Fixing unit
An image forming apparatus includes a heating rotary member, a pressure rotary member, a nip portion formed by the rotary members, a temperature adjustment control section controlling a temperature of the heating rotary member to a target temperature, a cleaning web removing toner adhering to the heating rotary member, and a controller selectively executing one of a cleaning mode and a non-cleaning mode. A first basis weight and a second basis weight greater than the first predetermined basis weight are set, in a job that mixedly uses recording media with the first and second basis weights. When the controller executes the non-cleaning mode, the temperature adjustment control section sets a target temperature of a recording medium with a basis weight less than or equal to the first basis weight to a temperature lower than a target temperature of the recording medium in the cleaning mode.
1. An image forming apparatus comprising:
a heating rotary member arranged to heat an unfixed toner image born on a recording medium;
a pressure rotary member arranged to pressurize the heating rotary member;
a nip portion formed by the pressure rotary member and the heating rotary member and arranged to, when a recording medium bearing a toner image is conveyed to the nip portion, fix the toner image on the recording medium;
a temperature adjustment control section configured to control a temperature of the heating rotary member such that the temperature of the heating rotary member becomes a target temperature;
a cleaning web arranged to remove toner adhering to the heating rotary member; and
a controller configured to execute one mode from among a plurality of modes including a cleaning mode in which the cleaning web cleans toner during image formation and a non-cleaning mode in which the cleaning web does not clean toner during image formation,
wherein a first predetermined basis weight and a second predetermined basis weight greater than the first predetermined basis weight are set, and
wherein a target temperature of a recording medium with the first predetermined basis weight in a case where the non-cleaning mode is executed is lower than a target temperature of the recording medium with the first predetermined basis weight in a case where the cleaning mode is executed.
2. The image forming apparatus according to claim 1 , wherein
a target temperature of a recording medium with the second predetermined basis weight in a case where the non-cleaning mode is executed is higher than a target temperature of the recording medium with the second predetermined basis weight in a case where the cleaning mode is executed.
3. The image forming apparatus according to claim 1 , further comprising:
a collector roller arranged to be brought into contact with the heating rotary member and collect toner adhering to the heating rotary member; and
a contact and separation unit arranged to bring the cleaning web into contact with and separate from the collector roller, wherein
when the controller executes the non-cleaning mode, the contact and separation unit is arranged to separate the cleaning web from the collector roller.
4. The image forming apparatus according to claim 1 , further comprising
a control section configured to, when image formation is not able to be performed due to the cleaning mode, display a prompt to replace the cleaning web.