| 摘要 |
<p>1. A paper bag of the type produced from a tube with gussets, that is to say a tubular unit (3) that when it is flat comprises two symmetrical folds (4) towards the interior in the proximity of its two edges, and the extremities of which are sealed off by two ends, characterized in that one of the two ends is produced by a glued joint (18) along a certain length of the internal face of the tubular unit, this adhesion being effected between opposite walls of the flat bag, including the gusset fold areas, and by glueing to the two opposite walls of the tubular unit a reinforcing sheet of paper (14) folded into two, of width less than the distance between the two gussets of the bag and of length at least equal to half the width of the bag, the fold (15) of this sheet being situated facing the closed end of the bag, closing the end being then finally completed by a glued joint between each fold of a gusset and the corresponding face of the bag, along an oblique line (19) extending from the closed extremity of the bag towards its centre and from the central reinforcing sheet towards the corresponding external edge of the bag.</p> |
