Electrostatic recorder and electrostatic latent image measuring instrument

An electrostatic recorder comprising:

• a print process control means having electrostatic charge means for uniformly charging a surface of a photosensitive substance;
• exposure means for exposing and forming an electrostatic latent image on the surface of said photosensitive substance;
• development means for forming a visible image;
• transfer means for transferring said visible image onto a paper;
• an electrostatic latent image measuring unit for measuring variation of a part of an electric charge quantity formed by a single exposure scanning operation on the surface of the photosensitive substance, said electrostatic latent image measuring unit including distance control means for maintaining a predetermined distance between said electrostatic latent image measuring unit and said photosensitive substance when measuring the state of the electrostatic latent image;
• and
• wherein said print process control means controls at least one portion of a printing process in dependence upon a measurement result of the electrostatic latent image.

An electrostatic recorder for uniformly charging a surface of a photosensitive substance by electrostatic charge means, carried out by exposure by exposure means, forming an electrostatic latent image on the surface of said photosensitive substance, forming a visible image by development means, and transferring said visible image onto a paper by transfer means, comprising:

• an electrostatic latent image measuring unit for measuring a state of an electrostatic latent image formed on the surface of said photosensitive substance;
• and
• control means for varying control factors related to a printing process from an electrostatic charge on the surface of said photosensitive substance by said electrostatic charge means to transfer the visible image onto the blank by the transfer means in accordance with results of a measurement of the electrostatic latent image, and
• wherein said electrostatic latent image measuring unit measures variation of electric charge quantity or electric potential from every repetitive dotted pattern of the electrostatic latent image, formed by exposure, along the surface of said photosensitive substance in a revolving direction.