A SCREW CAP AND A TAMPER-PROOFING RING, PACKAGING PROVIDED WITH SUCH A CAP, A METHOD OF MANUFACTURING SUCH A CAP, AND A METHOD OF MANUFACTURING SUCH PACKAGING

摘要

The invention relates to a screw cap made of aplastics material, the cap comprising a closing portion(3); optional sealing means (7) mounted in or integralwith the closing portion (3); and a tamper-proofing ring(8) made in one piece with the closing portion (3).According to the invention, the cap comprises a breakablezone (17) of the outer portion (9) enabling it to beopened on unscrewing the cap (1) leads firstly to anempty space (18) between the outer portion (9) and theskirt (5), which empty space (18) is delimiteddownstream, with respect to the unscrewing direction ofthe cap (1), by at least one non-breakable fastening (19)which does not break on unscrewing the cap (1), and whichis part of said link means (11), and secondly to abreakable zone (20a), to a cut (20b), or to a gap (20c)in the inner portion (10) so that, on unscrewing the cap(1), the tamper-proofing ring (8) remains associated withthe closing portion (3).