Abstract: A paperboard shaped into a profile substantially the same as that of a carton blank for folding into a carbon is formed with a plurality of first slits on an edge of the paperboard at a predetermined angle relative to the edge and with a plurality of second slits on the same edge at a predetermined angle relative to the first slits in such a manner that saw-teeth are integrally formed thereon. The saw teeth are immersed in a bath of a quick drying adhesive including .alpha.-cyanoacrylate to be impregnated with the adhesive and then dried, thereby forming teeth constituting a cutter on the carton blank. The carton obtained by folding the carton blank can be used as a packaging container for accommodating a roll of wrapping wed.

Abstract: A paperboard shaped into a profile substantially the same as that of a carton blank for folding into a carbon is formed with a plurality of first slits on an edge of the paperboard at a predetermined angle relative to the edge and with a plurality of second slits on the same edge at a predetermined angle relative to the first slits in such a manner that saw-teeth are integrally formed thereon. The saw-teeth are immersed in a bath of a quick drying adhesive including .alpha.-cyanoacrylate to be impregnated with the adhesive and then dried, thereby forming teeth constituting a cutter on the carton blank. The carton obtained by folding the carton blank can be used as a packaging container for accommodating a roll of wrapping web.

Abstract: A cutting tool for use on a wrapping web container containing a roll of a web for wrapping foods or the like. The cutting tool has a member made of a piece of paper having a toothed portion with teeth in the form of saw-teeth, the toothed portion having been hardened by being immersed in a liquid containing an alkyl .alpha.-cyanoacrylate and dried.