Method for producing barrier packaging
AssigneeWestvaco Corporation
InventorBarry G. Calvert
Life of this patent
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Abstract
The present invention relates to a method and apparatus for producing paperboard packaging blanks (trays, lids, cartons, or combinations) in which the application of the barrier coating is combined with the printing of the sales graphics in a single-pass operation which eliminates the need for a separate off-line coating operation.
Claims12
A single-pass method for preparing a paperboard web having a calendered coating of particulate minerals located substantially on a first side of said paperboard web, comprising the steps of:
- printing sales graphics substantially over said calendered coating on said first side of said paperboard web;
- and
- coating a second side of said paperboard web with an emulsion which provides barrier and heat seal properties wherein all steps are accomplished in a single-pass converting process.
A single-pass method for preparing a paperboard web having a calendered coating of particulate minerals located substantially on a first side of said paperboard web, comprising the steps of:
- printing sales graphics substantially over said calendered coating on said first side of said paperboard web;
- and
- coating a second side of said paperboard web with a solution which provides barrier and heat seal properties wherein all steps are accomplished in a single-pass converting process.
Dependencies are inferred from the claim text.