Patent ID: 9400465
Filing Date: 2016-07-26
CPC Classification: G03G

Claim Text:
1. A fixing device fixing an image on a recording medium comprising: an endless fixing belt rotatably arranged around a first rotation axis; a pressuring member rotatably arranged around a second rotation axis in parallel to the first rotation axis and configured so as to form a nip part pressuring and making the recording medium pass through with the fixing belt; a heat source body arranged inside the fixing belt and configured so as to have a longitudinal shape extending in roughly parallel to the first rotation axis and to heat the fixing belt by emitting radiant heat; and a cover member arranged between the fixing belt and the heat source body and configured so as to cover the heat source body, wherein the nip part has a passing area as an area where the recording medium passes through and a non-passing area as an area outside the passing area in an axial direction, the cover member covers a part of the heat source body corresponding to the non-passing area, the cover member includes a plurality of through holes formed so as to adjust surface temperature of the heat source body, the cover member is further composed of an upper plate part at an upper side and lateral plate parts at its both sides and the plurality of through holes are formed in the upper plate part.