Vacuum seal cover of circular container

Abstract

A vacuum seal cover of a circular container has a circular tabular seal ring, so that the container no longer needs a fixing protrusion, and the cover includes a sheathing hole, a plurality of air holes disposed around the cover, and an umbrella valve installed at the sheathing hole and provided for vacuuming the container or releasing the pressure through the umbrella valve. The cover is installed at an opening of the container, and the air in the container can be extracted by an air extracting device to define a vacuum and maintain the interior of the container at a vacuum condition, so as to extend the expiration of the contents stored in the container.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a seal cover of a circular container, and more particularly to a seal cover of a circular container that comes with a simple structure and provides a vacuum seal.BACKGROUND OF THE INVENTION[0002]Referring to FIG. 1 of the structure of a conventional seal cover of a circular container, the seal cover is applied as a cover 20 of a container 10 with a circular opening, and the cover 20 is situated at a top rim 11 of an opening of the container 10. The cover 20 has a circular groove 23 disposed around the periphery of the cover 20, and a seal gasket 24 installed to the groove 23. The top rim 11 of the container 10 can be sheathed into the groove 23 and coupled with the seal gasket 24.[0003]The container 10 has a plurality of fixing protrusions 12 disposed proximate to the top rim 11, and the cover 20 has corresponding locking tabs 21 hinged with the periphery of the cover 20, such that the locking tabs 21 can be turned, and ea...

AI Technical Summary

Benefits of technology

[0008]Therefore, it is a primary objective of the present invention to provide a seal cover of a circular container, such that the container no longer needs a fixing protrusion, and the seal ring does not need a penetrating hole, and thus the integrity of the periphery of the opening of the container can be maintained. For applications, there will be no alignment issue anymore. The operation becomes more convenient and the invention provides a good sealing function.

[0009]Another objective of the present invention is to provide a seal cover having a vacuum function, wherein an air extracting device is provided for vacuuming the container to maintain the interior of the container at a vacuum condition, so that the expiration date of the contents stored in the container can be extended.

[0011]The diameter of the circular wall is slightly smaller than the opening of the container, so that after the circular wall is plugged into the opening, the exposed seal ring is pressed and squeezed between the circular wall and an internal wall of the container, and thus the interior space of the container is isolated from the outside to define a seal condition. With the pressure releasing function of the umbrella valve in accordance with the present invention, the cover can be covered onto the opening of the container, and the air extracting device is provided for extracting the air in the container through the umbrella valve, so that the interior of the container is vacuum, and the cover with the sealing function can maintain the interior of the container at a seal condition, and the expiration date of the contents stored in the container can be extended.

[0013]The invention further comprises a folded edge disposed concavely downward from a connecting position of the press button and the patch, so that the patch can be bent, lifted and separated from the air hole easily.

Problems solved by technology

However, these locking tabs 21 are latched and opened repeatedly, and thus the hinged position may be torn or cracked easily.

If the thickness is increased, then the hinged position will not be torn or crashed so easily, but it will be difficult for users to latch or open the locking tabs 21, and users cannot operate the locking tabs 21 easily by one hand.

Furthermore, the design of the fixing protrusions 12 cannot maintain an integrity of the circular opening of the container 10, and the through hole 22 of the locking tab 21 of the cover 20 must be aligned precisely with the fixing protrusions 12 before the locking tabs 21 can be latched with the fixing protrusion 12, and thus the operation is inconvenient.

Although the tabular seal ring 45 can maintain the original shape of the opening of the container 30, the penetrating hole 46 may cause a poor sealing effect for this type of covers.

Furthermore, the foregoing conventional seal cover of a circular container only has the sealing function, but it does not have the vacuum function.

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