B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
93/72
B31B 17/00 (2006.01) B65D 83/08 (2006.01) B65D 85/671 (2006.01) B65D 85/67 (2006.01)
Patent
CA 1041817
METHOD OF MAKING A TEARING EDGE CONSTRUCTION ABSTRACT OF THE DISCLOSURE A method of making a tearing edge formed of paper- board and integral with a dispensing carton from which lengths of a sheet material contained therein, such as aluminum foil, plastic wrap, and waxed paper, are dispensed. The method includes cutting a serrated line in a piece of paperboard material to form two portions, each having a serrated edge, so that the teeth of one portion mesh with the valleys between the teeth of the other portion; spraying a tooth hardening material under pressure against one outer surface of the paperboard approximate the serrated edges; folding the portions against each other along fold line segments which integrally connect the portions together at the ends of the serrated edges, so that each tooth of one portion is positioned between two teeth of the other portion; and securing the portions together.
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