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US 8,554,113 B2Granted
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorHiroyuki Kidaka
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a corona charger having an opening, a shutter configured to open and close the opening of the corona charger, a humidity sensor configured to detect humidity, and a control unit configured to control the so that time from ending an image forming process to closing the opening using the shutter is reduced when the humidity detected by the humidity sensor increases.
Claims24
A charging device comprising:
- a corona charger having an opening;
- a shutter configured to open and close the opening of the corona charger;
- a humidity sensor configured to detect humidity;
- and
- a control unit configured to control an amount of time from ending an image forming process to starting to close the opening using the shutter, based on the humidity detected by the humidity sensor.
2 more elements
An image forming apparatus comprising:
- a photosensitive member;
- a corona charger having an opening and configured to charge the photosensitive member;
- an image forming unit configured to form a toner image on a surface of the photosensitive member charged by the corona charger;
- a transfer unit configured to transfer the toner image formed on the surface of the photosensitive member by the image forming unit onto a recording material;
- a fixing unit configured to heat and pressurize the recording material on which the toner image is transferred by the transfer unit so as to fix the toner image on the recording material;
- a shutter configured to open and close the opening of the corona charger;
- a humidity sensor configured to detect humidity;
- and
- a control unit configured to control an amount of time from ending an image forming process to starting to close the opening using the shutter, based on the humidity detected by the humidity sensor.
6 more elements
A charging device comprising:
- a corona charger having an opening;
- a shutter configured to open and close the opening of the corona charger;
- a humidity sensor configured to detect humidity;
- a temperature sensor configured to detect temperature;
- and
- a control unit configured to control an amount of time from ending an image forming process to starting to close the opening using the shutter, based on moisture content acquired from the temperature detected by the temperature sensor and the humidity detected by the humidity sensor.
3 more elements
An image forming apparatus comprising:
- a photosensitive member;
- a corona charger having an opening and configured to charge the photosensitive member;
- an image forming unit configured to form a toner image on a surface of the photosensitive member charged by the corona charger;
- a transfer unit configured to transfer the toner image formed on the surface of the photosensitive member by the image forming unit onto a recording material;
- a fixing unit configured to heat and pressurize the recording material on which the toner image is transferred by the transfer unit so as to fix the toner image on the recording material;
- a shutter configured to open and close the opening of the corona charger;
- a humidity sensor configured to detect humidity;
- a temperature sensor configured to detect temperature;
- and
- a control unit configured to control an amount of time from ending an image forming process to starting to close the opening using the shutter, based on moisture content acquired from the temperature detected by the temperature sensor and the humidity detected by the humidity sensor.
7 more elements
Dependencies are inferred from the claim text.