Abstract: The present invention provides a fixing apparatus includes a fixing roller 12, a heating source 14 for allowing the outer peripheral surface of the fixing roller 12 to have a given temperature capable of performing a fixing operation, a pressing roller 16 in rotational contact with the fixing roller 12, and a biasing member 18 for allowing the pressing roller 16 to be brought into press contact with the fixing roller 16 at a given pressure. The fixing apparatus is operable to allow a sheet with a surface supporting an unfixed toner thereon to pass through the rotational contact region along one direction so as to fix the unfixed toner onto the sheet. In this fixing apparatus, the fixing roller 12 is disposed on the side of the sheet surface supporting the unfixed toner, and the pressing roller 16 is disposed on the opposite side of the fixing roller 12 with respect to the sheet.

Abstract: The present invention provides an improved fixing apparatus capable of reliably releasing a sheet having toner fixed thereon from a fixing belt without any releasing pawl even in large-sized sheets. The fixing apparatus includes a fixing roller, a pressing roller in rotational contact with the fixing roller, a biasing member for applying a biasing force to the pressing roller so as to bring the pressing roller into press contact with the fixing roller at a given pressure, a heating roller disposed apart from the fixing roller, a fixing belt wound around both the heating and fixing rollers in an endless manner, and a heat-generating device embedded in the heating roller to heat the fixing belt so as to heat unfixed toner on a sheet passing through a rotational contact region between the fixing and pressing rollers, whereby when the sheet having unfixed toner on a surface thereof is passed through the rotational contact region along one direction, the unfixed toner is fixed onto the sheet.

Abstract: The present invention provides a fixing apparatus comprising a fixing roller 12, a heating source 14 for allowing the outer peripheral surface of the fixing roller 12 to have a given temperature capable of performing a fixing operation, a pressing roller 16 in rotational contact with the fixing roller 12, and a biasing member 18 for allowing the pressing roller 16 to be brought into press contact with the fixing roller 16 at a given pressure. The fixing apparatus is operable to allow a sheet with a surface supporting an unfixed toner thereon to pass through the rotational contact region along one direction so as to fix the unfixed toner onto the sheet. In this fixing apparatus, the fixing roller 12 is disposed on the side of the sheet surface supporting the unfixed toner, and the pressing roller 16 is disposed on the opposite side of the fixing roller 12 with respect to the sheet.

Abstract: The present invention provides an improved fixing apparatus capable of reliably releasing a sheet having toner fixed thereon from a fixing belt without any releasing pawl even in large-sized sheets. The fixing apparatus comprises a fixing roller, a pressing roller in rotational contact with the fixing roller, a biasing member for applying a biasing force to the pressing roller so as to bring the pressing roller into press contact with the fixing roller at a given pressure, a heating roller disposed apart from the fixing roller, a fixing belt wound around both the heating and fixing rollers in an endless manner, and a heat-generating device embedded in the heating roller to heat the fixing belt so as to heat unfixed toner on a sheet passing through a rotational contact region between the fixing and pressing rollers, whereby when the sheet having unfixed toner on a surface thereof is passed through the rotational contact region along one direction, the unfixed toner is fixed onto the sheet.

Abstract: A toner image fixing apparatus has a fixing roller, a pressing roller, and a heating roller. The pressing roller is normally urged toward the fixing roller for pressing a sheet with an unfixed toner image carried on a surface thereof against the fixing roller to fix the unfixed toner image to the sheet when the sheet passes in one direction through a rolling contact region between the fixing roller and the pressing roller. The heating roller is disposed on one side of the fixing roller opposite to the pressing roller. A first heat source is disposed in the heating roller for heating the heating roller, and a second heat source is disposed in the pressing roller for heating the pressing roller. An endless heat transfer belt is trained around the heating roller and the fixing roller for transferring heat from the first heat source to heat the unfixed toner image on the sheet when the sheet passes through the rolling contact region.

Abstract: The present invention provides a fixing apparatus which can secure a sufficient fixing performance even if a nip pressure is arranged in relatively low value. A fixing apparatus comprises a fixing member (12, 36) having an elastic layer (12B, 36B) formed on the fixing member at a side to which a sheet surface supporting an unfixed toner is contacted; a pressing member (18, 38) for making the sheet surface supporting the unfixed toner contact to the fixing member (12, 36) with a particular pressure and forming a nip portion between the fixing member and the pressing member; and a heating means (20) heating the fixing member(12, 36), wherein 0.05≦P·t/E≦0.50 is satisfied, where t (mm) is thickness of the elastic layer (12B, 36B), E (Pa) is Young's modulus of the elastic layer (12B, 36B) and P (Pa) is pressure in the nip portion.

Abstract: A toner image fixing apparatus has a fixing roller, a pressing roller, and a heating roller. The pressing roller is normally urged toward the fixing roller for pressing a sheet with an unfixed toner image carried on a surface thereof against the fixing roller to fix the unfixed toner image to the sheet when the sheet passes in one direction through a rolling contact region between the fixing roller and the pressing roller. The heating roller is disposed on one side of the fixing roller opposite to the pressing roller. A first heat source is disposed in the heating roller for heating the heating roller, and a second heat source is disposed in the pressing roller for heating the pressing roller. An endless heat transfer belt is trained around the heating roller and the fixing roller for transferring heat from the first heat source to heat the unfixed toner image on the sheet when the sheet passes through the rolling contact region.