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Fixing device and image forming device

An image and clamping part technology, applied to the electric recording process using the charge pattern, equipment and instruments using the charge pattern electric recording process, etc., can solve the problems of increased power consumption, heat loss, and time increase of the fixing device. Achieve the effect of reducing power consumption and shortening warm-up time

Active Publication Date: 2019-11-08
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of heating from the cooling period, heat loss occurs because the fixing member passes through the nip before the heat is transferred from the heating member to the recording material
Therefore, problems such as an increase in the time to reach the fixing temperature of the toner (warm-up time) or an increase in the power consumption of the fixing device occur.

Method used

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  • Fixing device and image forming device
  • Fixing device and image forming device
  • Fixing device and image forming device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0026] figure 1 Shown is a schematic diagram of a monochrome printer of an image forming apparatus according to an embodiment of the present invention. The present invention is similarly applicable to known color image forming apparatuses.

[0027] Such as figure 1 As shown, the black and white printer includes a photoreceptor 8 as an image carrier, a charging roller 18 as a charging mechanism, a mirror 20 as an exposure mechanism, a developing device 22 with a developing roller 22a as a developing mechanism, and a transfer device 10 . In addition, the black and white printer also includes a cleaning device 24 having a cleaning blade 24a.

[0028] Between the charging roller 18 and the developing device 22 , the exposure light Lb is irradiated to the exposure portion 26 on the photoreceptor 8 through the mirror 20 and scanned. A paper feed mechanism 4 is arranged at the lower part of the printer, and a registration roller pair 6 is provided in the middle of a paper conveyan...

no. 2 approach

[0059] Figure 5 Shown is an enlarged schematic view of a fixing nip portion of a fixing device according to a second embodiment. exist Figure 5 in, with Figure 4 The same components are assigned the same symbols, and detailed descriptions thereof are omitted.

[0060] The fixing device 12 according to this embodiment is different from the fixing device 12 according to the first embodiment in the shape of the heating member 50 . That is, the heat conduction member 50 dS is inclined or protrudes on the side of the pressure roller 30 from upstream toward the downstream portion in the recording material conveyance direction at the fixing nip SN. Thus, the pressure acting in the fixing nip SN is greater at the outlet than at the nip inlet.

[0061] Image 6 Shown is the pressure profile of the fixing nip. In the figure, the horizontal axis represents the position in the recording material conveyance direction of the fixing nip SN, and the vertical axis represents the surfa...

no. 3 approach

[0071] Figure 10 Shown is an enlarged schematic view of a fixing nip portion of a fixing device according to a third embodiment. exist Figure 10 in, with Figure 4 The same components are assigned the same symbols, and detailed descriptions thereof are omitted.

[0072] Such as Figure 10 As shown, the width of the heat conduction member 50 dW of the fixing device according to the present embodiment in the recording material conveyance direction is larger than that of the fixing nip SN. Then, the heat-resistance layer 50 a is arranged in the thermally conductive member 50 dW at the upstream portion in the recording material conveyance direction from the fixing nip SN. Therefore, the fixing belt 38 can be heated from before the fixing nip SN, and even if the fixing belt 38 moves at a high speed, sufficient heat can be transferred to the recording material in the fixing nip SN. Therefore, while the fixing nip SN is pressurized by the heating member 50, the heat transfer e...

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PUM

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Abstract

In the fixing device and the image forming device of the present invention, the fixing member and the recording material are sandwiched between the heating member and the pressing member to heat, thereby shortening the preheating time or reducing power consumption. The fixing device includes a heating member that generates heat, a fixing member that rotates while in contact with the heating member, and a pressing member that forms a fixing nip with the fixing member and the heating member interposed therebetween. The recording material with an unfixed image is fixed. The heating member has an insulating bottom plate and a resistance heat-generating layer formed on the bottom plate. The resistance heat-generating layer is formed on the upstream side of the center of the fixing nip in the recording material conveyance direction. Since the heating time through the resistance heating layer is extended, more heat can be transferred to the toner, thereby shortening the warm-up time or reducing power consumption.

Description

technical field [0001] The present invention relates to a fixing device and an image forming device including the fixing device. Background technique [0002] In image forming devices such as copiers, printers, and facsimiles, a toner image is formed on an image carrier based on image data, and the toner image is transferred to a recording material such as paper or OHP sheet superior. Then, the recording material carrying the toner image is passed through a fixing device, and the toner image is fixed to the recording material by the action of heat and pressure. [0003] As a fixing device that realizes energy saving, there is a proposal to heat and fix the film. This is a technology that heats thin strips or films by means of resistance heaters that form a resistance heating element on a ceramic or glass substrate. [0004] For example, in the configuration disclosed in Patent Document 1, the recording material is tightly sandwiched by a plate-shaped heating body and a pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20
CPCG03G15/2053G03G2215/2035G03G15/2064
Inventor 荻野尉彦石井贤治瀬户隆藤本一平岸和人泽田宪成吉永洋高木启正长谷岳诚瀬尾洋松阪晋小桥川翔太
Owner RICOH KK
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