WO2023092017A1 - Inertia water separator food packaging - Google Patents

Inertia water separator food packaging Download PDF

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Publication number
WO2023092017A1
WO2023092017A1 PCT/US2022/080061 US2022080061W WO2023092017A1 WO 2023092017 A1 WO2023092017 A1 WO 2023092017A1 US 2022080061 W US2022080061 W US 2022080061W WO 2023092017 A1 WO2023092017 A1 WO 2023092017A1
Authority
WO
WIPO (PCT)
Prior art keywords
food
air
parallel passageways
absorbent layer
gap
Prior art date
Application number
PCT/US2022/080061
Other languages
French (fr)
Inventor
William Birgen
Original Assignee
SAVR Pak Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SAVR Pak Inc. filed Critical SAVR Pak Inc.
Publication of WO2023092017A1 publication Critical patent/WO2023092017A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/264—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/14—Non-removable lids or covers
    • B65D43/16—Non-removable lids or covers hinged for upward or downward movement
    • B65D43/162—Non-removable lids or covers hinged for upward or downward movement the container, the lid and the hinge being made of one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/64—Lids
    • B65D5/66—Hinged lids
    • B65D5/6626—Hinged lids formed by folding extensions of a side panel of a container body formed by erecting a "cross-like" blank
    • B65D5/665—Hinged lids formed by folding extensions of a side panel of a container body formed by erecting a "cross-like" blank the lid being held in closed position by self-locking integral flaps or tabs
    • B65D5/6661—Flaps provided over the total length of the lid edge opposite to the hinge
    • B65D5/6664—Flaps provided over the total length of the lid edge opposite to the hinge combined with flaps or tabs provided at the side edges of the lid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
    • B65D2585/30—Containers, packaging elements or packages specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
    • B65D2585/36—Containers, packaging elements or packages specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for biscuits or other bakery products
    • B65D2585/363—Containers, packaging elements or packages specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for biscuits or other bakery products specific products
    • B65D2585/366—Pizza

