US 11,691,777 B2
Container construction with flexible liner and one-way valve
Sabrina V. Dixon-Garrett, Bennettsville, SC (US); and Lawrence Robert Carpenter, Darlington, SC (US)
Assigned to Sonoco Development Inc., Hartsville, SC (US)
Filed by Sonoco Development Inc., Hartsville, SC (US)
Filed on Jul. 7, 2020, as Appl. No. 16/922,212.
Claims priority of provisional application 62/871,431, filed on Jul. 8, 2019.
Prior Publication US 2021/0009306 A1, Jan. 14, 2021
Int. Cl. B65D 3/26 (2006.01); B65D 3/04 (2006.01); B65D 17/50 (2006.01); B65D 51/20 (2006.01)
CPC B65D 3/268 (2013.01) [B65D 3/04 (2013.01); B65D 17/502 (2013.01); B65D 51/20 (2013.01); B65D 2577/205 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A container comprising:
a base;
at least one sidewall extending upwardly from the base and terminating in a top edge, wherein the at least one sidewall is paper-based;
a removable flexible membrane adhered to the top edge, wherein the membrane comprises a one-way valve; and
a liner ply partially adhered to an interior surface of the sidewall with an adhesive, wherein the adhesive is pattern applied such that portions of the liner ply are unadhered to the interior surface of the sidewall in unadhered portions and, wherein the liner ply is configured to release from the sidewall in at least some of the unadhered portions upon a pressure differential between the pressure within the container and the external pressure.