Fixing belt and fixing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNoriaki Kobayashi, Akeshi Asaka
Life of this patent
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Abstract
A fixing belt includes: a base having an endless shape; and a resin layer covering a surface on an inner peripheral side of the base, the resin layer comprising a resin and a filler, and having a second surface opposite to a first surface facing the base, the second surface having cell structures, and being roughened with the filler. When arithmetic mean roughnesses of the second surface in the central region X and the end regions Y and Z are defined as RaX, RaY and RaZ respectively, a difference between RaX and RaY, a difference between RaY and RaZ, and a difference between RaX and RaZ are all 0.1 μm or smaller, and a coefficient of variation of areas of the cell structures contained in each of the central region X, and end regions Y and Z is 25% or smaller.
Claims9
A fixing belt comprising:
- a base having an endless shape;
- and a resin layer covering a surface on an inner peripheral side of the base,
- the resin layer comprising a resin and a filler, the resin layer having a second surface opposite to a first surface facing the base, the second surface having cell structures, and
- the second surface being roughened with the filler, wherein
- when a length of the fixing belt in a longitudinal direction is defined as L, a region whose center is a middle point of the fixing belt in the longitudinal direction and having a width of L/7 is defined as a central region X, and regions having a width of L/7 from both ends of the fixing belt in the longitudinal direction toward the middle point are defined as end regions Y and Z respectively, and
- when arithmetic mean roughnesses of the second surface in the central region X and the end regions Y and Z are defined as RaX, RaY and RaZ respectively,
- a difference between RaX and RaY, a difference between RaY and RaZ, and a difference between RaX and RaZ are all 0.1 μm or smaller, and
- a coefficient of variation of areas of the cell structures contained in each of the central region X and the end regions Y and Z is 25% or smaller.
A fixing belt comprising:
- a base having an endless shape;
- and a resin layer covering a surface on an inner peripheral side of the base,
- the resin layer being a cured film of a coated film of a coating material for forming the resin layer, the coating material containing a filler and a resin raw material, the resin layer having a second surface opposite to a first surface facing the base, the second surface having cell structures derived from a convection type cell structure, and
- the second surface being roughened with the filler, wherein
- when a length of the fixing belt in a longitudinal direction is defined as L, a region whose center is a middle point of the fixing member in the longitudinal direction and having a width of L/7 is defined as a central region X, and regions having a width of L/7 from both ends of the fixing belt in the longitudinal direction toward the middle point are defined as end regions Y and Z respectively,
- a coefficient of variation of areas of the cell structures contained in each of the central region X and the end regions Y and Z is 25% or smaller.
A fixing apparatus comprising a fixing belt, the fixing belt comprising a base having an endless shape and a resin layer covering a surface on an inner peripheral side of the base, wherein
- the resin layer comprises a resin and a filler,
- the resin layer has a second surface opposite to a first surface facing the base,
- the second surface has cell structures, wherein
- the second surface is roughened with the filler;
- and wherein
- when a length of the fixing belt in a longitudinal direction is defined as L, a region whose center is a middle point of the fixing member in the longitudinal direction and having a width of L/7 is defined as a central region X, and regions having a width of L/7 from both ends of the fixing belt in the longitudinal direction toward the middle point are defined as regions Y and Z respectively, and
- arithmetic mean roughnesses of the second surface in the central region X and the end regions Y and Z are defined as RaX, RaY and RaZ respectively,
- a difference between RaX and RaY, a difference between RaY and RaZ, and a difference between RaX and RaZ are all 0.1 μm or smaller, and
- a coefficient of variation of areas of the cell structures contained in each of the central region X and the end regions Y and Z is 25% or smaller.
Dependencies are inferred from the claim text.