Fuser member including an electrically conductive polymer layer, a resistive layer, an electrically conductive layer, and current supply and return rolls
View Patent ↗A fuser member adapted to fuse toner onto the surface of a recording medium as the recording medium passes a nip area of the fuser member comprises a electrically conductive polymer layer, a resistive layer, and an electrically conductive layer. The fuser member further comprises a current supply roll and a current return roll, wherein the current supply roll and the current return roll are configured to provide current flow through the electrically conductive polymer layer and the resistive layer to generate fusing heat at the nip area.
1. A fuser member adapted to fuse toner on the surface of a recording medium passing a nip area of the fuser member, comprising:
an electrically conductive polymer layer;
a resistive layer;
an electrically conductive layer; and
a current supply roll and a current return roll, the current supply roll and current return roll being operable to provide current flow through the electrically conductive polymer layer and the resistive layer in order to generate fusing heat at the nip area.
2. A fuser member according to claim 1 wherein the electrically conductive polymer layer comprises a polyimide, a polyamideimide, a polyetherimide, or combinations thereof.
3. A fuser member according to claim 1 wherein the current supply roll and the current return roll each comprise an electrically conductive shaft.
4. A fuser member according to claim 3 wherein the electrically conductive shaft comprises a metal, ceramic, or conductive polymer material.
5. A fuser member according to claim 3 wherein each electrically conductive shaft is provided with a metal coating.
6. A fuser member according to claim 5 wherein the metal coating comprises nickel.
7. A fuser member according to claim 5 wherein the metal coating comprises gold.
8. A fuser member according to claim 3 wherein each electrically conductive shaft is provided with an electrically conductive polymer coating.
9. A fuser member according to claim 8 wherein the electrically conductive polymer coating comprises a conductive silicone foam coating.
10. A fuser member according to claim 9 wherein each electrically conductive shaft is provided with a conductive filler coating on the silicone foam coating.
11. A fuser member according to claim 10 wherein the conductive filler comprises conductive carbon black.
12. A fuser member according to claim 9 wherein each electrically conductive shaft is provided with a metallized coating on the silicone foam coating.
13. A fuser member according to claim 3 wherein each electrically conductive shaft comprises rubber.
14. A fuser member according to claim 13 wherein each electrically conductive shaft further includes a conductive filler coating.
15. A fuser member according to claim 14 wherein the conductive filler coating comprises carbon black.
16. A fuser unit adapted to fuse toner on the surface of a recording medium comprising:
a fuser member comprising an electrically conductive polymer layer, a resistive layer, an electrically conductive layer, a current supply roll and a current return roll, the current supply roll and current roll being operable to provide current flow through the electrically conductive polymer layer and the resistive layer in order to generate fusing heat at a nip area; and
a backup roll adjacent the nip area.
17. A fuser unit according to claim 16 wherein said fuser member further comprises a primer layer, and a release layer.
18. A fuser unit according to claim 16 wherein the electrically conductive polymer layer comprises a polyimide, a polyamideimide, a polyetherimide, or combinations thereof.