US20190367250A1 - Bimaterial thermally insulated container - Google Patents
Bimaterial thermally insulated container Download PDFInfo
- Publication number
- US20190367250A1 US20190367250A1 US16/236,372 US201816236372A US2019367250A1 US 20190367250 A1 US20190367250 A1 US 20190367250A1 US 201816236372 A US201816236372 A US 201816236372A US 2019367250 A1 US2019367250 A1 US 2019367250A1
- Authority
- US
- United States
- Prior art keywords
- cup
- wall
- outer cup
- assembly
- inner cup
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 20
- 239000010935 stainless steel Substances 0.000 claims abstract description 20
- 230000009977 dual effect Effects 0.000 claims abstract description 14
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- -1 polypropylene Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 9
- 239000000796 flavoring agent Substances 0.000 description 7
- 235000019634 flavors Nutrition 0.000 description 7
- 235000013361 beverage Nutrition 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000002372 labelling Methods 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 235000020965 cold beverage Nutrition 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000012171 hot beverage Nutrition 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 108700012359 toxins Proteins 0.000 description 1
Images
Classifications
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- 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
- B65D81/38—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 with thermal insulation
- B65D81/3865—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 with thermal insulation drinking cups or like containers
- B65D81/3869—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 with thermal insulation drinking cups or like containers formed with double walls, i.e. hollow
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- B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
- B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
- B65D15/10—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of metal
- B65D15/14—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of metal with end walls made of plastics material
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- B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
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- 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
- B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
- B65D39/08—Threaded or like closure members secured by rotation; Bushes therefor
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- 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
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
- B65D43/021—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the inside, or a part turned to the inside, of the mouth
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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- B65D2543/00018—Overall construction of the lid
- B65D2543/00064—Shape of the outer periphery
- B65D2543/00074—Shape of the outer periphery curved
- B65D2543/00092—Shape of the outer periphery curved circular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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- B65D2543/00296—Plastic
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
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- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
- B65D2543/00518—Skirt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00601—Snapping means on the container
- B65D2543/00611—Profiles
- B65D2543/00638—Rolled edge
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
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- B65D2543/00601—Snapping means on the container
- B65D2543/00675—Periphery concerned
- B65D2543/00685—Totality
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00712—Snapping means on the lid
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
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- B65D2543/00712—Snapping means on the lid
- B65D2543/00787—Periphery concerned
- B65D2543/00796—Totality
Definitions
- the present invention generally relates to thermally insulated containers. More specifically, the present invention relates to double-walled thermally insulated containers.
- Thermally insulated cups and containers are well known. Methods for the production and use of thermally insulated containers, such as coffee cups, are also well known. Thermally insulated cups are widely used for both hot and cold beverages. They are designed to maintain the beverage temperature by preventing undesirable heat transfer via the beverage inside the cup to/from the atmosphere or cup holder's hand. Currently available thermally insulated cups are generally made from aluminum, stainless steel, polymeric materials and combinations thereof.
- Polymeric materials such as polypropylene, polyethylene terephthalate (PET) based polyesters and polystyrenes are widely used as container materials for thermally insulated cups because of they are known to be relatively rigid and can be dishwasher safe. In some cases, such materials also provide for promotional and branding opportunities such as via in-mold labeling and even lenticular labeling.
- PET polyethylene terephthalate
- Stainless steel vacuum insulated and stainless steel double wall coffee mugs are much better at resisting flavor retention. Additionally, such stainless steel vacuum insulated and double wall coffee mugs are generally considered to have a very attractive appearance. Stainless steel mugs may also have an advantage in their insulating qualities. With respect to the subject of safety, stainless steel is BPA free in addition to being free of other chemicals and toxins. Further, stainless steel is also rust, corrosion and stain resistant. Moreover, high quality stainless steel also tends to be resistant to bacteria and mold formation and is very resistant to retaining flavors after rinsing and/or washing. Unfortunately stainless steel mugs are often quite expensive, dent relatively easily, and are expensive and difficult to decorate permanently.
- an insulated container that provides excellent thermal insulation and barrier properties and provides a superior beverage consuming experience, that is, there is a need for insulated container that does not retain flavors. It would also be desirable to provide a product that can be conventionally decorated so that branding and promotional opportunities are possible. It would also be desirable to provide a product that is less expensive that stainless steel products and that is dent resistant.
