B - Operations – Transporting – 31 – F
Patent
B - Operations, Transporting
31
F
154/72.13
B31F 1/20 (2006.01) B29C 53/22 (2006.01) B31D 3/00 (2006.01)
Patent
CA 2012858
A corrugated fiberboard article having no wrinkles in the surface thereof is produced by previously forming slits or/and notches in at least one linerboard of corrugated fiberboard at predetermined positions, temporarily tacking the linerboard to the rest of the corrugated fiberboard with a fusible adhesive interposed therebetween, temporarily tacking an auxiliary sheet to the linerboard with a fusible adhesive interposed therebetween to form a corrugated fiberboard blank. The auxiliary sheet has an integral structure including covering portions which cover the slits or notches and cut portions each defined between each pair of adjacent covering portions. The corrugated fiberboard blank is formed by a forming die under heating.
Cette invention concerne un article en carton ondulé à surface libre de fronces produit par entaillage et/ou encochage préalable d'au moins un des cartons de couverture à des endroits prédéterminés, par collage temporaire du carton de couverture à l'âme ondulée au moyen d'un adhésif fusible, par collage temporaire d'une feuille auxiliaire au carton de couverture au moyen d'un adhésif fusible pour former une ébauche en carton ondulé. La feuille auxiliaire a une structure propre qui comprend des parties de recouvrement des parties entaillées ou encochées définies entre chaque paire de parties de recouvrement. L'ébauche en carton ondulé est formée à la presse à découper chauffante.
Sakurabashi Ryoetsu
Watanabe Masahiro
Oji Paper Co. Ltd.
Riches Mckenzie & Herbert Llp
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