Abstract: A seal for a container for comestibles, especially potable liquids, and in particular for use for sealing polyester containers such as bottles, which is suitable for passage through a PET recycling process, comprises a metal foil layer, a foam layer and a plastics film layer as well as a heat sealable layer below the foil. The foam is selected for its density and thickness so is to confer upon the seal a high buoyancy. The adhesion a between the foam and the foil is increased compared to currently available products, in order to prevent de-lamination between the foil and the foam during the recycling process.

Abstract: A covering substrate which is inexpensive to manufacture and adhere to a container yet provides a hygienic environment at a top portion of the container as well as provides multiple promotional or advertising surfaces. A covering substrate capable of being bonded to a rim of a container, the container including a top wall and the rim extending beyond the top wall defining a top portion of the container, the covering providing a hygienic environment at the top portion of the container, including a substrate, a heat seal coating laminated to the substrate and disposed for bonding the substrate to the container substantially along the perimeter of the rim, and a bondable material layered in part to the substrate opposite the heat seal coating, a portion of the bondable material defining a tab therein substantially contained within the perimeter of the substrate.

Abstract: A covering substrate which is inexpensive to manufacture and adhere to a container yet provides a hygienic environment at a top portion of the container as well as provides multiple promotional or advertising surfaces. A covering substrate capable of being bonded to a rim of a container, the container including a top wall and the rim extending beyond the top wall defining a top portion of the container, the covering providing a hygienic environment at the top portion of the container, including a substrate, a heat seal coating laminated to the substrate and disposed for bonding the substrate to the container substantially along the perimeter of the rim, and a bondable material layered in part to the substrate opposite the heat seal coating, a portion of the bondable material defining a tab therein substantially contained within the perimeter of the substrate.

Abstract: A vessel closing laminate comprising: a seal laminate comprising a bottom subassembly of layers including a foil layer; and a seal substrate attached to the uppermost layer of the bottom subassembly of layers wherein the seal substrate has a bottom foam layer and a top plastic material layer and further includes a free tab lying wholly within the circumference of the seal; a wax layer on top of the plastic material layer of the seal substrate; and an absorbent liner adhered to the plastic material layer of the seal substrate by means of the wax layer.

Abstract: A method is provided for producing a primary laminate including a tabstock in which a seal laminate including a foil layer and a top foam layer, a tabstock and a plastic film stock are fed to a laminating station. At the lamination station, a curtain of polymeric adhesive is extruded between the plastics film stock and the top face of the primary substrate, which is partly comprised of the top face of the tabstock and partly comprised of the top foam layer of the seal laminate. Use of primary laminates obtained by such a process to form seals for sealing a container, for food or drink stored at low temperatures, is also described.

Abstract: A seal and method of manufacture is provided for sealing containers such as bottles, jars and the like. The seal (i.e., closure) is formed with a lower sheet-like structure having a non-foam, heat-distributing layer thereon. The lower structure includes a foil support layer and has a polymer layer, such as a PET layer disposed on its bottom surface. A heat-activated sealant layer is provided under the bottom surface of the PET layer to bond the seal to a container opening. The non-foam, heat-distributing layer is preferably a polyolefin film. Seals in accordance with preferred embodiments of the invention also include a top portion, which is only partially bonded (directly or indirectly) to the bottom portion, so as to leave a tab portion extending from the seal. The top portion is advantageously bonded from periphery to periphery of the bottom portion and at or slightly offset from the diameter (middle) of the bottom portion.

Abstract: A sealing member for a container including a polyethylene or polypropylene foam or film layer bonded to a foil layer. A first PET tab defining layer over at least a first portion of, but is not bonded to the first portion of, the polyethylene or polypropylene foam or film layer. A polypropylene film layer bonded to both a second portion of the polyethylene or polypropylene foam or film layer not covered by the first PET tab defining layer and also to the first PET tab defining layer itself, the bonds being established by an adhesive resin and catalyst to provide a bonding strength sufficient to hold against a manually generated force. The sealing member also includes a second PET layer bonded to the polypropylene film layer.

Abstract: A two-piece induction seal for use in creating clean, safe, and secure inner seals on containers having a monolayer plastic formed from synthetic fibers with stable pore dimensions for fluid permeability while retaining dimensional stability for compression. An inductive innerseal membrane is provided having a first side and a second side thereof, with an adhesive layer at the first side of the membrane. The second side of the membrane is detachably bound to the synthetic material with a wax layer. The synthetic material is further suitable for absorbing substantially all of said wax layer when said wax layer is in liquid form.

Abstract: A method is provided for producing a primary laminate including a tabstock in which a seal laminate including a foil layer and a top foam layer, a tabstock and a plastic film stock are fed to a laminating station. At the lamination station, a curtain of polymeric adhesive is extruded between the plastics film stock and the top face of the primary substrate, which is partly comprised of the top face of the tabstock and partly comprised of the top foam layer of the seal laminate. Use of primary laminates obtained by such a process to form seals for sealing a container, for food or drink stored at low temperatures, is also described.

Abstract: A vessel closing laminate comprising: a seal laminate (1) comprising a bottom subassembly of layers including a foil layer (5); and a seal substrate attached to the uppermost layer of the bottom subassembly of layers wherein the seal substrate has a bottom foam layer (2) and a top plastic material layer (10) and further includes a free tab (50) lying wholly within the circumference of the seal; a wax layer (11) on top of the plastic material layer of the seal substrate; and an absorbent liner (12) adhered to the plastic layer of the seal substrate by means of the wax layer.

