| 摘要 |
PCT No. PCT/GB95/02448 Sec. 371 Date Jun. 3, 1997 Sec. 102(e) Date Jun. 3, 1997 PCT Filed Oct. 17, 1995 PCT Pub. No. WO96/12656 PCT Pub. Date May 2, 1996An interlocking paperboard carton blank (10) is disclosed. The carton blank has at least one flap (19) projecting from a side dge of a first base panel (14), the flap having a leading portion (20) which is folded about a scored waist section score line (23) back onto the remainder of the flap to double the thickness of the flap. The leading portion of the flap includes at least one, and preferably two laterally projecting portions (21). The flap is inserted folded end first into at least one correspondingly positioned opening (27) defined in a second base panel (15) of the carton blank. The flap is passed into the opening until the two lateral projections of the folded flap are passed through the opening in the second base panel, whereupon the laterally projecting portions are constructed and arranged to be urged upwardly from the remainder of the flap so as to prevent withdrawal of the flap from the opening while the leading portion of the flap remains folded against the remainder of the flap to ensure that the flap has a doubled thickness in the interlocked base panels of the carton blank. |
