JP2010039308A5 - - Google Patents

Claims (6)

A photoconductor on which a toner image is formed; transfer means for transferring the toner image on the photoconductor to a transfer medium; and a first charge for charging a transfer residual toner on the photoconductor to a polarity opposite to a normal charging polarity of the toner. And a second toner charging member that charges the transfer residual toner on the photoconductor charged by the first toner charging member to the same polarity as the normal charging polarity of the toner. In
Control means for controlling the timing of discharging the transfer residual toner from the first toner charging member and the second toner charging member so as not to overlap each other on the photoconductor;
Applied to the transfer means when transferring the transfer residual toner discharged from the first toner charging member to the transfer medium and when transferring the transfer residual toner discharged from the second toner charging member to the transfer medium. a switching means switching the bias, was perforated,
The image forming apparatus , wherein the control unit discharges the toner from the first toner charging member to the photosensitive member after discharging the toner from the second toner charging member to the photosensitive member .   The control means forms an interval between a region on the photoconductor that discharges toner from the first toner charging member and a region on the photoconductor that discharges toner from the second toner charging member. The image forming apparatus according to claim 1.   The control means applies the voltage having the same polarity as the normal charging polarity of the toner when the region discharged from the first toner charging member passes through the second toner charging member. The image forming apparatus according to claim 1, wherein the toner charging member is controlled. A charging unit that contacts the photosensitive member that has passed through the second toner charging member and charges the toner with the same polarity as the normal charging polarity of the toner during image formation;
The control means applies a DC voltage having the same polarity as that at the time of image formation to the area discharged from the first toner charging member, and applies to the area discharged from the second toner charging member. to apply a ground potential, the image forming apparatus according to claim 1 to 3 any one of claims, characterized in that for controlling the charging unit. A developer carrying member that carries toner and rotates to supply toner to the photosensitive member during image formation;
It said control means, so as to stop the rotation with respect to at least the first region is discharged from a toner charging member, one of claims 1 to 4, wherein the controller controls the developer carrying member The image forming apparatus according to claim 1. A plurality of the photoconductors are arranged in the moving direction of the transfer medium,
Unimaged image forming apparatus of the plurality of the toner transferred to the transfer medium from the photosensitive member is characterized in that it does not overlap on the transfer medium according to claim 1 to 5 any one of claims at.