Plastic bottle for a pressurized dispensing system

Patent metadata

Field	Value
Publication number	US-10486891-B2
Application number	US-201615367678-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Dec 2, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A plastic bottle for containing a product under pressure, such as a product to be dispensed as an aerosol. The plastic bottle includes a rounded base, a body extending about an axis of the bottle from the base towards a top end of the bottle, and a finish at the top end of the bottle. The base and the finish are configured to eliminate or to reduce undesirable properties such as bursting, splintering when dropped, and stress cracking.

First claim

We claim:

1. A plastic bottle for containing a product under pressure, the plastic bottle comprising:
(a) a rounded base at a bottom end of the bottle, the rounded base being convex towards the outside of the bottle;
(b) a body extending about an axis of the bottle from the base towards a top end of the bottle; and
(c) a finish at a top end of the bottle, the finish extending about the axis of the bottle, the finish including a first ring extending outwardly from an outer surface of the finish and a second ring extending outwardly from the outer surface of the finish and positioned below the first ring, the finish also including an inner surface that includes (i) a first section extending substantially parallel to the axis of the bottle, and (ii) a second section below the first section, with the second section being sloped inwards and downwards toward the axis of the bottle, and with the second section extending from a position corresponding to the second ring to a position below the second ring,
wherein the plastic bottle is configured such that the product can be dispensed as an aerosol.

2. The plastic bottle according to claim 1 , wherein the inner surface includes a third section below the second section, with the third section sloping outwards from the axis of the bottle.

3. The plastic bottle according to claim 2 , wherein a slope of at least a portion of the third section is about 0.35 mm/mm.

4. The plastic bottle according to claim 2 , wherein at least a portion of the third section has a ratio of weight to length along the bottle of about 0.25 g/mm.

5. The plastic bottle according to claim 1 , wherein the bottle is made from polyethylene terephthalate (PET).

6. A plastic bottle for containing a product under pressure, the plastic bottle comprising:
(a) a rounded base at a bottom end of the bottle, the rounded base being convex towards the outside of the bottle, and the base being thickest at a position including an axis of the bottle, with the thickness decreasing at a rate of about 3.8 mm per mm along the base from the axis of the bottle;
(b) a body extending about the axis of the bottle from the base towards a top end of the bottle; and
(c) a finish at the top end of the bottle, the finish extending about the axis of the bottle,
wherein the plastic bottle is configured such that the product can be dispensed as an aerosol.

7. The plastic bottle according to claim 6 , wherein, in a falling dart test conducted in accordance with ASTM D3763, using a striker with (i) a capacity of 8.720 kN, (ii) a mass of 2.551 kg, (iii) a diameter of 12.7 mm, (iv) a velocity of 4.40 m/s, and (v) a working range of up to 1.453 kN, the base has a peak force at fracture of at least about 450 N.

8. The plastic bottle according to claim 7 , wherein the peak force at fracture of the base is between about 450 N and about 700 N.

9. The plastic bottle according to claim 6 , wherein the bottle is made from polyethylene terephthalate (PET).

10. A plastic bottle for containing a product under pressure, the plastic bottle comprising:
(a) a finish at a top end of the bottle, the finish extending about an axis of the bottle;
(b) a body extending about the axis of the bottle from the finish towards a bottom end of the bottle; and
(c) a rounded base at the bottom end of the bottle, the rounded base being convex towards the outside of the bottle, and the base being thickest at a position including the axis of the bottle, wherein, if the base is divided into three equal sections between a position corresponding to the axis of the bottle and a position adjacent to the body of the bottle, a first section including the axis bottle is about 20% of the total weight of the base, a second section adjacent to the first section is about 45% of the total weight of the base, and a third section adjacent to the body of the bottle is about 35% of the total weight of the base,
wherein the plastic bottle is configured such that the product can be dispensed as an aerosol.

11. The plastic bottle according to claim 10 , wherein the first section corresponds to about 10% of the total outer surface area of the base, the second section corresponds to about 30% of the total outer surface area of the base, and the third section corresponds to about 60% of the total outer surface area of the base.

12. The plastic bottle according to claim 10 , wherein, in a falling dart test conducted in accordance with ASTM D3763, using a striker with (i) a capacity of 8.720 kN, (ii) a mass of 2.551 kg, (iii) a diameter of 12.7 mm, (iv) a velocity of 4.40 m/s, and (v) a working range of up to 1.453 kN, the base has a peak force at fracture of at least about 450 N.

13. The plastic bottle according to claim 12 , wherein the peak force at fracture of the base is between about 450 N and about 700 N.

14. The plastic bottle according to claim 10 , wherein the bottle is made from polyethylene terephthalate (PET).

15. A plastic bottle for containing a product under pressure, the plastic bottle comprising:
(a) a rounded base at a bottom end of the bottle, the rounded base being convex towards the outside of the bottle, and the base being thickest at a position including an axis of the bottle, with the thickness decreasing at a rate of about 3.8 mm per mm along the base from the axis of the bottle;
(b) a body extending about the axis of the bottle from the base towards a top end of the bottle; and
(c) a finish at a top end of the bottle, the finish extending about the axis of the bottle, the finish including an inner surface that includes (i) a first section adjacent to the top end of bottle, the first section extending substantially parallel to the axis of the bottle, and (ii) a second section below the first section, the second section being sloped inwards toward the axis of the bottle,
wherein the plastic bottle is configured such that the product can be dispensed as an aerosol.

16. The plastic bottle according to claim 15 , wherein the inner surface in the finish of the bottle includes a third section below the second section, with the third section sloping outwards from the axis of the bottle.

17. The plastic bottle according to claim 15 , wherein the bottle further comprises a ring extending from an outer surface of the finish, and
wherein the second section of the inner surface begins at a position corresponding to the ring.

18. The plastic bottle according to claim 15 , wherein, if the base is divided into three equal sections between a position corresponding to the axis of the bottle and a position adjacent to the body of the bottle, a first section including the axis bottle is about 20% of the total weight of the base, a second section adjacent to the first section is about 45% of the total weight of the base, and a third section adjacent to the body of the bottle is about 35% of the total weight of the base.

19. The plastic bottle according to claim 15 , wherein the bottle is made from polyethylene terephthalate (PET).

Assignees

• Johnson & Son Inc S C

Inventors

• Wolak Christopher P
• Stenmark Niles
• Harris Kimberly J
• Prater Rodney L
• Mcgrath Daniel S

Classifications

• B65D1/0261

  Bottom construction (B65D1/06 takes precedence) · CPC title

• B65D83/14

  Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant · CPC title

• B65D83/38 Primary

  Details of the container body (pressure relief devices B65D83/70) · CPC title