System and Method for Full Escort Mixed Mail Sorter Using Mail Clamps

• US 20080230449A1
• Filed: 12/07/2005
• Published: 09/25/2008
• Est. Priority Date: 12/07/2004
• Status: Active Grant

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Stemmle, Denis J.
• Granted Patent: US 8,022,329 B2
• Time in Patent Office: Days
• US Class Current: 209/584
• CPC Class Codes: B07C 3/08 using arrangements of conveyors transport of sheets B65H; transport in general B65G
• CPC Class Codes: B65H 2405/55 Rail guided gripping means running in closed loop, e.g. without permanent interconnecting means
• CPC Class Codes: B65H 2701/1916 Envelopes and articles of mail
• CPC Class Codes: B65H 29/003 by grippers B65H29/02 takes precedence
• CPC Class Codes: G06Q 10/08 Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
• CPC Class Codes: G08G 1/202 Dispatching vehicles on the basis of a location, e.g. taxi dispatching
• CPC Class Codes: Y10S 209/90 Sorting flat-type mail
• CPC Class Codes: Y10S 209/912 Endless feed conveyor with means for holding each item individually

Abstract

A sorting system accepts a group of mail pieces at a loading station, sorts them, and then moves them to an unloading station. The system includes a reader for retrieving delivery information associated with each mail piece, and also includes clamps dimensioned for receipt of a mail piece into each clamp. The system has a device for creating an association between the retrieved delivery information of each mail piece and its respective clamp. The system also has a sorter for moving the clamps holding the mail pieces, based upon the association of each clamp with the retrieved delivery information, so that the mail pieces held by the clamps are sorted according to a desired delivery sequence. Additionally, the system includes a mechanism for opening the sorted clamps to release the mail pieces at the unloading station.

Claims

1. A sorting system, for accepting a group of mail pieces at a loading station, for sorting the group of mail pieces into a desired sequence according to delivery information on the mail pieces, and for moving the mail pieces to at least one unloading station, the system comprising:

a reader for retrieving delivery information associated with each mail piece from a plurality of the mail pieces;

a plurality of clamps, each clamp dimensioned for receipt of at least one mail piece;

means for placing each mail piece from the group into one of said clamps;

means for creating an association between the retrieved delivery information of each mail piece and its respective clamp;

a sorter for moving the clamps which hold the mail pieces, based upon the association of each clamp with the retrieved delivery information, so that the mail pieces held by said clamps are sorted according to the desired sequence; and

means for opening the sorted clamps to release the mail pieces at the at least one unloading station.

2. The sorting system of claim 1 wherein the desired sequence is an order in which the mail pieces are intended to be delivered.

3. The sorting system of claim 1, wherein the delivery information of at least one of the mail pieces includes address information indicative of a destination address, and wherein a respective one of the clamps comprises:

jaws for releasably holding the mail piece; and

a machine readable identifying means;

wherein the identifying means includes clamp information which, in combination with the address information on the mail piece, enables sortation of the mail piece.

4. The sorting system of claim 1 wherein the clamps are dimensioned for handling each mail piece so that each mail piece received by one of the clamps is positioned by the clamp so that a face of the mail piece is at least temporarily substantially perpendicular to the direction of motion of the mail piece.

5. The sorting system of claim 1 wherein the mail pieces have faces such that, when the mail pieces are respectively received by the clamps, the faces are at least temporarily positioned face to face relative to each other, each of the mail pieces being in a generally vertical orientation.

6. The sorting system of claim 1, wherein the unloading station is configured so that the clamps move to an inverted orientation whereby the clamps are beneath each of the respective mail pieces at the unloading station.

7. The sorting system of claim 6, wherein the sorting system includes means for orienting the clamps above the respective mail pieces, at a point before reaching the unloading station.

8. The sorting system of claim 6,

wherein the means for opening the sorted clamps includes a jaw opener that opens each of the clamps, and

wherein the system further comprises means for lowering each of the clamps away from the mail piece previously held by the clamp, after the clamp is opened.

9. The sorting system of claim 7, wherein the loading station is configured so that the clamps exiting the loading station move from an inverted orientation, in which the clamps are respectively beneath the mail pieces, to a non-inverted orientation.

10. The sorting system of claim 1, further comprising recycling equipment, for recycling at least one of the clamps from the unloading station to the loading station.

11. The sorting system of claim 1, wherein the loading station is configured so that the clamps are fed into a queue before moving the queue from the loading station.

12. The sorting system of claim 10, configured for simultaneously loading, sorting, and unloading separate batches of the mail pieces.

13. The sorting system of claim 1, configured for handling non-machine readable mail pieces in substantially the same fashion as machine readable mail.

14. The sorting system of claim 1, wherein the sorter includes at least one first drive system, at least one second drive system, and means for moving the clamps from the at least one first drive system to the at least one second drive system.

15. The sorting system of claim 14, wherein the sorter includes a controller for assigning address information to the at least one second drive system, and for moving to the second drive system only the clamps having mail destined for an address corresponding to the address information.

16. The sorting system of claim 1, further comprising means for initially spacing the clamps at a distance from one another, and for subsequently reducing the distance at least temporarily when the clamps are between the loading station and the at least one unloading station.

17. A method of mail sortation, for accepting a group of mail pieces at a loading station, for sorting the group of mail pieces into a desired sequence according to delivery information on the mail pieces, and for moving the mail pieces to at least one unloading station, comprising:

retrieving delivery information associated with each mail piece from a plurality of the mail pieces;

placing each mail piece from the group into one of a plurality of clamps;

creating an association between the retrieved delivery information of each mail piece and its respective clamp;

moving the clamps which hold the mail pieces, based upon the association of each clamp with the retrieved delivery information of the mail piece held by the clamps, so that the mail pieces held by said clamps are sorted according to the desired sequence; and

opening the sorted clamps to release the mail pieces at the at least one unloading station.

18. The method of claim 17, wherein the clamps handle each mail piece so that, at least temporarily, each mail piece is substantially perpendicular to the direction of motion of the mail piece.

19. The method of claim 17, in which the desired sequence is the order in which the mail pieces are intended to be delivered.

20. The method of claim 17 wherein the mail pieces are at least temporarily positioned face to face relative to each other, each of the mail pieces being in a generally vertical orientation.

21. The method of claim 17, wherein the clamps move to an inverted orientation whereby the clamps are beneath each of the respective mail pieces at the unloading station.

22. The method of claim 21, wherein the clamps are oriented above the respective mail pieces at a point before reaching the unloading station.

23. The method of claim 17, wherein the clamps exiting the loading station move from an inverted orientation, in which the clamps are respectively beneath the respective mail pieces at the loading station, to a non-inverted orientation.

24. The method of claim 21, wherein each of the clamps is opened as the clamp advances to a jaw opener, and wherein each of the clamps is lowered away from the mail piece after the clamp is opened.

25. The method of claim 17, wherein at least one of the clamps is recycled from the unloading station to the loading station.

26. A method for sorting a group of unsorted mail pieces, having faces containing delivery information, into a desired sequence according to the delivery information on the faces, comprising:

arranging the group of unsorted mail pieces in a face to face orientation;

moving the group of unsorted mail pieces in a direction perpendicular to the plane of the mail piece faces;

diverting individual mail pieces in a direction substantially lateral to the direction of the group, in accordance with the delivery information;

collecting at least one of the individual pieces diverted substantially laterally, in at least one common location, arranged in face to face orientation; and

moving the at least one individual pieces collected in the common location, in a direction parallel to the direction of the unsorted mail pieces.