Document Feeder Air System
Original Publication Date: 1987-Jan-01
Included in the Prior Art Database: 2005-Jan-31
A constant-flow air system is provided for a copier's original document feeder. Total system airflow rate remains nearly constant under the various system operating conditions of the document feeder. The document feeder has six different airflow paths. Three paths require vacuum, and three require pressure. Five of the six air paths operate at high resistance and low flow. The remaining path operates at low resistance and high flow. For the five high resistance paths, the total airflow volume required by the vacuum paths equals the total flow required by the pressure paths. A common blower 10 is used for all six air paths. To compensate for different flow resistances, a restrictor 11 is used between document belt 12 and the blower.