Method and system for handling containers
View Patent ↗Method and system for handling a plurality of hot-filled and capped containers having temporary deformations or distortions caused by vacuums induced in the containers. For each container, temporary deformations are confined or directed to a particular portion of the container. Annular hoop rings can be provided to confine the temporary deformations to a smooth sidewall portion of the container between the annular hoop rings. Alternatively, one or more supplemental vacuum panels can be provided to confine or direct the temporary deformation thereto. The annular hoop rings and the one or more supplemental vacuum panels can provide for substantially stable touch points for the container. The containers are conveyed with temporary deformations such that substantially stable contact points of each container are in contact with corresponding substantially stable contact points of other containers. After the conveying, a moveable element in a bottom end of each container is activated substantially permanently to remove the vacuum in the container.
1. A method for conveying a plurality of filled 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, the moveable element being moveable to remove substantially permanently a vacuum in the container, the method comprising:
cooling a plurality of hot-filled and capped plastic containers, said cooling creating a vacuum in each of the hot-filled and capped plastic containers, each said vacuum causing a portion of the corresponding plastic container to collapse;
conveying the plastic containers while temporarily compensating for respective collapsed portions; and
activating, after said conveying, the moveable element of each said plastic container, said activating including moving the moveable element from a first position to a second position to remove substantially permanently a portion of the vacuum,
wherein the body portion of each said plastic container includes a first annular portion, a second annular portion, and a smooth sidewall between the two annular portions,
wherein the portion of the plastic container to collapse is the smooth sidewall, with substantially no collapsing of the first annular portion and the second annular portion, and
wherein said conveying is such that each said plastic container is in contact with a plurality of other said plastic containers, the first and the second annular portions for each said plastic container providing for substantially stable touch points for conveyance of the plastic containers.
2. The method according to claim 1 , wherein one or more supplemental vacuum panels temporarily compensate for the vacuum during said conveying.
3. The method according to claim 1 , wherein during said cooling, said conveying, and said activating, the moveable element is above the support surface at all times.
4. The method according to claim 1 , wherein said activating the moveable element is by a mechanical apparatus.
5. The method according to claim 1 , wherein said activating the moveable element is performed without physically touching the moveable element.
6. The method according to claim 1 , wherein the portion of the vacuum is the entire vacuum.
7. The method according to claim 1 , wherein the portion of the vacuum is less than the entire vacuum, and the method further comprises removing a portion of the remaining vacuum using one or more supplemental vacuum panels.
8. The method according to claim 7 , wherein the portion of the remaining vacuum is the entire portion thereof.
9. The method according to claim 1 , wherein said activating the moveable element removes the entire vacuum and creates a positive pressure in the plastic bottle.
10. The method according to claim 1 , wherein said activating includes non-physical pressurization of the plastic bottle by movement of the moveable element and one or more supplemental vacuum panels.