Importance

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Abstract

Apparatus for stacking a plurality of documents on one edge thereof in vertically disposed position which comprises a movable stacker carriage adapted for movement between a forward and a rear position. An upper stacking screw worm rotatable about a horizontal axis is rigidly attached to the movable stacker carriage and functions to move documents laterally away from the carriage and into stacked relationship. At least one lower stacking screw worm and preferably two lower stacking screw worms rotatable about horizontal axes are rigidly attached to the movable stacker carriage and function to move documents laterally away from the carriage and into stacked relationship. The upper and lower stacking screw worms are rotatable. The stacking apparatus is adapted for use with a device for delivering single documents thereto and the stacking apparatus can be used with a movable transport element such as a conveyor for transporting stacked documents. The stacking apparatus is adapted for movement in response to the pressure of the stacked documents and a sensor can be cooperatively disposed so as to be actuated by movement of the stacking apparatus whereby movement of the moveable transport element carrying stack documents is controlled in response to actuation of the sensor. The sensor such as an electrical contact switch or a photo electric cell can be used to detect movement of the stacking apparatus.

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First Claim