Definitions

  • This invention relates to keeping food dry.
  • this invention relates to keeping food from absorbing ambient moisture and becoming soggy.
  • This invention removes air moisture from inside a hot food container by first straightening the convection air flow rising above hot food, and second redirecting the rising air at a sharp turn, forcing the momentum of the heavier water-laden air to continue a straight trajectory into an absorbent pad or similar material, where the water from the air collides with the absorbent surface and is trapped. In this way, the invention extracts water from the air, before it can condense on food, thereby preventing the food to from becoming soggy.
  • the invention is embodied in a food storage comprising four principal elements: (a) a housing for enclosing hot food, (b) a plurality of parallel passageways mounted inside the housing, (c) an absorbent layer positioned above the plurality of parallel passageways, and (d) a gap between the plurality of parallel passageways and the absorbent layer.
  • Fig. 1 illustrates a perspective view of a pizza box embodiment with an open lid.
  • Fig. 2 illustrates a perspective view of the pizza box of Fig. 1 cut along A- A.
  • Fig. 3 illustrates a side view of the pizza box of Fig. 1 cut along A-A.
  • Fig. 4 illustrates a section view of a closed pizza box embodiment.
  • Fig. 5 illustrates a bottom perspective view from inside the pizza box of Fig. 4.
  • Fig. 6 illustrates a perspective view of the preferred embodiment of (a) a plurality of parallel passageways for mounting inside the housing, (b) an absorbent layer positioned above the plurality of parallel passageways, and (c) a gap between the plurality of parallel passageways and the absorbent layer.
  • Fig. 7 illustrates a side view of the preferred embodiment of the invention shown in Fig. 6.
  • Fig. 8 illustrates an embodiment for creating the plurality of parallel passageways.
  • Fig. 9 illustrates an embodiment located within a clamshell-type to-go box.
  • Fig. 10 illustrates a section view of a closed pizza box embodiment with arrows showing how air flows inside the box.
  • FIG. 1 A preferred embodiment of the invention is shown in Figs. 1- 7.
  • the invention is embodied in a food storage device 10 comprising four principal elements: (a) a housing 14 for enclosing hot food, (b) a plurality of parallel passageways 18 mounted inside the housing 14, (c) an absorbent layer 22 positioned above the plurality of parallel passageways 18, and (d) a gap 26 between the plurality of parallel passageways 18 and the absorbent layer 22.
  • the housing 14 would typically be a fast-food container, such as a pizza box or a Styrofoam takeout box. But it could be any container that houses food.
  • the housing 14 could be a plastic container with a press-fit lid, it could be a cardboard box, or it could be a more rigid container.
  • a pizza box embodiment is shown in Figs. 1-5 and a clam-shell style embodiment is shown in Fig. 9.
  • the plurality of passageways 18 could be shaped in a variety of ways.
  • the preferred plurality of parallel passageways 18 is created by a flow-straightening grid 48 as shown in Fig. 5. But any structure that straightens air flow would work. Flow straighteners are well-known to those in the art.
  • the passageways 18 could be hyperboloids, venturis, cylindrical tubes, hex tubes, square tubes, etc. It is preferred that the parallel passageways be at least 0.5 inches long, though the length is ideally determined by the ratio of the length of the tubes divided by the hydraulic diameter of the tube cross sectional shape. This length divided by hydraulic diameter ratio is preferred to fall within the range 4 to 9.
  • screens in lieu of tubes, are also effective at decreasing turbulence. Screens are less effective than tubes at straightening the air flow but offer an economical embodiment with the same benefits, diminished such as they are.
  • FIG. 8 A preferred embodiment of the plurality of passageways 1 is shown in Fig. 8. As illustrated, this embodiment is made by starting with a comb-shaped piece 40.
  • the comb-shaped piece 40 has a plurality of slots 42.
  • the comb-shaped pieces can be fit together to form a grid 48, which results in a plurality of parallel passageways 18 as shown in Fig. 8.
  • An alternate embodiment for the plurality of parallel passageways 18 may be more elaborate than the square channel system illustrated. Ideal hyperboloid chimney geometry has the benefit of accelerating the hot (wet) vapor beyond the air flow (velocity) crated by natural convection. This accelerated flow means increased momentum; meaning more water extraction.
  • Another alternate embodiment for the passageways 18 could invoke venturi principles to accelerate the airflow beyond the limits of natural convection air flow, increasing momentum and increasing the efficacy of water extraction from the air. Dry air turns and flows unhindered by water as it exits the flow straightener and then returning to a container's air volume below. By drying the air, without venting, the food is dyer, to be certain, but it is hotter. Venting food containers allows colder ambient air to enter food containers and subsequently cool the food.
  • Another important element of the invention is the gap 26 between the exit end 34 of the parallel passageways 18 and the absorbent layer 22.
  • This gap 26 allows lighter dry air to turn and avoid the absorbent layer 22. Wet, heavier air has too much momentum to make this same turn as the dry air. The linear momentum of the wet air propels it, i.e. slings it, into an absorbent layer 22, which traps the water. This inertial water separator creates a dryer environment inside the sealed food container.
  • the absorbent layer (i.e., hygroscopic element) 22 may be made from any absorbent material, such as airlaid, sponge, cotton, paper, hemp, linen, plant cellulose, etc.
  • the device can be constructed in various ways. It is preferred to construct the plurality of parallel passageways 22 from cardboard in a shape that creates a relatively rigid “honeycomb.” An embodiment of the plurality of passageways is shown in Fig. 8. While a rectangular grid-like shape is presently preferred, other configurations could also work.
  • the grid can be constructed from a variety of materials including metal, cardboard, still paper, or any other material that can hold a grid-like shape.
  • the gap 26 can be created using bracket 30 to keep a fixed distance between the absorbent layer 22 and the exit end 34 of the passageways 18. It is preferred to use cardboard for the brackets 30.
  • One end of the bracket 30 is preferably connected to the plurality of parallel passageways 18 using an adhesive or other known fastener.
  • the other end of the bracket 30 can be connected to a plate 38 that is connected to (and holds) the absorbent layer 22.
  • the brackets 30 create the gap 26. Plate 38 can then be connected to the inside face of the food container via adhesive or other connecting material known in the art.
  • the air gap 26 at the exit 34 of the flow straightener can be larger at the perimeter of the grid and smaller at the center of the grid. This varied gap 26 allows for easier airflow of the dry air as it moves outward away from the center. The dry air will naturally mix with the rest of the air inside the food container.
  • FIGs. 1-7 preferably uses an adhesive surface to secure/attach both the absorbent element and the cardboard brackets which suspend the cardboard flow straightening grid.
  • the preferred material for this embodiment is cardboard for the flow straightener grid and the brackets, and there are many adhesive options, should an adhesive be used to secure the assembly to the inside of the food container.
  • brackets to suspend the flow straightener it may be held in place with locking tabs, or Velcro, buttons, snaps, guy wire, elastic, etc. What is important is the gap 26. It is preferred that the gap 26 be at least 0.5 inches.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Packages (AREA)