- the present invention relates to a thermally insulated double-walled container useful for containing hot or cold products and liquids.
- Thermally insulated double-walled disposable containers in accordance with the invention provide enhanced container structural integrity, better opportunities for decoration, improved insulation and a better beverage consuming experience.
- a thermally insulated double-walled container in one aspect of the invention, includes a container body having an inner cup and an outer cup fixedly separated by a space.
- the thermally insulated double-walled container is open at the top and enclosed at the bottom.
- the space includes a gas for providing thermal insulation.
- a preferred gas is air. Insulating materials may be added to the space to enhance the thermal capabilities of the container.
- Preferred methods for making the plastic outer cup used in the insulated double-walled container include blow-molding, thermoforming or injecting molding.
- a preferred method for making the inner cup is forming the cup by pressing a sheet of stainless steel into a cup shape. The double-walled container is then created by fixedly connecting the inner cup to the outer cup to define an insulation space there between.
- FIG. 1 is a perspective view of one embodiment of a container constructed in accordance with the claimed invention.
- FIG. 2 is a cross-sectional view of one embodiment of a container constructed in accordance with the claimed invention.
- FIG. 3 is a cross-sectional view of a second embodiment of a container constructed in accordance with the claimed invention.
- FIG. 1 is a side perspective view of a container 101 manufactured in accordance with the claimed invention.
- the invention may assume various alternative orientations, except where expressly specified to the contrary.
- the specific container and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
- the claimed invention relates to a two material dual wall insulated cup 101 and method for making the same, the two material container 101 assembly having insulating ability by having at least a “dual” structure wherein an inner container 121 , in one embodiment, has a larger taper than an outer container 111 to form an insulating air layer or gap 135 between the inner container 111 and outer container 121 .
- the present invention results in numerous advantages for the insulated container 101 .
- the dual wall insulated container 101 (1) does not retain flavors between washing; (2) is at least top rack dishwasher safe; (3) is thermally insulating for comfortable handling and for maintaining the temperature of its contents; (4) is sturdy enough to withstand prolonged handling, and (5) can be decorated, preferably using conventional methods such as in-mold labeling.
- FIG. 2 shows a cross-section of a one embodiment of the present invention.
- a cup assembly 101 comprised of an outer container 111 and an inner container 121 .
- Outer container 111 has a frustoconical shape with side wall 113 .
- the smaller end of outer cup 111 is closed and sealed by bottom wall 115 .
- the larger end of outer cup 111 is open at 117 .
- outer cup 111 is molded to create a lip 119 or ring around the open end 117 .
- outer cup 111 comprises a molded material and more preferably an injected molded material.
- Outer cup 111 is typically decorated via in-mold labeling, although other methods of decoration are possible.
- Inner cup 121 is also a frustoconically shaped with side wall 123 .
- Inner cup 121 is slightly shorter in height than outer cup 111 .
- the smaller end of inner cup 121 is closed and sealed by bottom wall 125 .
- the larger end of inner cup 121 is open 127 .
- the inner cup 121 of the claimed invention comprises stainless steel.
- the periphery of the open end 127 is typically uniformly bent or curled 129 over the lip at the open end 117 of the outer cup 111 and secured to the outer cup 111 .
- a gasket 141 can be used between the lip 119 of the outer cup 111 where the inner cup 111 is curled 129 over the lip 119 of the outer cup 111 .
- Inner cup 121 may also contain surface protuberances 133 .
- inner cup 121 may have surface protuberances 133 in a threaded pattern as shown in FIG. 3 such that invention could further comprise a cover 151 further comprising a lower portion 153 comprising threads 155 complimentary to the threaded inner cup 121 .
- surface protuberances 133 could also be used to create a pressure seal with cover 151 .
- the cone angle of outer cup 111 is equal to or less than that of inner cup 121 .
- an air space or gap 135 is created between side walls 113 and 123 .
- An air gap 135 is also created between the bottom walls 115 of the inner cup 121 and the bottom wall 125 of the outer cup 111 in that inner cup 121 is shorter than the outer cup 111 .
- Contacts 137 such as those illustrated between the inner cup 121 and the outer cup 111 may provide additional support surfaces so as to maintain the rigidity of the cup 101 .
- outer cup 111 and the inner cup 121 may also be advantageous.
- coffee mugs are typically made in what is known as a “traveler” style. Traveler style coffee mugs have a base that fits within a standard-size cupholder.
