US4723700A — Vented food package with moisture permeable liner

Claim 1

Independent Claim 72 words

A package, comprising: a container base of relatively rigid material; a liner laminated to the interior of said container base, said liner being permeable to allow moisture to pass therethrough; said container base defining at least one vent opening exposing the exterior surface of said liner to the exterior of said package; and means for retaining said liner in a position essentially completely enclosing an item placed in said lined container base.

Claim 2

Dependent Claim 72 words

A package, comprising: a container base of relatively rigid material; a liner laminated to the interior of said container base, said liner being permeable to allow moisture to pass therethrough; said container base defining at least one vent opening exposing the exterior surface of said liner to the exterior of said package; and means for retaining said liner in a position essentially completely enclosing an item placed in said lined container base.

Claim 3

Dependent Claim 50 words

The package of claim 1, wherein said container base comprises a bottom panel and a plurality of side panels extending generally upwardly from said bottom panel; and wherein said container base has an open top enclosed by said liner; said vent opening comprising the open top of said container base.

Claim 4

Dependent Claim 15 words

The package of claim 2, further comprising additional vent openings formed in said side panels.

Claim 5

Dependent Claim 45 words

The package of claim 1, wherein said container base encloses said item, said means for retaining said liner in a position enclosing said item comprises means for holding said base in a closed configuration, and said vent opening comprises an opening defined in said base.

Claim 6

Dependent Claim 12 words

The package of claim 4, wherein said relatively rigid material comprises paperboard.

Claim 7

Dependent Claim 27 words

The package of claim 5, wherein said liner comprises tissue paper treated with a fluorocarbon material so as to be impermeable to grease and permeable to moisture.

Claim 8

Dependent Claim 14 words

The package of claim 4, wherein said relatively rigid material comprises synthetic resinous foam.

Claim 9

Dependent Claim 11 words

The package of claim 1, wherein said liner comprises tissue paper.

Claim 10

Dependent Claim 22 words

The package of claim 1, wherein said liner comprises tissue paper treated to be impermeable to grease while being permeable to moisture.

Claim 11

Dependent Claim 15 words

The package of claim 9, wherein said tissue paper is treated with a fluorocarbon material.

Claim 12

Dependent Claim 96 words

A package, comprising: a base tray comprising paperboard or the like, including a bottom panel and one or more side panels extending upwardly from said bottom panel; a flexible liner comprising a moisture permeable material, said liner being laminated to the interior of said base, so as to cover said bottom and said one or more side panels of said base, and defining one or more cover portions extending outwardly from each of said one or more side panels; and means for securing said one or more cover portions to close said package above said base.

Claim 13

Dependent Claim 96 words

A package, comprising: a base tray comprising paperboard or the like, including a bottom panel and one or more side panels extending upwardly from said bottom panel; a flexible liner comprising a moisture permeable material, said liner being laminated to the interior of said base, so as to cover said bottom and said one or more side panels of said base, and defining one or more cover portions extending outwardly from each of said one or more side panels; and means for securing said one or more cover portions to close said package above said base.

Claim 14

Dependent Claim 27 words

The package of claim 11, wherein at least one of said side panels defines therein a vent opening exposing said liner to the exterior of said package.

Claim 15

Dependent Claim 42 words

The package of claim 11, wherein said bottom panel and side panels are rectangular, and wherein four of said side panels extend upwardly from four edges of said bottom panel and four of said cover portions extend outwardly from said side panels.

Claim 16

Dependent Claim 24 words

The package of claim 11, wherein said means for securing said cover portions forms said cover portions into a handle means above said package.

Claim 17

Dependent Claim 23 words

The package of claim 11, wherein said means for securing said cover portions comprises cohesive applied to facing surfaces of said cover portions.

Claim 18

Dependent Claim 23 words

The package of claim 11, wherein said means for securing said cover portions comprises crimped areas of said cover portions securing them together.

Claim 19

Dependent Claim 16 words

The package of claim 11, wherein said means for securing said cover portions comprises peelaway tape.

Claim 20

Dependent Claim 59 words

A composite blank for forming a package, comprising: a cross-shaped base comprising paperboard or the like, including a bottom panel and a plurality of side panels extending outwardly from said bottom panel said side panels defining vent openings therein; and a flexible, moisture permeable liner sheet laminated to said base, and extending outwardly beyond each of said side panels.

