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1. WO2020115146 - MOUTHPIECE WITH INNER AND OUTER TUBULAR SECTIONS

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[ EN ]

CLAIMS

1. Mouthpiece for attachment to a hollow tubular filter portion of an aerosol generating article, wherein the mouthpiece comprises an inner tubular section having a minimum outer diameter which is smaller than an inner diameter of the hollow tubular filter portion of the aerosol-generating article, and wherein the mouthpiece comprises an outer tubular section having a maximum inner diameter which is larger than an outer diameter of the aerosol-generating article wherein the mouthpiece comprises a central airflow channel arranged along the longitudinal axis of the mouthpiece, wherein the airflow channel comprises a Venturi portion, wherein the Venturi portion comprises an inlet portion, an optional central portion and an outlet portion, wherein the inlet portion is configured converging in a downstream direction and the outlet portion is configured diverging in a downstream direction.

2. Mouthpiece according to claim 1 , wherein the mouthpiece comprises a stop arranged connecting the inner tubular section and the outer tubular section.

3. Mouthpiece according to claim 2, wherein the stop is configured to enable a maximum insertion of the inner tubular section of the mouthpiece into the hollow tubular filter portion of the aerosol-generating article of 6 millimeters, preferably 5 millimeters, more preferably around 4 millimeters.

4. Mouthpiece according to any one of the preceding claims, wherein the inner tubular section has an outer diameter of between 3 millimeters and 5 millimeters, preferably between 3.5 millimeters and 4.5 millimeters, more preferably around 4 millimeters.

5. Mouthpiece according to any one of the preceding claims, wherein the outer tubular section has an inner diameter of between 5 millimeters and 8 millimeters, preferably between 5.5 millimeters and 7 millimeters, more preferably around 6.3 millimeters.

6. Mouthpiece according to any one of the preceding claims, wherein the inner tubular section comprises an upstream end, and wherein the outer circumference of the upstream end of the inner tubular section is rounded.

7. Mouthpiece according to any one of the preceding claims, wherein the outer tubular section comprises an upstream end, and wherein the inner circumference of the upstream end of the outer tubular section is tapered.

8. Mouthpiece according to any one of the preceding claims, wherein the outer circumference of the inner tubular section is conical, and wherein the outer diameter of the inner tubular section increases towards a downstream direction.

9. Mouthpiece according to any one of the preceding claims, wherein the inner circumference of the outer tubular section is conical, and wherein the inner diameter of the outer tubular section decreases towards a downstream direction.

10. Mouthpiece according to any one of the preceding claims, wherein the inner tubular section and the outer tubular section of the mouthpiece are configured to form a tubular slot between the inner tubular section and the outer tubular section, and wherein the tubular slot is configured to securely receive and hold the hollow tubular filter portion of the aerosol-generating article.

11. Mouthpiece according to any one of the preceding claims, wherein the mouthpiece comprises a hinge section for attachment of the mouthpiece to an aerosol generating device.

12. System comprising a mouthpiece according to any one of claims 1 to 1 1 and an aerosol-generating article, wherein the aerosol-generating article comprises a substrate portion containing aerosol-forming substrate and a hollow tubular filter portion, wherein a minimum outer diameter of the inner tubular section of the mouthpiece is smaller than an inner diameter of the hollow tubular filter portion of the aerosol-generating article, and wherein a maximum inner diameter of the outer tubular section of the mouthpiece is larger than an outer diameter of the aerosol-generating article.

13. Method for attaching a mouthpiece to a hollow tubular filter portion of an aerosol-generating article, wherein the method comprises:

i. providing a mouthpiece according to any one of claims 1 to 1 1 ,

ii. providing the aerosol-generating article comprising a substrate portion containing aerosol-forming substrate and the hollow tubular filter portion,

iii. attaching the mouthpiece to the hollow tubular filter portion of the aerosol generating article by inserting the inner tubular section of the mouthpiece into the hollow tubular filter portion of the aerosol-generating article.