Thick-caliper laminated paperboard and methods for making the same
AssigneeCaraustar Industrial and Consumer Products Group, Inc.
InventorsJosh Wolfenbarger, Don Ervin
Life of this patent
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Abstract
Disclosed are methods for manufacturing laminated paperboard materials that are alternatives to plastic, wood, and wood-like materials, such as plywood, medium-density fiberboard (MDF), and oriented strand board (OSB). Also disclosed are structures formed from thick-caliper laminated paperboard materials.
Claims20
A method of making laminated paperboard sheets from a convolute tube having a plurality of substantially flat sides, comprising:
- applying adhesive to at least one side of a paper web as the paper web is unwound from a paper reel;
- rewinding the paper web on a mandrel having a plurality of flat sides to form a convolute tube having a plurality of paper plies and a plurality of substantially flat sides, wherein the convolute tube comprises laminated paperboard;
- and
- cutting a plurality of laminated paperboard sheets from the convolute tube's substantially flat sides, each laminated paperboard sheet comprising a plurality of paper plies.
A method of making laminated paperboard sheets from a convolute tube having a plurality of substantially flat sides, comprising:
- applying adhesive to at least one side of a paper web as the paper web is unwound from a paper reel;
- rewinding the paper web on a rectangular mandrel having four flat sides to form a convolute tube having a plurality of paper plies and four substantially flat sides wherein the convolute tube comprises laminated paperboard;
- and
- cutting four laminated paperboard sheets from the convolute tube.
A method of making laminated paperboard sheets from a convolute tube having a plurality of flat sides, comprising:
- applying adhesive to at least one side of a paper web as the paper web is unwound from a paper reel;
- rewinding the paper web around a mandrel having four or more flat sides to form a convolute tube having a plurality of paper plies and four or more flat sides, wherein the convolute tube comprises laminated paperboard, and wherein lengthwise edges of the convolute tube are respectively defined between adjacent flat sides of the convolute tube's four or more flat sides;
- and
- cutting a plurality of laminated paperboard sheets from the convolute tube's flat sides comprising removing the lengthwise edges of the convolute tube to yield at least four planar laminated paperboard sheets, each laminated paperboard sheet comprising a plurality of paper plies.
Dependencies are inferred from the claim text.