Patent No. EP4048606 (titled "Packaging Made Of Cellulose Material And Opening Method") was filed by Karl Knauer on Oct 22, 2020. The application was issued on Sep 10, 2025.
Packaging for piece goods comprises a folded shell (16) of cellulose-containing flat material and a cover (18) enclosing an interior (24). The shell has a first side wall (30) with a first sealing rim (36) angled outwardly along a first fold edge (38), and a second side wall (32) with a second sealing rim (40) angled outwardly along a second fold edge (42). The cover is glued to both sealing rims. A perforation (44) on the first fold edge enables joint tearing of the first sealing rim and its attached cover portion from the first side wall. The bonding strength of the cover to the second sealing rim exceeds the material strength of the cover and/or shell, allowing the cover to be pulled off the second sealing rim after the first rim is torn.

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