Fuser device and image forming apparatus
AssigneeOki Data Corporation
InventorsRyoji YABUKI, Junichi ITO
Life of this patent
Estimating the term…
Abstract
A fuser device for fusing a developer image on a medium by applying heat includes an endless fuser belt, a belt supporting part that has a contact face shaped in an arc centering on a first central axis and contacts with the inner circumferential face of the fuser belt on the contact face, a driven ring that is disposed on at least one side of the fuser belt in the width direction of the fuser belt, and a ring supporting part that has a contact face shaped in an arc centering on a second central axis and contacts with an inner circumferential face of the driven ring on the contact face, wherein the first central axis is shifted from the second central axis.
Claims19
A fuser device for fusing a developer image on a medium by applying heat, comprising:
- an endless fuser belt,
- a belt supporting part that has a contact face shaped in an arc centering on a first central axis and contacts with the inner circumferential face of the fuser belt on the contact face,
- a driven ring that is disposed on at least one side of the fuser belt in the width direction of the fuser belt, and
- a ring supporting part that has a contact face shaped in an arc centering on a second central axis and contacts with an inner circumferential face of the driven ring on the contact face, wherein
- the first central axis is shifted from the second central axis.
A fuser device for fusing a developer image on a medium by applying heat, comprising:
- an endless fuser belt that is flexible and has a width in a belt axis, the width being determined by a pair of edges in a axis direction (Y) along the belt axis wherein the fuser belt has an inner circumferential face and an outer circumferential face that are opposed in a radial direction perpendicular to the axis direction,
- a pair of belt supporting parts each of which has a first contact face (31a) shaped in an arc centering on a first central axis (A), and the first central axis extending parallel to the axis direction (Y), wherein the first contact face is inserted inside the fuser belt from one of the edges such that the first contact face supports the inner circumferential face of the fuser belt to rotate around the first central axis,
- a driven ring (4) that has a ring shape, wherein the driven ring has an inner radial (R1), an outer radial (R2), an inside face (41) that is determined by a difference between the inner radial and the outer radial in the radial direction, and the inside face is disposed to face one of the edges of the fuser belt,
- a ring supporting part that has a second contact face (33a) shaped in an arc centering on a second central axis, which extends parallel to the first central axis, and the second contact face having a supporting radial (L2) in the radial direction from the second central axis, wherein the supporting radial of the ring supporting part is smaller than the inner radial of the driven ring such that the driven ring rotates around the second central axis as contacting the second contact face of the ring supporting part, wherein
- a gap distance (S), which is defined between the first central axis and the second central axis seen from a view of the belt axis, the inner and outer radials of the driven ring are set such that the inside face (41) of the driven ring is always in contact with the one of the edges of the fuser belt while the fuser belt rotates around the first central axis.
Dependencies are inferred from the claim text.