Abstract: An image forming apparatus includes a pressure roller, a driver that drives the rotation of the pressure roller, an endless fuser belt, a pressing member that is provided inside of the fuser belt to be opposite to the pressure roller and forms a nip portion where the fuser belt and the pressure roller come into contact with each other, a adjustment mechanism that adjusts a pressing force that presses one of the pressure roller and the pressing member to the other, a detector that detects a rotational load of the fuser belt, and a pressing force controller that controls the adjustment mechanism such that the pressing force is higher in an overload state where the rotational load of the fuser belt is equal to or more than a predetermined value than in a normal state where the rotational load of the fuser belt is less than the predetermined value.

Abstract: An image forming apparatus includes: a pressure roller; a heater that faces the pressure roller and forms a nip part with the pressure roller, the nip part being between the pressure roller and the heater; and a hardware processor that adjusts a pressing force for pressing either the pressure roller or the heater toward the other and determines the pressing force based on a size of a recording medium that passes through the nip part.

Abstract: A fixation apparatus includes a rotatable fixation belt, a pressurization roller which is in contact with an outer circumferential surface of the fixation belt and rotates the fixation belt, a pressing member which is provided to face the pressurization roller with the fixation belt being interposed and presses the fixation belt against the pressurization roller, a heating roller which provides heat to paper which passes through a portion of contact between the fixation belt and the pressurization roller by providing heat to the fixation belt, and an adjustment mechanism for adjusting an amount of attachment of a lubricant to an inner circumferential surface of the fixation belt. The adjustment mechanism adjusts the amount of attachment of the lubricant such that an amount of attachment of the lubricant while the fixation belt remains stopped is smaller than an amount of attachment of the lubricant during rotation of the fixation belt.

Abstract: A fixation apparatus includes a rotatable fixation belt, a pressurization roller which is in contact with an outer circumferential surface of the fixation belt and rotates the fixation belt, a pressing member which is provided to face the pressurization roller with the fixation belt being interposed and presses the fixation belt against the pressurization roller, a heating roller which provides heat to paper which passes through a portion of contact between the fixation belt and the pressurization roller by providing heat to the fixation belt, and an adjustment mechanism for adjusting an amount of attachment of a lubricant to an inner circumferential surface of the fixation belt. The adjustment mechanism adjusts the amount of attachment of the lubricant such that an amount of attachment of the lubricant while the fixation belt remains stopped is smaller than an amount of attachment of the lubricant during rotation of the fixation belt.

Abstract: An image forming apparatus has an outline surrounded by a casing. The casing has an opening. The image forming apparatus includes a fixing unit configured to fix an image formed on a recording medium, and a control unit. The fixing unit includes a heating fixing member. The control unit is configured to control an opening degree of the opening based on temperature of a surface of or in the vicinity of the heating fixing member, so as to prevent emission of a substance by an air current to outside of the casing through the opening, during an image forming operation.

Abstract: An image forming apparatus has an outline surrounded by a casing. The casing has an opening. The image forming apparatus includes a fixing unit configured to fix an image formed on a recording medium, and a control unit. The fixing unit includes a heating fixing member. The control unit is configured to control an opening degree of the opening based on temperature of a surface of or in the vicinity of the heating fixing member, so as to prevent emission of a substance by an air current to outside of the casing through the opening, during an image forming operation.