WATERPROOF AND LIQUID-IMPERMEABLE PACKING BOX FROM CORRUGATED CARDBOARD AND METHOD OF MANUFACTURING THEREOF Russian patent published in 2020 - IPC B65D5/22 

FIELD: package and storage.

SUBSTANCE: one-piece corrugated workpiece from corrugated cardboard for impermeable and liquid-impermeable packing box comprises base surface (1), inner vertical surfaces (2) of long sides of box, inner vertical surfaces (3) of short sides of the box, angular surface (7) of angular structure of short side, angular surface (6) of long side and line (17) of bending between them. Workpiece comprises fold line (13) between vertical surface (3) of short side and angular surface (7) of box. This crease line is inclined inward to vertical surface (3) relative to crease line (14) when viewed from base surface (1). Workpiece includes outer vertical surface (8) of short side and glue valves (4) on both sides thereof, and the short side bending line (21, 22) and crosswise structure (5) arranged therebetween, as well as the long side bending line (23, 24) and transverse structure (6) configured to double therebetween.

EFFECT: group of inventions provides a strong structure having high rigidity for torsion, surfaces form an impermeable for liquid and waterproof angular structure, made with possibility of mechanical assembly using gluing as an auxiliary means.

17 cl, 5 dwg