Fixing unit and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShoichiro Ikegami, Kohei Okayasu
Life of this patent
Estimating the term…
Abstract
A fixing unit includes a rotary member, a contact portion arranged in an internal space of the rotary member, a pressing member configured to be in contact with an outer surface of the rotary member, and a heating portion configured to heat the rotary member such that the rotary member heats an image on a recording material being nipped in and conveyed through a nip portion between the rotary member and the pressing member. A lubricant is applied between the inner surface of the rotary member and the contact portion. The lubricant contains abase oil at a ratio of 80% or more with respect to a total mass of the lubricant. A developed interfacial area ratio of the inner surface of the rotary member is 0.10 or more and 0.50 or less.
Claims14
A fixing unit comprising:
- a rotary member formed in a tubular shape and configured to rotate;
- a contact portion arranged in an internal space of the rotary member and configured to be in sliding contact with an inner surface of the rotary member;
- a pressing member configured to be in contact with an outer surface of the rotary member and arranged to sandwich the rotary member together with the contact portion;
- and
- a heating portion configured to heat the rotary member such that the rotary member heats an image on a recording material being nipped in and conveyed through a nip portion between the rotary member and the pressing member and thus the image is fixed to the recording material,
- wherein a lubricant is applied between the inner surface of the rotary member and the contact portion,
- wherein the lubricant contains a base oil at a ratio of 80% or more with respect to a total mass of the lubricant, and
- wherein a developed interfacial area ratio of the inner surface of the rotary member is 0.10 or more and 0.50 or less.
Dependencies are inferred from the claim text.