Back to results
US 2014/0153946 A1Published application
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShinsuke Kobayashi, Keisuke Ishizumi
Life of this patent
Estimating the term…
Abstract
The image forming apparatus includes the control unit controls the potential at a transfer portion of a rotary to be a potential of the same polarity as the charged polarity of the toner at development, when an image forming apparatus starts rotating a photosensitive member, after the start of output by a common power supply and before a charge area on the photosensitive member reaches the transfer portion.
Claims13
An image forming apparatus comprising:
- a rotatable photosensitive member;
- a charging device that charges the photosensitive member;
- an exposure device that exposes the charged photosensitive member to form an electrostatic latent image on the photosensitive member;
- a developing device that supplies toner to the photosensitive member to develop an electrostatic latent image on the photosensitive member as a toner image;
- a common power supply that applies voltage to the charging device and the developing device;
- a movable rotary member that forms a transfer portion with the photosensitive member to receive the toner image from the photosensitive member or to convey a recording material that receives the toner image;
- and
- a control unit that controls potential at the transfer portion of the rotary member,
- wherein when the photosensitive member starts rotating, during a period after the common power supply starts outputting and before a charge area charged by the charging device on the photosensitive member reaches the transfer portion, the control unit controls the potential at the transfer portion of the rotary member to be a potential of same polarity as charged polarity of the toner.
6 more elements
Dependencies are inferred from the claim text.