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Image-forming apparatus

An image and image fixing technology, which is applied in the fields of electrical recording technology using charge graphics, equipment for using electrical recording technology using charge graphics, and electrical recording technology, and can solve the problems of narrowing the low temperature range of fixing, developer fusion, blocking, etc. problem, to achieve the effect of superior preservation

Inactive Publication Date: 2009-09-09
OKI DATA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the developer disclosed in the above-mentioned Patent Document 1, since a low-molecular-weight resin is used as a binder, the developer develops during storage. There is a problem that the imaging agent itself is fused and a so-called blocking phenomenon occurs
In addition, in order to prevent such clogging, if a high molecular weight resin is used as a binder, there is a problem that the range of low temperature that is good for fixing will be narrowed

Method used

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Examples

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Embodiment approach 1

[0020] A first embodiment of the present invention will be described below with reference to the drawings. First, the configuration of main parts and the image forming operation of the image forming apparatus of the first embodiment will be described, and then the developer included in the image forming apparatus of the first embodiment will be described.

[0021] figure 1 is a schematic configuration diagram showing a configuration example of a printer as an image forming apparatus of the present invention. The printer 100 is configured as, for example, a color electrophotographic printer, and includes a paper feed cassette 22, image forming units A to D as an image forming unit, a transfer unit u1 as a fixing unit, and a fixing unit E as a fixing unit. Each of the above-mentioned parts includes transport rollers 15c to 15f and 15h to 15x for transporting paper 14 as a medium, and movable paper travel guides 19a and 19b.

[0022] The inside of the paper feeding cassette 22 ...

Embodiment approach 2

[0088] In the printer of the second embodiment, the fixing unit E having the pressure belt 12 in the first embodiment is replaced by the fixing unit F having the pressure roller 36 . Therefore, the NIP width is smaller than that of the fixing unit E section in the first embodiment. In the printer of the second embodiment, except for the fixing unit F, its configuration and image forming operation are the same as those of the first embodiment, so description thereof will be omitted here.

[0089] Such as Figure 9 As shown, the fixing unit F has a fixing roller 35 as a fixing member driven by a fixing motor, which is a driving part for fixing not shown in the figure; A pressure roller 36 that rotates in conjunction.

[0090] The fixing roller 35 is formed by coating an elastic material such as silicon rubber (silicone gum) on a mandrel such as iron or aluminum, and the surface of the elastic material is coated with a fluorine-based resin, and the adhesion of the developer can...

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PUM

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Abstract

An image forming apparatus is supplied capable of providing a good temperature range during the fixing process and good preserving condition for the developer. In the image forming apparatus, an image forming section forms an image onto medium by using developer; and a fixing section has a fixing member which fixes the image onto medium at a predetermined temperature and has a pressing member which is in contact with and presses the fixing member by a predetermined pressure amount, and fixes the image formed by the image forming section onto the medium while conveying the medium at a predetermined speed, wherein the developer contains binder including crystalline resin and amorphous resin, and the endothermic peak temperature difference between crystalline resin and amorphous resin is from 3 DEG C to 9 DEG C.

Description

technical field [0001] The present invention relates to an image forming apparatus. Background technique [0002] In order to realize high-speed printing of color images, there have been image forming apparatuses that use a developer containing a low-molecular-weight resin as a binder and various release agents with different melting points. An image forming apparatus having the developer in the above combination can expand the temperature range for good fixing in the fixing process. (eg, Patent Document 1). [0003] [Patent Document 1] Japanese Patent Laid-Open Publication No. 2006-47332 [0004] However, in the developer disclosed in Patent Document 1, since a low-molecular-weight resin is used as a binder, the developer itself is fused when the developer is stored, and so-called clogging ( blocking) phenomenon. In addition, in order to prevent such a blocking phenomenon, if a high-molecular-weight resin is used as a binder, there is a problem that a low-temperature ra...

Claims

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Application Information

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IPC IPC(8): G03G9/087G03G15/20G03G15/01
CPCG03G15/2064
Inventor 松本隼人
Owner OKI DATA CORP