Method of maintaining the correct conditions of an electrophotographically duplicated image

USRE32330E · kind E · reissue

Assignee

• RICOH COMPANY, LTD. · JP

Inventors

• Seiichi Miyakawa · Nagareyama, JP
• Susumu Tatsumi · Tokyo, JP
• Koji Sakamoto · Tokyo, JP

Key dates

• Filing date: Nov 18, 1983
• Grant date: Jan 13, 1987
• Expiry date: Nov 18, 2003

Classification

• Technology area (CPC —): General

Abstract

A method of maintaining the correct conditions of an electrophotographically duplicated image, which uses a reference plate having at least a dark-tone area and a light-tone area and in which signals associated with the reference plate are detected and synthesized to control the duplicating process conditions such as developing bias potential, charge, exposure and of the optical system so that an optimum image may be produced.