Method of operating an electrophotographic copying apparatus wherein original documents are replaced during preliminary scannning, and apparatus for carrying out the method

摘要

An electrophotographic copying apparatus is equipped with an automatic document feeder and an optical system for exposing a document by scanning. The automatic document feeder feeds and places the first original document on a platen glass table where the first document is exposed to light. The optical system exposes the first document by scanning light subsequent to a preliminary movement of the optical system. The automatic document feeder replaces the first document with the second original document, while delivering out the first document, wherein replacing the first document with the second one during the period while the optical system is carrying out the preliminary movement after exposure of the first document.