Fusing device
AssigneeSamsung Electronics Co., Ltd.
InventorWon Hee SOHN
Life of this patent
Estimating the term…
Abstract
Disclosed is a fusing device and more particularly, is a fusing device having an improved configuration to apply voltage to a press roller to achieve an enhanced image quality. The fusing device includes a first roller configured to produce heat and a second roller configured to apply pressure on the first roller. The first roller can include a shaft configured to rotate and having a conductive material, a first member configured to surround the shaft and having a non-conductive and elastic material, a second member configured to surround the first member and having a conductive film, and a third member having a conductive material and configured to electrically connect the shaft and the second member.
Claims20
A fusing device, comprising:
- a heat roller configured to produce heat;
- a press roller configured to apply pressure on the heat roller, the press roller having a shaft about which the press roller is configured to rotate, an elastic member surrounding the shaft and a film member surrounding the elastic member, the shaft and the film member each being electrically conductive, the elastic member being electrically non-conductive;
- and
- a connecting member that is electrically conductive, the connecting member being configured to electrically connect the shaft and the film member.
A fusing device, comprising:
- a heat roller configured to produce heat;
- and
- a press roller configured to apply pressure on the heat roller, the press roller having a shaft about which the press roller is configured to rotate, an elastic member surrounding the shaft and a film member surrounding the elastic member, the shaft and the film member each being electrically conductive, the elastic member being electrically non-conductive,
- wherein the film member includes a main portion surrounding an outer peripheral surface of the elastic member and an extension portion that extends radially from the outer peripheral surface to the shaft and that thereby contacts the shaft.
A fusing device for use in an image forming apparatus to fix toner on a printing medium, comprising:
- a cylindrical roller rotatable about an electrically conductive rotational shaft, the cylindrical roller including an electrically conductive outer layer that defines an outer peripheral cylindrical surface of the cylindrical roller configured to contact the print medium, the cylindrical roller further including at least one intermediate layer provided between the shaft and the electrically conductive outer layer, the at least one intermediate layer being electrically non-conductive,
- wherein a portion of the electrically conductive outer layer extends radially from the outer peripheral surface toward the electrically conductive rotational shaft so as to define an electrical connection surface extending, at an axial end of the cylindrical roller, substantially non-parallel to the electrically conductive rotational shaft, the electrical connection surface being electrically connected to the electrically conductive rotational shaft.
Dependencies are inferred from the claim text.