[특허]Systems for compensating for vacuum pressure changes within a plastic container

CO2 PAC LTD

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특허 상세정보

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Systems for compensating for vacuum pressure changes within a plastic container

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65B-003/02 B65D-001/46 B65B-007/28 B65B-061/24 B65D-001/02 B65D-079/00 B65D-001/42 B67C-007/00 B65B-003/04 B65B-063/08 B65D-023/10 B67B-003/20 B67C-003/22
출원번호	US-0142882 (2013-12-29)
등록번호	US-9878816 (2018-01-30)
우선권정보	NZ-521694 (2002-09-30)
발명자 / 주소	Melrose, David Kelley, Paul Denner, John
출원인 / 주소	CO2 PAC LTD
대리인 / 주소	Henricks, Slavin & Holmes LLP
인용정보	피인용 횟수 : 0 인용 특허 : 229

초록
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A plastic container comprises an upper portion including a finish adapted to receive a closure, a lower portion including a base, and a sidewall extending between the upper portion and the lower portion. The upper portion, the lower portion, and the sidewall define an interior volume for storing liquid contents. The plastic container further comprises a pressure panel located on the container and moveable between an initial position and an activated position. The pressure panel is located in the initial position prior to filling the container, and is moved to the activated position after filling and sealing the container. Moving the pressure panel from the initial position to the activated position reduces the internal volume of the container and creates a positive pressure inside the container. The positive pressure reinforces the sidewall. A method of processing a container is also disclosed.

