Package of flexible material, particularly for sterilisable food products

A package (1) of flexible material, for foodstuffs, comprising:

• a first flexible film defining a parallelepiped box having, in a position of use, a base or bottom wall (2), a top wall (3), a front wall (4), a rear wall (5) and two side walls (6, 7), an opening (8);
• and
• a second flexible film defining a peelable patch (9) on one of said walls, the peelable patch (9) closing the opening (8), wherein,
• the peelable patch (9) is peelably heat sealed to said wall of the package along a sealing track (20) which is disposed astride a peripheral edge of said opening (8), and
• wherein said peripheral edge of said opening (8) is defined by a first surface portion heat-sealed to an inner surface of the patch (9) and a second adjoining cross-section portion, the second cross-section portion is covered by a heat-seal overflow of a material (93) of the inner surface of the patch (9), which overflow of material (93) runs from the first surface portion and along the second cross-section portion at an area of the sealing track (20) not superimposed on the wall of the box during heat sealing so as to avoid contact of contents of the package with said edge of the opening (8).