SEALING STRUCTURE FOR PACKAGING BOX, PRODUCTION PROCESS FOR SEALING STRUCTURE, AND PACKAGING BOX

WIPO Patent Application WO/2023/083061

A1

A sealing structure for a packaging box, a production process for a sealing structure, and a packaging box. The sealing structure comprises: a pull piece (1), an inner membrane (5) and a plug sheet (2), wherein the pull piece covers an outer side of an opening on a packaging box, the area of the pull piece is greater than that of the opening, and the plug sheet matches the shape of the opening and corresponds to the position of the opening; the inner membrane covers an inner side of the opening, and the area of the inner membrane is greater than that of the opening; the pull piece enables the inner membrane to be broken at the opening under the action of an external force, so as to open the opening; and the plug sheet can be embedded in the opening under the action of an external force, so as to close the opening. By providing the sealing structure on a packaging box, an opening of the packaging box can be repeatedly opened and closed, thereby effectively reducing the usage amount of plastic, which is more environmentally friendly, and reducing the manufacturing cost.

BI HANSEN (CN)

PCT/CN2022/129131

May 19, 2023

November 02, 2022

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HANSEN HENGYE BEIJING COMMERCIAL CO LTD (CN)

B65D51/22

CN114030762A	2022-02-11
CN216233879U	2022-04-08
CN1248952A	2000-03-29
CN101687567A	2010-03-31
US3441167A	1969-04-29
CN113557200A	2021-10-26
US4880137A	1989-11-14
EP0433502A1	1991-06-26

BEIJING LONGAN LAW FIRM (CN)

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