Abstract: A scrubber configuration for controlling carbon dioxide levels in a shipping container containing respiring produce is disclosed. The scrubber is made up of a curtain which includes a gas-selective membrane having a CO2/O2 selectivity ratio greater than 1:1, said curtain being positioned close to and parallel with the rear wall of said container which includes a door, said curtain forming an air-tight seal dividing the interior of the container into a plenum chamber between said membrane and the (rear wall) door, and the remainder of the container in which the produce is placed. The structure also includes an air intake means for conveying fresh air from outside the container into the plenum chamber; and an air output means for conveying air from the plenum chamber to the outside of the container. A method for controlling the carbon dioxide levels inside a shipping container is also disclosed.

Abstract: A scrubber for controlling carbon dioxide levels in a shipping container containing respiring produce is disclosed. The scrubber is relatively small, utilizes a gas-selective membrane having a CO2/O2 selectivity ratio greater than 1:1, and fits inside the shipping container (such as a sea van container). In contrast to current methods of controlling CO2 levels in shipping containers, such as the use of hydrated lime, the scrubbers of the present invention are efficient, relatively inexpensive, do not take up shipping space within the container, and do not present handling or disposal issues. A method for controlling the carbon dioxide levels inside a shipping container containing respiring produce, utilizing the carbon dioxide scrubbers defined, is also disclosed.

Abstract: Produce packages are stacked onto a pallet having an underlying gasproof plastic sheeting. The loaded pallet is placed on a rotatable table and a plastic bag is lowered over the produce which has its lower edges located partway down over the upturned portions of the plastic sheeting and onto the rim of the pallet. Two rolls of tape mounted at different heights on vertical spindles closely adjacent the table provide two tape strips with an edge portion overlapping. An idler roller joins the two strips of tape together in a single composite tape strip. The composite tape strip is applied by a pressure roller along the lower edge of the plastic bag and the pallet. After a full revolution of the table is completed, the tape is cut and the bag is completely sealed to the pallet. A lever arm on the pressure roller is spring-loaded to maintain the tape compressingly contacting the plastic bag and pallet throughout the full range of table rotation. Artificial gaseous environment is then provided to sealed container.