Patent ID: 9671733
Date: 2017-06-06
CPC Classifications: G03G

Claim:
1. A fixing device comprising: a first pressure roller having an elastic layer in a surface layer section; a fixing belt wound on the elastic layer of the first pressure roller; a second pressure roller that presses the elastic layer of the first pressure roller via the fixing belt, the second pressure roller forming a fixing nip portion through which a recording sheet is conveyed as being held between the fixing belt and the second pressure roller; and a guide member that guides the fixing belt in such a manner as to separate the fixing belt from a protruding portion of the elastic layer, the protruding portion being formed on an entrance side of the fixing nip portion in a sheet conveying direction; wherein the guide member is located at a position between a second straight line and a third straight line, the second and third straight lines being obtained by inclining a first straight line to a sheet entering side about an end point at 40 degrees and 90 degrees, respectively, the end point being located on an upstream side of the fixing nip portion in a rotational direction of the fixing belt, and the first straight line passing through the end point and being in parallel to a straight line connecting a center of the first pressure roller and a center of the second pressure roller, and the recording sheet is conveyed in the fixing nip portion from a side of the second pressure roller lower than the third straight line.