- inner cup 121 may be flared outwardly at the open end 127 such that a section of the side wall 123 of inner cup 121 is in contact with the side wall 113 of the outer cup 111 . Such direct contact can enhance the structural rigidity of the cup 101 and therefore make for a more substantial feeling cup 101 .
- An adhesive could also be used to secure the inner cup 121 to the outer cup 111 . In particular, an adhesive could be used to secure the curled area 129 of the inner cup 121 over the lip 119 of the outer cup 111 .
- the size of the gap 135 between the inner cup 121 and the outer cup 111 as well as type of material and the thickness of the inner and/or outer cups have an effect on the insulating ability of the container.
- material type it is understood that a polymer with a lower thermal coefficient will result in a greater heat transmission rates. Likewise, the thinner the material, the less time it will take before heat loss begins.
- insulators such as batting situated between the inner cup 121 and the outer cup 111 may be used to improve the insulating capacity of the cup 101 .
- outer cup 111 of the claimed container assembly 101 examples include, but are not limited to, thermoplastics such as polypropylene and polyethylene, but other plastics such as polystyrene may also be used.
- inner cup 121 is food grade stainless steel.
- the container assembly 101 of the claimed invention can be produced in several different ways.
- the outer cup 11 I is injection molded. Conventional injection plastic molding techniques may be used for the outer cup 111 .
- outer cup 111 may further comprise an in-mold label or lenticular label.
- Inner cup 121 is formed of stainless steel it can be in the range of 0.009-0.05 inch and can be formed using any suitable forming technique.
- Container assembly 101 is assembled by affixing inner cup 121 to outer cup 111 such that a gap remains between inner cup side wall 123 and outer cup side wall 113 .
- inner 121 cup is placed inside outer cup 111 such that the open end 127 of stainless steel inner cup 121 protrudes slightly from the open end 117 of the plastic outer cup 111 . Excess portion of stainless steel inner cup 121 is then curled over the top of outer cup 111 or over lip 119 of outer cup 111 to form a curl 129 over the lip 119 .
- a spinning operation is used to uniformly curl the excess portion of stainless steel inner cup 121 over the lip 119 of the outer cup 111 .
- the assembly can be mounted over a metal spinning mandrel.
- a roller tool is then placed against the excess portion of the stainless steel inner cup 121 gradually bending the excess portion of the stainless inner cup 121 around the lip 119 of the outer cup 111 to form the curl 131 .
- a gasket 131 is placed under and around the lip 119 of the outer cup 111 .
- the gasket operates to seal the space between the inner cup 121 and the outer cup 111 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Abstract
The claimed invention relates to bi-material dual wall thermally insulated container. The outer wall of the dual wall insulated container is comprised of plastic and can be a decorated plastic product. The inner container is comprised of stainless steel. The inner container is fixed to the outer container creating a gap between the inner and the outer containers.
Description
- The present invention generally relates to thermally insulated containers. More specifically, the present invention relates to double-walled thermally insulated containers.
- Thermally insulated cups and containers are well known. Methods for the production and use of thermally insulated containers, such as coffee cups, are also well known. Thermally insulated cups are widely used for both hot and cold beverages. They are designed to maintain the beverage temperature by preventing undesirable heat transfer via the beverage inside the cup to/from the atmosphere or cup holder's hand. Currently available thermally insulated cups are generally made from aluminum, stainless steel, polymeric materials and combinations thereof.
- Polymeric materials, such as polypropylene, polyethylene terephthalate (PET) based polyesters and polystyrenes are widely used as container materials for thermally insulated cups because of they are known to be relatively rigid and can be dishwasher safe. In some cases, such materials also provide for promotional and branding opportunities such as via in-mold labeling and even lenticular labeling.
- Numerous methods of producing insulated plastic bottles and cups are disclosed in the prior art. However, containers made from such plastic materials often do not provide the appropriate beverage consuming experience, that is, the containers often retain flavors even when they have been thoroughly washed. Such retained flavors are likely to influence the flavor of newly poured beverages, which is highly undesirable.
