Cover unit with adapter, cover, and sealing film for a container

Abstract

The invention relates to a cover unit (10) for closing and sealing a container (1). The opening (9) is surrounded by a sealing edge (8). The cover unit has an adapter (11), a cover (12), and a sealing film (13). The adapter can be arranged on the container in the opening thereof or around said opening so as to leave the sealing edge exposed, and the adapter has a through-opening (22). The cover is removably arranged on the adapter. The sealing film is clamped between the cover and the adapter so as to cover the through-opening. The invention also relates to a container with such a cover unit and to a method for sealingly closing a container.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a U.S. national stage application under 35 U.S.C. §371 of International Application No. PCT / EP2013 / 051007, filed Jan. 21, 2013, which claims priority to German Patent Application No. 102012100483.8, filed Jan. 20, 2012, and German Patent Application No. 102012209597.7, filed Jun. 6, 2012, the entireties of which are incorporated herein by reference.FIELD OF DISCLOSURE[0002]The present invention relates to a cover unit for closing and sealing an opening, which is surrounded by a sealing edge, of a container such as a can, barrel or the like, to a container closed using a cover unit according to the invention and having an opening surrounded by a sealing edge, and to a method for sealingly closing a container of this type.BACKGROUND[0003]Containers are known from the art in which an end-face opening is closed and sealed using a membrane. On the container, in the opening thereof, a metal ring is generally attached ...

AI Technical Summary

Benefits of technology

The invention provides a cover unit and method for closing and sealing containers using a simple and cost-effective method. The cover unit can be pre-assembled and easily attached to a container using simple machines. The cover and adapter can be made of different materials, and the cover can be opened and reclosed easily. The cover is securely sealed onto the container using a ramp and catch structure, and the anti-twist device prevents the cover from twisting. The sealing edge and sealing film can be heated and sealed by induction, which simplifies the sealing process and reduces costs.

Problems solved by technology

One problem with containers or sealing systems of this type is that during the manufacture of the metal ring a considerable proportion of the material used is wasted.

The metal ring is produced by punching it out from a metal sheet, and so the sheet material punched out to form the internal recess becomes waste, which is inefficient, environmentally unfriendly and cost-intensive.

However, the system requires relatively high investment in facilities and machines, and attaching and sealing the sealing membrane to the generally curved inner wall of the container is generally not without difficulties in terms of manufacture, for example as a result of weld seams in the wall.

A further problematic aspect is that the sealing foil is attached to the inner container wall using an adhesive material.

Therefore, after a user removes the sealing film, material residues may disadvantageously remain on the inner wall of the container and in particular in the region of the opening edge thereof.

Also, 100% tight sealing of the container is generally not possible, and so it is only suitable for dry filling material.

Images