Patent ID: 6056680
Filing Date: 2000-05-02
Classification: B65D

Abstract:
A method for manufacturing an airtight box from cardboard, wherein a blank is cut out which comprises sidewall panels which are mutually interconnected through sidewall fold lines, end wall panels which are attached to the sidewall panels via respective end wall fold lines, while the end wall panels are each bounded to two opposite free edges and a free end wall edge located opposite the end wall fold line; wherein after the blank has been cut out, along the end wall fold lines a flexible material strip is connected with the sidewall panels and a number of end wall panels through adhesion, which material strip is attached to each of a number of other end wall panels while leaving clear two triangular portions not provided with adhesive, located adjacent the free edges of the corresponding end panel wherein thereafter the blank is erected to form the box through folding and adhesion, characterized in that the adhesive for the purpose of adhering the material strips to the blank is applied in such a manner that the adhesive layer on the relevant end wall panel terminates at some distance from the edge of the adjacent end wall panel, recesses being provided at the location of the edges of the end wall panel which are adjacent to an adjacent end wall panel which recesses are so wide that adhesive for the purpose of attaching the material strip to the corresponding end wall panel is exposed at that point, and thereafter adhesive for the purpose of interconnecting the end wall panels is applied so as to be in communication with said exposed material strip attachment adhesive so as to form a glue dam for stopping air leakage and forming an airtight seal.