Method for manufacturing a board tray, a blank for the tray, and a tray obtained by the method
AssigneeStora Enso OYJ
InventorsPaivi Maeaettae, Risto Vesanto, Panu Tanninen, Petri Laakso, Jari Hovikorpi
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Abstract
A board tray, a method for manufacturing a board tray and a tray blank from which the board tray is manufactured, said board tray containing side walls and a bottom wall made of a board layer provided on at least one surface thereof with a plastic coating, wherein areas of reduced thickness are formed in the board layer whereby portions of the plastic layer which have been melted and are disposed adjacent to areas of reduced thickness are compressed into such areas forming double-folded linear plastic compressions which seal on themselves.
Claims14
A method for manufacturing a board tray which comprises:
- forming a plastic-coated board blank by coating one surface of a board layer with a plastic coating layer;
- forming cuts in the surface of the board layer which is on the opposite side from the plastic coating layer, creating areas of reduced thickness in the board layer adjacent to the plastic coating layer;
- molding the plastic-coated board blank into a board tray whereby portions of the board blank are compressed such that the plastic coating layer disposed adjacent to the areas of reduced thickness are compressed into said areas forming double-folded linear, plastic compressions which, by the application of heat, seal on themselves.
A board tray containing at least side walls and a bottom wall made of a board layer provided on at least one surface thereof with a plastic coating layer,
- cuts extending into the surface of the board layer forming areas of reduced thickness in the board layer adjacent to the plastic coating layer and at locations where the board layer is compressed in the formation of the board tray, whereby portions of the plastic coating layer disposed adjacent to the areas of reduced thickness and which have been melted are compressed into said areas forming double-folded linear plastic compressions which seal on themselves.
Dependencies are inferred from the claim text.