- Stainless steel vacuum insulated and stainless steel double wall coffee mugs are much better at resisting flavor retention. Additionally, such stainless steel vacuum insulated and double wall coffee mugs are generally considered to have a very attractive appearance. Stainless steel mugs may also have an advantage in their insulating qualities. With respect to the subject of safety, stainless steel is BPA free in addition to being free of other chemicals and toxins. Further, stainless steel is also rust, corrosion and stain resistant. Moreover, high quality stainless steel also tends to be resistant to bacteria and mold formation and is very resistant to retaining flavors after rinsing and/or washing. Unfortunately stainless steel mugs are often quite expensive, dent relatively easily, and are expensive and difficult to decorate permanently.
- Accordingly, there is a need for an insulated container that provides excellent thermal insulation and barrier properties and provides a superior beverage consuming experience, that is, there is a need for insulated container that does not retain flavors. It would also be desirable to provide a product that can be conventionally decorated so that branding and promotional opportunities are possible. It would also be desirable to provide a product that is less expensive that stainless steel products and that is dent resistant.
- The present invention relates to a thermally insulated double-walled container useful for containing hot or cold products and liquids. Thermally insulated double-walled disposable containers in accordance with the invention provide enhanced container structural integrity, better opportunities for decoration, improved insulation and a better beverage consuming experience.
- In one aspect of the invention, a thermally insulated double-walled container includes a container body having an inner cup and an outer cup fixedly separated by a space. The thermally insulated double-walled container is open at the top and enclosed at the bottom. The space includes a gas for providing thermal insulation. A preferred gas is air. Insulating materials may be added to the space to enhance the thermal capabilities of the container. Preferred methods for making the plastic outer cup used in the insulated double-walled container include blow-molding, thermoforming or injecting molding. A preferred method for making the inner cup is forming the cup by pressing a sheet of stainless steel into a cup shape. The double-walled container is then created by fixedly connecting the inner cup to the outer cup to define an insulation space there between.
-
FIG. 1 is a perspective view of one embodiment of a container constructed in accordance with the claimed invention. -
FIG. 2 is a cross-sectional view of one embodiment of a container constructed in accordance with the claimed invention. -
FIG. 3 is a cross-sectional view of a second embodiment of a container constructed in accordance with the claimed invention. - Now referring to the drawings in detail wherein like reference numerals refer to like elements throughout,
FIG. 1 is a side perspective view of acontainer 101 manufactured in accordance with the claimed invention. However, it is to be understood that the invention may assume various alternative orientations, except where expressly specified to the contrary. It is also to be understood that the specific container and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise. - The claimed invention relates to a two material dual wall insulated
cup 101 and method for making the same, the twomaterial container 101 assembly having insulating ability by having at least a “dual” structure wherein aninner container 121, in one embodiment, has a larger taper than an outer container 111 to form an insulating air layer orgap 135 between the inner container 111 andouter container 121. The present invention results in numerous advantages for theinsulated container 101. Of primary importance to consumers of is that the dual wall insulated container 101: (1) does not retain flavors between washing; (2) is at least top rack dishwasher safe; (3) is thermally insulating for comfortable handling and for maintaining the temperature of its contents; (4) is sturdy enough to withstand prolonged handling, and (5) can be decorated, preferably using conventional methods such as in-mold labeling. -
FIG. 2 shows a cross-section of a one embodiment of the present invention. Specifically, there is acup assembly 101 comprised of an outer container 111 and aninner container 121. Outer container 111 has a frustoconical shape withside wall 113. The smaller end of outer cup 111 is closed and sealed bybottom wall 115. The larger end of outer cup 111 is open at 117. Typically, outer cup 111 is molded to create alip 119 or ring around theopen end 117. Typically, outer cup 111 comprises a molded material and more preferably an injected molded material. Outer cup 111 is typically decorated via in-mold labeling, although other methods of decoration are possible. -
Inner cup 121 is also a frustoconically shaped withside wall 123.Inner cup 121 is slightly shorter in height than outer cup 111. The smaller end ofinner cup 121 is closed and sealed bybottom wall 125. The larger end ofinner cup 121 is open 127. Typically, theinner cup 121 of the claimed invention comprises stainless steel. The periphery of theopen end 127 is typically uniformly bent or curled 129 over the lip at theopen end 117 of the outer cup 111 and secured to the outer cup 111. As shown inFIG. 3 , a gasket 141 can be used between thelip 119 of the outer cup 111 where the inner cup 111 is curled 129 over thelip 119 of the outer cup 111.Inner cup 121 may also containsurface protuberances 133. For example,inner cup 121 may havesurface protuberances 133 in a threaded pattern as shown inFIG. 3 such that invention could further comprise acover 151 further comprising alower portion 153 comprisingthreads 155 complimentary to the threadedinner cup 121. In another embodiment,surface protuberances 133 could also be used to create a pressure seal withcover 151. - In one example, the cone angle of outer cup 111 is equal to or less than that of