Abstract

This invention removes air moisture from inside a hot food container by first straightening the convection air flow rising above hot food, and second redirecting the rising air at a sharp turn, forcing the momentum of the heavier water-laden air to continue a straight trajectory into an absorbent pad or similar material, where the water from the air collides with the absorbent surface and is trapped. In this way, the invention extracts water from the air, before it can condense on food, thereby preventing the food to from becoming soggy. The invention is embodied in a food storage comprising four principal elements: (a) a housing for enclosing hot food, (b) a plurality of parallel passageways mounted inside the housing, (c) an absorbent layer positioned above the plurality of parallel passageways, and (d) a gap between the plurality of parallel passageways and the absorbent layer.

Description

Inertia Water Separator Food Packaging
Field of the Invention:
[001] This invention relates to keeping food dry. In particular, this invention relates to keeping food from absorbing ambient moisture and becoming soggy.
Background:
[002] Food stored temporarily for delivery, or stored long term, can be ruined by condensation forming on the food. If hot food is placed in a container, hot vapor, including air and water, rises upward from the food.
[003] Other inventions, such as United States patent application for a Container US20120024859A1 (Longoni et. al) try to vent wet vapor, which allows heat to escape. These vented container solutions are marginally effective at removing moisture, i.e. condensation, while allowing cold ambient air to quickly cool the food.
Summary
[004] This invention removes air moisture from inside a hot food container by first straightening the convection air flow rising above hot food, and second redirecting the rising air at a sharp turn, forcing the momentum of the heavier water-laden air to continue a straight trajectory into an absorbent pad or similar material, where the water from the air collides with the absorbent surface and is trapped. In this way, the invention extracts water from the air, before it can condense on food, thereby preventing the food to from becoming soggy.
[005] The invention is embodied in a food storage comprising four principal elements: (a) a housing for enclosing hot food, (b) a plurality of parallel passageways mounted inside the housing, (c) an absorbent layer positioned above the plurality of parallel passageways, and (d) a gap between the plurality of parallel passageways and the absorbent layer. Brief Description of the Drawings
[006] The objects, features and advantages of the present invention will be more readily appreciated upon reference to the following disclosure when considered in conjunction with the accompanying drawings, wherein reference numerals are used to identify the components in the various views.
[007] Fig. 1 illustrates a perspective view of a pizza box embodiment with an open lid.
[008] Fig. 2 illustrates a perspective view of the pizza box of Fig. 1 cut along A- A.
[009] Fig. 3 illustrates a side view of the pizza box of Fig. 1 cut along A-A.
[010] Fig. 4 illustrates a section view of a closed pizza box embodiment.
[011] Fig. 5 illustrates a bottom perspective view from inside the pizza box of Fig. 4.
[012] Fig. 6 illustrates a perspective view of the preferred embodiment of (a) a plurality of parallel passageways for mounting inside the housing, (b) an absorbent layer positioned above the plurality of parallel passageways, and (c) a gap between the plurality of parallel passageways and the absorbent layer.
[013] Fig. 7 illustrates a side view of the preferred embodiment of the invention shown in Fig. 6.
[014] Fig. 8 illustrates an embodiment for creating the plurality of parallel passageways.
[015] Fig. 9 illustrates an embodiment located within a clamshell-type to-go box.
[016] Fig. 10 illustrates a section view of a closed pizza box embodiment with arrows showing how air flows inside the box.
Detailed Description of Preferred Embodiment
[017] A preferred embodiment of the invention is shown in Figs. 1- 7. The invention is embodied in a food storage device 10 comprising four principal elements: (a) a housing 14 for enclosing hot food, (b) a plurality of parallel passageways 18 mounted inside the housing 14, (c) an absorbent layer 22 positioned above the plurality of parallel passageways 18, and (d) a gap 26 between the plurality of parallel passageways 18 and the absorbent layer 22.
[018] The housing 14 would typically be a fast-food container, such as a pizza box or a Styrofoam takeout box. But it could be any container that houses food. For example, the housing 14 could be a plastic container with a press-fit lid, it could be a cardboard box, or it could be a more rigid container. A pizza box embodiment is shown in Figs. 1-5 and a clam-shell style embodiment is shown in Fig. 9.
