JP2009058895A5 - - Google Patents
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- Publication number
- JP2009058895A5 JP2009058895A5 JP2007227992A JP2007227992A JP2009058895A5 JP 2009058895 A5 JP2009058895 A5 JP 2009058895A5 JP 2007227992 A JP2007227992 A JP 2007227992A JP 2007227992 A JP2007227992 A JP 2007227992A JP 2009058895 A5 JP2009058895 A5 JP 2009058895A5
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing device
- carrying member
- particle size
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002245 particle Substances 0.000 claims 7
- 239000000969 carrier Substances 0.000 claims 4
- 230000001105 regulatory Effects 0.000 claims 4
- 238000000034 method Methods 0.000 claims 3
Claims (7)
現像剤を収容する現像容器と、
前記現像容器に収容された現像剤を前記現像剤担持体に供給する現像剤供給手段と、
前記現像剤担持体に担持された現像剤の量を規制する現像剤量規制手段と、
を備え、
前記現像剤担持体が被現像体に接触するように設けられ、前記被現像体を現像剤で現像する現像装置において、
前記現像容器内に収容され、体積平均粒径が、４．０μｍ以上６．２μｍ以下であり、かつ、平均円形度が、０．９６５以上である第１現像剤と、
現像装置が未使用の状態で、前記現像剤担持体の表面及び前記現像剤供給手段の表面に予め塗布されている第２現像剤と、
を備え、
前記第１現像剤の体積平均粒径をＲ１、前記第２現像剤の体積平均粒径をＲ２とした場合に、Ｒ１とＲ２との関係が、
１．０＜Ｒ２／Ｒ１≦１．５
を満たし、
前記第１現像剤の体積粒度分布の半値幅をＨ１とし、前記第２現像剤の体積粒度分布の半値幅をＨ２とした場合に、Ｈ１とＨ２との関係が、
１．０＜Ｈ２／Ｈ１≦２．０
を満たすことを特徴とする現像装置。 A developer carrying member carrying the developer;
A developer container containing a developer;
Developer supply means for supplying the developer contained in the developer container to the developer carrier;
Developer amount regulating means for regulating the amount of developer carried on the developer carrying member;
With
In the developing device in which the developer carrying member is provided so as to come into contact with the developing member, and the developing member is developed with the developer,
A first developer contained in the developer container, having a volume average particle size of 4.0 μm or more and 6.2 μm or less, and an average circularity of 0.965 or more;
A second developer pre-applied to the surface of the developer carrier and the surface of the developer supply means in a state where the developing device is not used;
With
When the volume average particle size of the first developer is R1, and the volume average particle size of the second developer is R2, the relationship between R1 and R2 is
1.0 <R2 / R1 ≦ 1.5
The filling,
When the half width of the volume particle size distribution of the first developer is H1, and the half width of the volume particle size distribution of the second developer is H2, the relationship between H1 and H2 is
1.0 <H2 / H1 ≦ 2.0
A developing device characterized by satisfying the above.
Ｒ１とＲ２との関係が、
１．１≦Ｒ２／Ｒ１≦１．５
を満たすことを特徴とする請求項１又は２に記載の現像装置。 The arithmetic average roughness Ra of the surface of the developer carrying member is 0.04 times or less with respect to the volume average particle diameter R1 of the first developer,
The relationship between R1 and R2 is
1.1 ≦ R2 / R1 ≦ 1.5
The developing device according to claim 1, wherein:
前記像担持体に現像作用を行う請求項１乃至３のいずれか１項に記載の現像装置と、
を備えることを特徴とする画像形成装置。 An image carrier;
The developing device according to any one of claims 1 to 3, which performs a developing action on the image carrier;
An image forming apparatus comprising:
前記現像剤量規制手段に電圧を印加する第２電圧印加手段と、
を備え、
前記第１電圧印加手段により前記現像剤担持体に印加される印加電圧をＶａとし、前記第２電圧印加手段により前記現像剤量規制手段に印加される印加電圧をＶｂとした場合に、ＶａとＶｂとの関係が、
Ｖｂ×Ｖａ＞０、かつ、｜Ｖｂ｜＞｜Ｖａ｜
を満たすことを特徴とする請求項５又は６に記載の画像形成装置。 First voltage applying means for applying a voltage to the developer carrying member;
Second voltage applying means for applying a voltage to the developer amount regulating means;
With
When the applied voltage applied to the developer carrying member by the first voltage applying unit is Va and the applied voltage applied to the developer amount regulating unit by the second voltage applying unit is Vb, Va is The relationship with Vb is
Vb × Va> 0 and | Vb |> | Va |
The image forming apparatus according to claim 5, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007227992A JP5053764B2 (en) | 2007-09-03 | 2007-09-03 | Developing device, process cartridge, and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007227992A JP5053764B2 (en) | 2007-09-03 | 2007-09-03 | Developing device, process cartridge, and image forming apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2009058895A JP2009058895A (en) | 2009-03-19 |
| JP2009058895A5 true JP2009058895A5 (en) | 2010-10-21 |
| JP5053764B2 JP5053764B2 (en) | 2012-10-17 |
Family
ID=40554652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007227992A Expired - Fee Related JP5053764B2 (en) | 2007-09-03 | 2007-09-03 | Developing device, process cartridge, and image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5053764B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013218274A (en) * | 2012-03-12 | 2013-10-24 | Ricoh Co Ltd | Developing device, process unit, and image forming apparatus |
| JP6000621B2 (en) * | 2012-04-26 | 2016-10-05 | キヤノン株式会社 | Developing device, process cartridge, and image forming apparatus |
-
2007
- 2007-09-03 JP JP2007227992A patent/JP5053764B2/en not_active Expired - Fee Related
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