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US 2004/0071476 A1Published application
Method of and apparatus for forming image
AssigneeRicoh Company, Ltd.
InventorsYukiko Iwasaki, Ken Amemiya
Life of this patent
Estimating the term…
Abstract
A charger charges a body with a voltage in which an AC voltage is superimposed on a DC voltage. The charger and the body have a small gap therebetween. A sensor measures a humidity in the gap between the charger and the body. A magnitude of the AC voltage to be superimposed on the DC voltage is determined based on the humidity detected.
Claims30
An image forming apparatus comprising:
- a charger that charges a body with a voltage in which an AC voltage is superimposed on an DC voltage, wherein the charger is not in contact with the body;
- a humidity detecting unit that detects a humidity in a space between the charger and the body;
- and
- a correcting unit that decides a magnitude of the AC voltage to be superimposed on the DC voltage based on the humidity.
1 more element
An image forming apparatus comprising:
- a charger that charges a body with a voltage in which an AC voltage is superimposed on an DC voltage, wherein the charger is not in contact with the body;
- a humidity detecting unit that detects a humidity in a space between the charger and the body;
- a temperature detecting unit that detects a temperature in the space between the charger and the body;
- and
- a correcting unit that decides a magnitude of the AC voltage to be superimposed on the DC voltage based on at least one of the humidity and the temperature.
2 more elements
A method of forming image comprising:
- detecting a humidity in a space between a charger and a body, wherein the charger charges the body with a voltage in which an AC voltage is superimposed on an DC voltage;
- deciding a magnitude of the AC voltage to be superimposed on the DC voltage based on the humidity.
A method of forming image comprising:
- detecting a humidity and a temperature in a space between a charger and a body, wherein the charger charges the body with a voltage in which an AC voltage is superimposed on an DC voltage;
- deciding a magnitude of the AC voltage to be superimposed on the DC voltage based on at least one of the humidity and the temperature.
Dependencies are inferred from the claim text.