Patent ID: 7510516

Claim:
A method of folding a bottom of a package, which comprises a sleeve of packaging material with a bottom forming portion of the package, said bottom forming portion having the shape of a fin, the method comprising forming a transversal seal at an end of the bottom forming portion whereby the fin comprises a sealed portion of the transversal seal, after the forming of the transversal seal at the end of the bottom forming portion, pressing a middle of the sealed portion of the fin, thereby folding a middle portion of the fin, such that primary flaps are created at transversal ends of the fin, after the pressing of the middle of the sealed portion of the fin, pressing knives against corners on the folded fin in boundary regions between the primary flaps and an edge between the bottom forming portion of the sleeve and the rest of the sleeve, thereby breaking said corners, such that secondary flaps are folded in between the primary flaps and a remaining part of the fin, the secondary flaps on each side of each primary flap thereby being folded essentially towards each other, after the pressing of the knives against the corners on the folded fin, folding the primary flaps towards each other, and pressing the primary flaps towards the folded middle portion of the fin.