[특허]Pressure container with differential vacuum panels

Melrose, David Murray

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Pressure container with differential vacuum panels

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65D-023/10 B65D-001/02 B65D-079/00
출원번호	US-0106703 (2013-12-13)
등록번호	US-10005583 (2018-06-26)
우선권정보	NZ-535772 (2004-09-30); NZ-554532 (2007-04-13)
발명자 / 주소	Melrose, David Murray
출원인 / 주소	Melrose, David Murray
대리인 / 주소	Henricks, Slavin & Holmes LLP
인용정보	피인용 횟수 : 0 인용 특허 : 62

초록

A plastic container (1) has a first set of flex panels (2) and a second set of flex panels (3) one set being adapted to react to pressure changes within the container to a different degree than the other set. This can be achieved by different curvature and/or size and/or different distance from a central longitudinal axis of the container. At least one of the panels has at least two different extents of curvature. In some embodiments one or more of the panels may be flat.

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1. A container for accommodating volume contraction within the container after being filled with a heated liquid, having a sidewall portion including four vacuum flex panels spaced apart around the circumference of a body portion, and arranged as a first pair of opposed vacuum flex panels and a second pair of opposed vacuum flex panels, at least one of said vacuum flex panels having at least two different extents of curvature, and a plurality of vertical posts disposed between and joining respective adjacent panels, wherein the panels in at least one pair of the first and second pairs of panels vary in outward curvature along their length and are vertically concave, wherein the vacuum flex panels can deform inwardly to accommodate vacuum pressure caused by volume contraction of the heated liquid and wherein the vacuum flex panels are formed so the first pair of vacuum flex panels deforms inwardly at a different rate than the second pair of vacuum flex panels, wherein the second pair of panels are vertically concave and disposed between the first pair of panels by the posts or by land areas or by vertical transition transitional walls. 2. The container of claim 1 wherein one said pair of panels has a different amount of outward curvature to the other said pair of panels. 3. The container of claim 1 wherein one said pair of panels is substantially flat in the at least one region. 4. The container of claim 1 wherein one said pair of panels has a variable outward curvature. 5. The container of claim 1 wherein one said pair of panels has a generally even outward radius of curvature, excluding any ribs or grip features on said panels. 6. The container of claim 5 wherein one said pair of panels has a variable outward projection. 7. The container of claim 6 wherein a substantially central section of said panels projects outward to a lesser extent. 8. The plastic container of claim 1, said sidewall portion having a maximum outer diameter, and wherein said sidewall portion further comprises: at least one panel of said at least one pair of vacuum panels having a first substantially constant radius of curvature as measured in a horizontal plane, said first substantially constant radius of curvature being substantially constant from an upper end of each of said respective vacuum panels to a lower end, and wherein said first substantially constant radius of curvature is less than said maximum outer diameter; and, at least one of said pair of vacuum panels including gripping structure. 9. The plastic container of claim 1, said sidewall portion having a maximum outer diameter, and wherein said sidewall portion further includes at least one pair of said first and second pairs of vacuum panels each having a first substantially constant radius of curvature as measured in a horizontal plane, said first substantially constant radius of curvature being substantially constant from an upper end portion of each of said respective vacuum panels to a lower end portion, and wherein said first substantially constant radius of curvature is less than said maximum outer diameter; and, at least one of said pair of vacuum panels including gripping structure. 10. A plastic container according to claim 9, wherein said gripping structure comprises at least one protruding rib defined in at least one of said second vacuum panels. 11. The plastic container of claim 1, wherein said sidewall portion further includes one pair of the first and second pairs of opposing vacuum panels having a different radius of curvature to the other pair, at least one panel of said second pair of vacuum panels including gripping structure and being shaped so as to be symmetric about a plane through the at least one of said second vacuum panels when viewed in side elevation. 12. A plastic container according to claim 11, wherein said at least one of said second vacuum panels is further shaped so as to have a width as viewed in side elevation at a first end that is the same as that at a second end. 13. A plastic container according to claim 11, wherein said gripping structure comprises at least one protruding rib defined in at least one of said second vacuum panels. 14. A plastic container according to claim 13, wherein said gripping structure comprises a plurality of said protruding ribs, and wherein said protruding ribs are oriented substantially horizontally as viewed in side elevation. 15. A plastic container according to claim 14, wherein said protruding ribs are not all of equal width. 16. The plastic container of claim 1, said sidewall portion having a maximum outer diameter, and wherein said sidewall portion further comprises:said first pair of opposing vacuum panels each having a first substantially constant radius of curvature as measured in a horizontal plane; said first substantially constant radius of curvature being substantially constant from an upper end of each of said respective vacuum panels to a lower end, and wherein said first substantially constant radius of curvature is less than said maximum outer diameter; andat least one of said second pair of vacuum panels having gripping structure and having a different radius of curvature as measured in the horizontal plane to the radius of curvature of the other pair of vacuum panels. 17. A plastic container according to claim 16, wherein said second radius of curvature is substantially constant, excluding any gripping structure, from an upper end of each of said respective second vacuum panels to a lower end. 18. A plastic container according to claim 16, wherein said gripping structure comprises at least one protruding rib defined in at least one of said second vacuum panels. 19. A plastic container according to claim 17, wherein said second different radius of curvature is less than said maximum outer diameter. 