Wick-positioning cartomizer

• US 10,660,366 B2
• Filed: 01/29/2016
• Issued: 05/26/2020
• Est. Priority Date: 01/30/2015
• Status: Active Grant

• Current Assignee: Fontem Ventures BV (Imperial Tobacco Group PLC)
• Original Assignee: Fontem Holdings 4 B.V. (Imperial Tobacco Group PLC)
• Inventors: Alarcon, Ramon
• Primary Examiner(s): Ross, Dana
• Assistant Examiner(s): Mills, Jr., Joe E
• Application Number:
  US15/011,027
• Publication Number:
  US 20160219936A1
• Time in Patent Office: 1,579 Days
• Field of Search: 392395, 131328, 131329
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/44 Wicks
• CPC Class Codes: A24F 40/46 Shape or structure of electric heating means
• CPC Class Codes: A24F 40/485 Valves; Apertures
• CPC Class Codes: H05B 3/0014 Devices wherein the heating current flows through particular resistances
• CPC Class Codes: H05B 3/12 characterised by the composition or nature of the conductive material

Abstract

A cartomizer of an electronic smoking article comprises a partially slit air tube configured to position a heater coil surrounding a wick.

Claims

1. A cartomizer comprising:

an air tube extending longitudinally within a housing, the air tube comprising a proximal end, a distal end, and a central longitudinal axis;

a heater coil positioned within the air tube;

a wick including a wick portion configured to be held and surrounded by the heater coil;

and a movable secondary sleeve surrounding the heater coil and the wick portion;

wherein the air tube further comprises a slit leading to an aperture configured to position the heater coil; and

wherein the heater coil is positioned within the aperture such that the wick portion does not come into contact with the air tube.

2. The cartomizer of claim 1, wherein the heater coil is positioned along the central longitudinal axis of the air tube.

3. The cartomizer of claim 1, wherein the wick is configured to extend from a first end of the heater coil and from a second end of the heater coil;

wherein the wick is configured to contact a liquid within an electronic smoking article; and

wherein the wick is configured to avoid contact with an inner wall of the air tube.

4. The cartomizer of claim 1, wherein the air tube comprises a flexible, heat-resistant material.

5. The cartomizer of claim 4, wherein the air tube comprises at least one of the following materials:

woven fiberglass, plastic, aramid fibers, and silicone.

6. The cartomizer of claim 1, wherein the heater coil comprises a resistive metallic material.

7. The cartomizer of claim 6, wherein the heater coil comprises at least one of the following materials:

nichrome wire and kanthal.

8. The cartomizer of claim 1, wherein the heater coil comprises between about 5 and about 8 coil turns.

9. The cartomizer of claim 1, wherein the heater coil is about 2.6 mm in length.

10. The cartomizer of claim 1, wherein the heater coil is connected to a battery or to control circuitry of an electronic cigarette via a crimped connection.

11. The cartomizer of claim 1, wherein the slit of the air tube comprises at least one of the following:

an opening that is perpendicular to a central longitudinal axis of the air tube, an opening that is parallel to the central longitudinal axis of the air tube, and an opening that is angled between about 0 degrees and about 90 degrees with respect to the central longitudinal axis of the air tube.

12. The cartomizer of claim 1, wherein the movable secondary sleeve is configured to surround the slit and the aperture in the air tube and to maintain the integrity of the air tube.

13. The cartomizer of claim 1, wherein the slit is located midway between the proximal end and the distal end of the air tube.

14. The cartomizer of claim 1, wherein the slit is located adjacent to the proximal end of the air tube.

15. The cartomizer of claim 1, wherein the slit is located adjacent to the distal end of the air tube.

16. The cartomizer of claim 1, wherein the wick comprises at least one of the following:

silica, metal mesh, fiberglass, cotton, ceramic-coated fiberglass, ceramic-coated silica, and plastic.

17. The cartomizer of claim 1, wherein the wick is between about 1 cm and about 5 cm long.

18. The cartomizer of claim 1, wherein the heater coil is further configured to compress a diameter of the wick.

19. An electronic smoking article comprising

a cartomizer comprising (i) an air tube extending longitudinally within a housing, the air tube comprising a proximal end, a distal end, and a central longitudinal axis, (ii) a heater coil positioned within the air tube, iii) a wick including a wick portion configured to be held and surrounded by the heater coil, and iv) a movable secondary sleeve surrounding the heater coil and the wick portion;

wherein the air tube further comprises a slit leading to an aperture configured to position the heater coil; and

wherein the heater coil is positioned within the aperture such that the wick portion does not come into contact with the air tube; and

a battery part configured to be coupled with the cartomizer.