US 2019/0317436 A1 · FIXING DEVICE AND FIXING TEMPERATURE CONTROL METHOD OF FIXING DEVICE

Abstract

According to one embodiment, a fixing device includes an endless rotating body; a plurality of heat-generating members that heats a medium, each heat-generating member being inclined from the transporting direction to a direction of a predetermined angle, and divided by a predetermined length, the plurality of heat-generating members being disposed on an inner side of the endless rotating body; a plurality of driving circuits, each of the plurality of driving circuits being connected to a corresponding heat-generating member of the plurality of heat-generating members, each of the plurality of driving circuits configured to control individual conduction thereof, each of the plurality of heat-generating members configured to selectively generate a discrete amount of heat corresponding to a position through which the medium passes; and a pressing roller that forms a nip with the plurality of heat-generating members, and configured to nip the medium therebetween and carry the medium in the transporting direction.

Claims20

Dependent claims

A fixing device comprising:

an endless rotating body;
a plurality of heat-generating members that heats a medium, each heat-generating member being inclined from the transporting direction to a direction of a predetermined angle, and divided by a predetermined length, the plurality of heat-generating members being disposed on an inner side of the endless rotating body;
a plurality of driving circuits, each of the plurality of driving circuits being connected to a corresponding heat-generating member of the plurality of heat-generating members, each of the plurality of driving circuits configured to control individual conduction thereof, each of the plurality of heat-generating members configured to selectively generate a discrete amount of heat corresponding to a position through which the medium passes;
and
a pressing roller that forms a nip with the plurality of heat-generating members, and configured to nip the medium therebetween and carry the medium in the transporting direction.

2 more elements

A printing device comprising:

an endless belt;
a plurality of heat-generating members that heat a medium, each heat-generating member being inclined from the transporting direction to a direction of a predetermined angle, and divided by a predetermined length, the plurality of heat-generating members being disposed on an inner side of the endless belt;
a plurality of driving circuits, each of the plurality of driving circuits being connected to a corresponding heat-generating member of the plurality of heat-generating members, each of the plurality of driving circuits configured to control individual conduction thereof, each of the plurality of heat-generating members configured to selectively generate a discrete amount of heat corresponding to a position through which the medium passes;
a pressing roller that forms a nip with the plurality of heat-generating members, and configured to nip the medium therebetween and carry the medium in the transporting direction;
and
a controller that determines the size of a medium on which a toner image is formed, the controller selects one or more of the plurality of driving circuits connected to the corresponding plurality of heat-generating members to generate heat.

3 more elements

A method of increasing thermal efficiency in a fixing method in a first fixing device compared to a second fixing device containing one heating element, the first fixing device comprising a plurality of heat-generating members, a plurality of driving circuits, and a pressing roller and fixes a toner image on the medium by heating a plurality of heat-generating members that heat a medium, each heat-generating member being inclined from the transporting direction to a direction of a predetermined by a predetermined angle and being divided by a predetermined length, each of the plurality of driving circuits being connected to a corresponding heat-generating member of the plurality of heat-generating members, each of the plurality of driving circuits configured to control individual conduction thereof, the method comprising:

determining the size of the medium;
and
controlling the plurality of driving circuits to selectively conduct one or more of the plurality of driving circuits connected to their corresponding heat-generating members corresponding to a position through which the medium passes, among the plurality of heat-generating members and thereby controlling heating of the plurality of heat-generating members.

Dependencies are inferred from the claim text.

Fixing device and fixing temperature control method of fixing device

Life of this patent

Fixing device and fixing temperature control method of fixing device

Life of this patent

Abstract

Claims20