COPIER DOCUMENT SENSING AND CONTROL SYSTEM

摘要

A document sensing and control system for a document handling system for feeding documents across the imaging station of a copier. At a document input area two document sensors are centrally positioned respectively at the upstream and downstream sides of a pre-registration gate to sense the presence or absence of documents to control the document handling system in a desired manner during its operating cycle. Protection is provided, without requiring additional sensors, against improper insertion of documents into the document misfeeding, and lifting of the document handling unit away from the platen.