Fixing device and fixing temperature control method of fixing device
First Claim
1. A fixing device comprising:
- an endless rotating body;
a plurality of heat-generating resistors that heats a medium, each heat-generating resistor being parallelogram pattern and being parallel, formed in a perpendicular direction to a transporting direction of the medium, inclined from the transporting direction to a direction of a predetermined angle, and divided by a predetermined length, and being disposed so as to come into contact with an inner side of the endless rotating body;
a plurality of switches, each of the switch being connected to each heat-generating resistor, that switch individual conduction of these switches connected to heat-generating resistors corresponding to a position through which the medium passes, the plurality of heat-generating resistors being able to be thinned out by controlling of each of the switch; and
a pressing roller that forms a nip by performing pressing and contact at a position of the plurality of heat-generating resistors, and for nipping and carrying the medium in the transporting direction.
1 Assignment
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Accused Products
Abstract
According to one embodiment, a fixing device includes determination means for determining the size of an image forming area of a medium, heating means for including an endless rotating body, plural heat-generating members which are formed in a perpendicular direction to a transporting direction, inclined by a predetermined angle, and divided by a predetermined length, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and nipping and carrying the medium in the transporting direction along with the heating means, and heating control means for controlling the switching unit to select and conduct heat-generating members and controlling the heating means to heat the medium.
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Citations
18 Claims
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1. A fixing device comprising:
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an endless rotating body; a plurality of heat-generating resistors that heats a medium, each heat-generating resistor being parallelogram pattern and being parallel, formed in a perpendicular direction to a transporting direction of the medium, inclined from the transporting direction to a direction of a predetermined angle, and divided by a predetermined length, and being disposed so as to come into contact with an inner side of the endless rotating body; a plurality of switches, each of the switch being connected to each heat-generating resistor, that switch individual conduction of these switches connected to heat-generating resistors corresponding to a position through which the medium passes, the plurality of heat-generating resistors being able to be thinned out by controlling of each of the switch; and a pressing roller that forms a nip by performing pressing and contact at a position of the plurality of heat-generating resistors, and for nipping and carrying the medium in the transporting direction. - View Dependent Claims (2, 3, 4)
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5. A printing device comprising:
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an endless belt; a plurality of heat-generating resistors that heat a medium, each heat-generating resistor being parallelogram pattern and being parallel, formed in a perpendicular direction to a transporting direction of the medium, inclined from the transporting direction to a direction of a predetermined angle, and divided by a predetermined length, and being disposed so as to come into contact with an inner side of the endless belt; a plurality of switches, each of the switches being connected to each heat-generating resistor, that switch individual conduction of these switches connected to heat-generating resistors corresponding to a position through which the medium passes; a pressing roller that forms a nip by performing pressing and contact at a position of the plurality of heat-generating resistors, and for nipping and carrying 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 that controls for the plurality of switches connected to the plurality of heat-generating resistors, the plurality of heat-generating resistors being able to be thinned out by the controller that controls each of the switch. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A fixing temperature control method of a fixing device which includes a plurality of heat-generating resistors, a plurality of switches, and a pressing roller and fixes a toner image on the medium by heating a plurality of heat-generating resistors that heat a medium, each heat-generating resistor being parallelogram pattern and being formed in a perpendicular direction to a transporting direction of the medium, being inclined from the transporting direction to a direction of a predetermined angle, and being divided by a predetermined length, individually switching conduction of these heat-generating resistors, the plurality of switch, each of the switches being connected to each heat-generation resistor, the plurality of heat-generating resistors being able to be thinned out by controlling each of the switch, the method comprising:
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determining the size of the medium; and controlling the plurality of switch to select and conduct these switches connected to heat-generating resistors corresponding to a position through which the medium passes, among the plurality of heat-generating resistors and controlling heating of the heat-generating resistors. - View Dependent Claims (16, 17, 18)
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Specification