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Restricting blade and developing device

A developing device and blade technology, which can be applied to instruments, equipment of electrical recording technology using charge patterns, optics, etc., can solve the problems of stripes and increased thickness of the developer.

Inactive Publication Date: 2011-06-29
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the thickness of the developer increases, thereby causing a problem that streaks appear on the image

Method used

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  • Restricting blade and developing device
  • Restricting blade and developing device
  • Restricting blade and developing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this embodiment, a stainless steel plate with a thickness T of 0.08 mm is used as the metal plate. The difference ΔX of the "distance X (μm)" described above is 75 μm, the "maximum thickness t (μm)" is 600 μm, and the "arithmetic average roughness Ra (μm)" is 0.3 μm. Using these dimensions, ΔX=t / 8. By melting and injecting polyamide elastomer (trade name: hydrazine E40) at a temperature of 200°C to 270°C and then cooling, the coating layer 4c1 is formed on the front end surface and the back surface of the regulating blade 4c at least in the vicinity of the front end surface The polyamide elastomer is formed at a mold temperature of 40°C.

Embodiment 2

[0051] In this embodiment, a stainless steel plate with a thickness T of 0.08 mm is used as the metal plate. The difference ΔX of the “distance X (μm)” described above is 15 μm, the “maximum thickness t (μm)” is 300 μm, and the “arithmetic average roughness Ra (μm)” is 0.5 μm. Using these dimensions, ΔX=t / 20. Here, the clad layer 4c1 is formed in the same manner as in Example 1.

Embodiment 3

[0053] In this embodiment, a stainless steel plate with a thickness T of 0.08 mm is used as the metal plate. The difference ΔX of the "distance X (μm)" as described above is 50 μm, the "maximum thickness t (μm)" is 300 μm, and the "arithmetic mean roughness Ra (μm)" is 0.3 μm. Using these dimensions, ΔX=t / 6. Here, the clad layer 4c1 is formed in the same manner as in Example 1.

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PUM

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Abstract

A restricting blade includes: a metallic plate subjected to punching; a contact surface perpendicular to a thickness direction of the metallic plate, the surface being positioned upstream in a punch direction; an end surface of the metallic plate, formed by the punching, the surface being positioned at the metallic plate upstream in a rotational direction of the developing roller; and a coating layer formed in such a manner as to cover a part of a surface positioned opposite to the contact surface in the thickness direction of the metallic plate and the end surface with a resin or an elastomer.

Description

Technical field [0001] The present invention relates to a restricting blade for adjusting the thickness of a developer of a developing roller and a developing device using the restricting blade. Background technique [0002] As a developing device for supplying a developer to an image carrier, a developing device including a developing roller and a regulating blade for regulating the thickness of the developer of the developing roller is conventionally known. In recent years, a regulating blade obtained by punching a metal plate made of phosphor bronze, stainless steel, etc., has been used to satisfactorily apply triboelectric charge to the developer, thereby reducing the development roller The thickness of the developer. Incidentally, Japanese Patent Laid-Open No. 2002-372858 discloses related technologies. [0003] However, the above-mentioned configuration in the related art has the following problems. [0004] Figure 4A It is a view schematically showing the configuration of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0812
Inventor 县伸一
Owner CANON KK