Granted Patent B2

US 7,627,279 · App. 11/839,581 · Granted Dec 1, 2009

Abstract

Claims (56)

1. A fuser assembly configured to fix a toner image to a sheet of print media, said fuser assembly comprising:

a fuser belt having a first side edge, a second side edge spaced apart from said first side edge, an exterior surface, an interior surface, and a hollow interior defined by said interior surface; and

a pair of end cap assemblies positioned to locate said fuser belt, said fuser belt being positioned between and supported by said pair of end cap assemblies, each end cap assembly of said pair of end cap assemblies including:

an end cap body; and

a belt support mechanism coupled to said end cap body for supporting said fuser belt and configured to be compliant in a direction perpendicular to a rotational axis of said fuser belt to apply a biasing force to said interior surface of said fuser belt.

2. The fuser assembly of claim 1 , wherein said belt support mechanism includes:

a belt support movably coupled to said end cap body, said belt support having a belt support surface, said belt support being positioned in said hollow interior of said fuser belt; and

a spring that applies a biasing force to said belt support to position said belt support surface in contact with said interior surface of said fuser belt.

3. The fuser assembly of claim 2 , wherein said spring is positioned between said end cap body and said belt support.

4. The fuser assembly of claim 2 , wherein said belt support is compliant in said direction perpendicular to said rotational axis of said fuser belt.

5. The fuser assembly of claim 2 , wherein said belt support is made of a high temperature plastic, and said belt support surface is a smooth surface for contacting said interior surface of said fuser belt.

6. The fuser assembly of claim 1 , wherein each end cap assembly of said pair of end cap assemblies further includes a flange coupled to said end cap body and positioned to engage a corresponding side edge of said fuser belt.

7. The fuser assembly of claim 6 , wherein said flange is formed to be compliant in a direction parallel to said rotational axis of said fuser belt.

8. The fuser assembly of claim 7 , wherein said flange is made of a high temperature plastic that does not include glass fibers, and has a smooth surface for contacting said corresponding side edge of said fuser belt.

9. The fuser assembly of claim 1 , wherein:

each end cap assembly of said pair of end cap assemblies further includes a compliant flange coupled to said end cap body and positioned to engage a corresponding side edge of said fuser belt; and

said belt support mechanism includes:

a belt support movably coupled to said end cap body, said belt support having a belt support surface, said belt support being positioned in said hollow interior of said fuser belt; and

a spring that applies a biasing force to said belt support to position said belt support surface in contact with said interior surface of said fuser belt,

said compliant flange and said belt support being formed as an integral unit.

10. The fuser assembly of claim 1 , wherein:

each end cap assembly of said pair of end cap assemblies further includes a compliant flange coupled to said end cap body and positioned to engage a corresponding side edge of said fuser belt; and

said belt support mechanism includes:

a belt support movably coupled to said end cap body, said belt support having a belt support surface, said belt support being positioned in said hollow interior of said fuser belt; and

a spring that applies a biasing force to said belt support to position said belt support surface in contact with said interior surface of said fuser belt,

said compliant flange and said belt support being formed as discrete components.

11. An electrophotographic imaging apparatus for forming an image on a sheet of print media, comprising:

a media feed section for feeding said sheet of print media along a media feed path;

a laser scanning device configured to produce a scanned light beam;

an image-forming device having a photosensitive body, and configured to use said scanned light beam to form a latent image on said photosensitive body and develop said latent image to form a toner image that is transferred to said sheet of print media; and

a fuser assembly configured to fix said toner image to said sheet of print media, said fuser assembly including:

a fuser belt having a first side edge and a second side edge; and

a pair of end cap assemblies positioned to locate said fuser belt, said fuser belt being positioned between and supported by said pair of end cap assemblies, each end cap assembly of said pair of end cap assemblies including:

an end cap body; and

a belt support mechanism coupled to said end cap body for supporting said fuser belt and configured to be compliant in a direction perpendicular to a rotational axis of said fuser belt to apply a biasing force to said interior surface of said fuser belt.

12. The electrophotographic imaging apparatus of claim 11 , wherein said belt support mechanism includes:

a belt support movably coupled to said end cap body, said belt support having a belt support surface, said belt support being positioned in said hollow interior of said fuser belt; and

a spring that applies a biasing force to said belt support to position said belt support surface in contact with said interior surface of said fuser belt.

13. The electrophotographic imaging apparatus of claim 12 , wherein said spring is positioned between said end cap body and said belt support.

14. The electrophotographic imaging apparatus of claim 12 , wherein said belt support is compliant in said direction perpendicular to said rotational axis of said fuser belt.

15. The electrophotographic imaging apparatus of claim 12 , wherein said belt support is made of a high temperature plastic, and said belt support surface is a smooth surface for contacting said interior surface of said fuser belt.

16. The electrophotographic imaging apparatus of claim 11 , wherein each end cap assembly of said pair of end cap assemblies further includes a flange coupled to said end cap body and positioned to engage a corresponding side edge of said fuser belt.

17. The electrophotographic imaging apparatus of claim 16 , wherein said flange is formed to be compliant in a direction parallel to said rotational axis of said fuser belt.

18. The electrophotographic imaging apparatus of claim 17 , wherein said flange is made of a high temperature plastic that does not include glass fibers, and has a smooth surface for contacting said corresponding side edge of said fuser belt.

19. The electrophotographic imaging apparatus of claim 11 , wherein:

each end cap assembly of said pair of end cap assemblies further includes a compliant flange coupled to said end cap body and positioned to engage a corresponding side edge of said fuser belt; and

said belt support mechanism includes:

a belt support movably coupled to said end cap body, said belt support having a belt support surface, said belt support being positioned in said hollow interior of said fuser belt; and

a spring that applies a biasing force to said belt support to position said belt support surface in contact with said interior surface of said fuser belt,

said compliant flange and said belt support being formed as an integral unit.

20. The electrophotographic imaging apparatus of claim 11 , wherein:

each end cap assembly of said pair of end cap assemblies further includes a compliant flange coupled to said end cap body and positioned to engage a corresponding side edge of said fuser belt; and

said belt support mechanism includes:

a belt support movably coupled to said end cap body, said belt support having a belt support surface, said belt support being positioned in said hollow interior of said fuser belt; and

a spring that applies a biasing force to said belt support to position said belt support surface in contact with said interior surface of said fuser belt,

said compliant flange and said belt support being formed as discrete components.

Assignments (8)