Fixing device and image forming apparatus for holding a recording medium by electrostatic force
AssigneeRicoh Company, Ltd.
InventorsNaoki Iwata, Hiromasa Takagi, Kunihiko Tomita
Life of this patent
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Abstract
A fixing device includes a pressure belt that holds a recording medium by electrostatic force and carries the recording medium. The recording medium has a toner image on a surface that is not in contact with the endless pressure belt. A fixing belt fixes the toner image on the recording medium that is held by the pressure belt.
Claims20
A fixing device in an image forming apparatus, comprising:
- a pressure belt that holds a recording medium by electrostatic force and carries the recording medium, the recording medium having a toner image on a surface that is not in contact with the pressure belt;
- a fixing belt that fixes the toner image on the recording medium that is held by the pressure belt;
- and
- a charging unit that applies an AC voltage to the pressure belt such that alternating regions of the pressure belt have alternate electric charges,
- wherein the alternating regions alternate in a direction that the pressure belt advances.
An image forming apparatus comprising a fixing device, the fixing device including,
- a pressure belt that holds a recording medium by electrostatic force and carries the recording medium, the recording medium having a toner image on a surface that is not in contact with the endless pressure belt;
- a fixing belt that fixes the toner image on the recording medium that is held by the pressure belt;
- and
- a charging unit that applies an AC voltage to the pressure belt such that alternating regions of the pressure belt have alternate electric charges,
- wherein the alternating regions alternate in a direction that the pressure belt advances.
An image forming apparatus comprising a fixing device, the fixing device including,
- a pressure belt that holds a recording medium by electrostatic force and carries the recording medium, the recording medium having a toner image on a surface that is not in contact with the pressure belt;
- a fixing belt that fixes the toner image on the recording medium that is held by the pressure belt;
- and
- a neutralizing unit that neutralizes electric charges on the pressure belt and the recording medium after the toner image has been fixed to the recording medium,
- wherein the neutralizing unit is a neutralizing charger that applies an alternating voltage to the recording medium to neutralize the electric charges.
A fixing device in an image forming apparatus, comprising:
- a pressure belt that holds a recording medium by electrostatic force and carries the recording medium, the recording medium having a toner image on a surface that is not in contact with the pressure belt;
- and
- a fixing belt that fixes the toner image on the recording medium that is held by the pressure belt, and the pressure belt is configured to extend longer than the fixing belt in a direction of dispatch of the recording medium.
An image forming apparatus comprising a fixing device, the fixing device including,
- a pressure belt that holds a recording medium by electrostatic force and carries the recording medium, the recording medium having a toner image on a surface that is not in contact with the pressure belt;
- and
- a fixing belt that fixes the toner image on the recording medium that is held by the pressure belt, and the pressure belt is configured to extend longer than the fixing belt in a direction of dispatch of the recording medium.
Dependencies are inferred from the claim text.