Heat roller, fixing apparatus
View Patent ↗A fixing apparatus according to the invention is provided with a heating roller 1 . The heating roller 1 includes an elastic layer 1 b formed around a shaft member 1 a , a conductive layer 1 e formed outside the elastic layer 1 b , and at least one impedance-adjusting layer 1 d interposed between the elastic layer 1 b and the conductive layer 1 e . The conductive layer 1 e includes conductive paste containing metal particles.
1. A heating roller comprising:
a shaft member;
a first elastic layer provided on a longitudinal periphery of the shaft member;
a metal layer provided outside the first elastic layer and configured to adjust an impedance of the heating roller;
a conductive layer which is provided outside the metal layer and which is applied with a magnetic field from outside of the heating roller and generates heat; and
a resin layer provided between the metal layer and the conductive layer and providing electrical isolation between the metal layer and the conductive layer.
2. The heating roller according to claim 1 , wherein the conductive layer is formed of conductive paste which is a mixture of resin paste and metal particles.
3. The heating roller according to claim 2 , wherein the metal particles include particles of at least one selected from the group consisting of gold, silver, platinum, copper, aluminum, nickel, stainless steel, a compound of aluminum and stainless steel, and zinc.
4. The heating roller according to claim 2 , wherein the metal layer is formed of conductive paste which is a mixture of resin paste and metal particles.
5. The heating roller according to claim 4 , wherein the metal particles include particles of at least one selected from the group consisting of gold, silver, platinum, copper, aluminum, nickel, stainless steel, a compound of aluminum and stainless steel, and zinc.
6. The heating roller according to claim 1 , further comprising
at least one heat-resistive resin layer provided between the first elastic layer and the metal layer.
7. The heating roller according to claim 1 , wherein
the metal layer includes a plurality of metal layers and heat-resistive resin layers provided between each pair of adjacent ones of the plurality of metal layers.
8. The heating roller according to claim 7 , wherein the plurality of metal layers are each divided in a circumferential direction of the heating roller.
9. The heating roller according to claim 1 , wherein at least one of the conductive layer and the metal layer has an axially extending groove.
10. The heating roller according to claim 1 , wherein at least one of the conductive layer and the metal layer has a groove extending at a predetermined angle with respect to an axis.
11. A fixing apparatus comprising:
a heating member including a first elastic layer formed around a shaft member, and a conductive layer formed outside the first elastic layer and containing metal particles, and at least one impedance-adjusting layer interposed between the first elastic layer and the conductive layer;
a pressure member pressed against the heating member by a pressurizing mechanism; and
a heating mechanism including an exciting coil which applies a magnetic field to the conductive layer to generate heat, using induction heating.
12. The fixing apparatus according to claim 10 , wherein
the conductive layer is formed of conductive paste which is a mixture of resin paste and metal particles.
13. The fixing apparatus according to claim 12 , wherein the metal particles include particles of at least one selected from the group consisting of gold, silver, platinum, copper, aluminum, nickel, stainless steel, a compound of aluminum and stainless steel, and zinc.
14. The fixing apparatus according to claim 12 , wherein the at least one impedance-adjusting layer is formed of conductive paste which is a mixture of resin paste and the metal particles.
15. The fixing apparatus according to claim 14 , wherein the metal particles include particles of at least one selected from the group consisting of gold, silver, platinum, copper, aluminum, nickel, stainless steel, a compound of aluminum and stainless steel, and zinc.
16. The heating roller according to claim 11 , further comprising
at least one heat-resistive layer provided between the first elastic layer and the metal layer.
17. The fixing apparatus according to claim 11 , wherein at least one of the conductive layer and the at least one impedance-adjusting layer has an axially extending groove.
18. The fixing apparatus according to claim 11 , wherein at least one of the conductive layer and the at least one impedance adjusting layer has a groove extending at a predetermined angle with respect to an axis.