Patent ID: 9409691
Filing Date: 2016-08-09
CPC Classification: B65D

Claim Text:
1. Method for production of a self-venting packaging for use in heating a food item in a microwave oven , said packaging comprising a rupturable valve seal, said rupturable valve seal creating a weak point on said packaging, suitable to break in case of overpressure inside the packaging, said method comprising the following consecutive steps: providing an open plastic packaging; filling said packaging with a food item; sealing the plastic packaging to obtain a closed pack via a closing seal with the food item therein; the closing seal extending along the entire perimeter of the package; heat treating said food item by pasteurization or sterilization above 100° C; providing a rupturable valve seal on the packaging, said rupturable valve seal comprising an inside-inside seal obtained by ultrasound technology; said rupturable valve seal being not connected to the closing seal and formable through an area of food contamination.