CA1292432C - Insulated carry bag - Google Patents
Insulated carry bagInfo
- Publication number
- CA1292432C CA1292432C CA000541701A CA541701A CA1292432C CA 1292432 C CA1292432 C CA 1292432C CA 000541701 A CA000541701 A CA 000541701A CA 541701 A CA541701 A CA 541701A CA 1292432 C CA1292432 C CA 1292432C
- Authority
- CA
- Canada
- Prior art keywords
- bag
- carry
- carry bag
- parts
- expanded
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract 2
- 229920006248 expandable polystyrene Polymers 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 2
- 238000004220 aggregation Methods 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims 4
- 239000011324 bead Substances 0.000 claims 1
- 239000011236 particulate material Substances 0.000 abstract 2
- 239000008188 pellet Substances 0.000 description 27
- 239000007779 soft material Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 239000003562 lightweight material Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Landscapes
- Packages (AREA)
Abstract
ABSTRACT
An insulated carry bag comprising an inner liner bag within an outer cover bag with the open ends of the bags joined to form a neck with neck closure means. There is filling of particulate material between the inner and outer bags. The inner and outer bags are made of flexible sheet material allowing the carry bag to adopt the shape of an article housed therein and the sheet material and the particulate material are capable of maintaining a static electical surface charge sufficient to cause the material to adhere to the surfaces of the inner and/or outer bags.
An insulated carry bag comprising an inner liner bag within an outer cover bag with the open ends of the bags joined to form a neck with neck closure means. There is filling of particulate material between the inner and outer bags. The inner and outer bags are made of flexible sheet material allowing the carry bag to adopt the shape of an article housed therein and the sheet material and the particulate material are capable of maintaining a static electical surface charge sufficient to cause the material to adhere to the surfaces of the inner and/or outer bags.
Description
~;~9;~:~3;~
\
" AN I NS ULATED CARRY B AG "
This invention relates to carry bags to transport and maintain goods which are initially above or below ambient temperature at or close to their initial temperature.
In the past one form of insulated container for the above purpose has had a rigid physical form and the heated or chilled goods to be transported have been placed in the container and a closure has been applied to isolate the atmosphere within the container from outside atmospheric conditions. After the closure of the container there is an averaging-out heat exchange between the goods and the space not occupied by the goods to provide a temperature within the container different to that of the outside air and the initial temperature of the goods.
In another form of insulated container, which is general of a "bag" form, flexible but semi-rigid sides of the bag are interconnected by hinge folds allowing the bag to expand to accept large objects and contract to a smaller size for smaller objects. There is however still a large amount of unoccupied space within the container when goods are located therein and the closure of the container is applied. Again there is an averaging-ou-t of the temperature of the atmosphere within the container and the goods within the Z92~32 container after the closure thereof.
This invention has as its object the provision of a bag which will substantially completely embrace goods housed within it and so minimise the amount of air within the bag. As there is very little air in the bag there will be a minimal hea~ loss or heat gain to the air in the bag and this ensures that the atmospheri~
temperature within the bag will closely approximate that of the goods located therein.
The carry bag as proposed comprises generally an inner bag and an outer with insulating means therebetween. The inner and outer bays are made from soft material. The term soft material as used herein means a flexible sheet material with substnatially no body rigidity which can be formed into a bag able to adopt any configuration within the limits determinecl by its physical shape and size. Soft materials as hereinbefore defined are preferably selected from the group comprising woven or non-woven fabric sheet materials and sheet plastics material. Preferably also the inner hag material ls ~aterproof, Broadly, the present invention can be sa-ld to comprise an insulated carry bay with sub,stantially no resistance to manual reformation from a substantially cylindrical shape which is the normal expanded configuration of the carry bag to a shape corresponding to that of an article or an aggregation of articles housed in the carry bag, said carry bag comprising an outer bag 29~3~
7057~-18 part made of flexible sheet matexial and of generally cylindrical shape when expanded and which is closed at one end and open at the other end, an inner bag part of generally cylindrical shape when expanded and which is closed at one end ancl open at the other end, the inner bag part being smaller ln diameter and shorter in length than the outer bag part and the perimeters of the open ends of the inner and outer bag parts being joined to form a mouth ~or the carry bag and this join providing the only connection between the outer and inner bag parts, drawstring closure means for the mouth of the carry bag, thermal lnsulating material in particulate form being provided in the hollow region defined by the outer bag part and inner bag part, the quantity of said particulate being at least sufficient to form a layer of insulation over the exterior surface of the inner bag part when it is expanded to cylindrical shape but less than the difference in volume of the region between the expanded form of the inner and ou~er bag parts.
Two presently preferred forms of the invention will now be described with reference to the accompanying drawings in which:-Figure 1 is a perspectlve view of the carry bag in a mouth closed configuration,Figure 2 is a perspective view in a mouth open configuration, Figure 3 is a sect.lonal elevation on the section line 3-3 of Figure 2, Figure 4 is a view similar to Figure 3 with a bottle housed in the carry bag, ~, ~29~3i~:
70~78-18 Figure 5 is a view similar to Figure 3 of an alternate construction~ and Figure 6 is a perspective view of a second form of the invention.
