Transfer type electrostatic reproducing apparatus

In electrostatic reproducing apparatus comprising a charge receptor upon which an electrostatic latent image is formed, developing means to which a developing current is supplied for developing the electrostatic image into a toner image, transferring means for transferring the toner image from the charge receptor to a transfer medium, and charging means for causing the transfer medium to be detached from the charge receptor, the improvement characterized by:

• a detecting means for detecting toner image density on said charge receptor provided between said developing means and said charging means, whereby a discharge current of said charging means can be changed according to information from said detecting means.

In electrostatic reproducing apparatus comprising a charge receptor upon which an electrostatic latent image is formed, developing means to which a developing current is suppied for developing the electrostatic image into a toner image, transferring means for transferring the toner image from the charge receptor to a transfer medium, and charging means for causing the transfer medium to be detached from the charge receptor, the improvement characterized by:

• a detecting means for detecting toner image density on said charge receptor and an exposure means for producing light provided between said developing means and said charging means, whereby the quantity of light irradiated onto said charge receptor from said exposure means can be changed according to information from said detecting means.

In electrostatic reproducing apparatus comprising a charge receptor upon which an electrostatic latent image is formed, developing means to which a developing current is supplied for developing the electrostatic image into a toner image, transferring means for transferring the toner image from the charge receptor to a transfer medium, and charging means for causing the transfer medium to be detached from the charge receptor, the improvement characterized by:

• a detecting means for detecting developing current at the time of development provided in said developing means, whereby a discharge current of said charging means can be changed according to information from said detecting means.

In electrostatic reproducing apparatus comprising a charge receptor upon which an electrostatic latent image is formed, developing means to which a developing current is supplied for developing the electrostatic image into a toner image, transferring means for transferring the toner image from the charge receptor to a transfer medium, and charging means for causing the transfer medium to be detached from the charge receptor, the improvement characterized by:

• a detecting means for detecting a surface potential on said charge receptor after formation of the electrostatic latent image is provided, whereby a discharge current of said charging means can be changed according to an output signal from said detecting means.

In electrostatic reproducing apparatus comprising a charge receptor upon which an electrostatic latent image is formed, developing means to which a developing current is supplied for developing the electrostatic image into a toner image, transferring means for transferring the toner image from the charge receptor to a transfer medium, and charging means for causing the transfer medium to be detached from the charge receptor, the improvement characterized by:

• a detecting means for detecting a surface potential on said charge receptor after formation of the electrostatic latent image, and an exposure means provided between said developing means and said charging means, whereby the quantity of light irradiated onto said charge receptor from said exposure means can be changed according to an output signal from said detecting means.