Image forming apparatus to prevent toner deformation
AssigneeRicoh Company, Ltd.
InventorsYasushi Koichi, Mitsuo Aoki, Bing Shu, Koji Suzuki, Shigeru Watanabe, Tadashi Kasai, Yutaka Takahashi
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Abstract
In an image forming apparatus configured to electrostatically transfer a toner image formed on an image carrier to a recording medium with image transferring means of the present invention, pressure is applied between the image carrier and the image transferring means. Toner is provided with relatively high hardness in accordance with the pressure beforehand. Image transfer is effected by reducing a potential difference between the image carrier and the recording medium while maintaining an electric field around the toner the same.
Claims25
An image forming apparatus comprising:
- image transferring means for electrostatically transferring a toner image formed on an image carrier to a recording medium;
- means for applying pressure between said image carrier and said image transferring means;
- toner with a hardness sufficient to prevent deformation due to the pressure
- wherein a potential difference between said image carrier and the recording medium is reduced, based on the pressure, while maintaining a same electric field, directly proportional to the potential difference, between said image carrier and the recording medium and around the toner therebetween.
An image forming apparatus comprising:
- image transferring means for electrostatically transferring a toner image formed on an image carrier to a recording medium;
- means for applying a pressure between said image carrier and said image transferring device;
- toner with a cohesion degree sufficient to prevent deformation due to the pressure,
- wherein a potential difference between said image carrier and the recording medium is reduced, based on the pressure, while maintaining a same electric field, directly proportional to the potential difference, between said image carrier and the recording medium and around the toner therebetween.
A method of electrostatically transferring a toner image formed on an image carrier to a recording medium with image transferring device, comprising:
- applying a pressure between said image carrier and said image transferring means;
- providing toner with a hardness sufficient to prevent deformation due to the pressure;
- and
- reducing a potential difference between said image carrier and the recording medium while maintaining a same electric field, directly proportional to the potential difference, between said image carrier and the recording medium and around the toner therebetween.
A method of electrostatically transferring a toner image formed on an image carrier to a recording medium with image transferring device, comprising:
- applying a pressure between said image carrier and said image transferring means;
- providing a toner with a cohesion degree sufficient to prevent deformation due to the pressure;
- and
- reducing a potential difference between said image carrier and the recording medium while maintaining a same electric field, directly proportional to the potential difference, between said image carrier and the recording medium and around the toner therebetween.
Dependencies are inferred from the claim text.