Fixing device in electrophotography technology

A fixing device, comprising:

• an endless belt having a particular width;
• a plate disposed inside of a loop of the endless belt and extending in a widthwise direction that is parallel to the particular width, the plate contacting an inner peripheral surface of the endless belt;
• a girder disposed inside of the loop of the endless belt and extending in the width direction, the plate being disposed between the girder and the endless belt;
• a pressing member disposed outside of the loop of the endless belt and extending in the widthwise direction, the pressing member contacting an outer peripheral surface of the endless belt and pressing the endless belt toward the plate in a first direction;
• a heater disposed inside the loop pf the endless belt;
• a first support disposed between the plate and the girder and extending in the widthwise direction, the first support contacting the plate and the girder;
• a second support disposed between the plate and the girder and extending in the widthwise direction, the second support contacting the plate and the girder while being away from the first support in a forward direction of the endless belt, the forward direction being perpendicular to the widthwise direction;
• wherein
• the first support has a first height at a center region of the first support in the widthwise direction
• the first support has a second height at an end portion of the first support in the widthwise direction
• the second support has a first height at a center region of the second support in the widthwise direction,
• the second support has a second height at an end portion of the second support in the widthwise direction,
• the first height of the second support is greater than the second height of the second support, and
• a first difference between the first height of the first support and the second height of the first support is less than a second difference between the first height of the second support and the second height of the second support.