Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKenzo Takayama, Haruo Shimizu
Life of this patent
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Abstract
An image forming apparatus such as a laser beam printer has a laser mechanism, an optical system for forming a latent image on a photosensitive drum, a separation charge eliminator for separating a transfer material with a toner image transferred thereonto from the drum, and a printer controller for controlling the print operation. A high voltage is applied to the charge eliminator for a non-image zone of the original, and a low voltage is applied for an image zone of the original. The application voltage for the charge eliminator is obtained by superposing a DC voltage on an AC voltage. A system including a reader, a CCU, and a printer is also provided.
Claims20
An image forming apparatus comprising:
- a recording medium;
- image forming means for forming an image on said recording medium in accordance with an input image signal;
- convey means for conveying a transfer material;
- separating means for separating from said recording medium the transfer material which is conveyed by said convey means;
- detection means for detecting a state of said input image signal;
- and
- control means for controlling said separating means in accordance with an output of said detection means.
An image forming apparatus comprising:
- a recording medium;
- image forming means for forming an image on said recording medium in accordance with an input image signal;
- transfer means for transferring an image formed on said recording medium onto a transfer material;
- detection means for detecting a state of said input image signal;
- and
- control means for controlling said transfer means in accordance with an output of said detection means.
An image forming apparatus comprising:
- read means for reading an image of an original;
- means for reproducing the image of the original read by said read means onto a recording medium;
- convey means for conveying a transfer material;
- separating means for separating from said recording medium the transfer material which is conveyed by said convey means;
- detection means for detecting a state of an image signal outputted from said read means;
- and
- control means for controlling said separating means in accordance with an output of said detection means.
An image forming apparatus comprising:
- a recording medium;
- image forming means for forming an image on said recording medium;
- transfer means for transferring an image formed on said recording medium onto a transfer material;
- detection means for detecting an image area or a non-image area on said recording medium;
- and
- control means for controlling said transfer means in accordance with a detection output of said detection means.
Dependencies are inferred from the claim text.