B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 41/34 (2006.01)
Patent
CA 2297826
A plastic screw cap (1) comprising a cylindrical cup (2) provided with an internal thread and with a pilferproof ring which is connected to the rim of the cup by means of a plurality of bridges (9) which form a circular fracture line, the ring having a plurality of internal flaps (12) which are inclined towards the bottom of the cup; the pilferproof ring comprising a cylindrical wall (8), whose thickness is such that it is substantially flexible in a radial expansion direction, a rim which is connected to the rim of the cup by the bridges, and an opposite rim which is connected to an internal annular bead (11) whose inside diameter is smaller than the inside diameter of the wall and whose thickness is significantly greater than the thickness of the wall, a plurality of flaps (12) protruding from the region connecting the flexible wall and the internal annular bead and having such a thickness as to acquire substantial rigidity with respect to radial stresses.
La présente invention concerne une capsule à vis en plastique (1) comprenant une capsule cylindrique à filetage (2) interne munie d'une bague d'inviolabilité qui est reliée au bord de la capsule par une pluralité de ponts (9) formant une ligne de fracture circulaire, la bague d'inviolabilité comprenant: plusieurs volets intérieurs (12) inclinés vers le fond de la capsule; une paroi cylindrique (8) dont l'épaisseur est telle qu'elle est sensiblement flexible dans une direction d'expansion radiale; un bord relié au bord de la capsule par les ponts; et un bord opposé relié à un bourrelet annulaire interne (11) dont le diamètre intérieur est inférieur au diamètre intérieur de la paroi et dont l'épaisseur est sensiblement plus grande que l'épaisseur de la paroi, plusieurs volets (12) faisant saillie depuis la zone reliant la paroi flexible au bourrelet annulaire interne et présentant une épaisseur suffisante pour acquérir une rigidité sensible par rapport aux contraintes radiales.
Marks & Clerk
Sacmi Cooperativa Meccanici Imola S.c.r.l.
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