Method for integrally forming a cutter on a carton blank

Details Method for integrally forming a cutter on a carton blank Method for integrally forming a cutter on a carton blank

1991-01-22

1993-04-20

Lawrence, Evan

Coating processes

Nonuniform coating

Edge or border coating

225 49, 427290, 493 56, B05D 312, B05D 500

Patent

active

052041425

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. An apparatus for carrying out the method comprises a first group of cutting blades for forming the first slits, a second group of cutting blades for forming the second slits so as to integrally form saw-teeth on the edge portion, a bath of adhesive for impregnating the teeth with the adhesive, a dryer for drying the teeth, and a transfer device for transferring the paperboard along a predetermined path via the first and second groups of cutting blades, the bath and the dryer.

REFERENCES:
patent: 3281036 (1966-10-01), Woodling
patent: 3479203 (1969-11-01), Broadhurst
patent: 4234635 (1980-11-01), Atkinson
patent: 4272590 (1981-06-01), Blank
patent: 4371104 (1983-02-01), Korte
patent: 4386193 (1983-05-01), Reich et al.
patent: 4856502 (1989-08-01), Ersfeld et al.

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