20. A plastic container having a central longitudinal axis and a body portion including a sidewall wherein said body portion includes: a first pair of controlled deflection flex panels on opposed sidewall portions, anda second pair of controlled deflection flex panels on second opposed sidewall portions, at least one of said controlled deflection flex panels having at least two different extents of outward curvature, and a plurality of vertical posts disposed between and joining respective adjacent panels, wherein the panels in at least one pair of the first and second pairs of panels vary in outward curvature along their length and are vertically concave,said first pair of controlled deflection flex panels being adapted to react to internal pressure changes and move inwardly within the container, said second pair of controlled deflection flex panels being adapted to react to internal pressure changes and move inwardly within the container, wherein the first pair of controlled deflection flex panels react to a different degree to the second pair of controlled deflection flex panels, wherein the second pair of panels are vertically concave and disposed between the first pair of panels by the posts or by land areas or by vertical transition transitional walls. 21. The plastic container of claim 20 wherein each of the controlled deflection flex panel of the first pair has a width which is less than the width of the controlled deflection flex panels of the second pair. 22. The plastic container of claim 20 wherein each of the controlled deflection flex panels of the second pair has one or a plurality of ribs incorporated within. 23. The plastic container of claim 22 wherein at least one, of said sidewall portions is symmetrical to an opposing side wall portion relative to rib and flex panel placement, size and number. 24. The plastic container of claim 23 wherein a cage structure of ribs and flex panels cooperate to maintain container shape upon filling and cooling of the container. 25. The plastic container of claim 20 wherein the controlled deflection flex panels of the first and second flex panel pairs are adapted to react to pressure changes to a different degree by being of a different size and/or different distance from the central longitudinal axis of the container and/or having a different curvature. 26. The plastic container of claim 20 wherein the container is hot-fillable. 27. The plastic container of claim 20 including a base which is rounded. 28. The plastic container of claims 20 or 21, wherein the opposite controlled deflection flex panels of the first pair each comprise the at least two different extents of outward curvature and the adjacent pair of opposite controlled deflection flex panels of the second pair also each comprise at least two different extents of outward curvature. 29. The plastic container of claim 20 wherein at least one controlled deflection flex panel pair has one or a plurality of ribs incorporated within. 30. The plastic container of claim 22 or 29 wherein the said ribs include either an outward or inwardly facing rounded edge, relative to the interior of the container. 31. The plastic container of claim 30 wherein said ribs are parallel to each other. 32. The plastic container of claim 20 wherein the controlled deflection flex panel having the at least two different extents of outward curvature has a region of generally outward transverse curvature that projects away from the longitudinal axis of the container to a lesser extent than an upper or lower region of the panel. 33. The plastic container of claim 32 wherein the region of generally outward transverse curvature that is less outwardly projecting and acts as an initiating region reacts to changing pressure within the container at a lower threshold than a second region which is more outwardly projecting curved. 34. The plastic container of claim 20 wherein the controlled deflection flex panel having the at least two different extents of outward curvature has a region that inverts under vacuum pressure. 35. The container of either of claim 20 or claim 1 wherein said at least two different extents of curvature comprise varying amounts of projection from a plane defined by a longitudinal axis of said at least one panel. 36. The container of claim 35 wherein a substantially constant arc of curvature is provided along said longitudinal axis of said at least one panel. 37. The container of claim 35 wherein a variable arc of curvature is provided along said longitudinal axis of said at least one panel. 38. A container for accommodating volume contraction within the container after being filled with a heated liquid, having a sidewall portion including four vacuum flex panels spaced apart around the circumference of a body portion, and arranged as a first pair of opposed vacuum flex panels and a second pair of opposed vacuum flex panels, at least one of said vacuum flex panels having at least two different extents of curvature, and a plurality of vertical posts disposed between and joining respective adjacent panels, wherein the panels in at least one pair of the first and second pairs of panels vary in outward curvature along their length and are vertically concave, wherein the vacuum flex panels can deform inwardly to accommodate vacuum pressure caused by volume contraction of the heated liquid and wherein the vacuum flex panels are formed so the first pair of vacuum flex panels deforms inwardly at a different rate than the second pair of vacuum flex panels, the container further comprising upper and lower container bumpers, wherein the second pair of panels are recessed with respect to the upper and lower container bumpers; and wherein said second pair of panels include horizontal ribs. 39. A plastic container having a central longitudinal axis and a body portion including a sidewall wherein said body portion includes: a first pair of controlled deflection flex panels on opposed sidewall portions, anda second pair of controlled deflection flex panels on second opposed sidewall portions, at least one of said controlled deflection flex panels having at least two different extents of outward curvature, and a plurality of vertical posts disposed between and joining respective adjacent panels, wherein the panels in at least one pair of the first and second pairs of panels vary in outward curvature along their length and are vertically concave,said first pair of controlled deflection flex panels being adapted to react to internal pressure changes and move inwardly within the container, said second pair of controlled deflection flex panels being adapted to react to internal pressure changes and move inwardly within the container, wherein the first pair of controlled deflection flex panels react to a different degree to the second pair of controlled deflection flex panels, the container further comprising upper and lower container bumpers, wherein the second pair of panels are recessed with respect to the upper and lower container bumpers; and wherein said second pair of panels include horizontal ribs. 40. A container as claimed in either of claim 39 or 38, wherein the second pair of panels are vertically concave and disposed between the first pair of panels by the posts or by land areas or by vertical transition transitional walls.

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