Patent application number | Description | Published |
20100028062 | IMAGE HEATING APPARATUS - The present invention relates to an image heating apparatus in which a nip portion is formed by a heating unit, which includes a flexible sleeve and a heater, and a pressure roller. The position of the heating unit is appropriately maintained by pressing the heating unit against the pressure roller using a pressure member so that the heating unit can contact two or more portions of a downstream side rim of a groove arranged on a frame that holds the heating unit, even when the pressure roller is rotated. | 02-04-2010 |
20110236090 | FIXING DEVICE AND FLEXIBLE SLEEVE USED IN THE FIXING DEVICE - A fixing device for fixing on a recording material a toner image formed on the recording material includes a flexible sleeve including a resinous base layer, a parting layer and an adhesive layer for bonding the base layer and the parting layer; a heater contacted to an inner surface of the sleeve; a pressing member for forming a nip, in which the recording material on which the toner image has been formed is nipped and conveyed, between itself and the sleeve to which the heater is contacted; a voltage applying member for applying a voltage, of a polarity identical to a polarity of toner; and a grounding member, contactable to the recording material in a nipped state in the nip, for grounding the recording material. In a thickness direction of the layers, an electric resistance of the adhesive layer is larger than that of the parting layer and the electric resistance of the parting layer is larger than that of the base layer. The voltage applying member applies the voltage to the sleeve in contact with the base layer. | 09-29-2011 |
20120020709 | IMAGE HEATING DEVICE AND PRESSING ROLLER FOR USE WITH THE IMAGE HEATING DEVICE - An image heating device for heating a toner image while nip-conveying a recording material, in a nip, on which the toner image is carried, includes a heating member; and a pressing roller, including an elastic layer, for forming the nip in contact with the heating member. The elastic layer of the pressing roller includes a thermosetting silicon rubber containing a thermal conductive filler. The thermosetting silicon rubber includes pore portions formed with resin microballoons and a pore connecting portion for connecting the pore portions. The elastic layer has a thermal conductivity of 0.15 W/mK to 0.5 W/mK. | 01-26-2012 |
20120183336 | IMAGE HEATING APPARATUS - The present invention relates to an image heating apparatus in which a nip portion is formed by a heating unit, which includes a flexible sleeve and a heater, and a pressure roller. The position of the heating unit is appropriately maintained by pressing the heating unit against the pressure roller using a pressure member so that the heating unit can contact two or more portions of a downstream side rim of a groove arranged on a frame that holds the heating unit, even when the pressure roller is rotated. | 07-19-2012 |
20120294641 | IMAGE HEATING APPARATUS - An image heating apparatus for heating a toner image in a nip while conveying a recording material on which the toner image is held is provided. The image heating apparatus includes a heater for generating heat by being supplied with electric power from an AC power source; a rotatable heating member for being heated by the heater; a pressing member for forming the nip in contact to the rotatable heating member; a temperature detecting portion for detecting a temperature of the heater or the rotatable heating member; and a controller for setting the electric power supplied to the heater every renewal cycle depending on a detected temperature by the temperature detecting portion. The renewal cycle is shorter in a rise period of the heater than in a period in which the recording material is conveyed in the nip. | 11-22-2012 |
20140169845 | FIXING DEVICE AND HEATER USED IN FIXING DEVICE - A heater used for a fixing device includes a substrate, first and second conductor patterns formed at either end of the substrate in the short direction of the substrate, a third conductor pattern formed between the first and second conductor patterns and separated from the two conductor patterns, a first heating member disposed between the first and third conductor patterns and electrically connected to the two conductor patterns, and a second heating member disposed between the second and third conductor patterns and electrically connected to the conductor patterns. The heater has both end regions in which the widths of the third conductor pattern in the short direction is smaller than that of a middle portion of the third conductor pattern. The widths of the first and second heating members in the end regions are smaller than the widths of the first and second heating members in the other region, respectively. | 06-19-2014 |
20150139706 | IMAGE HEATING APPARATUS - An image heating apparatus includes: a heater; a supporting member for supporting the heater; a high heat-conductive sheet sandwiched between a part of the heater and the supporting member. A recording material on which an image is formed is heated by heat from the heater. The supporting member includes a bearing surface contacting the sheet so as to apply pressure between the heater and the sheet and includes an opposing portion opposing a part of the heater not sandwiching the sheet. In a state in which the pressure is applied between the heater and the sheet, a thickness of the sheet is not less than a height of the stepped portion between the bearing portion and the opposing portion. | 05-21-2015 |
20150139708 | IMAGE HEATING APPARATUS - An image heating apparatus includes: a heater including a substrate and a heat generating element; a supporting member; a high heat-conductive member. The recording material on which an image is formed is heated by heat from the heater. The supporting member has a bottom region, where the supporting member supports the heater, including a first region where the supporting member contacts the high heat-conductive member so as to apply pressure between the heater and the high heat-conductive member and including a second region where the supporting member is recessed from the high heat-conductive member relative to the first region. At least a part of the first region overlaps, with respect to a movement direction of the recording material, with a region where the heat generating element is provided. | 05-21-2015 |