inner cup 121. As a result, an air space orgap 135 is created betweenside walls air gap 135 is also created between thebottom walls 115 of theinner cup 121 and thebottom wall 125 of the outer cup 111 in thatinner cup 121 is shorter than the outer cup 111.Contacts 137 such as those illustrated between theinner cup 121 and the outer cup 111 may provide additional support surfaces so as to maintain the rigidity of thecup 101. - Other shapes for both the outer cup 111 and the
inner cup 121 may also be advantageous. For example, coffee mugs are typically made in what is known as a “traveler” style. Traveler style coffee mugs have a base that fits within a standard-size cupholder. Additionally,inner cup 121 may be flared outwardly at theopen end 127 such that a section of theside wall 123 ofinner cup 121 is in contact with theside wall 113 of the outer cup 111. Such direct contact can enhance the structural rigidity of thecup 101 and therefore make for a moresubstantial feeling cup 101. An adhesive could also be used to secure theinner cup 121 to the outer cup 111. In particular, an adhesive could be used to secure the curledarea 129 of theinner cup 121 over thelip 119 of the outer cup 111. - The size of the
gap 135 between theinner cup 121 and the outer cup 111 as well as type of material and the thickness of the inner and/or outer cups have an effect on the insulating ability of the container. With respect to material type, it is understood that a polymer with a lower thermal coefficient will result in a greater heat transmission rates. Likewise, the thinner the material, the less time it will take before heat loss begins. In some cases, insulators such as batting situated between theinner cup 121 and the outer cup 111 may be used to improve the insulating capacity of thecup 101. - Examples of suitable plastics that may be used to form the outer cup 111 of the claimed
container assembly 101 include, but are not limited to, thermoplastics such as polypropylene and polyethylene, but other plastics such as polystyrene may also be used. In a preferred embodiment,inner cup 121 is food grade stainless steel. - The
container assembly 101 of the claimed invention can be produced in several different ways. Generally speaking, the outer cup 11I is injection molded. Conventional injection plastic molding techniques may be used for the outer cup 111. Optionally, outer cup 111 may further comprise an in-mold label or lenticular label.Inner cup 121 is formed of stainless steel it can be in the range of 0.009-0.05 inch and can be formed using any suitable forming technique. -
Container assembly 101 is assembled by affixinginner cup 121 to outer cup 111 such that a gap remains between innercup side wall 123 and outercup side wall 113. In one embodiment, inner 121 cup is placed inside outer cup 111 such that theopen end 127 of stainless steelinner cup 121 protrudes slightly from theopen end 117 of the plastic outer cup 111. Excess portion of stainless steelinner cup 121 is then curled over the top of outer cup 111 or overlip 119 of outer cup 111 to form acurl 129 over thelip 119. - Preferably, a spinning operation is used to uniformly curl the excess portion of stainless steel
inner cup 121 over thelip 119 of the outer cup 111. For example, once theinner cup 121 has been placed in theouter cup 121, the assembly can be mounted over a metal spinning mandrel. A roller tool is then placed against the excess portion of the stainless steelinner cup 121 gradually bending the excess portion of the stainlessinner cup 121 around thelip 119 of the outer cup 111 to form the curl 131. - In a further preferred embodiment a gasket 131 is placed under and around the
lip 119 of the outer cup 111. Thus, when the stainlessinner cup 121 is bent around the lip of the outer cup 111 to form the curl 131, the gasket operates to seal the space between theinner cup 121 and the outer cup 111. - Preferred embodiments of this invention are described herein. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.
Claims (9)
1. A dual wall cup assembly having an open end comprising:
a plastic frustoconical shaped outer cup comprising an outer cup side wall, an upper open end further comprising a lip extending circumferentially outwardly from the upper open end and a closed smaller end sealed by a bottom wall;
a stainless steel frustoconical shaped inner cup comprising an inner cup side wall, an upper open end and a closed smaller end sealed by a bottom wall;
the size of the inner cup and the angle of the inner cup wall are configured to be receivable within the outer cup to create a gap between an inner surface of the side wall of the outer cup and an outer surface of the side wall of the inner cup and the inner cup side wall is slightly taller than the height of the outer cup side when the inner cup is received within the outer cup; and
the slightly taller inner cup is curled over the lip of the upper open end of outer cup such that the outer cup and the inner cup are secured together by the curl of the inner cup over the outer cup.
