1. A photocopying machine designed for electrostatic printing.
2. A printing copier which employs principles of electrostatography or all of the processes involving the forming and uses of electrostatic charged patterns for recording and reproducing images.
3. A type of copier that employs the principles of photoconductivity and electrostatic attraction.
4. A copying machine in which a photosensitive material is electrically charged in the pattern of the original being copied, and the potential image is developed by applying a finely powdered carbon toner which has been oppositely charged.

Examples include Xerox and Electrofax copying processes.