| 摘要 |
A carton of paperboard or the like has thermoplastic adhesive applied to the surfaces to be bonded and employs major end panels, end flaps and minor end panel strips to form a leakproof carton with a minimum size flat stock blank. In the blank, the end flaps are articulated to the opposite sides of the bottom panel for bonding to the major end panel and with a guide tab to guide said flaps during folding. A minor end panel strip overlies the free edge of the major end panel to complete the sealed carton. Embossed fold beads cooperate with free edges to enhance sealing efficiency and the panel forming slits are spaced from the center line of the beads to provide further caulking of the joints. Blanks are oppositely directed on the flat stock with the major and minor panels, and the guide tabs being contiguous to each other for conservation of material. Hot air nozzles are provided at a process station to activate preapplied thermoplastic material on not only the panels, but also on the fold beads.
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