Abstract: The invention relates to a self-opening closure with a pouring spout (12), a self-opening sleeve (20) which is guided in the connector in a helical manner, and a cover (30) which covers the pouring spout (12). A driver cam (24) is formed on the self-opening sleeve, said driver cam defining a guide surface (241). The cover has a driver (34) which defines a front edge (341). The front edge interacts with the guide surface of the driver cam. The front edge and the guide surface are inclined by the same angle of inclination relative to the longitudinal axis in order to allow an optimal force transmission between the cover and the self-opening sleeve. Additionally, the guide surface can be designed in a concave manner, and the front edge of the driver can be rounded in a corresponding manner in order to prevent a radial deflection of the driver towards the inside.

Abstract: The invention relates to a self-opening closure with a pouring spout (12), a self-opening sleeve (20) which is guided in the connector in a helical manner, and a cover (30) which covers the pouring spout (12). A driver cam (24) is formed on the self-opening sleeve, said driver cam defining a guide surface (241). The cover has a driver (34) which defines a front edge (341). The front edge interacts with the guide surface of the driver cam. The front edge and the guide surface are inclined by the same angle of inclination relative to the longitudinal axis in order to allow an optimal force transmission between the cover and the self-opening sleeve. Additionally, the guide surface can be designed in a concave manner, and the front edge of the driver can be rounded in a corresponding manner in order to prevent a radial deflection of the driver towards the inside.

Abstract: The invention relates to a plastic closing device comprising a pouring part (1) for fixing onto packaging, a screw cap (2) that can be screwed onto the pouring part (1) and a self-opening collar (3) in the pouring part (1) that can be moved downwards with a screw action onto the packaging in order to open the latter. The screw cap (2) has a follower (24), which acts on a stop element (36) of the self-opening collar (3) and which, when the screw cap (2) is first opened, moves the self-opening collar (3) inside the pouring part (1) into a lower position onto the packaging in order to open the latter. When the pouring part (1) is subsequently closed by the screw cap (2), the self-opening collar (3) remains in the lower position. The self-opening collar has several cutting and/or piercing elements (32a, 32b) with a substantially quadrangular basic form. Said form is interrupted by a lower longitudinal edge comprising a sloping and a longer and flatter rising region.

Abstract: A two-part hinge closure having a lower part which has a surrounding outer wall and which can be placed on a container, and has a cap which has an outer wall and which can be joined to the lower part in a hinged manner. The lower part and the cap are separately produced and can be assembled together. In an assembled and closed state, the outer walls are situated above each other in an aligned manner, at least in the hinge area of both hinge closure parts. Both closure parts can be joined to one another by a snap hinge having at least one spring element and at least one coupling piece. When the closure is in a closed state, the at least one spring element and the at least one coupling piece are at least almost aligned with the outer wall of the closure part on which they are formed as one piece.

Abstract: A closing device arranged above a pierceable point of a closed container including a lower part with a cylindrical discharge nozzle, a screw cover and a piercing element. The piercing element, which is open on both sides, is displaced downwards in an axial direction in a screw-like manner in a screw cover in the lower part of the closing device. The piercing element has two cutting elements offset at an angle which produce a continuous, interconnected cutting line, and a displacing element which shifts a partially cut-out tab of the container from a region of the discharge nozzle.

Abstract: A closing device located on a container of laminated paper, over a predetermined opening. The device has a lower part with a pouring opening and a cover closing the opening. A push-piece for breaking open the predetermined opening is provided in the lower part. The push-piece is joined to the lower part by a snap hinge, making the device more user-friendly and ensuring that the laminated paper predetermined opening does not obstruct the pouring opening area.