B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 3/28 (2006.01) B31F 1/00 (2006.01)
Patent
CA 2190489
A base board for a layered corrugated fiberboard structure comprises a corrugated fiberboard material including a corrugating medium having flutes, first folds along which the corrugated fiberboard material is folded in the shape of the inverted letter V, and second folds along which the corrugated fiberboard material is folded in the shape of the letter V, and the first folds and the second folds are formed in the corrugated fiberboard material in parallel to each other and in an alternate arrangement so as to extend perpendicularly or at an angle other than a right angle to the flutes. The second folds are lines of perforations, and portions of the corrugated fiberboard material that forms an outer surface when folded are incised along the lines of perforations. Otherwise, the second folds may be formed by alternately arranging hinge portions, which have a predetermined length and are formed by crushing portions of the flutes of the corrugated fiberboard material, and cut portions or slits, which penetrate the corrugated fiberboard material, in portions of the corrugated fiberboard material in which the second folds are to be formed. The first and second folds are smoothly and surely formed by a pressing machine which works on one side of the corrugated fiberboard material.
Cette invention se rapporte à un matériau de base pour stratifié en carton ondulé, qui comprend un carton ondulé contenant un support d'ondulation en escalier, qui comporte des gradins et sur lequel des premiers plis, où le carton ondulé est plié de façon à définir des coudes en forme de V inversé, et des seconds plis où le carton ondulé est plié de façon à définir des coudes en forme de V, sont formés en alternance aux intersections desdits gradins à angles droits ou à des angles autres que des angles droits et de façon parallèle les uns aux autres. Les seconds plis sont formés par des perforations et des parties qui vont constituer la face extérieure au moment du pliage sont découpées le long desdites perforations. Dans une variante, les seconds plis sont formés par des charnières d'une longueur donnée disposées en alternance le long des parties qui vont former le second pli et qui sont définies par des gradins du carton ondulé qui sont comprimés, ainsi que par des lignes découpées ou des fentes qui traversent le carton ondulé. Selon l'invention réalisée de la manière décrite ci-dessus, il est possible de former les premiers et seconds plis à partir d'une seule surface du carton ondulé et de former les plis correspondants sans à-coups et de façon effective au moyen de la même presse.
Gowling Lafleur Henderson Llp
Hitachi Zosen Corporation
Yokoyama Sankoh Co. Ltd.
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