Abstract: A method and apparatus are provided for sealing a gable-top container to allow easier opening, as well as the carton sealed by the method provided When the container is sealed, a portion of at least one sealing jaw is recessed to prevent functional impairment of the underlying pouring spout tips.

Abstract: Disclosed is a gable-top container including structure for reducing the force required to open the container by inducing buckling in the first and second upper rib panels of the gable-top container.

Abstract: A gable-top container including a weakened line formed in one of the facing surfaces of the first and second upper rib panels to induce controlled delamination of one of the first and second upper rib panels during opening of the pouring spout, to reduce the force required to open the pouring spout.

Abstract: A gable-top container made from a scored blank of paperboard and the like includes at least one fillet permanently attached to the outside surface of at least one of the panels which form the spout. The fillet comprises a thin strip of stiff material constructed of unoriented polypropylene coated with a layer of adhesive. The strip is resistant to the carton-sealing process, and extends along a major portion of the panel length to transfer to .applied container-opening forces to the tip of the spout preventing buckling of the spout panels. In the preferred embodiment, the portion of the fillets on the adjoining panels about one another when the spout is in a closed condition. A secondary layer of adhesive having a lesser bonding force may overlay the abutting portions of the fillets to controllably seal opposing panels to each other at the particular desired bond strength.

Abstract: A gable-top thermoplastic coated container with controllably enhanced sealing and opening characteristics includes at least one stiffening fillet attached to the panels which form the spout. The fillet comprises a thin strip constructed of unoriented polypropylene coated with a layer of adhesive, and is bonded to at least one of the spout panels. The strip is resistant to the thermal container-sealing process, and extends along a major portion of the panel length to increase the force which may be transmitted to the top of the spout where the foldback panels are adjoined, and prevent buckling of the spout panels. An adhesive web is delaminably bonded with a controlled release adhesive to the opposite surface of the strip, and is bonded to an opposed panel by the container sealing process. Delamination from the leakproof or hermetically sealed condition occurs at the interface between the strip and the delaminable adhesive, and is accomplished with a low opening force.

Abstract: A gable-top thermoplastic coated container with controllably enhanced sealing and opening characteristics includes at least one fillet attached to the panels which form the pouring spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive. The strip extends along a portion of the panel length to increase the applied opening force which may be transmitted to the tip of the spout where the gable rib panels are adjoined and prevent buckling of the spout panels. The unadhered surface of the strip does not strongly adhere to the opposing thermoplastic coated panel, so that the spout may be opened with a controlled low force, without tearing or delamination of the carton panels. The portion of the fillet-carrying panel not covered by the fillet will bond to the opposing panel by thermoplastic fusion.

Abstract: A gable-top container made from a scored blank of paperboard and the like includes at least one fillet permanently attached to the outside surface of at least one of the panels which form the spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive. The strip is resistant to the carton-sealing process, and extends along a major portion of the panel length to transfer to applied container-opening forces to the tip of the spout preventing buckling of the spout panels. In the preferred embodiment, the portion of the fillets on adjoining panels abut one another when the spout is in a closed condition. A secondary layer of adhesive having a lesser bonding force may overlay the abutting portions of the fillets to controllable seal opposing panels to each other at the particular desired bond strength.

Abstract: A gable-top thermoplastic coated container with controllably enhanced sealing and opening characteristics includes at least one fillet attached to the panels which form the pouring spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive. The strip is resistant to the thermal carton-sealing process, and extends along a portion of the panel length to increase the applied opening force which may be transmitted to the tip of the spout and prevent buckling of the spout panels. The unadhered surface of the strip does not strongly adhere to the opposing thermoplastic coated panel, so that the spout may be opened with a controlled low force, without tearing or delamination of the carton panels. The portion of the fillet-carrying panel not covered by the fillet will bond to the opposing panel by thermoplastic fusion.

Abstract: A gable-top thermoplastic coated container with controllably enhanced sealing and opening characteristics includes at least one stiffening fillet attached to the panels which form the spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive, and is bonded to at least one of the spout panels. The strip is resistant to the thermal container-sealing process, and extends along a major portion of the panel length to increase the force which may be transmitted to the tip of the spout where the fold back panels are adjoined, and prevent buckling of the spout panels. An adhesive web is delaminably bonded with a controlled release adhesive to the opposite surface of the strip, and is bonded to an opposed panel by the container sealing process. Delamination from the leakproof or hermetically sealed condition occurs at the interface between the strip and the delaminable adhesive, and is accomplished with a low opening force.

Abstract: A gable-top container made from a scored blank of paperboard and the like includes at least one fillet permanently attached to the outside surface of the gable rib panels which form the spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive. The strip is resistant to the carton-sealing process, and extends along a major portion of the panel length to transfer to applied container-opening forces to the tip of the spout where the gable rib panels are adjoined, preventing buckling of the gable rib panels. In the preferred embodiment, the portion of the fillets on the adjoining gable rib panels abut one another when the spout is in a closed condition. A secondary layer of adhesive having a lesser bonding force may overlay the abutting portions of the fillets to controllably seal the gable rib panels to each other at the particular desired bond strength.

Abstract: A gable-top thermoplastic coated container with controllably enhanced sealing and opening characteristics includes at least one stiffening fillet attached to the gable rib panels and/or roof rib panels which form the spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive, and is bonded to the gable rib or roof rib panels. The strip is resistant to the thermal container-sealing process, and extends along a major portion of the panel length to increase the force which may be transmitted to the tip of the spout where the gable rib panels are adjoined, and prevent buckling of the spout panels. An adhesive web is delaminably bonded with a controlled release adhesive to the opposite surface of the strip, and is bonded to the other one of the gable rib panels and roof rib panels by the container sealing process.

Abstract: A gable-top thermoplastic coated container with controllably enhanced sealing and opening characteristics includes at least one fillet attached to the gable rib panels and/or roof rib panels which form the spout. The fillet comprises a thin strip of stiff material coated with a layer of adhesive. The strip is resistant to the thermal carton-sealing process, and extends along a portion of the panel length to increase the applied opening force which may be transmitted to the tip of the spout where the gable rib panels are adjoined and prevent buckling of the spout panels. The unadhered surface of the strip does not strongly adhere to the opposing thermoplastic coated panel, so that the spout may be opened with a controlled low force, without tearing or delamination of the carton panels. The portion of the fillet-carrying panel not covered by the fillet will bond to the opposing panel by thermoplastic fusion.

Abstract: A heating device is taught which includes a subdivided electrochemical cell comprising subdivided metal pieces which serve as the anode and conductive cathode layers coated on the anode pieces. When such coated pieces are enveloped in a liquid electrolyte, heat is generated by electrochemical-cell reactions; and the reactions and accompanying production of heat are accelerated by the direct electrical contact between the anode pieces and cathode layers. The cathode layers can be coated on the anode pieces either prior to assembly of the heating device, or in situ after the device has been activated. In the latter case, plating is accomplished through the presence in the liquid electrolyte of a plating salt that reacts with the metal anode pieces and produces an electroless deposition on the pieces.