Patent ID: 9411274
Filing Date: 2016-08-09
CPC Classification: G03G

Claim Text:
1. An image forming apparatus for forming a toner image on a recording material, said image forming apparatus comprising: an image forming portion configured to form an unfixed toner image on the recording material; a fixing portion, including a heating member and a back-up member configured to cooperate with said heating member to form a nip, configured to fix the unfixed toner image on the recording material by heating the recording material bearing the unfixed toner image in the nip while feeding recording material; an air feeding portion configured to feed air to a non-sheet-passing area of at least one of said heating member and said back-up member, said air feeding portion including a fan configured to feed the air, an opening through which the air fed from said fan passes, and an adjusting member configured to adjust an opening amount of said opening; and a temperature detecting member configured to detect a temperature of the non-sheet-passing area, wherein said apparatus is configured to switch, when said fixing portion fixes the unfixed toner images on recording materials having the same widths measured in a direction perpendicular to a feeding direction of the recording materials, between a first air feeding operation with a first opening amount of said opening and a second air feeding operation with a second opening amount of said opening different from the first opening amount, according to the temperature detected by said temperature detecting member.