Apparatus for fixing toner images on a transfer material

A fixing apparatus for fixing toner images on a transfer material upon which toner images have been placed by applying heat to the transfer material, the fixing apparatus comprising:

• (a) a roll-shaped rotary member for applying heat to the transfer material upon which toner images have been placed, said roll-shaped rotary member including
• (1) a cylindrical ray-transmitting base member,
• (2) a ray absorbing layer for generating heat onto the transfer material upon which toner images have been placed so as to fix the toner on the transfer material, the ray absorbing layer, provided on an outer side of the ray-transmitting base member;
• (b) a ray irradiating device for irradiating ray to said ray absorbing layer, the ray irradiating device provided inside the cylindrical ray-transmitting base member;
• (c) bearing member for rotatably supporting the roll-shaped rotary member;
• and
• (d) an elastic covering member provided between the bearing member and the roll-shaped rotary member for joining each member;
• wherein the elastic covering member is a resin cap member having a slit portion in a part of a ring of the resin cap member so as to provide the elasticity in the radial direction of the ray-transmitting base member and to follow an expansion of the ray-transmitting base member.

A fixing apparatus for fixing toner images on a transfer material upon which toner images have been placed by applying heat to the transfer material, the fixing apparatus comprising:

• (a) a roll-shaped rotary member for applying heat to the transfer material upon which toner images have been placed, said roll-shaped rotary member including
• (1) a cylindrical ray-transmitting base member,
• (2) a ray absorbing layer for generating heat onto the transfer material upon which toner images have been placed so as to fix the toner on the transfer material, the ray absorbing layer, provided on an outer side of the ray-transmitting base member;
• (b) a ray irradiating device for irradiating ray to said ray absorbing layer, the ray irradiating device provided inside the cylindrical ray-transmitting base member;
• (c) bearing member for rotatably supporting the roll-shaped rotary member;
• and
• (d) an elastic covering member provided between the bearing member and the roll-shaped rotary member for joining each member;
• the elastic covering member comprises an elastic rubber portion and a covering portion of resin, and the covering portion is a flange member provided between the elastic rubber portion and the bearing member.

A fixing apparatus for fixing toner images on a transfer material upon which toner images have been placed by applying heat to the transfer material, the fixing apparatus comprising:

• (a) a roll-shaped rotary member for applying heat to the transfer material upon which toner images have been placed, said roll-shaped rotary member including
• (1) a cylindrical ray-transmitting base member,
• (2) a ray absorbing layer for generating heat onto the transfer material upon which toner images have been placed so as to fix the toner on the transfer material, the ray absorbing layer, provided on an outer side of the ray-transmitting base member;
• (b) a ray irradiating device for irradiating ray to said ray absorbing layer, the ray irradiating device provided inside the cylindrical ray-transmitting base member;
• (c) bearing member for rotatably supporting the roll-shaped rotary member;
• and
• (d) an elastic covering member provided between the bearing member and the roll-shaped rotary member for joining each member;
• a pressure roller applying a pressure to the roll-shaped rotary member, a nip portion being formed between the pressure roller and the roll-shaped rotary member,
• wherein, in the direction of an axis of the roll-shaped rotary member, a width of an area which the ray irradiating device irradiates light is narrower than a width of the nip portion and a width of the ray absorbing layer.

A fixing apparatus for fixing toner images on a transfer material upon which toner images have been placed by applying heat to the transfer material, the fixing apparatus comprising:

• (a) a roll-shaped rotary member for applying heat to the transfer material upon which toner images have been placed, said roll-shaped rotary member including
• (1) a cylindrical ray-transmitting base member,
• (2) a ray absorbing layer for generating heat onto the transfer material upon which toner images have been placed so as to fix the toner on the transfer material, the ray absorbing layer, provided on an outer side of the ray-transmitting base member, and
• (3) an elastic member provided on the outer side of the ray-transmitting base member;
• (b) a ray irradiating device for irradiating ray to said ray absorbing layer, the ray irradiating device provided inside the cylindrical ray-transmitting base member;
• (c) bearing member for rotatably supporting the roll-shaped rotary member;
• and
• (d) a pressure roller applying a pressure to the roll-shaped rotary member, a nip portion being formed between the pressure roller and the roll-shaped rotary member,
• wherein the elastic member is provided between the bearing member and the roll-shaped rotary member, and in the direction of an axis of the roll-shaped rotary member, a width of an area which the ray irradiating device irradiates light is narrower than a width of the nip portion and a width of the ray absorbing layer.