Claim 21

Dependent Claim 59 words

A composite blank for forming a package, comprising: a cross-shaped base comprising paperboard or the like, including a bottom panel and a plurality of side panels extending outwardly from said bottom panel said side panels defining vent openings therein; and a flexible, moisture permeable liner sheet laminated to said base, and extending outwardly beyond each of said side panels.

Claim 22

Independent Claim 85 words

A method of packaging a warm, vapor-producing item, comprising the steps of: laminating a moisture permeable flexible liner to the interior of a relatively rigid base container, said base container defining at least one vent opening exposing the exterior surface of said liner to the exterior of said base container; placing said item into said lined base container; and positioning said liner to essentially completely enclose said item such that vapor from said liner may pass through said liner and vent opening to the environment.

Claim 23

Independent Claim 85 words

A method of packaging a warm, vapor-producing item, comprising the steps of: laminating a moisture permeable flexible liner to the interior of a relatively rigid base container, said base container defining at least one vent opening exposing the exterior surface of said liner to the exterior of said base container; placing said item into said lined base container; and positioning said liner to essentially completely enclose said item such that vapor from said liner may pass through said liner and vent opening to the environment.

Claim 24

Dependent Claim 106 words

A package, comprising: a container base of relatively rigid material comprising at least a bottom panel and a plurality of side panels extending generally upwardly from said bottom panel; a liner laminated to the interior of said container base, said liner being permeable to moisture; said container base defining at least one vent opening exposing said liner to the exterior of said package; and means for retaining said liner in a position essentially completely enclosing an item placed in said lined container base; said container base having an open top enclosed by said liner; and said vent opening comprising the open top of said container base.

Claim 25

Dependent Claim 106 words

A package, comprising: a container base of relatively rigid material comprising at least a bottom panel and a plurality of side panels extending generally upwardly from said bottom panel; a liner laminated to the interior of said container base, said liner being permeable to moisture; said container base defining at least one vent opening exposing said liner to the exterior of said package; and means for retaining said liner in a position essentially completely enclosing an item placed in said lined container base; said container base having an open top enclosed by said liner; and said vent opening comprising the open top of said container base.

Claim 26

Dependent Claim 95 words

A package, comprising: a container base of paperboard enclosing an item placed therein; a liner laminated to the interior of said container base, said liner comprising tissue paper treated with a fluorocarbon material so as to be impermeable to grease and permeable to moisture; said container base defining at least one vent opening in said base exposing said liner to the exterior of said package; and means for holding said base in a closed configuration so as to retain said liner in a position essentially completely enclosing said item placed in said lined container base.

Claim 27

Dependent Claim 95 words

A package, comprising: a container base of paperboard enclosing an item placed therein; a liner laminated to the interior of said container base, said liner comprising tissue paper treated with a fluorocarbon material so as to be impermeable to grease and permeable to moisture; said container base defining at least one vent opening in said base exposing said liner to the exterior of said package; and means for holding said base in a closed configuration so as to retain said liner in a position essentially completely enclosing said item placed in said lined container base.

Claim 28

Dependent Claim 78 words

A package, comprising: a container base of relatively rigid material; a liner laminated to the interior of said container base, said liner comprising tissue paper treated with a fluorocarbon material to be impermeable to grease while being permeable to moisture; said container base defining at least one vent opening exposing said liner to the exterior of said package; and means for retaining said liner in a position essentially completely enclosing an item placed in said lined container base.

Claim 29

Dependent Claim 78 words

A package, comprising: a container base of relatively rigid material; a liner laminated to the interior of said container base, said liner comprising tissue paper treated with a fluorocarbon material to be impermeable to grease while being permeable to moisture; said container base defining at least one vent opening exposing said liner to the exterior of said package; and means for retaining said liner in a position essentially completely enclosing an item placed in said lined container base.

Claim 30

Dependent Claim 21 words

The package of claim 1, further comprising a plurality of vent openings defined in said base and closed by said liner.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-02-08	1991-08-10	1992-02-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-02-08	1995-08-10	1996-02-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-02-08	1999-08-10	2000-02-09	$7700.00	Window Closed / Lapsed

Vented food package with moisture permeable liner

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