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1. WO2021007591 - MULTI-COMPOSITION PRODUCT DISPENSER

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

What is claimed is:

1. A product dispenser (1) capable of concurrently dispensing at least a first composition (18) and a second composition (20) comprising:

(a) a first container (21) for containing the first composition (18) and a second container (19) for containing the second composition (20);

(b) a multi-composition flow director (31) comprising:

(i) a first flow director cavity (38) in fluid communication with the first container (21);

(ii) a second flow director cavity (48) in fluid communication with the second container

(19);

(iii) an inner flow director sealing ring (52) positioned between the first flow director cavity (38) and second flow director cavity (48);

(iv) an outer flow director sealing ring (65) opposing said inner flow director sealing ring (52) along an inner/outer flow director sealing ring longitudinal axis (60);

(c) a nozzle (70) comprising:

(i) an inner nozzle conduit (71) in fluid communication with the second flow director cavity (48) and fluidly sealed against the inner flow director sealing ring (52);

(ii) an outer nozzle conduit (81), at least partially extending around the inner conduit (71), in fluid communication with the first flow director cavity (38) and fluidly sealed against the outer flow director sealing ring (65);

(iii) wherein the length of the inner conduit (71) is longer than the length of the outer conduit (81).

2. The product dispenser (1) of claim 1, wherein the fluid seal between the inner nozzle conduit (71) and the inner flow director sealing ring (52) is formed between an inner nozzle conduit outer circumferential surface (82) and an inner flow director sealing ring inner circumferential surface (55).

3. The product dispenser (1) of any one of the preceding claims, wherein from 3% to 30%, preferably from 5% to 25%, more preferably 10% to 20%, of the total length of the nozzle (70), measured along a nozzle longitudinal axis (80), forms the fluid seal between the inner nozzle conduit (71) and the inner flow director sealing ring (52).

4. The product dispenser (1) of any one of the preceding claims, wherein the fluid seal of the outer nozzle conduit (81) and the outer flow director sealing ring (65) is formed between an outer nozzle conduit outer circumferential surface (86) and an outer flow director sealing ring inner circumferential surface (36).

5. The product dispenser (1) of any one of the preceding claims, wherein from 10% to 50%, preferably from 20% to 40%, more preferably from 25% to 35%, of the total length of the nozzle (70), measured along a nozzle longitudinal axis (80), forms the fluid seal between the outer nozzle conduit (81) and the outer flow director sealing ring (65);

optionally the fluid seal of the outer nozzle conduit (81) and the outer flow director sealing ring (65) is formed to include at least a midpoint of the total length of the nozzle (70), said length measured along a nozzle longitudinal axis (80).

6. The product dispenser (1) of any one of the preceding claims, wherein the length of the outer nozzle conduit (81) is from 30% to 99%, preferably from 40% to 90%, more preferably from 50% to 80%, of the length of the inner nozzle conduit (71).

7. The product dispenser (1) of any one of the preceding claims, wherein the outer flow director sealing ring (65) further comprises an abutment ring portion (57) circumferentially protruding inward narrowing the cross-sectional area relative to a non-abutment ring portion (not shown) of the outer flow director sealing ring (65);

preferably said abutment ring portion (57) is proximate to the first flow director cavity (38).

8. The product dispenser (1) of claim 7, wherein the thickness of the abutment ring portion (57) is equal to or less than the cross-sectional thickness of an outer nozzle conduit (81) outer wall of the outer nozzle conduit (81 ) abutting the abutment ring portion (57).

9. The product dispenser (1) of claim 7 or 8, wherein the cross sectional opening of the inner flow director sealing ring (52) is less than, preferably 70% to 99%, more preferably 75% to 98%, yet more preferably 80% to 97%, of the cross sectional opening of the abutment ring portion (57) of the outer flow director sealing ring (65).

10. The product dispenser (1) of claim 7, 8, or 9, wherein the abutment ring portion (57) of the outer flow director sealing ring (65) is less than, preferably 70% to 99%, more preferably 75% to 98%, yet more preferably 80% to 97%, of the cross sectional opening of a non-abutment ring portion (not shown) of the outer flow director sealing ring (65).

11. The product dispenser (1) of claim 10, wherein said non-abutment ring portion is distal to the first flow director cavity (38) relative to said abutment ring portion (57).

12. The product dispenser (1) of any one of the claims 7-11, wherein the cross-sectional shape of the abutment ring portion (57) of the outer flow director sealing ring (65), the non-abutment ring portion of the outer flow director sealing ring (65), and the inner flow director sealing ring (52) are each independently selected from a circular or oval.

13. The product dispenser (1) of any one of the preceding claims, wherein the outer nozzle conduit (81) at least partially extends, preferably fully extends, circumferentially around the inner nozzle conduit (71).

14. The product dispenser (1) of any one of the preceding claims, wherein the first flow cavity director cavity further comprises a circular segmental channel (68) along the inner/outer flow director sealing ring longitudinal axis (60);

preferably wherein a cross section of the circular segmental channel in a plane orthogonal to and relative to the inner/outer flow director sealing ring longitudinal axis (60), is at least 1 radian, preferably 1 radian to 4 radians, more preferably from 2 to 4 radians.

15. The product dispenser (1) of any one of the preceding claims, wherein:

(a) the first flow director cavity (38) further comprises a first cavity inlet planar opening (34), wherein the first cavity inlet planar opening (34) comprises a first cavity inlet planar opening centroid (35), wherein a first cavity inlet axis (36) orthogonally intersects said first cavity inlet planar opening centroid (35);

(b) the second flow director cavity (48) comprises a second cavity inlet planar opening (44), wherein the second cavity inlet planar opening (44) comprises a second cavity inlet planar opening centroid (45), wherein a second cavity inlet axis (46) orthogonally intersects said second cavity inlet planar opening centroid (45);

(c) a nozzle longitudinal axis (80) along the nozzle (70); and

(d) wherein an inlet intersecting plane (26) intersects the first cavity inlet axis (36) and the second cavity inlet axis (46), and the nozzle longitudinal axis (80) intersects said plane to form an angle from 60 degrees to 90 degrees, preferably 90 degrees;

(e) optionally:

wherein the first composition (18) is contained in the first container (21), and the second composition (20) is contained in the second container (19), wherein the viscosity of at least either the first composition (18) or the second composition (20), preferably at least the second composition (20), more preferably the first and second compositions (18, 20), each independently have a Crossover Stress assessed by a Portion Oscillatory Rheometry Test Method (“PORTM”) as described herein, wherein the Crossover Stress of first and second compositions (18, 20) are each independent equal to or greater than 10 Pascals (Pa), preferably from 10 Pa to 120 Pa, more preferably from 10 to 80 Pa, even more preferably from 15 to 50 Pa;

preferably the viscosity of the first composition (18) and the second composition (20) are within 25% of each other, preferably within 20%, more preferably within 15%, yet more preferably within 10%, yet still more preferably within 5% of each other;

more preferably the first composition (18) and second compositions (20) are each skin care compositions.