Closure device

A closure device for closing a container, comprising:

• a basic member,
• the basic member having a channel extending along a closure axis with an inlet opening and a pouring opening,
• wherein the closure device comprises a closure cap,
• wherein the closure cap and the basic member are formed and arranged relative to each other such that the closure cap closes the pouring opening in a closed state of the closure device and opens it in an open state of the closure device, wherein the closure cap is rotatably mounted on the basic member about the closure axis in the closed state of the closure device relative to the basic member so that the closure cap is rotatable in an opening direction of rotation relative to the basic member in order to bring the closure device into the open state,
• wherein the closure device comprises an anchor ring and a connecting element, wherein the connecting element connects the anchor ring to the closure cap, wherein the anchor ring is engaged with the basic member both in the closed state and in the open state of the closure device such that the closure cap is connected to the basic member with the connecting element and the anchor ring also in the open state,
• wherein the anchor ring is freely rotatable relative to the basic member over an angle of at least 180 degrees about the closure axis,
• wherein the closure device comprises a cutting device arranged at least in sections within the channel and having a cutting element, and
• wherein the closure cap comprises an entraining device,
• wherein the entraining device and the cutting device are formed and arranged in such a way that a first rotation of the closure cap in the opening direction of rotation causes a movement of the cutting element starting from an initial position of the cutting element in a direction pointing from the pouring opening to the inlet opening, so that the cutting element can be moved at least in sections through the inlet opening, wherein the closure device has a tamper-evident device,
• wherein the tamper-evident device in a first state provides a first visible or tactile indication and in a second state provides a second visible or tactile indication to be distinguished from the first indication,
• the closure device being designed in such a way that, when the closure cap is rotated for the first time in the opening direction of rotation, the tamper-evident device first changes from the first state to the second state at an angle of rotation D1 and then, at an angle of rotation D2, the cutting element moves out of the channel for the first time through the inlet opening, so that the angle of rotation D2 is greater than the angle of rotation DI, wherein both angles of rotation D1 and D2 are measured starting from the same angle of rotation zero point DO.