| 摘要 |
FIELD: process engineering.SUBSTANCE: retort-barrel comprises tubular element formed by blank with paper layer and thermoplastic polymer layers applied on both sides of said paper layer and bottom layer that seals one of openings of said tubular element. Note here that said bottom layer has peripheral edge section bent downward. Tubular section has secured overlaid section whereat both edges are lapped and compacted. Bottom bent section is formed at tubular section lower end by bending the blank inward. Top bent section is formed by bending the ends of tubular section bend end inward. Note also that tubular section bottom end, top bent section and peripheral edge section are tightly sealed together. Bottom section peripheral edge is fitted in lower bent section.EFFECT: perfected design.20 cl, 28 dwg |
