Appeal No. 2000-1789 Page 8
Application No. 08/699,572
To this end, the manufacture of such cartons has required a drying of the
tacky adhesive before the blanks could be assembled and the knocked-down
structure stacked for storage and shipment. The blanks have to be kept
separated from each other until the necessary drying has been obtained.
Similarly, even after the adhesive has been dried so as to be non-tacky, care
must be taken to see that the adhesive areas are not united when the carton
walls and flaps are folded upon one another and the flat-folded cartons are so
stacked that the adhesively coated flaps of one carton do not contact the
adhesively coated flaps of the adjacent carton. Such special handling not only
reduces the speed at which the carton can be fabricated but increases its cost.
Furthermore, undue pressure must be brought to bear against the adhesive
areas in order to seal the flaps, and to permit safe folding and stacking the
adhesive areas have had to be located on the flaps where it is difficult upon
erecting the carton to apply the pressure required to adequately seal the flaps.
Accordingly, it is the principal object of the present invention to provide a
paperboard carton structure having self-sealing end closures which can be
fabricated at high speeds and the flat folded cartons immediately stacked for
storage and shipment without drying the adhesive coatings.
Giacovas further provides (column 2, lines 1-17) that
[y]et another object is to provide a self-sealing carton with a tape adapted
to be glued to a closure flap, the tape carrying a coating of adhesive and a
protective strip, the coating of adhesive adapted to preserve its strength until
used.
A further object of the invention is to provide a self-sealing carton
structure with detachable cover strips which serve to protect undried adhesive
coatings at all times and positively prevent the coated area of the cartons from
coming into contact with each other or with any portion of the next adjacent
structure when the structures are stacked one upon the other and this being
equally applicable for all size cartons.
A further object of the invention is to eliminate the need for mating
adhesive areas, the pre-drying operation needed for mating adhesive areas and
time lost before being able to fold and stack the collapsed cartons.
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007