Paper separation and singulation apparatus and method

• US 6,634,578 B1
• Filed: 11/08/2000
• Issued: 10/21/2003
• Est. Priority Date: 10/19/2000
• Status: Expired due to Fees

• Current Assignee: Eco-Shred Ltd.
• Original Assignee: Eco-Shred Ltd.
• Inventors: Greenspan, Sheldon, Khalfan, Zaheer
• Primary Examiner(s): HUSAR, JOHN
• Application Number:
  US09/708,037
• Time in Patent Office: 1,077 Days
• Field of Search: 241/24.1, 241/24.29, 241/27, 241/79, 241/186.35, 241/236, 241/DIG.38
• US Class Current: 241/24.29
• CPC Class Codes: D21B 1/08 the raw material being waste paper chemical part D21C5/02; the raw material being rags
• CPC Class Codes: Y02W 30/64 Paper recycling

Abstract

A mechanical system that separates bundles of paper and presents the separated paper on a conveyor in a single layer fashion, for further processing. The paper is accumulated in a hopper and fed into the mechanical separating mechanism in a batch mode. When sufficient volume has been admitted to the container, the inflow port is closed and the mechanical separating impeller are activated to rotate in the same direction, imparting bidirectional forces on compacted bundles of sheets or shreds, causing them to deaggregate. Upon completion of the separation cycle, the separated sheets are expelled through an outlet port and conveyed to a drop chute for further singulation, from which the singulated sheets may be deposited onto one or more conveyor belts for sorting.

Claims

1. A paper separation apparatus for separating bundles of paper sheets or paper shreds, comprising

a receiving hopper for depositing regulated batches of the bundles onto an infeed conveyor,

a batch fluffer positioned adjacent to a terminal end of the infeed conveyor, comprising a vessel and a pair of adjacent impellers having blades adapted for rotation at selected speeds,

wherein rotation of the impellers subjects the bundles to bidirectional forces which overcome frictional and binding forces within the bundles and separates the paper sheets or paper shreds into deaggregated paper sheets or paper shreds.

2. The paper separation apparatus as defined in claim 1 in which the batch fluffer deposits the deaggregated paper sheets or paper shreds into a surge hopper for conveyance to a sorting station.

3. The paper separation apparatus as defined in claim 2 in which the deaggregated paper sheets or paper shreds are deposited into a drop chute for deposit onto a sorting stage.

4. The paper separation apparatus as defined in claim 3 in which the surge hopper deposits the deaggregated paper sheets or paper shreds onto a surge conveyor for conveyance to the drop chute.

5. The paper separation apparatus as defined in claim 4 in which the surge conveyor slopes upwardly.

6. The paper separation apparatus as defined in claim 1 in which the infeed conveyor slopes upwardly.

7. The paper separation apparatus as defined in claim 1 in which the blades are substantially planar.

8. The paper separation apparatus as defined in claim 7 in which the impellers are disposed in overlapping relation.

9. The paper separation apparatus as defined in claim 1 in which the impellers rotate in the same direction.

10. The paper separation apparatus as defined in claim 1 in which the outlet closure substantially conforms to the rotational profile of the impellers.

11. A method of separating bundles of paper sheets or paper shreds, comprising the steps of

a. depositing regulated batches of the bundles into a receiving hopper,

b. conveying the batches to a fluffing apparatus comprising a vessel and a pair of adjacent impellers having blades adapted for rotation at selected speeds, and

c. rotating the impellers to subject the bundles to bidirectional forces which overcome frictional and binding forces within the bundles to deaggregate the paper sheets or paper shreds.

12. The method as defined in claim 11 including the further step of

d. depositing the deaggregated paper sheets or paper shreds into a surge hopper for conveyance to a sorting station.

13. The method as defined in claim 12 including the further step of

e. depositing the deaggregated paper sheets or paper shreds into a drop chute for deposit onto sorting stage.

14. The method as defined in claim 13 in which the surge hopper deposits the deaggregated paper sheets or paper shreds onto a surge conveyor for conveyance to the drop chute.

15. The method as defined in claim 14 in which the surge conveyor slopes upwardly.

16. The method as defined in claim 11 in which the infeed conveyor slopes upwardly.

17. The method as defined in claim 11 in which the blades are substantially planar.

18. The method as defined in claim 17 in which the impellers are disposed in overlapping relation.

19. The method as defined in claim 11 in which the impellers rotate in the same direction.

20. The method as defined in claim 11 in which the outlet closure substantially conforms to the rotational profile of the impellers.