| 摘要 |
A re-closable parallelepiped carton formed from a unitary sheet of creased and folded laminar material comprises a front panel, opposed side panels and a rear panel all equal in height, a bottom panel, and a lid formed by a top panel hingedly attached to an upper edge of the rear panel. The lid has integral front and side skirt members depending from front and side edges, respectively, of the top panel to extend outside the respective front and side panels for a relatively short part of said height. A front web member extends between an upper edge of the front panel and a lower edge portion of the front skirt member. The front web member comprises a longitudinal linear frangible zone, and upper and lower web portions above and below, respectively, the frangible zone. The upper web portion is formed from an outwardly and downwardly folded extension of the front panel. The lower web portion is formed from an extension of the front skirt member folded upwardly and inwardly and adhered to the inner surface of the front skirt member. Lifting of the lid a first time severs the web member along the frangible zone separating the upper and lower web portions. Upon subsequent re-closure of the lid, the lower web portion engages beneath the upper web portion to lock the lid in the closed position. Preferably, the upper web portion is urged outwardly from the panel by resilience of the material of the fold between the upper web portion and the front panel. Similar web members may be provided along the sides of the carton, improving the reliability of the locking action and assisting in sealing the carton on all sides to inhibit ingress of moisture. The invention also encompasses a laminar blank for forming such a re-closable folded carton.
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