Browse Prior Art Database

Passive Separator for Sheet/Envelope Feeder

IP.com Disclosure Number: IPCOM000080391D
Original Publication Date: 1973-Dec-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

McDaniels, LM: AUTHOR

Abstract

In sheet and envelope feeding from a hopper, multiple feeds occur frequently. This separator minimizes the likelihood that a number of sheets or envelopes will be fed during a feed cycle.

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Passive Separator for Sheet/Envelope Feeder

In sheet and envelope feeding from a hopper, multiple feeds occur frequently. This separator minimizes the likelihood that a number of sheets or envelopes will be fed during a feed cycle.

The passive separator utilizes an inclined plane and flat spring to eliminate or reduce multiple feeding of sheets or envelopes from a hopper which tends to occur, due to the frictional attraction between the sheets or envelopes. The spring is located partway up the inclined plane and restrains the advancement of sheets or envelopes up the inclined plane. The top sheet, having a high-driving force applied to it, overcodes the spring force and advances up the plane. The second or succeeding sheets, having a lower driving force applied than the top sheet, are restrained by the spring force and their advancement halted.

As shown in the figures, sheet 1 is driven from the hopper and advances up the inclined plane. Sheet 1 encounters the flat spring, overcomes the spring force, and continues up the inclined plane. As sheet 1 moves up the inclined plane, it loses contact with the spring, and thus the spring no longer affects it.

As sheet 2 is driven along with sheet 1, it also encounters the flat spring. Since it has less driving force than the top sheet, its advancement is stopped. The force applied by the flat spring must be less than the driving force applied to sheet 1, but greater than the driving force applied to sheet 2.

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