Abstract: A heat-resistant endless resin belt including a heat-resistant resin sheet, which can be employed in a thermal fixing apparatus, wherein the sheet includes two cutting work parts in an inclined shape. The two parts are overlapped with each other and bonded with an adhesive to form a bonding part. An external shape displacement f(x), measured via a flatness measuring apparatus, which scans the belt in a width direction thereof, satisfies a following formula ? 0 x ? ? f ? ( x ) - g ? ( x ) ? ? ? ? x ? XL 6800 , wherein “X” (mm) is a length of the belt in a width direction thereof; “L” (mm) is a perimeter of the belt and “g(x)” represents a displacement of an ideal shape of the heat-resistant resin belt, when g(x)=C (a constant), a left side of the formula is set to be a minimum; whilst when g(x) is a variable, the displacement of the ideal shape of the belt is set.

Abstract: A heat-resistant endless resin belt including a heat-resistant resin sheet, which can be employed in a thermal fixing apparatus, wherein the sheet includes two cutting work parts in an inclined shape. The two parts are overlapped with each other and bonded with an adhesive to form a bonding part. An external shape displacement f (x), measured via a flatness measuring apparatus, which scans the belt in a width direction thereof, satisfies a following formula ? 0 x ? ? f ? ( x ) - g ? ( x ) ? ? ? ? x ? XL 6800 , wherein “X” (mm) is a length of the belt in a width direction thereof; “L” (mm) is a perimeter of the belt and “g (x)” represents a displacement of an ideal shape of the heat-resistant resin belt, when g (x)=C (a constant), a left side of the formula is set to be a minimum; whilst when g (x) is a variable, the displacement of the ideal shape of the belt is set.

Abstract: A fixing device configured to fix a toner image onto a recording medium includes a coil for generating a magnetic flux and a heat generation member for generating heat by the magnetic flux; the heat generation member includes a hollow cylinder shape, the coil has a loop-shaped coil disposed in a loop shape to sandwich inner and outer circumference planes of the heat generation member of the hollow cylinder shape, the loop-shaped coil is divided into an inside coil portion, which is positioned in the inner circumference plane side of the heat generation member, and an outside coil portion which is positioned in the outer circumference plane side of the heat generation member, and a terminal portion for connecting both of the coil portions is provided between the inside coil portion and the outside coil portion.

Abstract: In a fixing member having an elastic layer of heat resistance rubber provided on a substrate and a separation layer of fluorocarbon resin provided on the elastic layer, the fluorocarbon resin is that a tensile strength of a 30 ?m coating film burned at 340° C. is equal or greater than 25 MPa. The heat resistance rubber includes, for example, silicone rubber or fluorosilicone rubber as a major component. The fluorocarbon resin includes PFA as a major component, for example.

Abstract: A fixing device configured to fix a toner image onto a recording medium includes a coil for generating a magnetic flux and a heat generation member for generating heat by the magnetic flux; the heat generation member includes a hollow cylinder shape, the coil has a loop-shaped coil disposed in a loop shape to sandwich inner and outer circumference planes of the heat generation member of the hollow cylinder shape, the loop-shaped coil is divided into an inside coil portion, which is positioned in the inner circumference plane side of the heat generation member, and an outside coil portion which is positioned in the outer circumference plane side of the heat generation member, and a terminal portion for connecting both of the coil portions is provided between the inside coil portion and the outside coil portion

Abstract: In a fixing member (10) having an elastic layer (2) of heat resistance rubber provided on a substrate 1 and a separation layer (3) of fluorocarbon resin provided on the elastic layer, the fluorocarbon resin is that a tensile strength of a 30 &mgr;m coating film burned at 340° C. is equal or greater than 25 MPa. The heat resistance rubber includes, for example, silicone rubber or fluorosilicone rubber as a major component. The fluorocarbon resin includes PFA as a major component, for example.