Abstract: A seal for a container opening includes a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is bonded to the seal layer. The pull-tab forming layer has a heat resistant surface joined to the seal layer, and a hinge disposed near the center of the seal. A portion of the pull-tab forming layer defines a pair of opposed pull-tabs extending from the hinge, in which the heat resistant surface covers a top surface of each of the pull-tabs, a surface of the pull-tabs opposite the top surface, and a portion of the pull-tab forming layer facing the surface of the pull-tabs opposite the top surface. A method of forming the seal and a material blank for forming a plurality of the seals are also described.

Abstract: A seal for a container opening includes a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is bonded to the seal layer. The pull-tab forming layer has a heat resistant surface joined to the seal layer, and a hinge disposed near the center of the seal. A portion of the pull-tab forming layer defines a pair of opposed pull-tabs extending from the hinge, in which the heat resistant surface covers a top surface of each of the pull-tabs, a surface of the pull-tabs opposite the top surface, and a portion of the pull-tab forming layer facing the surface of the pull-tabs opposite the top surface. A method of forming the seal and a material blank for forming a plurality of the seals are also described.

Abstract: A seal for a container opening includes a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is bonded to the seal layer. The pull-tab forming layer has a heat resistant surface joined to the seal layer, and a hinge disposed near the center of the seal. A portion of the pull-tab forming layer defines a pair of opposed pull-tabs extending from the hinge, in which the heat resistant surface covers a top surface of each of the pull-tabs, a surface of the pull-tabs opposite the top surface, and a portion of the pull-tab forming layer facing the surface of the pull-tabs opposite the top surface. A method of forming the seal and a material blank for forming a plurality of the seals are also described.

Abstract: A seal for a container opening includes a backing layer and a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is sandwiched between the backing layer and the seal layer. The pull-tab forming layer has a heat sealable surface joined to the backing layer. An opposite heat resistant surface is joined to the seal layer. A hinge is disposed near the center of the seal that joins the backing layer and the sealed layer wherein the backing layer and at least a portion of the pull-tab forming layer define a pair of pull-tabs extending from the hinge. A method of forming the seal including the pull-tab forming layer and a material blank for forming a plurality of the seals are also described.

Abstract: A seal for a container opening includes a backing layer and a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is sandwiched between the backing layer and the seal layer. The pull-tab forming layer has a heat sealable surface joined to the backing layer. An opposite heat resistant surface is joined to the seal layer. A hinge is disposed near the center of the seal that joins the backing layer and the sealed layer wherein the backing layer and at least a portion of the pull-tab forming layer define a pair of pull-tabs extending from the hinge. A method of forming the seal including the pull-tab forming layer and a material blank for forming a plurality of the seals are also described.

Abstract: A seal for a container opening includes a backing layer and a seal layer for connecting to and covering an opening of the container. A pull-tab forming layer is sandwiched between the backing layer and the seal layer. The pull-tab forming layer has a heat sealable surface joined to the backing layer. An opposite heat resistant surface is joined to the seal layer. A hinge is disposed near the center of the seal that joins the backing layer and the sealed layer wherein the backing layer and at least a portion of the pull-tab forming layer define a pair of pull-tabs extending from the hinge. A method of forming the seal including the pull-tab forming layer and a material blank for forming a plurality of the seals are also described.

Abstract: A seal system is provided for a container that includes a cap. The system provides a seal between the inside surface of the cap and the rim of the container as well as an exposed foil seal on the rim of the container. Removal of the cap from the container results in a cleavage of the seal system between the foil layer that is heat sealed to the rim and the backing structure leaving an exposed upper foil surface and the backing structure which remains attached to the inside surface of the cap. After the foil seal is removed by the consumer, the backing structure disposed on the inside surface of the cap provides a gasket-type seal between the cap and the rim of the container.

Abstract: An innerseal is provided for sealing against the lip of a container opening under a cap. The innerseal includes a resiliently-compressible porous synthetic backing layer which fits within the cap, a foil layer, and a wax layer which initially holds the foil and backing layers together. Preferably, a heat-activatable adhesive layer is disposed against the foil layer. The cap is tightened so that the foil layer is pressed against the lip of the container opening. Then, heat is applied to melt the wax and to activate the adhesive layer. This molten wax is absorbed into the synthetic backing layer so that the backing layer and foil layer are separatable by a twisting of the cap. The synthetic backing layer provides improved strength and liquid resistance characteristics over pulpboard type seals, and is cuttable with less dust.

Abstract: A tamper-evident heat induction liner for sealing a container includes at least four stacked layers and exhibits improved resistance to moisture migration. A heat seal polymer layer is provided for induction bonding against a container opening. A moisture-impermeable foil layer is secured against the polymer layer opposite the container opening. Tear-resistant backing layer is provided, and is secured to a low cohesive strength layer which is disposed between the backing layer and the foil layer. The low cohesive layer splits when the backing layer is lifted, leaving the foil layer and polymer layer with a portion of the split low cohesive strength layer covering the container opening in a tamper-evident, rupturable manner.

Abstract: A seal for a container is provided with a method of manufacturing the same. The seal has a unitary pull-tab portion having with a pull-tab formed therein. A layer of polyester film preferably is secured to the unitary member over the pull-tab. A foil seal portion preferably is secured to the pull-tab portion and constructed for securing around the opening of the container. The pull-tab portion preferably is formed of a first layer of a plastic material fused to a second layer of the plastic material by extruding the one onto the other with a release layer therebetween such that an unfused portion of the first layer forms the pull-tab.