# US 7,609,991 B2 · Image heating apparatus with an axial flow fan for cooling a portion of a heating rotatable member

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- Number: US 7,609,991 B2
- Document ID: US7609991B2
- Status: Granted
- Kind: B2
- Application number: 11/846,687
- Filed: 2007-08-29
- Published: 2008-03-06
- Granted: 2009-10-27
- Earliest claimed: 2006-08-29
- Assignees: Canon Kabushiki Kaisha
- Inventors: Kohei Koshida
- Web page: https://patentgrep.com/patent/US7609991B2

## CPC

- G03G 15/2039: {with means for controlling the fixing temperature}
- G03G 15/2042: {specially for the axial heat partition}
- G03G 2215/00151: using edge limitations
- G03G 2215/2016: Heating belt
- G03G 2215/2035: the fixing nip having a stationary belt support member opposing a pressure member
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

An image heating apparatus includes a heating rotatable member for heating a toner image on a recording material at a nip; an axial flow fan for cooling the heating rotatable member at a longitudinal end portion thereof; wherein an axis of the axial flow fan extends from its outlet disposed adjacent the longitudinal end portion inclinedly toward a longitudinally central portion of the heating rotatable member.

## Claims

### Claim 1

An image heating apparatus comprising:
a heating rotatable member for heating a toner image on a recording material at a nip;
an axial flow fan for cooling said heating rotatable member at a longitudinal end portion thereof, and
a duct, extending along an axis of said axial flow fan, for guiding air flow provided by said axial flow fan toward said heating rotatable member;
wherein the axis of said axial flow fan extends from an outlet of said duct disposed adjacent the longitudinal end portion at an incline toward a longitudinally central portion of said heating rotatable member.

### Claim 2 (depends on 1)

An apparatus according to claim 1, wherein the axis of said axial flow fan and a rotational axis of said heating rotatable member form an angle of not less than 10° and not more than 80°.

### Claim 3

An image heating apparatus comprising:
a heating rotatable member for heating a toner image on a recording material at a nip;
an axial flow fan for cooling said heating rotatable member at a longitudinal end portion thereof by blowing cooling air thereon;
wherein a rotational axis of said axial flow fan is directed with longitudinal outward inclination relative to a rotational axis of said heating rotatable member toward a longitudinal end portion of said heating rotatable member.

### Claim 4 (depends on 3)

An apparatus according to claim 3, wherein the rotational axis of said axial flow fan and the rotational axis of said heating rotatable member form an angle of not less than 10° and not more than 80°.

### Claim 5 (depends on 3)

An apparatus according to claim 3, further comprising a duct, extending along the rotational axis of said axial flow fan, for guiding air flow provided by said axial flow fan toward said heating rotatable member.