International Paper Company

Gerald A Marano

Donald Evans

Charles E Gibbons

Allan A Whillock

James M Kittrell

Robert L Lanham

James C Harbison

Edwin D Lomax

Raymond A Volpe

Ashok M Adur

Henry L Mei

Edward Bombolevich

Richard J Nadaskay

Dawson G Wilkerson

John M DiPinto

The specification discloses a polymer blend especially well-suited for coating paperboard substrates used in food packaging, particularly acidic or acid-generating foods such as fruit and vegetable juices. The blend contains an acid-activatable oxygen scavenger dispersed in a film-forming synthetic polymer such as an EVOH copolymer. When placed as a film or layer on the side of the substrate inside the container in contact with the food the blend is effective to reduce the oxygen in the container over time to a very low concentration, replacing the same with carbon dioxide, for an excellent preservative effect.

Oxygen-scavenging filled polymer blend for food packaging applications

A paperboard polymer coated carton having protected board raw edge surfaces for packaging food and non-food products is provided in which a thin slice of the inside carton raw edge surface is removed or skived away from the side seam flap. The thin slice includes all of the inside polymer layers and most of the paperboard. The resulting outside flap is folded into the carton inside over the paperboard raw edge surface, and is flame sealed to the inside polar polymer layer, to seal the paperboard raw edge surface. The sealed edge surface is then flame sealed to the inside of the opposite paperboard surface, thereby creating an additional inside-outside flame seal. By such a process only inside-outside seals are formed or polar-covalent seals.

Paperboard cartons having protected board raw edges surfaces and method

A method for substituting inert gas for ambient air in the headspace of a container prior to closing of an opening of the container. The container is displaced along a straight path in a predetermined horizontal direction from a first position to a second position, e.g., by a conveyor. A stream of inert gas is injected generally downward from an outlet toward the headspace via an inverted recess as the container travels from the first position to the second position along the path. The inverted recess has a peripheral edge which is a closed contour lying in a horizontal plane. The exit velocity of the inert gas at the outlet and the dimensions of the outlet are such that the flow of inert gas from the outlet into the headspace is generally laminar. A portion of the inert gas enters the headspace to displace gases inside the headspace until less than 1% oxygen remains in the headspace. The gas which has been displaced out of the headspace is then channeled to flow in the predetermined horizontal direction through a volume located at an elevation which is higher than the elevation of the headspace. The channeled gas is thereafter redirected in a generally downward direction.

Gas displacement method for packaging food and non-food products

A multilayer non-foil barrier bag or liner constructed to house hazardous chemicals such as pesticides and herbicides. The unique bags or liners maintain the efficacy of the active ingredient of the herbicide or pesticide over extended periods of time.

Non-metallic bag or liner for hazardous chemical containment

A gas displacement device and method for substituting inert gas for ambient air in a gable-top paperboard carton prior to closing of an open top of the carton. The open top has first and second predetermined dimensions in mutually perpendicular directions. The device includes a source of inert gas, a channel for outputting a blanket of inert gas through an outlet and a conveyor for moving cartons in the first direction so that each open top passes under the outlet. The outlet has maximum dimensions in first and second mutually perpendicular directions which are respectively greater than the first predetermined dimension and less than the second predetermined dimension. The open top of the carton passes underneath the outlet with the directions of the first and second predetermined dimensions being oriented substantially parallel to the first and second directions respectively. The outlet has the shape of a rectangle with rounded corners. The length in the first direction of the portion of the outlet which overlies the open top varies continuously from zero to the first predetermined dimension, is constant and equal to the first predetermined dimension, and varies continuously from the first predetermined dimension to zero respectively during first, second and third portions of the passage of the carton underneath the outlet. The width in the second direction of the portion of the outlet which overlies the open top is constant and equal to the width of the rectangle during the second portion of the passage of the container underneath the outlet.

Gas displacement device for packaging food and non-food products

A gas displacement device and method for substituting inert gas for ambient air in a gable-top paperboard carton prior to closing of an open top of the carton. The open top has first and second predetermined dimensions in mutually perpendicular directions. The device includes a source of inert gas, a channel for outputting a blanket of inert gas through an outlet and a conveyor for moving cartons in the first direction so that each open top passes under the outlet. The outlet has maximum dimensions in first and second mutually perpendicular directions which are respectively greater than the first predetermined dimension and less than the second predetermined dimension. The open top of the carton passes underneath the outlet with the directions of the first and second predetermined dimensions being oriented substantially parallel to the first and second directions respectively. The outlet has the shape of a rectangle with rounded corners. The length in the first direction of the portion of the outlet which overlies the open top varies continuously from zero to the first predetermined dimension, is constant and equal to the first predetermined dimension, and varies continuously from the first predetermine dimension to zero respectively during first, second and third portions of the passage of the carton underneath the outlet. The width in the second direction of the portion of the outlet which overlies the open top is constant and equal to the width of the rectangle during the second portion of the passage of the container underneath the outlet.

The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of a high strength, heat-resistant and caulking polymer layers which prevent pinholes, cuts, or cracking of the barrier layers during blank conversion, package formation, and package distribution. In addition, the novel polymer resin layers act to caulk the seams and channels present in the carton providing a sealed leak free container.

Oxygen impermeable leak free container

The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of high strength, heat-resistant and caulking polymer layers which prevent pinholes, cuts, or cracking of the barrier layers during blank conversion, package formation, and package distribution. In addition, the novel polymer resin layers act to caulk the seams and channels present in the carton providing a sealed leak free container.

The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of high strength, heat-resistant and caulking polymer layers which prevent pinholes, cuts or cracking of the barrier layers during blank conversion, package formation, and package distribution. In addition, the novel polymer resin layers act to caulk the seams and channels present in the carton providing a sealed leak free container.

The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of high strength, heat-resistant and caulking polymer layers which prevent pinholes, cuts, or cracking of the barrier layers during blank conversion, package formation, and package distrubution. In addition, the novel polymer resin layers act to caulk the seams and channels present in the carton providing a sealed leak free container.

Growing community of inventors

Mobile, AL, United States of America

Gerald A Marano