Image forming apparatus and transfer bias compensation method of the same
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorSunao Takenaka
Life of this patent
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Abstract
An electrode pair provided upstream of a transfer section in a conveyance direction nips a recording medium and applies an AC bias. A characteristic detection section detects a characteristic of a recording medium when the AC bias is applied. A control section refers to a corresponding relation of a storage section based on a characteristic value detected by the characteristic detection section, and compensates a transfer bias value applied to the transfer section.
Claims20
An image forming apparatus comprising:
- an image forming section configured to include an image carrier and forms a developer image on the image carrier;
- a transfer section configured to transfer the developer image on the image carrier to a recording medium;
- a transfer bias supply section configured to supply a transfer bias voltage to the transfer section;
- an electrode pair provided upstream of the transfer section in a conveyance direction of the recording medium and configured to nip the recording medium and to apply an AC bias to the recording medium;
- a characteristic detection section configured to detect an electric characteristic value of the recording medium when the electrode pair applies the AC bias;
- a storage section configured to store a corresponding relation between the detected characteristic value and a transfer bias value;
- and
- a control section configured to refer to the corresponding relation of the storage section based on the characteristic value detected by the characteristic detection section and to compensate the transfer bias value applied to the recording medium.
A transfer bias compensation method of an image forming apparatus, the method comprising the steps of:
- forming, by an image forming section configured to include an image carrier, a developer image on the image carrier;
- nipping, by an electrode pair provided upstream of a transfer section configured to transfer the developer image on the image carrier to a recording medium in a conveyance direction of the recording medium, the recording medium and applying an AC bias to the recording medium;
- detecting, by a characteristic detection section configured to detect an electric characteristic value of the recording medium, the characteristic value;
- and
- referring to, by a control section, a corresponding relation of a storage section configured to store a corresponding relation between a characteristic value of the recording medium and a transfer bias value based on the characteristic value detected by the characteristic detection section, and compensating a transfer bias value applied to the recording medium.
Dependencies are inferred from the claim text.