Cushioning conversion machine and method

B - Operations – Transporting – 31 – D

Patent

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Details

B31D 5/00 (2006.01)

Patent

CA 2385238

A cushioning conversion machine having a novel former around which a sheet material is folded to form an improved cushioning product. The former has longitudinally spaced side surfaces inclined from bottom to top toward a downstream end of the machine. The side surfaces cause the obstruction of the sheet stock material upstream of the side surfaces so that the sheet material crumples in the spaces upstream of the side surfaces, thereby increasing the cushioning properties of pillow portions of the cushioning product. The former also has a centrally located base plate which minimizes crumpling in a central portion of the sheet material so that the folded over portions and the central portion can be connected to maintain more effectively the shape of the pillow portions in the resulting cushioning product. In addition, the former has a guard plate mounted above longitudinally spaced bottom edges extending laterally outwardly from the base plate and upstream from a vertical central plane. The former also has a pair of mandrels at its downstream end which internally fluff the crumpled pillow portions before the central portion is connected. The machine also has a width adjustment device for selectively adjusting the width of the resulting cushioning product.

Cette invention concerne un convertisseur pour produits de calage comportant une forme d'un type nouveau autour de laquelle un matériau en feuille est replié et forme un produit de calage amélioré. La forme présente des surfaces latérales espacées dans le sens de la longueur, inclinées du bas vers le haut et orientées vers l'aval de la machine. Les surfaces latérales provoque une obstruction du matériau en feuille en amont desdites surfaces de sorte que ce matériau se froisse dans cet espace amont, ce qui augmente les propriétés de calage des parties de calage dudit produit. La forme comporte également en son centre une plaque de base qui réduit le froissage dans la partie centrale du matériau en feuille de sorte que les parties rabattues de la partie centrale peuvent être reliées et maintiennent plus efficacement la forme des parties de calage du produit de calage. De plus, la forme comporte une plaque de protection montée au dessus des bords inférieurs espacés longitudinalement, qui est tournée vers l'extérieur de la plaque de base et vers l'amont à partir du plan vertical central. La forme comporte également une paire de mandrins à son extrémité aval qui ouvrent les parties de calage froissées avant raccordement de la partie centrale. Enfin, la machine est équipée d'un dispositif de réglage de largeur qui permet de régler sélectivement la largeur du produit de calage.

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