Product portion enrobing process and apparatus, and resulting products

• US 9,462,827 B2
• Filed: 03/14/2014
• Issued: 10/11/2016
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Altria Client Services LLC (Altria Group, Inc.)
• Original Assignee: Altria Client Services LLC (Altria Group, Inc.)
• Inventors: Carroll, Andrew Nathan, Black, Shannon Maxwell, Sun, Yan Helen, Burke, William J., Smith, Robert
• Primary Examiner(s): CALANDRA, ANTHONY J
• Application Number:
  US14/213,317
• Publication Number:
  US 20140261484A1
• Time in Patent Office: 942 Days
• US Class Current: 1/1
• CPC Class Codes: A24B 13/00 Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff reconstituted tobacco products A24B3/14
• CPC Class Codes: A24B 15/14 made of tobacco and a binding agent not derived from tobacco
• CPC Class Codes: A24B 15/186 by coating with a coating composition, encapsulation of tobacco particles encapsulation of additives other than tobacco : A24B15/283
• CPC Class Codes: A24B 15/28 by chemical substances
• CPC Class Codes: A24B 15/283 by encapsulation of the chemical substances
• CPC Class Codes: A24B 15/302 by natural substances obtained from animals or plants
• CPC Class Codes: A24B 15/403 having only oxygen as hetero atoms
• CPC Class Codes: A24B 3/14 Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products delustering A24C1/40
• CPC Class Codes: A24F 23/02 Tobacco pouches
• CPC Class Codes: B05B 13/0221 characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts B05B13/0207 takes precedence; conveyors in general B65G
• CPC Class Codes: B65G 15/24 in tandem
• CPC Class Codes: B65G 15/44 for impelling the loads
• CPC Class Codes: B65G 51/02 Directly conveying the articles, e.g. slips, sheets, stockings, containers or workpieces, by flowing gases
• CPC Class Codes: D01D 11/06 Coating with spinning solutions or melts
• CPC Class Codes: D01D 5/0084 Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
• CPC Class Codes: D01D 5/0985 by means of a flowing gas (e.g. melt-blowing)
• CPC Class Codes: D01D 5/18 by means of rotating spinnerets
• CPC Class Codes: D04H 13/00 Other non-woven fabrics
• CPC Class Codes: D04H 13/001 Making non-woven fabrics from staple fibres, filaments or yarns, bonded to at least one web-like material, e.g. woven, knitted non-woven fabric, paper, leather, during consolidation

Abstract

A method of enrobing a product portion in polymer strands includes mounting at least one product portion on a holding device and passing the at least one product portion through a polymer enrobing zone. The polymer enrobing zone can include a flow of polymeric fibers produced by a polymer spray head. The polymer fibers can wraparound the at least one product portion to produce an enrobed product portion. The holding device can hold the at least one product portion by passing at least partially through the body of the product portion. At least a portion of the holding device is removed from the enrobed product portion. In some cases, the at least one product portion includes smokeless tobacco.

Claims

1. A method of enrobing a product portion in polymer strands comprising:

mounting at least one product portion on a holding device, the holding device passing at least partially through a body of said at least one product portion;

producing a flow of polymeric fibers from a polymer spray head to create a polymer enrobing zone;

moving said holding device to pass said at least one product portion through said polymer enrobing zone such that a plurality of said polymeric fibers wraparound said at least one product portion to produce an enrobed product portion;

applying an electrostatic charge with the holding device to the plurality of said polymeric fibers, said at least one product portion, or a combination thereof; and

removing at least a portion of said holding device.

2. The method of claim 1, wherein the holding device is a needle that passes at least partially through said body of said at least one product portion.

3. The method of claim 2, wherein said needle passes entirely through said body of said at least one product portion.

4. The method of claim 2, wherein said needle is entirely removed from said enrobed product portion.

5. The method of claim 2, wherein said needle is metal.

6. The method of claim 2, wherein said needle is heated before or during said passing of said at least one product portion through said polymer enrobing zone.

7. The method of claim 1, wherein mounting the at least one product portion on said holding device comprises forming the at least one product portion around said holding device.

8. The method of claim 1, wherein said passing said at least one product portion through said polymer enrobing zone comprises rotating said at least one product portion.

9. The method of claim 1, wherein said passing said at least one product portion through said polymer enrobing zone comprises changing the orientation of said at least one product portion.

10. The method of claim 1, further comprising collecting at least some of said plurality of polymeric fibers on a polymer collection roller positioned opposite said polymer enrobing zone.

11. The method of one of claim 1, wherein said at least one product portion comprises a consumable product.

12. The method of claim 11, wherein said at least one product portion comprises tobacco.

13. The method of claim 12, wherein said at least one product portion comprises smokeless tobacco.

14. The method of claim 11, wherein said at least one product portion has an overall oven volatiles content of about 4% by weight to about 61% by weight.

15. The method of claim 11, wherein said at least one product portion comprises a binder.

16. The method of claim 15, wherein said at least one product portion comprises between 0.1 and 0.5 weight percent of a binder.

17. The method of claim 15, wherein the binder comprises guar gum, xanthan gum, cellulose gum, or a combination thereof.

18. The method of claim 1, wherein a surfactant is applied to the plurality of polymeric fibers as they exit the polymer spray head.

19. The method of claim 1, wherein the at least one product portion is enrobed in a covering of polymeric fibers while in said polymer enrobing zone having a basis weight of less than 40 gsm.

20. The method of claim 1, wherein the polymeric fibers enrobing said at least one product portion have a diameter of less than 100 microns.

21. The method of claim 20, wherein the polymeric fibers enrobing said at least one product portion have a diameter of less than 30 microns.

22. The method of claim 1, wherein the polymeric fibers are above a melt temperature for the polymer when impacting the at least one product portion such that they conform to structures on the exterior of said at least one product portion.

23. The method of claim 1, wherein the polymer spray head is a melt-blowing apparatus that melt-blows the polymeric fibers in an upward direction.

24. The method of claim 23, wherein the polymeric fibers are melt-blown polymeric fibers having a diameter of between 0.5 and 10.0 microns.

25. The method of claim 1, wherein the polymeric fibers are centrifugal force spun fibers having a diameter of between 0.01 microns and 1.0 micron.

26. The method of claim 24, wherein the melt-blown polymeric fibers are quenched below a melt temperature of the polymer upon impacting the body.

27. The method of claim 1, wherein the polymeric fibers comprise polypropylene.

28. The method of claim 1, wherein the polymeric fibers comprise polyurethane.

29. The method of claim 1, wherein the polymeric fibers comprise at least two different materials.

30. The method of claim 29, wherein the at least two different polymeric materials are coextruded to form composite polymeric fibers of the two polymeric materials.

31. The method of claim 29, wherein at least one of the polymeric materials is mouth-stable and at least one of the polymeric materials is mouth-dissolvable.

32. The method of claim 1, wherein the polymeric fibers comprise a colorant.