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US 5,893,821 AGranted
Roller for electrophotographic apparatus
AssigneeBridgestone Corporation
InventorsYukio Ando, Hajime Hasegawa, Shigeo Kuriyama, Yosuke Noda
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AssigneeBridgestone Corporation
InventorsYukio Ando, Hajime Hasegawa, Shigeo Kuriyama, Yosuke Noda
Estimating the term…
A roller is equipped with an elastic layer comprising a foam, wherein at least a part of the elastic layer is subjected to permanent compressional deformation by heating compression, and the cells in the elastic layer subjected to permanent compressional deformation by heating compression outnumber the cells therein before the heating compression; and a process for producing the above roller in high efficiency. The above process enables the production of the roller in which the surface state of only an arbitrary portion thereof is modified according to the purpose of use, and the roller thus obtained can exhibit high performances in a variety of applications including paper feed roller, developer conveying roller and so forth.
A roller for an electrophotographic apparatus or an electrostatic recording apparatus having an elastic layer comprising a foam, wherein at least a part of said elastic layer is subjected to permanent compressional deformation by heating compression, the elastic layer subjected to the permanent compressional deformation by heating compression having a hardness of about 10 to 70 deg. on Ascar C scale, and having a number of cells from a surface of the elastic layer to a depth of 1 mm therefrom being about 1.05 to 3.00 times the number of cells in a depth of over 1 mm from the surface.
Dependencies are inferred from the claim text.