Method for evaluating fixing member and fixing belt and thermal fixing roller
AssigneeRicoh Company, Ltd.
InventorsNorihiko Aze, Kyoichi Ashikawa, Kohji Kamiya, Minoru Matsuo, Takayuki Yoshii, Nozomu Takahata
Life of this patent
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Abstract
In a method for evaluating a fixing member to fix a toner having a surface layer, a hardness test is carried out by applying a pressure deformation from the surface side of the fixing member, and when a deformation of the surface layer by the pressure deformation is within an elastic range, the fixing member is regarded as a standard product.
Claims2
A fixing belt used to fix a toner, wherein when a measurement is carried out by measuring a hardness value equal to a pressure applied to a surface of the belt by a probe load divided by an area of indentation as a function of indentation depth measured while the pressure is applied at a test environment temperature of 25° C.,
- the hardness value for an indentation depth of 1 μm from the surface of the belt is less than or equal to 30 N/mm2, and
- the hardness value for an indentation depth of 4 μm is less than or equal to 12 N/mm2.
Dependencies are inferred from the claim text.