FIXING DEVICE AND FIXING TEMPERATURE CONTROL METHOD OF FIXING DEVICE

摘要

According to one embodiment, a fixing device includes determination means for determining a size of an image forming area of a medium, heating means for including an endless rotating body, plural heat-generating members which are formed in a perpendicular direction to a transport direction and divided by a predetermined length, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction of these heat-generating members, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and nipping and carrying the medium in the transport direction along with the heating means, and heating control means for controlling the switching unit to select and conduct heat-generating members and controlling the heating means to heat the medium.

主权项

1. A fixing device comprising:
determination means for determining a size of an image forming area of a medium on which a toner image is formed; heating means for including an endless rotating body, a plurality of heat-generating members, and a switching unit, and for heating the medium, the plurality of heat-generating members being formed in a perpendicular direction to a transport direction of the medium and divided by a predetermined length, and being disposed so as to come into contact with an inner side of the rotating body, and the switching unit switching individual conduction of these heat-generating members; pressing means for forming a nip by performing pressing and contact at a position of the plurality of heat-generating members in the heating means, and for nipping and carrying the medium in the transport direction along with the heating means; and heating control means for controlling the switching unit to select and conduct heat-generating members corresponding to a position through which the image forming area of the medium passes and for controlling the heating means to heat the medium.