Structure of check valve and vacuum sealing container for food and other objects

Abstract

A structure of vacuum sealing container for food and other objects that can prevent reverse flow of air while preventing content and water inside the vacuum sealing container. The vacuum sealing container is able to create a vacuum condition so that a content such as food or medicine can be stored inside the vacuum sealing container for a long period of time. The vacuum sealing container has a check valve that allows to expel air inside the vacuum sealing container to the outside to create a substantially vacuum condition, a re-sealable zipper that can air-tightly close the vacuum sealing container. The check valve is made of films that prevents reverse flow of air, part of which includes moisture permeation waterproof material to prevent flow of liquid inside the vacuum sealing container to the outside.

1 . A structure of check valve for use in a vacuum sealing container, comprising:
 a first outer film;   a second outer film where the first outer film and the second outer film form a vacuum sealing container;   a check valve film sandwiched between the first outer film and the second outer film where the check valve is located at an opening portion of the vacuum sealing container while contacting to or overlapping with a zipper for closing the vacuum sealing container;   an air passage formed between the check valve film and one of the first or second outer film, where seal portions are provided to create the air passage that also produce resistance against smooth flow of air; and   a moisture permeation waterproof material having property to allow penetration of air and moisture but to prevent penetration of liquid, where the moisture permeation waterproof material forms a part of the air passage to prevent flow of the liquid through the air passage.   
   
   
       2 . A structure of check valve as defined in  claim 1 , wherein the seal portions include a narrow down portion that is shaped in a V-shape that gradually narrows the air passage toward a flow direction of the air. 
   
   
       3 . A structure of check valve as defined in  claim 1 , wherein the moisture permeation waterproof material is nonwoven fabric material. 
   
   
       4 . A structure of check valve for use in a vacuum sealing container, comprising:
 a first outer film;   a second outer film where the first outer film and the second outer film form a vacuum sealing container;   a pair of check valve films sandwiched between the first outer film and the second outer film where the check valve is located at an opening portion of the vacuum sealing container while contacting to or overlapping with a zipper for closing the vacuum sealing container;   an air passage formed between the check valve films, where seal portions are provided to create the air passage that also produce resistance against smooth flow of air; and   a moisture permeation waterproof material having property to allow penetration of air and moisture but to prevent penetration of liquid, where the moisture permeation waterproof material forms a part of the air passage to prevent flow of liquid through the air passage.   
   
   
       5 . A structure of check valve as defined in  claim 1 , wherein the seal portions include a narrow down portion that is shaped in a V-shape that gradually narrows the air passage toward a flow direction of the air flow. 
   
   
       6 . A vacuum sealing container, comprising:
 a bag portion that accepts an object to be stored therein, the bag porting having a first outer film and a second outer film;   a re-sealable zipper provided on one end of the bag portion having an inlet portion for loading a product in the vacuum sealing container, the re-sealable zipper opening or closing the inlet of the bag portion; and   a check valve, comprising:
 a check valve film sandwiched between the first outer film and the second outer film; 
 an air passage formed between the check valve film and one of the upper or lower out films, where seal portions are provided in the air passage that resist smooth flow of air; and 
 a moisture permeation waterproof material having property to allow penetration of air and moisture but to prevent penetration of liquid, where the moisture permeation waterproof material forms a part of the air passage to prevent flow of liquid through the air passage; 
   where the check valve is located at the inlet portion of the vacuum sealing container while contacting to or overlapping with the re-sealable zipper.   
   
   
       7 . A vacuum sealing container as defined in  claim 6 , wherein at least a part of inner surface of the bag portion includes protuberances or irregularities that prevent smooth flow of liquid thereon. 
   
   
       8 . A vacuum sealing container as defined in  claim 6 , wherein at least a part of inner surface of the bag portion includes protuberances or irregularities that prevent smooth flow of liquid thereon where the protuberances or irregularities produce symbolic representation, logo, or aesthetic effects. 
   
   
       9 . A vacuum sealing container as defined in  claim 6 , wherein the first outer film is a film of the bag portion and the second outer film is another part of the film of the bag portion. 
   
   
       10 . A vacuum sealing container as defined in  claim 6 , wherein the first outer film is a film of the bag portion and the second outer film is also a part of the re-sealable zipper. 
   
   
       11 . A vacuum sealing container as defined in  claim 6 , wherein the check valve has a straw-shape opening that protrudes from an end of the check valve. 
   
   
       12 . A vacuum sealing container as defined in  claim 11 , wherein the check valve has a cap that fits to the protruding straw-shape opening. 
   
   
       13 . A vacuum sealing container as defined in  claim 6 , wherein the re-sealable zipper is a sliding zipper seal with a sliding knob. 
   
   
       14 . A vacuum sealing container as defined in  claim 6 , wherein the re-sealable zipper is a sliding zipper seal with a sliding knob for opening and closing the bag portion of the vacuum sealing container. 
   
   
       15 . A vacuum sealing container as defined in  claim 6 , wherein a plurality of re-sealable zippers run parallel with one another and a single sliding knob that slides along the plurality of re-sealable zippers to open and close the bag portion of the vacuum sealing container. 
   
   
       16 . A vacuum sealing container as defined in  claim 6 , further comprising an outer re-sealable zipper that is placed further outside of the re-sealable zipper, wherein the openings of the check valve are placed between the two re-sealable zippers.