US 4,789,067 A · Carton

Abstract

An improved self-supporting paper carton of the gable-top type is disclosed having formed from a paper blank therefor with a detachable tearaway portion, a carton, which upon being spent, may be readily collapsed by fully opening the top and removing a tear strip together with the removable or tearaway portion of the carton blank. The tear strip is an assemblage bonded together having a zip tab or the actual tear strip adhered to an inner lining layer which, in turn, is adhered to the removable portion of the carton blank. The tear strip assembly is inserted into a cavity in the carton blank at the lower edge of the erected self-supporting paper carton and is dimensioned so that the transverse dimension of the tear strip is greater than that of the removable portion. After insertion, the tear strip assembly is compressed and the inner lining layer is then in conformal relation with exterior surface of the removable portion and with the perforations therebeyond. The conformance of the inner lining layer ensures a leak proof seal about the tear strip assembly. For packaging display purposes, a cover portion is provided of similar material to the face of the carton to provide for continuous printing of the carton graphics without substantial interruption by the tear strip installation.

Claims16

Dependent claims

A self-supporting paper carton of a gabled-top type comprising:

a sheet paper carton blank for forming upon appropriate folding and securing said paper carton, in turn comprising;
a body portion for reception of goods having four rectangular side panels arranged side-by-side and having three parallel fold lines therebetween, and body portion, in a formed condition, being substantially square in cross section;
a top seal portion in the formed condition being a sealed extension of said body portion providing, upon operating to an open condition, a pour spout for dispensing goods received by the carton, and, after an initial operation to said open condition, for further operation to a closed condition, to store goods received by the carton;
and,
a bottom seal portion in the formed condition, being a substantially square, sealed extension of said side panels;
detachment means for frangibly disconnection three of the four side panels of said bottom portion;
and,
sealing means for securing during carton formation said body portion, said top seal portion, and said bottom seal portion in a predetermined relative, folded position;
and
whereby upon emptying said self-supporting paper carton, the top seal portion is fully opened and the detachment means is operated to disconnect the bottom seal portion from three of the four side panels permitting the carton to fold flat for convenient disposal thereof.

7 more elements

A paper carton blank for a self-supporting carton comprising, in combination:

a body portion for reception of goods having four rectangular side panels arranged side-by-side and having three parallel panel junctures therebetween, said body portion, in a formed condition, being substantially rectangular in cross section;
a top seal portion having a pour spout for dispensing goods received by the carton, said spout operable between an open condition and a closed condition;
a bottom seal portion in the formed condition being a substantially rectangular, sealed extension of said side panels;
a flange portion attached to and continguous to one open edge of said four rectangular side panels;
at least two substantially parallel lines of perforations in the body portion defining a removable portion thereof, adjacent said bottom seal portion, and transversing the three side panels, exclusive of said side panel with said flange portion attached thereto;
detachment means for frangibly disconnecting three sides of said bottom seal portion;
an inner lining band attached to a tear strip, said inner lining band being wider than the removable portion and being in conformal relationship with the body portion to seal the perforations;
sealing means for securing during carton formation said body portion, said top seal portion, and said bottom seal portion in a predetermined relative, folded position;
and,
whereby upon emptying said self-supporting paper carton constructed from the carton blank, the top seal portion is fully opened and the detachment means is operated to disconnect the bottom seal portion from three of the four side panels permitting the carton to fold flat for convenient disposal thereof.

7 more elements

Dependencies are inferred from the claim text.

Carton

Life of this patent

Carton

Life of this patent

Abstract

Claims16