Selectively tearable stock material for a dunnage conversion...

B - Operations – Transporting – 65 – D

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B65D 81/02 (2006.01) B31D 5/00 (2006.01)

Patent

CA 2602181

A stock material (16) for use with a dunnage conversion machine (14) includes at least one ply of sheet material having spaced along the length thereof a plurality of transverse rows (22) of weakened areas (24). The weakened areas (24), which can be formed by perforations, for example, have a reduced strength relative to adjacent portions of the sheet material. Each row (22) of weakened areas (24) has at least one parameter that varies along the row (22). The strength of the stock material at the row (22), in response to a force applied across the row (22), varies across the stock material (16).

Une matière première (16) à utiliser dans une machine de transformation en produit de rembourrage (14) comporte au moins un couche de matière en feuille présentant une pluralité de rangées transversales (22) de zones affaiblies (24) espacées sur sa longueur. Les zones affaiblies (24), qui peuvent être formées par perforations par exemple, présentent une résistance réduite par rapport à des parties adjacentes de la matière en feuille. Chaque rangée (22) de zones affaiblies (24) présente au moins un paramètre qui varie le long de la rangée (22). La résistance de la matière première au niveau de la rangée (22), en réponse à une force appliquée à travers la rangée (22), varie à travers la matière première (16).

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