Dual-screw cover and dual-screw bottle

Abstract

The invention discloses a dual-screw cover comprising a cover body. The cover body is cylindrical; a cylindrical inner plug is arranged in the center inside the cover body; the inner wall of the cover body is provided with inner threaded teeth or inner threaded grooves; the outer wall of the inner plug is provided with outer threaded teeth or outer threaded grooves; the inner threaded teeth or the inner threaded grooves and the outer threaded teeth or the outer threaded grooves are the same in the screwing direction. The invention further discloses a dual-screw bottle comprising a bottle body. The outer wall of the bottle mouth part of the bottle body is provided with outer threaded teeth, the inner wall of the bottle mouth part of the bottle body is provided with inner threaded teeth, the outer threaded teeth and the inner threaded teeth are the same in the screwing direction. The dual-screw cover and the dual-screw bottle provide two sets of relatively independent sealing systems, and through the variable combination of threads or half-threads of the cover body and the inner plug, variable combination of materials of the cover body and the inner plug, and combination of the dual-screw cover and the dual-screw bottle mouth, the effects of long-term sealing and many times of effective resealing are achieved, and various sealing requirements of daily life of people are met.

Description

technical field [0001] The invention relates to the technical field of packaging containers, in particular to a double-screw cap and a double-screw bottle. Background technique [0002] Conventional bottles and caps cannot reach the ideal state during the long-term sealing process. Especially some volatile substances, such as chemicals, alcohol, gasoline, etc. Moreover, in the process of opening the cover, it may take more effort to open the cover. Improper force may easily cause damage to the cover, which is not conducive to the re-storage of the article. [0003] For example, it is difficult to achieve the purpose of secondary long-term storage after the bottle is opened. Some wines are not opened, and the liquid level of the wine will decrease during long-term storage, which is also due to the sealing factor of the bottle and the cover. Contents of the invention [0004] In order to achieve a better sealing effect, the present invention provides a double-screw cap and...

AI Technical Summary

Problems solved by technology

[0003] For example, it is difficult to achieve the purpose of secondary long-term storage after the bottle is opened. Some wines will have less liquid level during long-term storage without opening the bottle, which is also due to the sealing factor of the bottle and the cover.

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