Child-resistant closure, package and method of making

Details Child-resistant closure, package and method of making Child-resistant closure, package and method of making

B - Operations, Transporting

65

D

B65D 41/36 (2006.01)

Patent

CA 2622395

A closure includes a skirt (40) and internal lugs (42) on the skirt. The skirt has an undulating circumferential contour that includes alternate outwardly convex and outwardly concave portions (48, 50), with the internal lugs being disposed within the outwardly concave portions of the skirt. The skirt preferably is sufficiently flexible to allow the outwardly concave portions of the skirt to assume an outwardly convex geometry as a result of outward pressure on the internal lugs during demolding of the closure. The closure thus may be simply axially stripped from the mold core during the demolding operation without requiring movement of portions of the mold core to clear a path for travel of the lugs. The lugs preferably are shaped as an inverted U that opens toward a free edge of the skirt, further to facilitate demolding of the closure.

L'invention concerne une fermeture comportant une jupe (40) et des ergots internes (42) placés sur la jupe. La jupe possède un contour circonférentiel ondulé qui comprend des parties alternées concaves et convexes vers l'extérieur (48, 50), avec les ergots internes disposés dans les parties concaves vers l'extérieur de la jupe. La jupe est de préférence suffisamment souple pour permettre aux parties concaves vers l'extérieur de la jupe de supporter une géométrie convexe vers l'extérieur comme résultat d'une pression extérieure sur les ergots internes durant le démoulage de la fermeture. La fermeture peut ainsi simplement être extraite du noyau de moule durant l'opération de démoulage sans nécessiter de mouvement des parties du noyau de moule pour dégager un passage pour le déplacement des ergots. Les ergots sont de préférence en forme de U s'ouvrant sur un bord libre de la jupe, en vue de faciliter le démoulage de la fermeture.

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