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.

Claims

12 · 1 independent · depth 4

12 granted claims

›1.independentA fixing apparatus comprising:na roller member which includesa core member extending in an axial direction of the roller member, and having a center p…+11

›2.↳ 1The fixing apparatus according to claim 1, wherein the support member includes a center support member located at the center in the axial direction, a…d2

›3.↳ 1The fixing apparatus according to claim 1, wherein the core member penetrates the support member.d2

›4.↳ 1The fixing apparatus according to claim 1, whereinnthe metal member includes a member to be heated which is elastic material with heat insulation cons…d2

›5.↳ 1The fixing apparatus according to claim 1, wherein the central part of the core member has an axial length a little larger than the shorter side of A3…d2

›6.↳ 1The fixing apparatus according to claim 1, wherein the support member is formed of a cylindrical rubber layer, the central part of the support member …d2

›7.↳ 1The fixing apparatus according to claim 1, wherein the support member is formed of a cylindrical rubber layer having a certain outside diameter and a …d2+2

›10.↳ 1The fixing apparatus according to claim 1, wherein a thickness of the support member in a direction perpendicular to the axial direction of the core m…d2+2

Classifications

3 codes

IPC · International Patent Classification

Section G — Physics

G03G15/20

USPC · US Patent Classification

399/330399/332

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Pendency

2.5 y

931 days filing → grant

Office actions

non-final + final

Responses

2 RCE

Examiner

Erika Villaluna

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Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20070297838 A1	27 Dec 2007

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