Fixing device

摘要

A fixing device includes a film, a heater contacting the film which has a substrate, a first heat generating segment on a first surface of the substrate, and a second heat generating segment on a second surface opposite to the first surface, a pressure member forming the nip portion, a temperature detection unit detecting a temperature of the second surface, and a control unit supplying power to the heater so that the detected temperature becomes a target temperature, wherein the control unit can perform a first heater control so as to supply power only to the first heat generating segment, and a first heater control so as to supply power only to the second heat generating segment, and wherein the target temperature during performing the second heater control is higher than the target temperature during performing the first heater control.

主权项

1. A fixing device for fixing a toner image onto a recording material while conveying and heating the recording material on which the toner image has been formed at a nip portion, the fixing device comprising:
a cylindrical film; a heater configured to contact the film, the heater including a substrate, a first heat generating segment formed on a first surface, facing the film, of the substrate, and a second heat generating segment formed on a second surface opposite to the first surface of the substrate; a pressure member configured to form the nip portion with the film; a temperature detection unit configured to detect the second surface; and a control unit configured to supply power to the heater so that the temperature detected by the temperature detection unit becomes a target temperature, wherein the control unit can perform a first heater control for controlling the heater so as to supply power only to the first heat generating segment, and a second heater control for controlling the heater so as to supply power only to the second heat generating segment, and wherein the target temperature during performing the second heater control is higher than the target temperature during performing the first heater control.