Patent ID: 9740150
Date: 2017-08-22
CPC Classifications: G03G

Claim:
1. A fixing device comprising: an elastic roller; and a back-up unit cooperative with said elastic roller to form a fixing nip therebetween, said back-up unit including a cylindrical film contacting said elastic roller, and a heat leveling member contacting an inner surface of said film to cooperate with said elastic roller to form a nip nipping said film, wherein a toner image is heat-fixed on a recording material while feeding the recording material carrying the toner image through said nip, and wherein said film includes a layer of thermoplastic resin material, and when said device fixes the toner image on a small size sheet, a temperature of a non-sheet-passage-part of said film rises to a temperature higher than a glass transition point of the thermoplastic resin material.