Oscillating Gate Envelope Straightener
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
A mechanism is provided for assuring that an envelope (or other sheet of material) being fed through an envelope feeder of the roller and gate type is straightened, or aligned, before the gate opens allowing it to pass. The mechanism includes picker rolls 10 designed to drive the edge of the envelope against the face of a pivotally mounted gate 12, which gate periodically opens by means of cam mechanisms 14 as shown in Fig. 1. However, occasionally the envelope will arrive in a skewed position as shown in Fig. 3. In order to straighten the envelope, the gate is oscillated by means of the cam mechanism 14 against the front edge of the envelope.