Patent ID: 6999692
Filing Date: 2006-02-14
Classification: G03G

Abstract:
1. A color image forming apparatus having a plural-color image print mode for successively forming images of plural colors, and a single-color image print mode for forming an image of a single color, and capable of forming, in the plural-color image print mode, a frame of a single-color image, and thereafter superimposing and forming an image of the next color on the single-color image, said color image forming apparatus comprising: a fixing apparatus for fixing an image on a recording medium on which an image of plural colors or a single color has been formed; and a temperature controlling portion for controlling a temperature of said fixing apparatus so as to become a target temperature, wherein said fixing apparatus comprises a heating member and a pressure member and transports the recording medium to a nip part constituted by said heating member and said pressure member, and said temperature controlling portion, when printing of plural sheets is to be continuously effected, changes over the target temperature of said heating member when a predetermined number of sheets has been printed, and also changes the predetermined number of sheets for which the target temperature should be changed over, during single-color image printing and during plural-color image printing.