2. The dual wall cup assembly of claim 1 wherein the plastic frustoconical shaped outer cup is comprised of injection molded polypropylene.
3. The dual wall cup assembly of claim 1 wherein the gap between the inner surface of the side wall of the outer cup and an outer surface of the side wall of the inner cup is relatively uniform.
4. The dual wall cup assembly of claim 1 further comprising a gasket situated below the lip of the upper open end of the outer cup operable to seal the gap between the inner cup and the outer cup when the inner cup is bent over the lid of the upper open end of the outer cup.
5. The dual wall cup assembly of claim 1 further comprising an adhesive sued to secure the outer cup to the inner cup.
6. The dual wall cup assembly of claim 1 further comprising a cover.
7. The dual wall cup assembly of claim 6 wherein the upper portion of the interior cup is threaded and the cover further comprises complimentary threads such that the cover is threadably securable to the cup.
8. The dual wall assembly of claim 1 further comprising insulating batting situated the inner cup and the outer cup.
9. The dual wall assembly of claim 1
Priority Applications (1)
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US16/236,372 US20190367250A1 (en) | 2017-12-29 | 2018-12-29 | Bimaterial thermally insulated container |
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US201762612295P | 2017-12-29 | 2017-12-29 | |
US16/236,372 US20190367250A1 (en) | 2017-12-29 | 2018-12-29 | Bimaterial thermally insulated container |
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US20190367250A1 true US20190367250A1 (en) | 2019-12-05 |
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US16/236,372 Abandoned US20190367250A1 (en) | 2017-12-29 | 2018-12-29 | Bimaterial thermally insulated container |
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Cited By (2)
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---|---|---|---|---|
CN111874407A (en) * | 2020-08-14 | 2020-11-03 | 咖法科技(上海)有限公司 | Cup with coffee grounds made of synthetic material |
US20220257036A1 (en) * | 2021-02-12 | 2022-08-18 | Sprogo Llc | Reusable beverage container assembly |
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US5660326A (en) * | 1995-08-18 | 1997-08-26 | Sherwood Tool Incorporated | Multi-layered insulated cup formed from folded sheet |
US20050098565A1 (en) * | 2003-10-27 | 2005-05-12 | Liu Yiu C. | Ceramic metallic liquid holding vessel |
US20090045194A1 (en) * | 2007-08-18 | 2009-02-19 | Rhee Jae-Woong | Double structure cup |
US20130175278A1 (en) * | 2012-01-06 | 2013-07-11 | Carl L.C. Kah, JR. | Double walled thermal container with ring seal |
US20180044499A1 (en) * | 2016-08-09 | 2018-02-15 | Hamilton Housewares Pvt. Ltd. | Reheatable and washproof container with insulation properties |
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2018
- 2018-12-29 US US16/236,372 patent/US20190367250A1/en not_active Abandoned
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US5660326A (en) * | 1995-08-18 | 1997-08-26 | Sherwood Tool Incorporated | Multi-layered insulated cup formed from folded sheet |
US20050098565A1 (en) * | 2003-10-27 | 2005-05-12 | Liu Yiu C. | Ceramic metallic liquid holding vessel |
US20090045194A1 (en) * | 2007-08-18 | 2009-02-19 | Rhee Jae-Woong | Double structure cup |
US20130175278A1 (en) * | 2012-01-06 | 2013-07-11 | Carl L.C. Kah, JR. | Double walled thermal container with ring seal |
US20180044499A1 (en) * | 2016-08-09 | 2018-02-15 | Hamilton Housewares Pvt. Ltd. | Reheatable and washproof container with insulation properties |
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CN111874407A (en) * | 2020-08-14 | 2020-11-03 | 咖法科技(上海)有限公司 | Cup with coffee grounds made of synthetic material |
US20220257036A1 (en) * | 2021-02-12 | 2022-08-18 | Sprogo Llc | Reusable beverage container assembly |
US11779156B2 (en) * | 2021-02-12 | 2023-10-10 | Sprogo Llc | Reusable beverage container assembly |
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