US 12,187,479 B2
Method of sealing a compostable container by piercing the lidding
Darren Joseph Footz, Surrey (CA); and Kianoush Karimi Pour Kerman, Vancouver (CA)
Assigned to Nexe Innovations Inc., Windsor (CA)
Filed by Nexe Innovations Inc., Surrey (CA)
Filed on Jan. 6, 2022, as Appl. No. 17/570,182.
Claims priority of provisional application 63/134,502, filed on Jan. 6, 2021.
Prior Publication US 2022/0234772 A1, Jul. 28, 2022
Int. Cl. B65B 51/22 (2006.01); B65B 29/02 (2006.01)
CPC B65B 51/225 (2013.01) [B65B 29/022 (2017.08)] 10 Claims
OG exemplary drawing
 
1. A method of sealing a compostable container, the method comprising:
providing a compostable container including a sealing lip and protrusions about the sealing lip;
providing a compostable lidding material;
piercing the compostable lidding material with the protrusions about the sealing lip of the compostable container such that the protrusions extend through and protrude from the compostable lidding material;
welding a lower surface of the compostable lidding material to the sealing lip of the compostable container to create a seal; and
flattening protruding portions of the protrusions against the compostable lidding material such that the flattened protruding portions are generally flush with an upper surface of the compostable material to increase delamination resistance between the compostable lidding material and the compostable container, wherein the welding is at least one of ultrasonic welding or thermal welding.