Integrally shaped plastic closure

Details Integrally shaped plastic closure Integrally shaped plastic closure

B - Operations, Transporting

65

D

B65D 47/08 (2006.01)

Patent

CA 2318997

Plastic snap-on hinged closures consisting of a bottom part (1) and a cap (2) that are attached to each other by a snap-one hinge (3) tend to tear on the lateral borders (5). This is practically inevitable due to the geometry of closures having a round or oval shape when viewed from the top since only the flexibility of the outer walls (10, 20) have been used so far. This unresolved problem can be solved by a curvature (43) with varying height and wall thickness extending along the joint (3). The curvature (43) is elastic when pressure is exerted in the middle and when pulled from the sides.

L'invention concerne une fermeture plastique à charnière à déclic comprenant une partie inférieure (1) et un capuchon (2) reliés par une charnière à déclic (3). Cette fermeture a tendance à se fissurer sur les bords latéraux (5), ce qui est quasiment inévitable en raison de la géométrie des fermetures qui sont rondes ou ovales vues de dessus, seule la flexibilité des parois extérieures (10, 20) étant utilisée jusqu'ici. Pour remédier à ce problème, on utilise une courbure convexe (43) qui s'étend sur la charnière (3) et qui est variable en hauteur ou épaisseur de paroi. Cette courbure convexe (43) est élastique en compression au centre et en traction sur les côtés.

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