Heater and fixing device and drying device equipped with the same

Abstract

This heater is provided with: a long base section (11); a resistance heating wiring section (15) formed on the surface of the base section (11) or inside the base section (11), and formed in a state of electrical insulation from said base section, said resistance heating wiring section (15) having multiple parallel wires that electrically heat; and at least two power supply terminal sections (17) that, to supply power to the resistance heating wiring section (15), electrically connect one terminal section (17) and the other terminal section (17) via the resistance heating wiring section (15). The resistance heating wiring section (15) contains a material with a temperature coefficient of resistance of between 500 and 4,400 ppm / °C, and the parallel wires contain a sloping rectangular pattern.

Description

technical field

[0001] The present invention relates to an elongated heater having a resistive heating wiring portion that generates heat when energized, and a fixing device and a drying device including the heater. Background technique

[0002] As a heating member for heat treatment, a stainless steel heater, a ceramic heater, etc. having a resistance heating wiring portion are known. Furthermore, an apparatus including such a heater is used in a wide range of applications, and can perform stable heat treatment at a desired temperature. For example, in order to form an image on the surface of a recording medium such as paper or film using an image forming apparatus such as an electrophotographic printing machine or a copying machine, an elongated ceramic heater is arranged in the image forming apparatus to make the toner, Ink and other fixing. A specific image forming method is as follows: a recording medium having an unfixed toner image on its surface is supplied between...

Examples

Embodiment 1

[0239] (1) Manufacture of stainless steel heater

[0240] I made it with the following points Figure 40 The stainless steel heater 1A is shown.

[0241] After smoothing the surface of the substrate (length 270mm, width 24mm and thickness 0.6mm) made of SUS430, the composition was SiO 2 -Al 2 o 3 - The crystallized glass forming material of RO was coated on the entire surface of the substrate so that the thickness after the drying treatment was 100 μm. Next, the coating film was fired at 850° C. to obtain an insulating layer made of crystallized glass with a film thickness of 85 μm.

[0242] Afterwards, using a paste that does not contain lead, cadmium, and nickel but contains powder composed of silver-palladium alloy (the temperature coefficient of resistance is 1500ppm / °C), the surface of the insulating layer 13 is printed with materials including Figure 40 Including the inclined rectangular pattern of the shown resistance heating wiring portion 15 , a loop-shaped patt...

Embodiment 2

[0251] As the paste for constituting the resistance heating wiring portion 15, a paste containing powder composed of silver-palladium alloy (temperature coefficient of resistance: 1000ppm / °C) is used to form a paste having Figure 44 The resistance heating wiring part 15 of the shown pattern was manufactured in the same manner as in Example 1 except for this. Figure 44 The shown stainless steel heater 1A was evaluated in the same manner as in Example 1.

[0252] Express the experimental results for evaluating E1 in Figure 45 middle. according to Figure 45 , when the radiator 3A is in contact with the position (P) and the position (R) in the stainless steel heater 1A, the temperature at each position is reduced by about 30°C to 40°C, and when the radiator 3A is in contact with the position (Q) , the temperature at the position (P) and the position (R) increased by about 60°C to 70°C.

Embodiment 3

[0260] (1) Manufacture of stainless steel heater

[0261] We made with the following points Figure 51 The stainless steel heater 1B is shown.

[0262] After smoothing the surface of the substrate (length 270mm, width 24mm and thickness 0.6mm) made of SUS430, the composition was SiO 2 -Al 2 o 3 - The crystallized glass forming material of RO was coated on the entire surface of the substrate so that the thickness after the drying treatment was 39 μm. Next, the coating film was fired at 850° C. to form a crystallized glass thin film with a film thickness of 25 μm. The coating and firing treatments were repeated twice each to obtain an insulating layer with a film thickness of 75 μm.

[0263] Afterwards, using a paste containing powder composed of silver-palladium alloy (the temperature coefficient of resistance is 1500ppm / ℃), printed on the surface of the insulating layer, including Figure 51 Including the inclined rectangular pattern of the shown resistance heating wirin...

technical field

[0001] The present invention relates to an elongated heater having a resistive heating wiring portion that generates heat when energized, and a fixing device and a drying device including the heater. Background technique

[0002] As a heating member for heat treatment, a stainless steel heater, a ceramic heater, etc. having a resistance heating wiring portion are known. Furthermore, an apparatus including such a heater is used in a wide range of applications, and can perform stable heat treatment at a desired temperature. For example, in order to form an image on the surface of a recording medium such as paper or film using an image forming apparatus such as an electrophotographic printing machine or a copying machine, an elongated ceramic heater is arranged in the image forming apparatus to make the toner, Ink and other fixing. A specific image forming method is as follows: a recording medium having an unfixed toner image on its surface is supplied between...

Examples

Embodiment 1

[0239] (1) Manufacture of stainless steel heater

[0240] I made it with the following points Figure 40 The stainless steel heater 1A is shown.

[0241] After smoothing the surface of the substrate (length 270mm, width 24mm and thickness 0.6mm) made of SUS430, the composition was SiO 2 -Al 2 o 3 - The crystallized glass forming material of RO was coated on the entire surface of the substrate so that the thickness after the drying treatment was 100 μm. Next, the coating film was fired at 850° C. to obtain an insulating layer made of crystallized glass with a film thickness of 85 μm.

[0242] Afterwards, using a paste that does not contain lead, cadmium, and nickel but contains powder composed of silver-palladium alloy (the temperature coefficient of resistance is 1500ppm / °C), the surface of the insulating layer 13 is printed with materials including Figure 40 Including the inclined rectangular pattern of the shown resistance heating wiring portion 15 , a loop-shaped patt...

Embodiment 2

[0251] As the paste for constituting the resistance heating wiring portion 15, a paste containing powder composed of silver-palladium alloy (temperature coefficient of resistance: 1000ppm / °C) is used to form a paste having Figure 44 The resistance heating wiring part 15 of the shown pattern was manufactured in the same manner as in Example 1 except for this. Figure 44 The shown stainless steel heater 1A was evaluated in the same manner as in Example 1.

[0252] Express the experimental results for evaluating E1 in Figure 45 middle. according to Figure 45 , when the radiator 3A is in contact with the position (P) and the position (R) in the stainless steel heater 1A, the temperature at each position is reduced by about 30°C to 40°C, and when the radiator 3A is in contact with the position (Q) , the temperature at the position (P) and the position (R) increased by about 60°C to 70°C.

Embodiment 3

[0260] (1) Manufacture of stainless steel heater

[0261] We made with the following points Figure 51 The stainless steel heater 1B is shown.

[0262] After smoothing the surface of the substrate (length 270mm, width 24mm and thickness 0.6mm) made of SUS430, the composition was SiO 2 -Al 2 o 3 - The crystallized glass forming material of RO was coated on the entire surface of the substrate so that the thickness after the drying treatment was 39 μm. Next, the coating film was fired at 850° C. to form a crystallized glass thin film with a film thickness of 25 μm. The coating and firing treatments were repeated twice each to obtain an insulating layer with a film thickness of 75 μm.

[0263] Afterwards, using a paste containing powder composed of silver-palladium alloy (the temperature coefficient of resistance is 1500ppm / ℃), printed on the surface of the insulating layer, including Figure 51 Including the inclined rectangular pattern of the shown resistance heating wirin...

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