Patent application number | Description | Published |
20120118877 | IMAGE HEATING APPARATUS - 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, 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 sensor for sensing the temperature of the image heating member; and a controller for controlling electric power supplied to the coil on the basis of an output of the sensor. The controller 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. | 05-17-2012 |
20120328338 | IMAGE HEATING APPARATUS, BEARING MOUNTING STRUCTURE AND RETAINING RING - An image heating apparatus includes a roller, a heating portion disposed within the roller, a bearing portion fitted around an end portion of the roller to rotably support the roller, and a retaining ring attached at an axially predetermined position of the roller to restrict the roller from moving in a axial direction of the roller with respect to the bearing portion. The retaining ring includes first and second projections fitted into a hole portion of the roller. Profiles of side surfaces of these first and second projections abutting edges of the hole portion in a circumferential direction are recessed in the circumferential direction. | 12-27-2012 |
20120328342 | IMAGE HEATING APPARATUS AND RECORDING MATERIAL FEEDING APPARATUS - An image heating apparatus includes a hollow image heating roller having a through hole at one axial end portion side thereof; a bearing fitted around the roller; a heat insulating bush fitted around the roller between the roller and the bearing; a retaining ring for preventing the heat insulating bush from moving relative to the roller; an annular spacer provided between the heat insulating bush and the retaining ring, the annular spacer being provided with an inwardly protruded key portion engageable with the through hole. | 12-27-2012 |
20130094887 | IMAGE HEATING APPARATUS - An image heater a hollow heating roller having a hole at an axial end portion thereof; a bearing supporting the heating roller; a heat insulating bush fitted between an outer surface of the heating roller and the bearing; a retaining ring for retaining the heat insulating bush in an axial direction of the heating roller, the retaining ring including a projection engaging with the hole; an annular spacer provided between the retaining ring and the heat insulating bush, wherein the spacer includes a connecting portion having a connecting hole, the retaining ring includes a hooking portion engaging with the connecting hole. | 04-18-2013 |
20130098900 | IMAGE HEATING APPARATUS - 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. | 04-25-2013 |