Patent ID: 7207465

Claim:
A self-opener closure for composite packagings for container spouts with a film material, comprising: a spout mounted on a composite packaging or on a container spout sealed with a film material, said spout having an inner side with at least two guide webs around its inner circumference and having varying inclines; a rotary cap having an inner side with at least two detached cylinder wall segments spaced apart from one another in a circumferential direction; and, a self-opener having a sleeve-shape with said rotary cap and said self-opener being arranged within said spout and being rotatable via said rotary cap, said self-opener having an outer side with at least two guide ribs on said outer side with each guide rib of said at least two guide ribs of said self-opener having a guide surface, so that when said self-opener rotates within said spout, said guide surface of said self-opener is guided by said at least two guide webs of said spout, thereby rotating said spout in a downwardly-directed movement along a screw-path, said self-opener further comprising at an inner side of an upper edge at least one web extending radially from a sleeve axis and traversing a diameter of said self-opener, said at least one web fitting between spaces of said at least two detached cylinder wall segments and walls of said spout, with said at least two guide ribs of said self-opener being arranged in distribution over a circumference of said outer side of said self-opener, said least two guide ribs cooperating with said at least two guide webs at said inner side of said spout in distribution over a circumference of said inner side of said spout, so that when said rotary cap rotates, torque of said rotary cap transmits over lateral limiting edges of said cylinder wall segments to a traversing web and to said self-opener, said at least two guide ribs being formed so that, when rotated, said self-opener initially follows a steep downwardly-directed screwline movement and subsequently assumes a purely rotational movement in a horizontal plane.