Sealed file cover with two-way air valve

Abstract

The invention relates to a sealed file cover with a two-way air valve. The sealed file cover comprises a zipper, an engineering plastic bag and a zipping fastener. The zipper is disposed at an upper-end opening of the engineering plastic bag. The two-way air valve is on the side wall on one side of the engineering plastic bag. The zipping fastener which can slide left and right is mounted on the zipper. A seal gasket is disposed between a bonnet and a valve seat of the two-way air valve. A movable seal piece is mounted in the middle on the other side of the valve seat. A central body is mounted between the seal gasket and the valve seat. A threaded column which is matched with connecting threads is disposed on one side of the central body. A support body connected with the central body is disposed in the threaded column. A circular hole is formed in the middle of the support body. A plurality of convex pieces are evenly distributed around the circular hole. A plurality of air vents are evenly formed along the periphery of the connection of the support body and the central body. The sealed file cover made of fireproof and waterproof engineering plastics is simple in structure, suitable for protection of different files, reliable and durable, and inflation sterilization and vacuumizing of the file cover are facilitated by the two-way air valve.

Description

technical field [0001] The invention relates to the technical field of file storage, in particular to a sealed file bag equipped with a two-way air valve. Background technique [0002] At present, despite the rapid development of electronic documents, some file bags or confidentiality bags are still needed to save some important paper documents in many fields. The existing file bags are mainly made of kraft paper or ordinary plastic. The tightness is not good, and it is difficult to protect some important documents such as securities, technical documents, stamps, valuable calligraphy and paintings, certificate photos and rare picture books in the event of flooding and fire during the long-term preservation process, and the long-term There will be problems such as mildew and moths when placed. Banks, archives and other places that need to save important documents are in urgent need of a multi-functional, reliable and durable sealed file bag. Contents of the invention [00...

AI Technical Summary

Problems solved by technology

[0002] At present, despite the rapid development of electronic documents, some file bags or confidentiality bags are still needed to save some important paper documents in many fields. The existing file bags are mainly made of kraft paper or ordinary plastic. The tightness is not good, and it is difficult to protect some important documents such as securities, technical documents, stamps, valuable calligraphy and paintings, certificate photos and rare picture books in the event of flooding and fire during the long-term preservation process, and the long-term There will be problems such as mold and insects when placed. Banks, archives and other places that need to save important documents urgently need a multi-functional, reliable and durable sealed file bag

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