Microwaveable container for liquid oils

Claim 2

A microwaveable container for heating material with microwave radiation, said container containing: a bag formed of a three layer laminate comprising: a middle layer comprising microwaveable non-reactive plastic impervious to liquid oils and moisture, said middle layer having an inner surface and an outer surface and opposing side edges; an inner layer of fibrous material having an outer surface positioned adjacent the inner surface of said middle layer, an inner surface for contact with a food product, and having opposing side edges; a coating of sealant material on said inner layer, said coating impervious to water, water vapor, and liquid oils; and an outer layer of fibrous material positioned adjacent the outer surface of said middle layer and having opposing side edges; wherein said middle layer is joined to one of said inner layer and said outer layer; and whereby said laminate formed of said three layers has longitudinal side edges folded and sealed to each other to form a longitudinal seam.

Claim 3

The microwaveable container of claim 1, wherein said middle layer is joined by an adhesive to one of said inner layer and said outer layer.

Claim 4

The microwaveable container of claim 1, wherein said middle layer is joined by an adhesive to one of said inner layer and said outer layer along the periphery thereof.

Claim 5

The microwaveable container of claim 1, wherein said middle layer is joined by an adhesive to both of said inner layer and said outer layer.

Claim 6

The microwaveable container of claim 1, wherein said laminate further comprises a plurality of transverse fold lines dividing said container into a central portion and opposing end portions.

Claim 7

The microwaveable container of claim 5, further comprising material to be heated positioned in said central portion of the container between said end portions, and wherein each end portion is sealed shut.

Claim 8

The microwaveable container of claim 6, wherein one of said longitudinal seam and said sealed end portions is one of rolled, folded and crimped.

Claim 9

The microwaveable container of claim 1, including at least one longitudinal gusset.

Claim 10

The microwaveable container of claim 1, wherein at least a portion of said inner layer is coated with a water, water vapor and liquid oil impermeable material comprising one of polytetrafluoroethylene, polyester, silicone, and werner type chromium complex.

Claim 11

The microwaveable container of claim 9, wherein said coating of material impervious to water, water vapor and liquid oil impregnates at least a portion of said inner layer.

Claim 12

The microwaveable container of claim 1, further comprising a microwave sensitive susceptor positioned between the middle layer and one of the inner layer and outer layer of the container, proximate one side of the material to be heated.

Claim 13

The microwaveable container of claim 11, wherein said susceptor is affixed to one of an exterior face of the inner layer and an interior face of said outer layer.

Claim 14

The microwaveable container of claim 11, wherein said susceptor comprises a metallized film.

Claim 15

The microwaveable container of claim 1, wherein said middle layer, inner layer and outer layer are coextensive.

Claim 16

The microwaveable container of claim 1, wherein said longitudinal side edges are joined by an adhesive between the outer layer of one side edge and the inner layer of the other side edge in a lap joint.

Claim 17

The microwaveable container of claim 1, wherein said longitudinal side edges are joined by an adhesive between the inner layer of one side edge and the inner layer of the other side edge in a fin seal.

Claim 18

The microwaveable container of claim 1, wherein each said end portion is sealed by an adhesive between the outer layer of one side and the inner layer of the other side.

Claim 19

The microwaveable container of claim 1, wherein each said end portion is sealed by an adhesive between corresponding inner layers.

Claim 20

The microwaveable container of claim 1, wherein the side edges of said middle layer extend outwardly from the side edges of said inner layer and said outer layer of the laminate.

Claim 21

The microwaveable container of claim 1, wherein said side edges of said middle layer are joined to each other by an adhesive in a lap joint.

Claim 22

The microwaveable container of claim 1, wherein said side edges of said middle layer are joined to each other by said adhesive in a fin seal.

Claim 23

The microwaveable container of claim 1, wherein said side edges of said middle layer are joined to each other by a heat sealing process.

Claim 24

The microwaveable container of claim 1, wherein the side edges of said middle layer extend outwardly from the side edges of said inner layer.

Claim 25

The microwaveable container of claim 1, wherein a side edge of a middle layer is joined to a side edge of an inner layer by adhesive in a lap joint.

Claim 26

The microwaveable container of claim 1, wherein a side edge of a middle layer is joined to a side edge of an outer layer by adhesive in a lap joint.

Claim 27

The microwaveable container of claim 1, wherein said middle layer is comprised of polyester.

Claim 28

The microwaveable container of claim 1, wherein said middle layer is comprised of Mylar polyethylene terephthalate.

Claim 29

The microwaveable container of claim 1, wherein said inner layer comprises one of kraft paper and rolled greaseproof paper.

Claim 30

The microwaveable container of claim 1, wherein said material impervious to water, water vapor and liquid oil is coated on the outer surface of said inner layer.

Claim 31

An elongated laminated sheet for fabricating a plurality of microwaveable containers for leakproof storage of material containing liquid oil, said laminated sheet comprising: an outer layer comprising a fibrous material, said outer layer having an inside surface and an outside surface with opposed side edges; a middle layer comprising a film of plastic material impervious to liquid oil, said middle layer having an inside surface and an outside surface with opposed side edges; an inner layer comprising a fibrous material, said inner layer having an inside surface and an outside surface with opposed side edges, at least a portion of one of said inside and outside surfaces coated with a sealant impervious to water, water vapor, and liquid oil; and a first adhesive interposed between at least portions of said outside surface of said inner layer and the inner surface of said middle layer to join said inner layer to said middle layer; wherein said laminated sheet is formed in a roll to be transversely cut into discrete portions for fabricating individual containers.

