JP2015079059A5

JP2015079059A5 -

Info

Publication number: JP2015079059A5
Application number: JP2013214949A
Authority: JP
Filing date: 2013-10-15
Publication date: 2017-01-12
Anticipated expiration: 2033-10-15

Description

（態様Ｅ）
上記態様Ａ〜Ｄのいずれかの態様において、上記現像剤は、トナーとキャリアからなる二成分現像剤であり、上記キャリアの体積固有抵抗値が１．０×１０^８［Ω・ｃｍ］以上１．０×１０^１０［Ω・ｃｍ］以下であることを特徴とする。
これによれば、現像効率を更に向上させることができる。 (Aspect E)
In any one of the above embodiments A to D, the developer is a two-component developer including a toner and a carrier, and the volume specific resistance value of the carrier is 1.0 × 10 ⁸ [Ω · cm] or more and 1 0.0 × 10 ¹⁰ [Ω · cm] or less.
According to this, the development efficiency can be further improved.

Claims

A developer carrier that carries the developer on the surface and is disposed opposite to the latent image carrier;
In order to form an alternating electric field for moving the toner in the developer from the developer carrier side to the latent image carrier side in a development area where the latent image carrier and the developer carrier are opposed to each other, In a developing device having an alternating voltage applying means for applying an alternating voltage to the developer carrier,
The alternating voltage applying means has a polarity in the developing direction for moving the toner from the developer carrier side to the latent image carrier side, and has a voltage value whose absolute value is larger than the waveform portion in the developing direction in the alternating voltage and A narrow development width waveform with a narrow time width and a non-development direction polarity for moving toner from the latent image carrier side to the developer carrier side, and a voltage whose absolute value is larger than the waveform portion of the alternating voltage in the non-development direction A voltage having a narrow waveform that is at least one of the non-development narrow waveforms having a value and a narrow time width included in the waveform of the alternating voltage so that the relative position with respect to the waveform of the alternating voltage changes over time Is applied to the developer carrying member.

The developing device according to claim 1.
The alternating voltage applying means applies to the developer carrier a voltage in which the narrow waveform is periodically included in the alternating voltage at a frequency different from the frequency of the alternating voltage within a predetermined frequency range. A developing device.

The developing device according to claim 1 or 2,
2. The developing device according to claim 1, wherein the time width of the narrow waveform is 50% or less of the time width of the waveform portion in the developing direction or the waveform portion in the non-developing direction in the alternating voltage.

The developing device according to any one of claims 1 to 3,
The developing device according to claim 1, wherein the toner has a volume average particle diameter of 4 [μm] to 7 [μm].

The developing device according to any one of claims 1 to 4,
The developer is a two-component developer composed of a toner and a carrier,
A developing device, wherein the carrier has a volume resistivity of 1.0 × 10 ⁸ [Ω · cm] or more and 1.0 × 10 ¹⁰ [Ω · cm] or less.

The developing device according to any one of claims 1 to 5,
The developing device according to claim 1, wherein the alternating voltage is set so that the toner reciprocates with an amplitude of 0.3 [μm] or more and 30 [μm] or less in the developing region.

A latent image carrier, a latent image forming unit for forming a latent image on the latent image carrier, and a developing unit for performing a development process for attaching toner to the latent image on the latent image carrier, In an image forming apparatus for finally transferring a toner image formed on the latent image carrier by development processing to a recording material and forming an image on the recording material,
An image forming apparatus using the developing device according to claim 1 as the developing unit.