Coupling unit and coupling method for coupling a component to a container and apparatus for producing articles correlated thereto

A method for coupling a component of a container to said container, the method comprising:

• providing a coupling unit with a coupling element, the coupling element comprising:
• a frame,
• a housing constrained to said frame, the housing comprising at least one seat to receive said container in a stable manner,
• a gripping device constrained to said frame with an ability to move,
• a coupling device constrained to said gripping device with an ability to move, the coupling device being configured to constrain said component to said container at a predetermined coupling position, wherein a retaining element and said coupling element are positioned to bring an abutment surface of said container and a couplable portion of said component into contact with each other,
• providing said container in said seat,
• rotating said gripping device to a removal position of said component,
• selectively removing and retaining said component by said retaining element,
• rotating said gripping device and said coupling device at said coupling position,
• activating said coupling element for a predetermined coupling time to produce a stable coupling between said couplable portion of said component and said abutment surface of said container,
• deactivating said retaining element and said coupling element, thereby deactivating a constraining action between said retaining element and said component, and
• moving said retaining element and said coupling element away from said component in order to reach said removal position,
• wherein said coupling unit comprises a transporter receiving coupling equipment.