Claim 32

An elongated laminated sheet for fabricating a plurality of microwaveable containers for leakproof storage of material containing liquid oil, said laminated sheet comprising: an outer layer comprising a fibrous material, said outer layer having an inside surface and an outside surface with opposed side edges; a middle layer comprising a film of plastic material impervious to liquid oil, said middle layer having an inside surface and an outside surface with opposed side edges; an inner layer comprising a fibrous material, said inner layer having an inside surface and an outside surface with opposed side edges, at least a portion of one of said inside and outside surfaces coated with a sealant impervious to water, water vapor, and liquid oil; and a first adhesive interposed between at least portions of said outside surface of said inner layer and the inner surface of said middle layer to join said inner layer to said middle layer; wherein said laminated sheet is formed in a roll to be transversely cut into discrete portions for fabricating individual containers.

Claim 33

The laminated sheet of claim 30, further comprising a second adhesive interposed between at least portions of said inside surface of said outer layer and the outside surface of said middle layer to join said middle layer to said outer layer.

Claim 34

The laminated sheet of claim 30, further comprising a plurality of microwave susceptor patches between said middle layer and one of said inner layer and said outer layer for generating heat upon application of microwave radiation.

Claim 35

The laminated sheet of claim 30, wherein said middle layer comprises polyester.

Claim 36

The laminated sheet of claim 30, wherein said middle layer comprises polyethylene terephthalate.

Claim 37

The laminated sheet of claim 30, wherein at least a portion of said inner layer is impregnated with said sealant material comprising polytetrafluoroethylene, polyester resin, silicone, and werner type chromium complex.

Claim 38

The laminated sheet of claim 30, wherein the distance between the opposed longitudinal edges of the inner layer is less than the distance between the opposed longitudinal edges of the middle layer, to expose said middle layer along each longitudinal edge.

Claim 39

The laminated sheet of claim 30, wherein the distance between the opposed end edges of the inner layer is less than the distance between the opposed end edges of the middle layer.

Claim 40

The laminated sheet of claim 30, wherein the distance between the opposed longitudinal edges of the inner layer and the distance between the opposed longitudinal edges of the outer layer are each less than the distance between the opposed longitudinal edges of the middle layer, to expose the middle layer proximate the opposed longitudinal edges thereof on the inside and outside surfaces thereof.

Claim 41

A microwaveable popcorn package for non-refrigerated storage, comprising: a bag formed of a continuous layer of plastic impervious to liquid oil, water vapor, moisture and gas, said layer of plastic having an interior surface and an exterior surface with opposed side edges and opposed end edges, said opposed side edges joined to each other and each end edge sealed to itself; an inner layer of fibrous material joined to a portion of the interior surface of the plastic layer with a first adhesive, at least a portion of said inner layer including an impregnating coating of a sealant material impervious to water, water vapor, and liquid oil; a microwave susceptor between the layer of plastic and the inner layer; an outer insulative layer joined to at least a portion of the exterior surface of the plastic layer with a second adhesive; and a plurality of popcorn kernels on the inner layer within the bag.

Claim 42

A microwaveable popcorn package for non-refrigerated storage, comprising: a bag formed of a continuous layer of plastic impervious to liquid oil, water vapor, moisture and gas, said layer of plastic having an interior surface and an exterior surface with opposed side edges and opposed end edges, said opposed side edges joined to each other and each end edge sealed to itself; an inner layer of fibrous material joined to a portion of the interior surface of the plastic layer with a first adhesive, at least a portion of said inner layer including an impregnating coating of a sealant material impervious to water, water vapor, and liquid oil; a microwave susceptor between the layer of plastic and the inner layer; an outer insulative layer joined to at least a portion of the exterior surface of the plastic layer with a second adhesive; and a plurality of popcorn kernels on the inner layer within the bag.

Claim 43

The microwaveable popcorn package of claim 39, wherein said sealant material comprises one of polytetrafluoroethylene, polyester resin, silicone, and werner type chromium complex.

Claim 44

The microwaveable popcorn package of claim 39, further comprising a third adhesive joining said opposed side edges to each other and each end edge to itself.

Claim 45

The microwaveable popcorn package of claim 39, wherein said edges are joined by heat fusion.

Claim 46

The microwaveable popcorn package of claim 39, further comprising an oil in contact with said popcorn kernels.

Claim 49

The method of claim 44, wherein said susceptors comprise metallized film applied by metal vaporization.

Claim 50

The method of claim 44, wherein said susceptors are formed by metallizing a surface of said first web and then removing a portion of said metallized surface whereby the remaining portions comprise said susceptors.

Claim 51

The method of claim 44, wherein said sealant material comprises one of silicone, polytetrafluoroethylene, polyester, and werner type chromium complex.

Claim 54

The method of claim 48, wherein the susceptors are formed on the first web prior to applying said polyester resin.

Claim 55

The method of claim 48, wherein the susceptors are formed on the layer of polyester applied to the first web.

Claim 56

The method of claim 48, wherein said sealant material comprises one of silicone, polytetrafluoroethylene, polyester, and werner type chromium complex.