Plastic container
AssigneeMauser-Werke GmbH
InventorDetlev Weyrauch
Life of this patent
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Abstract
The present invention relates to a container (10) which is produced in a blow molding process and is made of thermoplastic material—preferably a bung drum—having a welded-on bung connector, prefabricated in an injection molding process and having an internal thread, for the storage and transport of liquid or free-flowing contents. In order to eliminate disadvantageous material distortion in blow-molded containers as a result of relatively long cooling times of thick locations, e.g. at threaded bungs and flash seams, according to the invention formed in the top (30) of the container (10) is a shortened welded bung connector (32), onto which a solid threaded welding head (12), prefabricated in an injection molding process and having an internal thread (20), is welded.
Claims7
A container comprising:
- a container body comprising a thermoplastic material, the container body (i) having a top, a bottom, and at least one side and (ii) comprising a bung receiver portion located on the top of the container body, wherein:
- the bung receiver portion has a concave shape extending inwardly toward an inner portion of the container body;
- the bung receiver portion defines a first opening extending through the top;
- and
- at least a portion of the concave shape of the bung receiver portion comprises a first annular attachment surface surrounding the first opening;
- and
- a bung attachment part comprising:
- a lower portion having a convex shape mirroring the concave shape of the bung receiver portion;
- and
- a second opening extending through the bung attachment part, the second opening defining an internal wall have a threaded surface,
- wherein at least a portion of the convex shape of the bung attachment part comprises a second annular attachment surface complementary to the first annular attachment surface.
Dependencies are inferred from the claim text.