Jar or Tin Lid

Abstract

The invention relates to a lid for jars or tins having a screw-lock or twist-lock mechanism for sealing the content of the jar or tin in an air-tight manner. The lid is made up of a rubber or plastic seal between the inside of the lid and the upper peripheral edge of the jar or tin. The lid has a discoid plate having a continuous opening or alternatively-no opening is inserted between the lid and the upper edge of the jar or tin. The peripheral edge representing the upper edge of the jar or tin is configured to form a tight seal with the discoid plate when the jar or tin is closed. The opening of the plate is associated with a seal facing the inside of the lid and blocking air from penetrating the opening.

Description

BACKGROUND OF THE INVENTION[0001]This invention refers to a lid for a jar or a tin with a screw-lock or twist-lock mechanism for sealing the content of the glass jar or tin in an air-tight manner. The lid comprises an annular sealing ring of rubber or plastics material between the inner side of the lid and the upper peripheral edge of the jar or tin, whereby a disk-like plate with a continuous opening is provided between the lid and the upper edge of the jar or the tin. This opening is provided with a seal, which closes the opening at the inner side of the lid.[0002]Jars with a screw-lock or a twist-lock mechanism, especially with a relatively large diameter of the lid, such as for jars including fruit, vegetables or the like, which are to be kept shut in an airtight manner, in view of quality and safety reasons in general are stored under high vacuum, and therefore require high power force if they are to be opened for the first time. In overcoming this high vacuum pressure auxiliar...

AI Technical Summary

Benefits of technology

"The invention is a jar or tin lid with a small opening that can be sealed with a sealing ring and opened with reduced force. The lid is designed to prevent the vacuum in the jar from being affected by the opening, and the sealing ring is in contact with the inner side of the lid to create a tight seal. The lid is also designed to be easily opened with a screw closure or a two-stage closure. The invention solves the problem of creating a jar or tin lid that is simple and effective at reducing costs."

Problems solved by technology

Jars with a screw-lock or a twist-lock mechanism, especially with a relatively large diameter of the lid, such as for jars including fruit, vegetables or the like, which are to be kept shut in an airtight manner, in view of quality and safety reasons in general are stored under high vacuum, and therefore require high power force if they are to be opened for the first time.

The proposals for solutions available in order to open such screw-lock mechanisms of containers with tight lids altogether are not satisfactory, especially there are many users, who are not able to apply the required forces for opening the lid and for overcoming the vacuum forces.

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