Patent ID: 8042799
Filing Date: 2011-10-25
Classification: B65H

Abstract:
1. An electrophotographic marking system comprising a paper-feeding station, said paper-feeding station comprising: a sensor and a controller, a vacuum corrugated feeder for use in a sheet-feeding assembly of said marking system, said feeder comprising a feedhead positioned above a sheet-stacking unit and said feedhead having therein a vacuum source and a vacuum port and a spring, said vacuum port facing an ambient environment, a spring-loaded cap positioned over and covering said vacuum port, said cap configured to be removed from said vacuum port once a pressure difference between an interior and exterior of said feedhead is reached to effect a change in state and the pressure difference between the interior and exterior of the feedhead due to the vacuum port being closed creates a force that lifts the cap away and opens the vacuum port, said controller configured to detect said change in state and thereby permit said sheet to be moved to take-away rollers, wherein said change in state is detected by said sensor and controller which are configured to determine and record thereby an acquisition time to be used to set fixed parameters to be used by said controller.