Patent ID: 9229379
Filing Date: 2016-01-05
CPC Classification: G03G

Claim Text:
1. A fixing device, comprising: a rotatable fixing member; a heating source configured to heat the fixing member, the heating source including a radiant heater; an opposing member configured to come into contact with an outer circumferential surface of the fixing member to form a nip portion; and a shielding member configured to block heat from the heating source, wherein the shielding member is configured to rotate about a position different from the center of the heating source so as to be movable between a shielding position and a retraction position, the shielding position being a position where the shielding member comes close to the heating source to block heat from the heating source to the fixing member, the retraction position being a position where the shielding member is retracted away from the shielding position, wherein: the fixing member is an endless fixing belt, and the fixing device further includes a nip forming member configured to come into contact with the opposing member from an inner circumferential side of the fixing belt to form the nip portion.