Belt-type fixing apparatus with pressure roller

An image fixing apparatus, comprising:

• a roller cooperating with a member to form a nip for feeding a recording material carrying an unfixed image, wherein the unfixed image is fixed on the recording material while the recording material is fed through the nip;
• and
• driving means for driving said roller to feed the recording material;
• wherein said roller has a surface resin tube layer, and wherein a center line average surface roughness Ra (.mu.m), a dynamic friction coefficient .mu., and a peripheral speed V (mm/sec) of said roller satisfy:
• when Ra 0.3,
• .mu..gtoreq.1.3.times.10.sup.-3 V+0.18
• when Ra.gtoreq.0.3
• 0.37.gtoreq.Ra.times..mu..gtoreq.6.4.times.10.sup.-4 V+4.8.times.10.sup.-3.
• 16.

An image fixing apparatus, comprising:

• a film;
• a driving roller contactable to said film and for driving said film, wherein a recording material carrying an unfixed image is fed between said driving roller and said film to fix the unfixed image on the recording material;
• and
• wherein said driving roller has a surface resin tube layer of fluorine resin material, and said tube layer further comprises a resin material different from the fluorine resin material.

An image fixing apparatus, comprising:

• a film;
• a driving roller contactable to said film and for driving said film, wherein a recording material carrying an unfixed image is fed between said driving roller and said film to fix the unfixed image on the recording material;
• and
• wherein said driving roller has a surface resin tube layer of resin material, and said tube layer further comprises a rubber material.

An image fixing apparatus, comprising:

• a film;
• and
• a driving roller contactable to said film and for driving said film, wherein a recording material carrying an unfixed image is fed between said driving roller and said film to fix the unfixed image on the recording material;
• wherein said driving roller has a surface tube layer of resin material, said tube layer having a surface subjected to electric discharge treatment, and
• wherein axially end portions of said driving roller are subjected to the electric discharger to a greater extent than an axially central portion of said driving roller.