Thermoplastic bag structure

B - Operations – Transporting – 31 – B

Patent

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Details

B31B 27/14 (2006.01) B31B 23/00 (2006.01) B31B 27/26 (2006.01)

Patent

CA 2246618

A thermoplastic bag structure (10) and method for making and packaging thermoplastic bags such that their tops are easily identified and the bags are easily opened. The method for producing these bags begins with cutting a flattened thermoplastic tube into two portions (16, 18). At least one of the two portions is then collapsed to form a sheet of material having a pair of thermoplastic layers, a straight folded bottom edge (32) and a pair of top edges, at least one of which is skewed-cut (22). Bag side structures (30) are formed in the sheet of material at about bag-width distances apart. The bags are then folded a predetermined number of times, in a direction transverse to the bag side structures, so that the skewed-cut top edge(s) (22) of each of the bags remains exposed.

Structure (10) de sac thermoplastique et procédé de production de sacs thermoplastiques d'emballage permettant une identification et une ouverture facile des sacs au niveau de leur partie supérieure. Le procédé de production de ces sacs consiste à découper un tube thermoplastique aplati en deux parties (16, 18). Au moins une des deux parties est ensuite rabattue pour former une feuille de matière présentant une paire de couches thermoplastiques, un bord inférieur plié droit (32) ainsi qu'une paire de bords supérieurs dont au moins un est coupé obliquement (22). Des structures latérales (30) de sacs sont formées dans la feuille de matière à environ des distances égales à la largeur du sac. Les sacs sont ensuite pliés un nombre prédéterminé de fois en sens transversal par rapport aux structures latérales du sac, de sorte que le ou les bords (22) découpés obliquement de chacun des sacs restent exposés.

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