Stress-resistant flexible food package

Claim 1

A STRESS-RESISTANT FOOD PACKAGE COMPRISING AN INNER POUCH FORMED OF TWO FACE-TO-FACE FLEXIBLE RECTANGULAR FLAT SHEETS OF HEAT-SEALABLE MATERIAL, SAID SHEETS BEING HEATSEALED AT THEIR EDGES TO PROVIDE A CIRCUMSCRIBING RECTANGULAR FIN AND TO HERMETICALLY SEAL THE CONTENTS OF SAID PACKAGE, AND AN OUTER ENVELOPE OF STIFFER MATERIAL THAN SAID SHEETS, SAID STIFFER MATERIAL HAVING SUBSTANTIALLY THE FLEXIBILITY CHARACTERISTICS OF PAPERBOARD, SAID ENVELOPE HAVING A RECTANGULAR BOTTOM PORTION OF THE SHAPE OF SAID POUCH BUT SLIGHTLY LARGER IN AREA, AND FLAPS FOR ENCLOSING SAID POUCH; ONE OF SAID POUCH-FORMING FLEXIBLE SHEETS BEING SECURED TO THE BOTTOM PORTION OF SAID ENVELOPE ALONG A BONDED SURFACE BUT TERMINATING SHORT OF SAID FIN, SO AS TO LEAVE SAID FIN FREE AND SPACED FROM THE INNER EDGES OF SAID ENVELOPE: WHEREBY SAID FIN IS PROTECTED BY SAID BONDING AGAINST EXCESSIVE FLEXING AND AGAINST RUPTURE WHEN SAID PACKAGE IS SUBJECTED TO STRESS.