[019] The plurality of passageways 18 could be shaped in a variety of ways. The preferred plurality of parallel passageways 18 is created by a flow-straightening grid 48 as shown in Fig. 5. But any structure that straightens air flow would work. Flow straighteners are well-known to those in the art. The passageways 18 could be hyperboloids, venturis, cylindrical tubes, hex tubes, square tubes, etc. It is preferred that the parallel passageways be at least 0.5 inches long, though the length is ideally determined by the ratio of the length of the tubes divided by the hydraulic diameter of the tube cross sectional shape. This length divided by hydraulic diameter ratio is preferred to fall within the range 4 to 9. In addition, screens, in lieu of tubes, are also effective at decreasing turbulence. Screens are less effective than tubes at straightening the air flow but offer an economical embodiment with the same benefits, diminished such as they are.
[020] A preferred embodiment of the plurality of passageways 1 is shown in Fig. 8. As illustrated, this embodiment is made by starting with a comb-shaped piece 40. The comb-shaped piece 40 has a plurality of slots 42. The comb-shaped pieces can be fit together to form a grid 48, which results in a plurality of parallel passageways 18 as shown in Fig. 8.
[021] An alternate embodiment for the plurality of parallel passageways 18 (aka flow straightener) may be more elaborate than the square channel system illustrated. Ideal hyperboloid chimney geometry has the benefit of accelerating the hot (wet) vapor beyond the air flow (velocity) crated by natural convection. This accelerated flow means increased momentum; meaning more water extraction. [022] Another alternate embodiment for the passageways 18 could invoke venturi principles to accelerate the airflow beyond the limits of natural convection air flow, increasing momentum and increasing the efficacy of water extraction from the air. Dry air turns and flows unhindered by water as it exits the flow straightener and then returning to a container's air volume below. By drying the air, without venting, the food is dyer, to be certain, but it is hotter. Venting food containers allows colder ambient air to enter food containers and subsequently cool the food.
[023] Another important element of the invention is the gap 26 between the exit end 34 of the parallel passageways 18 and the absorbent layer 22. This gap 26 allows lighter dry air to turn and avoid the absorbent layer 22. Wet, heavier air has too much momentum to make this same turn as the dry air. The linear momentum of the wet air propels it, i.e. slings it, into an absorbent layer 22, which traps the water. This inertial water separator creates a dryer environment inside the sealed food container.
[024] The absorbent layer (i.e., hygroscopic element) 22 may be made from any absorbent material, such as airlaid, sponge, cotton, paper, hemp, linen, plant cellulose, etc.
[025] The device can be constructed in various ways. It is preferred to construct the plurality of parallel passageways 22 from cardboard in a shape that creates a relatively rigid “honeycomb.” An embodiment of the plurality of passageways is shown in Fig. 8. While a rectangular grid-like shape is presently preferred, other configurations could also work. The grid can be constructed from a variety of materials including metal, cardboard, still paper, or any other material that can hold a grid-like shape.
[026] The gap 26 can be created using bracket 30 to keep a fixed distance between the absorbent layer 22 and the exit end 34 of the passageways 18. It is preferred to use cardboard for the brackets 30. One end of the bracket 30 is preferably connected to the plurality of parallel passageways 18 using an adhesive or other known fastener. The other end of the bracket 30 can be connected to a plate 38 that is connected to (and holds) the absorbent layer 22. The brackets 30 create the gap 26. Plate 38 can then be connected to the inside face of the food container via adhesive or other connecting material known in the art. [027] In an alternative embodiment, the air gap 26 at the exit 34 of the flow straightener can be larger at the perimeter of the grid and smaller at the center of the grid. This varied gap 26 allows for easier airflow of the dry air as it moves outward away from the center. The dry air will naturally mix with the rest of the air inside the food container.
[028] The embodiment illustrated in Figs. 1-7 preferably uses an adhesive surface to secure/attach both the absorbent element and the cardboard brackets which suspend the cardboard flow straightening grid.
[029] The preferred material for this embodiment is cardboard for the flow straightener grid and the brackets, and there are many adhesive options, should an adhesive be used to secure the assembly to the inside of the food container. In lieu of brackets to suspend the flow straightener, it may be held in place with locking tabs, or Velcro, buttons, snaps, guy wire, elastic, etc. What is important is the gap 26. It is preferred that the gap 26 be at least 0.5 inches.
[030] As illustrated by Fig. 10, ambient moisture from inside a hot food container rises 50 from the food 52. After straightening the convection air flow rising above hot food via the parallel passageways 18, drier air makes a sharp turn 54. The heavier water-laden air to continues a straight trajectory into an absorbent pad 22 or similar material. In this way, the invention extracts water from the air, before it can condense on food, causing the food to become soggy.
[031] While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those ordinarily skilled in the art without departing from the score and spirit disclosed herein.

