Opening arrangement for drumhead cartons

Claim 2

A one-piece sheet material blank for an end-fillable carton adapted to be end sealed with a sealing membrane comprising; first end wall, first side wall, second end wall, second side wall and glue flap panels; parallel vertical score lines consecutively articulating said panels; dust flaps at each end of said first and second end walls; first and second horizontal fold lines articulating said dust flaps to said first and second end walls; major flaps articulated at each end of said first and second side walls along said first and second horizontal fold lines; said first dust flap at the top of said second end wall having at least one substantially vertical score line extending therethrough adjacent the central region thereof; the edge of said first top dust flap opposite said first horizontal score line having opposed beveled corners forming an opening tab thereon; the ends of said major flaps adjacent said first top dust flap having cutout portions; the end wall to which said first top dust flap is articulated having a plurality of substantially interconnected score lines adjacent said first horizontal fold line; a separate first breakaway panel formed in said first major top flap at the end thereof adjacent said first top dust flap; said first breakaway panel being defined by a cut having a straight portion and a semi-circular portion, an Lshaped discontinuous cut and said cutout portion of said first major flap; and a second breakaway panel formed in said second major top flap at the end thereof adjacent said first top dust flap; said second breakaway panel being defined by a substantially L-shaped discontinuous cut and said cutout portion of said major flap.

Claim 3

A reclosable drumhead carton fabricated from sheet material comprising successively articulated first end, first side wall, second end and second side wall panels; dust flaps at each end of said first and second end wall panels; first and second hinge lines articulating said dust flaps to said first and second end wall panels; major flaps articulated at each end of said first and second side walls along said first and second hinge lines; said first dust flap at the top of said carton being folded last to close said carton and spot sealed to adjacent top surfaces of the top major flaps for said carton; said first top dust flap having at least one pre-broken score line extending therethrough adjacent the central region thereof and a narrowed end opposite the hinge therefor forming an opening tab; the ends of said major flaps adjacent said first dust flap having cutout portions to define therebetween an opening orifice for said carton; the adhesive for adhering said major flaps together ending at a point spaced from said orifice to form a locking abutment for said opening tab; said end wall to which said first top dust flap is articulated having a plurality of pre-broken substantially interconnected score lines adjacent The hinge connection for said first dust flap; a sealing membrane applied to at least the inner surfaces of said first and second major flaps and said first and second dust flaps at the top of said carton; a separated first breakaway panel formed in a portion of said first major top flap adjacent said first top dust flap; said first breakaway panel being defined by a cut having a straight portion and a semi-circular portion, an L-shaped discontinuous cut and said cutout portion of said first major flap; in which said second major top flap has a separate second breakaway panel formed in a portion thereof adjacent said first top dust flap; said second breakaway panel being defined by a substantially L-shaped discontinuous cut and said cutout portion of said major flap; and adhesive for adhering that portion of said sealing membrane adjacent said first top dust flap being substantially chevron shaped to define a pull-tab for said membrane adjacent said orifice.

Claim 4

A reclosable drumhead carton fabricated from sheet material comprising successively articulated first end, first side wall, second end and second side wall panels; dust flaps at each end of said first and second end wall panels; first and second hinge lines articulating said dust flaps to said first and second end wall panels; major flaps articulated at each end of said first and second side walls along said first and second hinge lines; said first dust flap at the top of said carton being folded last to close said carton and spot sealed to adjacent top surfaces of the top major flaps for said carton; said first top dust flap having at least one pre-broken score line extending therethrough adjacent the central region thereof and a narrowed end opposite the hinge therefor forming an opening tab; the ends of said major flaps adjacent said first dust flap having cutout portions to define therebetween an opening orifice for said carton; the adhesive for adhering said major flaps together ending at a point spaced from said orifice to form a locking abutment for said opening tab; said end wall to which said first top dust flap is articulated having a plurality of pre-broken substantially interconnected score lines adjacent The hinge connection for said first dust flap; a sealing membrane applied to at least the inner surfaces of said first and second major flaps and said first and second dust flaps at the top of said carton; a separated first breakaway panel formed in a portion of said first major top flap adjacent said first top dust flap; said first breakaway panel being defined by a cut having a straight portion and a semi-circular portion, an L-shaped discontinuous cut and said cutout portion of said first major flap; in which said second major top flap has a separate second breakaway panel formed in a portion thereof adjacent said first top dust flap; said second breakaway panel being defined by a substantially L-shaped discontinuous cut and said cutout portion of said major flap; and adhesive for adhering that portion of said sealing membrane adjacent said first top dust flap being substantially chevron shaped to define a pull-tab for said membrane adjacent said orifice.