Circular food container with double sealing structure

Abstract

The invention relates to a circular food container with double sealing structure comprises: a circular container body having an upward opening, a periphery of the upward opening outward folded to from a lower U-shaped body and the lower U-shaped body having an inner side surface forming a first sealing groove and an outer side surface forming a second sealing groove; and a circular cover having a downward opening, a periphery of the downward opening having an upper U-shaped body for fitting to each other, the upper U-shaped body having an inner side surface forming a third sealing groove and an outer side surface forming a fourth sealing groove for forming a double sealing structure of the inner side and outer side surfaces of the upper U-shaped body and lower U-shaped body.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates to a circular food container with double sealing structure, particularly to a container body and a cover of plastic vacuum molding or injection molding having an inner and outer side double sealing structure at periphery of openings thereof.[0003]2. Description of the Related Art[0004]Plastic containers of box, cup and bowel types made by means of vacuum molding are suitable for keeping food fresh.[0005]For keeping jelly, pudding, cheese or other liquid food, the food container must be well sealed, avoiding leakage during delivery or transportation.[0006]U.S. Pat. No. 6,056,138 discloses a food container, entitled “Triple seal container”. According to this design, the food container comprises a container body and a lid. The lid has a sealing edge matting corresponding edge of the container body, and a locking lip protruding from the sealing edge lockable to the edge of the container body. This desi...

AI Technical Summary

Benefits of technology

[0009]It is a primary object of the present invention to provide a circular food container with double sealing structure, which provides an inner and outer side double sealing structure at periphery of openings of a container body and a cover for well-sealing without heating.

Problems solved by technology

1. The locking lip is hooked on the bottom side of the edge of the container body. When opening the lid, the user must pull the locking lip away from the edge of the container body with the fingers. When pulling the locking lip from the edge of the container body, the user's fingers may be injured by the locking lip or the edge of the container body accidentally.

2. The locking lip enhances stability of the connection between the lid and the container body to avoid falling of the lid from the container body. However, the abutment surface area between the lid and the container body is a plane contact. Because the lid and the container body are made by vacuum molding, their wall thickness is thin. The tension or strength is insufficient to keep the abutment surface area between the lid and the container body in a tight status. If the container body falls down, a contained fluid will leak out of the food container through the gap in the abutment surface area between the lid and the container body.

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