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US 11,078,629 B1Granted
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
Estimating the term…
Abstract
Methods of making laminated paper sheets include winding paper around a flat-sided mandrel to form a flat-sided convolute tube and cutting from the flat-sided convolute tube one or more laminated paper sheets. The laminated paper sheets are alternatives to plastic, wood, and wood-like materials, such as plywood, medium-density fiberboard (MDF), and oriented strand board (OSB).
Claims20
A method of making a laminated paper sheet, comprising:
- winding paper around a mandrel having a plurality of flat sides to form a convolute tube having a plurality of paper layers and a plurality of substantially flat sides, wherein lengthwise edges of the convolute tube are respectively defined between adjacent substantially flat sides of the convolute tube's plurality of substantially flat sides;
- applying adhesive to the paper to bond the convolute tube's adjacent layers of paper;
- and
- removing from the convolute tube one or more substantially flat laminated paper sheets.
1 more element
A method of making a laminated paper sheet, 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 (i) a plurality of paper plies, (ii) a plurality of flat sides, and (iii) a plurality of lengthwise rounded corners respectively between each pair of adjacent flat sides;
- and
- cutting from the convolute tube one or more laminated paper sheets.
1 more element
Dependencies are inferred from the claim text.