Fixing apparatus

A fixing apparatus that fixes an image on a recording material, the fixing apparatus comprising:

• a tubular film;
• a nip forming member that contacts an inner surface of the film;
• and
• a roller that forms a nip together with the nip forming member via the film, the roller having a region where a diameter of the roller differs depending on a position in a generatrix direction of the film,
• wherein the nip portion is an area where the film and the roller are in contact with each other and where the recording material is conveyed,
• wherein the nip forming member has a protruding portion, protruding toward the roller and extending in the generatrix direction, that is provided on at least one of an upstream side and a downstream side in the nip portion in a conveying direction, and
• wherein an area of the protruding portion corresponding to a portion of the roller where the diameter thereof is relatively large in the generatrix direction is positioned at a larger distance from a center of the nip portion in the conveying direction than an area of the protruding portion corresponding to a portion of the roller where the diameter thereof is relatively small in the generatrix direction.

A fixing apparatus that fixes an image on a recording material, the fixing apparatus comprising:

• a tubular film;
• a nip forming member that contacts an inner surface of the film;
• and
• a pressuring member that forms a nip together with the nip forming member via the film,
• wherein the nip portion is an area where the film and the pressing member are in contact with each other and where the recording material is conveyed, a width of the nip portion in a conveying direction of the recording material being different depending on a position in a generatrix direction of the film,
• wherein the nip forming member has a protruding portion, protruding toward the pressuring member and extending in the generatrix direction, provided on at least one of an upstream side and a downstream side in the nip portion in the conveying direction, and
• wherein an area of the protruding portion corresponding to a portion of the nip where the width thereof in the conveying direction is relatively large in the generatrix direction is positioned at a larger distance from a center of the nip portion in the conveying direction than a portion of the nip where the width thereof is relatively small in the generatrix direction.

A fixing apparatus that fixes an image on a recording material, the fixing apparatus comprising:

• a tubular film;
• a nip forming member that contacts an inner surface of the film;
• and
• a pressuring member that forms a nip portion together with the nip forming member via the film,
• wherein the nip portion is an area where the film and the pressing member contact each other and where the recording material is conveyed, a width of the nip portion in a conveying direction of the recording material being different depending on a position in a generatrix direction of the film,
• wherein the nip forming member has a protruding portion, protruding toward the pressuring member and extending in the generatrix direction, provided on at least one of an upstream side and a downstream side in the nip portion in the conveying direction, and
• wherein a position of the protruding portion in the conveying direction differs depending on the width of the nip in the conveying direction.