A heater including a substrate, a first heat generating line provided on the substrate and in a longitudinal direction of the substrate, the first heat generating line being divided into a plurality of heat generating blocks in the longitudinal direction, the plurality of heat generating blocks being controllable independently, and a second heat generating line provided on the substrate and in the longitudinal direction of the substrate, the second heat generating line being divided into a plurality of heat generating blocks in the longitudinal direction, the plurality of heat generating blocks being controllable independently. In the heater, divided positions of the first heat generating line and divided positions of the second heat generating line are different.

A heating paste composition, and a sheet heating element, a heating roller, a heating unit and a heating module, which use the composition, are disclosed. In one aspect, the heating paste composition includes 0.2 parts to 6 parts by weight of carbon nanotube particles, 0.5 parts to 30 parts by weight of graphite particles, 5 parts to 30 parts by weight of a binder mixture, 29 parts to 80 parts by weight of an organic solvent and 0.5 parts to 5 parts by weight of a dispersant, wherein the weights are with respect to 100 parts by weight of the heating paste composition.

A heater and an image forming device are provided that can reduce manufacturing costs and suppress temperature variation within the surface of the heater. The heater according to an embodiment includes: a substrate having a plate shape and extending in a first direction; a first heating element provided on one surface side of the substrate and extending in the first direction; a first wiring provided on the one surface side of the substrate and overlapping an end portion of the first heating element in the first direction; a second heating element spaced apart from the first heating element in a second direction perpendicular to the first direction on the one surface side of the substrate, and extending in the first direction; and a second wiring provided on the one surface side of the substrate and overlapping an end portion of the second heating element in the first direction. In the second direction, a first portion where the first heating element and the first wiring overlap is adjacent to a second portion where the second heating element and the second wiring overlap. In the first direction, the first portion is spaced apart from the second portion. In the second direction, the first portion faces the second heating element. In the first direction, the first heating element and the second heating element are not in an inclusive relationship with each other.

Whether a first heating region is actually a passing heating region or a non-passing heating region which a recording material does not pass through, is detected by the temperature detected by a temperature detecting portion, based on a difference between a detected temperature by a temperature detecting portion in a reference heating region, which is specified to a heating region including a conveyance reference position of the recording material, and a detected temperature in a first heating region which does not include the conveyance reference position and is specified to a passing heating region which the recording material passing through. In a case where it is determined that the first heating region is the non-passing heating region, a prevention control, to prevent overheat of the first heating region is performed in the heating processing of the recording material that passes the nip portion after the determination.

The present invention provides a heater capable of prohibiting failures of a substrate and a heat resistor. The heater of the present invention includes a substrate in a longitudinal shape, a heat resistor formed on the substrate, and an electrode for resistor formed on the substrate and connected to the heat resistor. The heat resistor includes a first elongated portion, and the first elongated portion extends along a long side direction of the substrate and is disposed in a side in a first short side direction, which is one of short side directions of the substrate. A ratio of a distance between the first elongated portion and an edge of the substrate on the first short side direction, to a thickness of the substrate is more than 0 and less than 1.75.

Provided is a substrate transport roller (2a) capable of ensuring a broad temperature-control region on a substrate, without reducing substrate transport quality. This substrate transport roller (2a) is provided in a film-forming device (1) for executing a film-forming process on the surface of a film substrate (W), transports the film substrate (W) by rotating around a center axis, and is equipped with: a center-section segment (13a) positioned in the center section in the axial direction extending along the center axis, and having a first outer-circumferential surface; end-section segments (12a, 12b) positioned on both sides on the outside in the axial direction of the center-section segment (13a), and each having a second outer-circumferential surface which contacts the substrate (W) and has a larger diameter than that of the first outer-circumferential surface; a center-section-rising-falling-temperature-medium mechanism for changing the temperature of the center-section segment (13a); and a both-end-section-rising-falling-temperature mechanism for changing the temperature of each of the end-section segments (12a, 12b) independently from the center-section segment (13a).

A heating device includes a heating roller having a resistance heat-generating layer that generates heat by passage of a current through the resistance heat-generating layer, a pressure rotating body that rotates in such a manner as to press a sheet-shaped heating target that is an object to be subjected to a heating treatment against an outer peripheral surface of the heating roller and in such a manner as to cause the heating target to pass through the outer peripheral surface of the heating roller, and an auxiliary heating unit that supplementarily heats at least an axial end region included in a heat-generating region in which heat is generated by the resistance heat-generating layer of the heating roller.

Whether a first heating region is actually a passing heating region or a non-passing heating region which a recording material does not pass through, is detected by the temperature detected by a temperature detecting portion, based on a difference between a detected temperature by a temperature detecting portion in a reference heating region, which is specified to a heating region including a conveyance reference position of the recording material, and a detected temperature in a first heating region which does not include the conveyance reference position and is specified to a passing heating region which the recording material passing through. In a case where it is determined that the first heating region is the non-passing heating region, a prevention control, to prevent overheat of the first heating region is performed in the heating processing of the recording material that passes the nip portion after the determination.

In an image heating device having a plurality of heating blocks which are controllable independently in a longitudinal direction of a heater, an increase of the size of the heater can be suppressed, and temperatures of a plurality of heating block can be detected. The heater has a first temperature sensor corresponding to a first heating block, a second temperature sensor corresponding to a second heating block, a first electric conductor electrically coupled to the first temperature sensor, a second electric conductor electrically coupled to the second temperature sensor, and a common electric conductor electrically coupled to the first and second temperature sensors.

In an image heating device having a plurality of heating blocks which are controllable independently in a longitudinal direction of a heater, an increase of the size of the heater can be suppressed, and temperatures of a plurality of heating block can be detected. The heater has a first temperature sensor corresponding to a first heating block, a second temperature sensor corresponding to a second heating block, a first electric conductor electrically coupled to the first temperature sensor, a second electric conductor electrically coupled to the second temperature sensor, and a common electric conductor electrically coupled to the first and second temperature sensors.