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US 8,913,937 B2Granted
Roller for fixing apparatus, and image heating apparatus having roller for image fixing apparatus
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Sakakibara
Life of this patent
Estimating the term…
Abstract
A roller for a fixing device includes a foam layer; an elastic layer containing a thermo-conductive filler and provided outside of the foam layer; a middle layer provided between the foam layer and elastic layer; wherein a content of all filler in the middle layer is smaller than a content of all filler in the elastic layer.
Claims22
A roller for a fixing device, said roller comprising:
- a foam layer including porous cells;
- an elastic layer containing a thermo-conductive filler and provided outside of said foam layer;
- and
- a middle layer provided between said foam layer and said elastic layer;
- wherein said middle layer is free of the porous cells, and
- wherein said middle layer is free of all filler including said thermo-conductive filler, or a content of all filler in said middle layer is smaller than a content of all filler in said elastic layer.
3 more elements
An image heating apparatus comprising:
- a heating unit for heating an image formed on a recording material;
- a roller cooperative with said heating unit to form a nip for nipping and feeding the recording material,
- said roller comprising:
- a foam layer including porous cells;
- an elastic layer containing a thermo-conductive filler and provided outside of said foam layer;
- and
- a middle layer provided between said foam layer and said elastic layer;
- wherein said middle layer is free of the porous cells, and
- wherein said middle layer is free of all filler including said thermo-conductive filler, or a content of all filler in said middle layer is smaller than a content of all filler in said elastic layer.
6 more elements
Dependencies are inferred from the claim text.