US 12,072,029 B2
Flexible laminate structure with integrated one-way valve
Donald Gregory Taylor, Hartsville, SC (US)
Assigned to SONOCO DEVELOPMENT, INC., Hartsville, SC (US)
Filed by SONOCO DEVELOPMENT, INC., Hartsville, SC (US)
Filed on Jun. 1, 2023, as Appl. No. 18/327,366.
Application 18/327,366 is a continuation of application No. 17/371,426, filed on Jul. 9, 2021, granted, now 11,703,138.
Application 17/371,426 is a continuation of application No. 16/446,904, filed on Jun. 20, 2019, granted, now 11,112,017, issued on Sep. 7, 2021.
Prior Publication US 2023/0375097 A1, Nov. 23, 2023
Int. Cl. F16K 15/14 (2006.01); B65D 77/22 (2006.01); F16K 17/164 (2006.01)
CPC F16K 15/147 (2013.01) [B65D 77/225 (2013.01); F16K 17/164 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A one-way valve for a flexible package, the one way valve comprising:
a first film layer which comprises at least one first cut line;
a second film layer which comprises at least one second cut line, wherein the at least one second cut line is offset from the at least one first cut line;
an adhesive layer disposed between the first and second film layer, wherein the first film layer, the second film layer, and the adhesive layer define a valve area in which the first film layer and the second film layer are not permanently adhered to each other, wherein the at least one second cut line fluidly connects an interior of the flexible package to the valve area and the at least one first cut line fluidly connects the valve area to an ambient atmosphere surrounding the flexible package, wherein an adhesive pattern is disposed within the valve area and creates at least one gas flow channel from the second cut line toward the first cut line, wherein the adhesive pattern comprises at least one patch of adhesive which disposed between the at least one first cut line and the at least one second cut line, and wherein the adhesive pattern is surrounded, within the valve area, with an adhesive-free region.