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B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
B65D31/14—Valve bags, i.e. with valves for filling
B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms
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FR34045D1927-09-101927-09-10Procédé de fabrication d'un sac avec soupapes de fermeture automatique du sac
ExpiredFR34045E
(fr)