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US 7,257,361 B2Granted
Fixing apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsOsamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda, Toshihiro Sone
Life of this patent
Estimating the term…
Abstract
A fixing apparatus according to the present invention ensures a nip width larger than a certain value by a heating roller which has a thin film metal conductive layer, and a foamed rubber layer which is bonded to the end part of the metal conductive layer, formed with a gap in a center part, and not bonded to the metal conductive layer.
Claims7
A fixing apparatus comprising:
- a roller member which includes a hollow cylindrical metal member, and a support member provided inside the metal member,
- wherein the support member includes a core member extending in an axial direction of the roller member, an elastic layer located around the core member, a first circular cross section having a first outside diameter, and a second circular cross section having a second outside diameter smaller than the first outside diameter, and
- the first cross section of the support member contacts the inside of the metal member, and an entire outer circumference of the second cross section of the support member opposes to the metal member with a gap.
Dependencies are inferred from the claim text.