Browse Prior Art Database

Oscillating Gate Envelope Straightener

IP.com Disclosure Number: IPCOM000034699D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Denny, CM: AUTHOR

Abstract

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.

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Oscillating Gate Envelope Straightener

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. The oscillating motion combined with the action of the picker rolls 10 will swing the envelope around to a position wherein its leading edge is in contact with the gate, and the skewing or misalignment of the envelope has been corrected, and when the gate opens, the envelope will be delivered in an aligned configuration (Fig. 4). As shown in Fig. 2, the dwells on the cam can be formed such that the desired amplitude and frequency of oscillation can be achieved. In fact, if desired, the amplitude and/or frequency can be different at different stages in the cycle. For example, the cycle could start with relatively large amplitude and diminish in amplitude at the end of the cycle. The cam can also be varied.

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