Claims

CLAIMS A food storage device for keeping hot food dry, the device comprising: a housing for enclosing hot food, a plurality of parallel passageways mounted inside the housing, an absorbent layer positioned above the plurality of parallel passageways, and a gap between the plurality of parallel passageways and the absorbent layer. The food storage device of claim 1, the plurality of parallel passageways comprising a length of at least 0.5 inches. The food storage device of claim 1, wherein the gap is at least 0.5 inches. The food storage device of claim 1, wherein a passageway comprises a length and a cross-sectional area, the ratio of length to cross-sectional area within a range of 4 to 9. A device for connecting to the inside of a food container, the device comprising: a grid comprising a plurality of parallel passageways, a bracket connected to the grid, an absorbent layer connected to the bracket, wherein there is a gap between the grid and the absorbent layer. The device of claim 5, a passageway comprises a length of at least 0.5 inches. The device of claim 5, wherein the gap is at least 0.5 inches. The device of claim 5, wherein a passageway comprises a length and a cross-sectional area, the ratio of length to cross-sectional area within a range of 4 to 9.
6
PCT/US2022/080061 2021-11-21 2022-11-17 Inertia water separator food packaging WO2023092017A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163281698P 2021-11-21 2021-11-21
US63/281,698 2021-11-21

Publications (1)

Publication Number Publication Date
WO2023092017A1 true WO2023092017A1 (en) 2023-05-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698320A (en) * 1923-10-26 1929-01-08 John E Sharp Hygroscopic pad and holder for confection jars
US20060219578A1 (en) * 2005-03-30 2006-10-05 Cryovac, Inc. Product support assembly adapted to absorb liquids exuded from a product
US20130056369A1 (en) * 2011-09-03 2013-03-07 Antoinette K. Jorgensen Hot food container moisture absorbent insert
US20200039725A1 (en) * 2018-08-02 2020-02-06 Kevin R. Parsons Moisture wicking food container
US11001432B1 (en) * 2014-05-15 2021-05-11 SAVR Pak Inc. Food container with forced moisture removal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698320A (en) * 1923-10-26 1929-01-08 John E Sharp Hygroscopic pad and holder for confection jars
US20060219578A1 (en) * 2005-03-30 2006-10-05 Cryovac, Inc. Product support assembly adapted to absorb liquids exuded from a product
US20130056369A1 (en) * 2011-09-03 2013-03-07 Antoinette K. Jorgensen Hot food container moisture absorbent insert
US11001432B1 (en) * 2014-05-15 2021-05-11 SAVR Pak Inc. Food container with forced moisture removal
US20200039725A1 (en) * 2018-08-02 2020-02-06 Kevin R. Parsons Moisture wicking food container

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