Fixing device and image forming apparatus

摘要

A fixing device includes a fixing unit, a cleaning unit, and a controller. The fixing unit includes a pair of nipping members and a heat source that heats at least one of the pair of nipping members. The cleaning unit includes a cleaning web wound on a supply core to be supplied from the supply core and taken up on a take-up core, and a pressing roller that is pressed against one of the pair of nipping members. The controller causes the take-up core to rotate in such a manner that, when a leading portion of the cleaning web extending up to 2% of an overall length of the cleaning web from a leading end of the cleaning web is fed, a length of the cleaning web to be fed in one feeding is 10-30% larger than when a subsequent portion of the cleaning web is fed.

主权项

1. A fixing device comprising:
a fixing unit that
includes a pair of nipping members that are in pressure contact with each other, and a heat source that heats at least one of the pair of nipping members, andfixes toner onto a recording medium with heat and pressure by nipping the recording medium between the pair of nipping members; a cleaning unit that
includes a cleaning web wound on a supply core to be supplied from the supply core and taken up on a take-up core, and a pressing roller that is pressed by a pressure-applying member against one of the pair of nipping members, andbrings the cleaning web into contact with one of the pair of nipping members using the pressing roller, thereby cleaning the one of the pair of nipping members; and a controller that causes the take-up core to rotate in accordance with the number of sheets of the recording medium passed through between the pair of nipping members to feed the cleaning web from the supply core, wherein the controller causes the take-up core to rotate in such a manner that, when a leading portion of the cleaning web extending up to 2% of an overall length of the cleaning web from a leading end of the cleaning web is fed, a length of the cleaning web to be fed in one feeding is 10-30% larger than when a subsequent portion of the cleaning web is fed.