Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsNorihisa Hoshika, Hiroyuki Adachi, Kimio Nakahata
Life of this patent
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Abstract
An image forming apparatus provided with an image transfer discharger for electrostatically transferring the toner image from an image bearing member to a transfer material. It is further provided with charge removing member for removing charge so as to allow the electrostatically attached transfer material from the image bearing member. The charge removing electrode is supplied with a bias voltage from a power source for the developing device, thus the additional means required for the charge removing electrode is minimized. The discharging electrode extends from a bottom of a recess formed by an insulating member. The recess is larger away from the free end of the discharging electrode toward the outside.
Claims23
An image forming apparatus, comprising:
- an image bearing member;
- transferring means for electrostatically transferring a toner image formed on said image bearing member onto a transfer material;
- a charge removing electrode disposed downstream of said transferring means with respect to movement of the transfer material;
- and
- power source means for applying to said charge removing electrode a voltage not higher than a voltage with which a self discharge starts;
- developing means for forming the toner image on said image bearing member;
- and
- power source means for supplying a developing bias to said developing means, wherein said power source means for said charge removing electrode uses said power source means for said developing bias.
An image forming apparatus, comprising:
- an image bearing member;
- transferring means for electrostatically transferring a toner image formed on said image bearing member onto a transfer material;
- a charge removing electrode, disposed downstream of said transferring means with respect to movement of the transfer material, for removing charge from the transfer material using self-discharge;
- and
- power source means for applying to said charge removing electrode a voltage not higher than a voltage with which the self-discharge starts;
- an insulating member defining space in which said charge removing electrode is exposed, said space increasing in width toward the image bearing member.
An image forming apparatus, comprising:
- an image bearing member;
- transferring means for electrostatically transferring a toner image formed on said image bearing member onto a transfer material;
- a charge removing electrode, disposed downstream of said transferring means with repsect to movement of the transfer material, for removing charge from the transfer material using self-discharge;
- and
- power source means for applying to said charge removing electrode a voltage to higher than a voltage with which the self-discharge starts;
- an insulating member defining a wall upstream of said charge removing means, said wall providing a surface, at a downstream side thereof, which is inclined to an upstream side in a direction toward the image bearing member.
Dependencies are inferred from the claim text.