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1. A system for handling containers, each said container having a longitudinal axis, an upper portion having an opening into the container, a body portion extending from the upper portion to a lower portion, the body portion including portions that are strengthened against deformation, said strengthened portions including a first concave hoop ring or rib structure and a second concave hoop ring or rib structure, and an annular sidewall portion that deforms inwardly and outwardly arranged between the first and the second concave hoop rings or ribs, the lower portion including a base, the base closing off an end of the container and providing a standing surface, the container having at least one substantially transversely oriented pressure panel located in the lower portion, wherein the pressure panel includes a portion inclined outwardly at an angle of greater than 10 degrees relative to a plane orthogonal to the longitudinal axis when in a first, outwardly inclined position, the pressure panel being adapted to be inverted and repositioned from a first position to a second position, the system comprising: filling means for filling the containers with a product, the product being at an elevated temperature;sealing means for sealing the filled containers using a cap;vacuum creating means for creating a vacuum in each of the filled and sealed containers by cooling;conveying means for conveying the containers having vacuums created therein with the pressure panel in the first position with the portion of the pressure panel inclined outwardly at an angle of greater than 10 degrees relative to a plane orthogonal to the longitudinal axis; andrepositioning means for repositioning the pressure panel from the first position with the portion of the pressure panel inclined outwardly at an angle of greater than 10 degrees relative to a plane orthogonal to the longitudinal axis to an inverted second position to reduce the vacuum, wherein the second position is toward the opening into the container; wherein the repositioning means comprises a mechanical pusher or the like to engage an inwardly recessed central portion of a centrally located push-up portion. 2. The system of claim 1, wherein the container body includes a portion that deforms inwardly and reduces a first portion of the vacuum pressure created during the cooling of the container. 3. The system of claim 2, wherein repositioning the pressure panel reduces a second portion of the vacuum pressure. 4. The system of claim 1, wherein the pressure panel comprises a centrally located push-up portion. 5. The system of claim 4 wherein the pressure panel is connected by a hinge to an instep recessed from the standing surface. 6. The system of claim 5, wherein the pressure panel is repositioned about the hinge element without substantial repositioning of the instep. 7. The system of claim 1 wherein the container is conveyed with the standing surface on a flat surface. 8. The system of claim 1, wherein the pressure panel extends between the standing surface and a centrally located push-up portion, wherein the pressure panel is circumscribed by an instep, wherein the instep is inwardly recessed from the standing surface to such an extent that the entire pressure panel is contained above the standing surface, and wherein the repositioning means engages with an inwardly recessed central portion of the push up portion above the level of the standing surface, and repositions the pressure panel about the instep substantially without repositioning the instep. 9. A system for processing a pre-formed plastic container filled with a hot product, the container having a longitudinal axis, the system comprising: hot filling means for filling a rigid container body of the pre-formed plastic container with the hot product in a production line, the rigid container body having a surface surrounding an interior of the rigid container body and having a closed base comprising a standing surface and a centrally located push-up portion configured to receive a mechanical device, the base also having a pressure panel that is invertible from an outwardly inclined position to an inwardly inclined position, the pressure panel extending between the standing surface and the push-up, wherein the pressure panel is circumscribed by a hinge, and wherein the pressure panel includes a portion inclined outwardly at an angle of greater than 10 degrees relative to a plane orthogonal to the longitudinal axis when in the outwardly inclined position;means for capping a neck of the filled rigid container body with a cap in the next operation of the production line;means for conveying through the production line the pre-formed plastic container having the pressure panel in the outward position;means for cooling the rigid container body of the pre-formed plastic container filled with the hot product; andmeans for pushing the pressure panel from the outwardly inclined position of the cooled rigid container body into the inwardly inclined position within the interior of the rigid container; wherein the means for pushing the pressure panel from the outwardly inclined position to the inwardly inclined position within the cooled container body is to position a mechanical rod or punch-like device underneath a container. 10. The system of claim 9, wherein the base includes an instep connected by the hinge structure to the outwardly inclined pressure panel before the filling begins. 11. The system of claim 10, wherein the instep is inwardly recessed from the standing surface to such an extent that the entire pressure panel is contained above the standing surface. 12. The system of claim 9, wherein a portion of the sidewall responds to vacuum pressure during cooling of the container, and pushing the base from the outwardly inclined position to the inwardly inclined position removes at least a portion of the vacuum pressure. 13. The system of claim 9, wherein the pressure panel is substantially transversely oriented, wherein the base includes an instep connected by the hinge to the pressure panel, and wherein the pushing means engages with an inwardly recessed central portion of the push up portion above the level of the standing surface, and repositions the pressure panel about the instep substantially without repositioning the instep. 14. A system comprising: a plurality of hot-filled and sealed plastic containers, each said plastic container including a body portion and a base portion, the base portion forming a support surface for supporting the container on a substantially flat surface and the base portion having a moveable element arranged at a bottom end thereof, wherein the moveable element includes a portion inclined outwardly at an angle of greater than 10 degrees relative to a plane orthogonal to the longitudinal axis when in a first, outwardly inclined position prior to filling, the moveable element being moveable substantially permanently to remove a vacuum in the container;a cooler to cool the plurality of hot-filled and sealed containers, said cooling creating a vacuum in each of the hot-filled and sealed containers, each said vacuum causing a temporary deformation of the corresponding container;a conveyor to convey the containers while temporarily compensating for the vacuums created therein and maintaining stable touch points; anda mechanical activator to activate, after the containers are conveyed, the moveable element of each said container, said activating including moving the moveable element from the first position to a second position substantially permanently to remove a portion of the vacuum, wherein the body portion of each said container includes a first hoop ring, a second hoop ring, and a smooth sidewall between the first and second hoop rings,wherein the conveyance of the containers is such that each said container is in contact with a plurality of other of said containers of said plurality, the first and the second hoop rings for each said container providing for substantially stable touch points for conveyance of the containers. 15. The system of claim 14, wherein the base portion has a recessed instep portion and said activator engages with an inwardly recessed portion of a push up portion above the support surface, and wherein said moving the moveable element is performed substantially without repositioning the instep. 16. A system for handling filled containers, the system comprising: a plurality of containers, each said container including a body and a base defining an inner volume, the body having a first annular portion, a second annular portion, and a sidewall portion, and the base portion having a moveable element arranged at a bottom end thereof, wherein the moveable element includes a portion inclined outwardly at an angle of greater than 10 degrees relative to a plane orthogonal to the longitudinal axis when in a first, outwardly inclined position;filling means for filling each of said containers with a product, the product being at an elevated temperature;capping means for capping and sealing each said filled container with a cap;cooling means for cooling each said filled and capped container, the cooling creating a vacuum in the container, the vacuum causing temporary distortion of the container, the temporary distortion occurring substantially at the sidewall portion, with the first annular portion and the second annular portion substantially resisting distortion; andhandling means for handling each said cooled container temporarily distorted to have one or more substantially stable touch points of the container in contact with corresponding one or more substantially stable touch points of at least one other container, the one or more substantially stable touch points being facilitated by an associated one of the first annular portion and the second annular portion,wherein, in response to hot-filling by said filling means and capping by said capping means, each said container is caused temporarily to deform, the temporary deformation being substantially confined to the sidewall portion, the first annular portion and the second annular portion providing for substantially stable touch points such that no portion of the deformed sidewall portion of any of said containers contacts any other of said containers, and a mechanical activator to activate, after the containers are conveyed, the moveable element of each said container, said activating including moving the moveable element from the first position to a second position substantially permanently to remove a portion of the vacuum. 17. The system of claim 16, wherein said activator engages with an inwardly recessed portion of a push up portion of the base above the standing surface, and wherein said moving the moveable element is performed substantially without repositioning the instep.

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Systems for compensating for vacuum pressure changes within a plastic container

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Systems for compensating for vacuum pressure changes within a plastic container

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