Packaging material, packaging pad and machine for...

B - Operations – Transporting – 31 – B

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Details

B31B 1/00 (2006.01) B31D 1/00 (2006.01) B31D 3/02 (2006.01) B31D 5/00 (2006.01) B65D 65/40 (2006.01) B65D 81/03 (2006.01)

Patent

CA 2194051

A packaging material comprises a base sheet (4; 148a, 148b) of unexpandable material such as paper and a second sheet (6 or 8; 112a, 112b or 112c) of expandable material such as paper, the second sheet having a number of rows of longitudinally spaced slits with the slits of one row offset from the slits of an adjacent row and being secured, in its expanded condition, to the base sheet. A packaging pad may comprise outer layers of unexpandable material with at least one layer of expanded material therebetween. The invention also provides a machine for use in manufacture of the material.

Un matériau d'emballage se compose d'une feuille support (4; 148a, 148b) en matériau non extensible telle que le papier, et d'une seconde feuille (6 ou 8; 112a, 112b ou 112c) faite de matière expansible telle que le papier. Cette seconde feuille présente un certain nombre de rangées de fentes réparties dans le sens de la longueur, les fentes d'une même rangée étant décalées par rapport aux fentes d'une rangée adjacente. Cette seconde feuille est fixée à l'état d'expansion à la feuille support. Un coussin de bourrage peut comporter des couches externes en matériau non expansible, au moins une couche en matériau expansible à l'état d'expansion étant prévue entre ces dernières. L'invention concerne également une machine utilisable pour la fabrication de ce matériau.

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