Patent attributes
Closure for bottles, particularly for a bottle with a neck (2) provided with a thread (5), the said closure comprising an inner cap of plastics material, having an end wall (9) and a tubular skirt (10) connected to the rim of the said end wall and extending axially along the neck, the said tubular skirt (10) being provided with an internal thread (12) which engages with the said thread (5) provided on the neck, together with an outer cap (14) of sheet metal which covers the said inner cap and which is fixed to the neck of the bottle by fixing means (22), at least one circular weakening line (19) being provided in the said sheet metal outer cap (14), the said outer cap (14) having a tubular shape and being provided with an annular enlargement (24) extending radially outwards and axially over a specified distance with the formation of an inner annular channel (25) delimited by corresponding axial end stops (26, 27) and facing the tubular skirt (10) of the inner cap. The latter is provided with an annular thickening (28) extending radially and axially, the said thickening (28) being delimited by corresponding axial end stops (29, 30) and being force-fitted into the said channel (25).