Sonoco Products has been granted a patent for a one-way valve designed for flexible packages. The valve features two film layers with offset cut lines and an adhesive layer that creates a gas flow channel, allowing fluid connection between the package interior and the surrounding atmosphere. GlobalData’s report on Sonoco Products gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Sonoco Products, Magnetic lids was a key innovation area identified from patents. Sonoco Products's grant share as of July 2024 was 60%. Grant share is based on the ratio of number of grants to total number of patents.
One-way valve for flexible packages
The granted patent US12072029B2 describes a one-way valve designed for flexible packages, comprising two film layers and an adhesive layer. The first film layer features at least one cut line, while the second film layer has an offset cut line, creating a valve area where the two layers are not permanently adhered. This configuration allows for fluid communication between the interior of the package and the ambient atmosphere. The adhesive layer includes a specific pattern that forms gas flow channels, facilitating the movement of gases from the interior of the package to the outside environment. The design allows for variations in the adhesive patch's size and configuration, which can be adjusted to achieve desired opening pressures for the valve.
Additionally, the patent outlines methods for manufacturing the one-way valve, emphasizing the importance of applying adhesive in a controlled manner to define the valve area and gas flow channels. The process includes laminating the film layers, cutting the designated lines, and applying oil to the adhesive-free regions to enhance functionality. The method is adaptable, allowing manufacturers to modify the volume of adhesive based on the required opening pressure, thus providing flexibility in the valve's performance. The claims also detail various configurations for the adhesive patches, including symmetrical and asymmetrical designs, which can be positioned at the center or offset within the valve area.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
