System and method for pressurizing a plastic container
View Patent ↗A system for manufacturing a filled plastic container includes an actuator, a base unit including a heating surface, and a dispensing device or nozzle. The actuator includes a body portion and a holding/securing member configured to hold or secure a portion of the container. In embodiments, the actuator is configured to apply a force or pressure on the container to contact the base unit, the base unit is configured to receive a base portion of the container, the heating surface is configured to convey energy or heat to a portion of the base portion of the container, and the dispensing device or nozzle is configured to introduce an inert gas into the container. Methods for providing a filled plastic container and providing a thin-walled plastic container are also disclosed.
1. A system for manufacturing a filled plastic container, the system comprising:
an actuator including a body portion and a holding/securing member configured to hold or secure a portion of said container such that a base portion of said container is not held;
a base unit including a heating surface; and
a dispensing device or nozzle;
wherein the actuator is configured to apply a linear force or pressure on said container to contact the base unit; the base unit is configured to receive a base portion of said container that is formed as a unitary structure with the body portion and is configured to support the plastic container on an external surface prior to the application of the linear force or pressure by the actuator, and the base unit is not configured to invert the base portion of said container; the heating surface is configured to convey energy or heat to a portion of the base portion of said container; during the conveyance of energy or heat to the portion of the base portion of said container, the base unit is substantially fixed in the direction of travel of the actuator; and the dispensing device or nozzle is configured to introduce an inert gas into said container.
2. The system of claim 1 , wherein the container is comprised of polyethylene terephthalate (PET) and the container is thin-walled.
3. The system of claim 1 , wherein the base unit is configured to controllably conduct energy or heat to specific or select portions of the base portion.
4. The system of claim 1 , wherein the container is hot-filled and cooled.
5. The system of claim 1 , wherein the final filled container internal pressure is within the range of −2.0±1.0 psi to 2.0±1.0 psi.
6. The system of claim 1 , wherein the inert gas comprises nitrogen.
7. The system of claim 1 , wherein the system is configured to dose and cap the container, and the internal pressure of the container is increased for at least a period of time.
8. The system of claim 7 , wherein, upon capping or closure, the internal pressure of the container is from about 5 psi to about 7 psi.
9. The system of claim 1 , wherein the system is configured to remove or replace all or a significant portion of oxygen in a headspace of the container.