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US 4,268,943 AGranted
Elastic roller for image forming
AssigneeCanon Kabushiki Kaisha
InventorsTsuyoshi Watanabe, Hidetoshi Murase, Akira Murayama, Mikio Nakasugi
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AssigneeCanon Kabushiki Kaisha
InventorsTsuyoshi Watanabe, Hidetoshi Murase, Akira Murayama, Mikio Nakasugi
Estimating the term…
An elastic roller composed of an axial core member and an elastic, liquid retentive layer of foam structure with uniform layer thickness surrounding the circumference of said core member, said elastic roller further comprising a flexible, liquid permeable member in a form of cylinder or sleeve having an inner diameter smaller than the outer diameter of said roller, said flexible member being disposed to cover the circumference of said roller and having extensions extending beyond the both side ends of said roller and being shrunk along the ends of said elastic foam structure layer at the both sides respectively so as to cover also said both side ends of the layer with said flexible member. A method of making the elastic roller is also disclosed.
An elastic roller comprising an axial core member, and an elastic, liquid retentive layer of foam structure, having a uniform thickness, surrounding the circumference of said core member, said elastic roller further comprising a flexible, liquid permeable member in the form of a sleeve having an inner diameter smaller than the outer diameter of said roller, said flexible member being disposed to cover the circumference of said roller and having extensions extending beyond both ends of said roller and being shrunk along both ends of said elastic foam structure layer so as to cover also said both ends of the layer with said flexible member.
Dependencies are inferred from the claim text.