparatus includes a coil for generating a magnetic flux by a current flowing therethrough; an image heating member having an electroconductive layer in which an eddy current is produced by the magnetic flux by which heat is generated, the image heating member being effective to heat an image on a recording material; an electroconductive magnetic flux adjusting member movable from a first position and a second position to decrease the eddy current produced in the image heating member by the magnetic flux; a temperature sensor for sensing a temperature of image heating member; electric power control means for control electric power supplied to the coil on the basis of an output of the temperature sensor, wherein the electric power control means changes an electric power condition to be supplied to the coil before start of the movement from the first position to the second position of magnetic flux adjusting member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.