Image forming apparatus having control based on detected toner charge and transfer efficiency
AssigneeCanon Kabushiki Kaisha
InventorsAkio Suzuki, Hisashi Fukushima, Haruhiko Moriguchi, Yasushi Miura, Nobuatsu Sasanuma
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Abstract
An image forming apparatus has an image bearing member; a toner image forming device for forming a toner image on the image bearing member; a transfer charger for transferring the toner image from the image bearing member onto a transfer material; a first detector for detecting toner charge amount before image transfer onto the transfer material; a second detector for detecting the efficiency of the image transfer; and a controller for controlling a condition of image transfer operation in accordance with outputs of the first and second detector.
Claims21
An image forming apparatus, comprising:
- an image bearing member;
- toner image forming means for forming a toner image on said image bearing member;
- transfer charging means for transferring the toner image from said image bearing member onto a transfer material;
- first detecting means for detecting toner charge amount before image transfer onto the transfer material;
- second detecting means for detecting efficiency of the image transfer;
- and
- control means for controlling a condition of image transfer operation in accordance with outputs of said first and second detecting means.
An image forming apparatus, comprising:
- an image bearing member;
- toner image forming means for forming a toner image on said image bearing member;
- transfer charging means for transferring the toner image from said image bearing member onto a transfer material;
- detecting means for detecting an electric current of said transfer charging means which is contributable to image transfer;
- and
- control means for controlling a toner charge amount before the image transfer in accordance with an output of said detecting means.
Dependencies are inferred from the claim text.