Re~er.ring to the drawings the carry bag Comprises an ou~er ~292~3;;~
bag l made of a soft material as hereinbefore defined and in the present example is made from plastic coated woven fabric with sewn joints, although welded or heat sealed joints can be used. Inside the outer bag l there is an inner bag 2 made of soft material as hereinbefore defined and in the present example is made of laminated polyethylene sheet material again with sewn joints although welded or heat sealed joints can be used. The inner bag 2 preferably has a capacity when opened up which is less than that of the inner bag l as can be readily seen from Fig.3. The inner and outer bags have openings therein and the peripheries of the openings are fastened together, as by sewing or adhesive, to form a mouth 3 for the carry bag. The bag materials may have a limited degree of elastic stretch to facilitate accomodation of irregularly shaped objects placed within the carry bag.
There are eyelets 5 around the upper end of the carry bag adjacent the mouth thereof. A draw string 6 is provided whereby the mouth of the carry bag can be closed to retain a object housed within the carry bag or about portion of an object protruding through the mouth of the carry bag, as for example the neck of a bot-t]e.
Housed between the inner and outer bags there is insulation material in the Eorm of pellets 4. The pellets 4 are ~ ~ ~z~ 3~:
preferably of random diameter within a predetermined range and are made of foamed polystyrene. The pellets may however be formed of other materials such as crumbed or granulated foam plastics material having the qualities of foamed polystyrene pellets as are hereinafter set out. The number of pellets 4 should be such that there is a least sufficient to provide a single skin of pellets about substantially all of the exterior of the inner bag when an object is housed in the carry bag. In Fig.3 it will be seen that there will be a natural tendancy for the pellets to migrate to the bottom section of the carry bag when unoccupied. Fig.4 indicates how a pellet redistribution will take place when an object is positioned in the carry bag. The redistribution can be likened to a fluid flow of the pellets which will migrate from a zone where pressure is exerted to a zone of lesser prssure.
Fig.5 illustrates an alternate arrangement where there is an intermediate bag identified 7 with the opend ends of the bags l,2 and 7 fixed together to form the carry bag mouth 3.
The bag 7 has several uses. For example, it can be used to separate two zones occupied by pellets 4 thereby providing additional insulation for the carry bag whilst controlling the locatlon o~ the pellets in two "skins" around the object within the carry bag. The bag 7 need not be made of any particular material, Eor example it need not be waterproof.
-` ~2~ 3;~:
It can be in the form of a net which is strong and have openings small enough to prevent pellets migrating from one skin to the other. The bag 7 may be made oE inextensible strong material or net and provide the strength of the carry bag and relieve the inner and outer bags of the stretching forces that will occur if a heavy object is transported in the carry bag and it is supported by the draw string 6.
With such an arrangement the inner and outer bags could be relatively thin and decorative light weight material could be used for the outer bag and waterproof light weight material could be used for the inner bag.
In an alternate arrangement the inner and/or outer bags may have reinforcement strips affixed thereto to provide load support for objects carried in the carry bag thereby substantially elimlnating tension loads on the inner and/or outer bags. The intermediate bag 7 may also be in the form of a large mesh or grid which will allow free migration of the pellets between the inner and ou-ter bags.
Preferably the material Erom which the inner and outer bags is made is such as to have an electostatic affinity with the pellets ~, as may be promoted simply by frictional contact between polystyrene pellets and -the inner and outer bags.
The electrostatic attraction between the pellets and the material from which the inner and outer bags is made ` :~L29Z~3~
promotes the formation of a layer of pellets on the outer surface of the inner bag.
As will be understood the form of the carry bag substantially eliminates unoccupied air space within the carry bag and so there is little heat exchange between an object in the carry bag and the atmosphere within the carry bag. This is promoted by the support oE the carry bag and contents by the draw string 6. The result is improved temperature retention for the object in the carry bag.
Where an object or a number of objects are inserted into the carry bag assembly, e.g. a bottle of wine, or several cans of beer, or an irregular object such as a box or packet is and the closed bag assembly is left lying on a surface the natural tendancy is for the bag assembly to slump, due to the flexible nature of the bag materials. This also substantially eliminates empty space from within the bag assembly with resultant efficient temperature retention by the object(s) within the carry bag.
With irregular or regular shaped objects the placement of the object within the bag assembly will cause the flow of pellets between the bags. For example, if a bag assembly is lying on a table a majority of the pellets surplus to those electrostatically adhering to the inner bag will probably be Z~32 in the lowermost portion of the bag assembly. By placing a bottle in the bag assembly the weight of the bottle and the natural shuffling of the pellets as the bottle in posi-tioned within the carry bag will result in a generally uniform distribution of the pellets around the bottle as the pellets flow freely between the bags. The distribution of the pellets into a moulded consolidated sleeve around the bottle is further promoted by the application of tightening pressuré to the drawstring provided as part of the carry bag, In another example, if an object was thrust into a bag assembly sitting on its closed end, with the majority of the pellets not electrostatically adhering to the inner bag gathered at the closed end, the action of thrusting the object into the bag and the gravitational effect on the object will cause the pellets to flow upwardly over each other to form a skin several pellets thick around the object. The capacity of the pellets to flow between the bags and so allow the bag to adapt to accomodate objects oE
differing shapes and sizes provides an advantage over known containers for the defined purpose.
The foregoing example can be varied as shown in Fig.6 to have a different shape to that of the example illustrated in Figs.l to 5 whilst having the same physical characteristics.
\
" AN I NS ULATED CARRY B AG "
This invention relates to carry bags to transport and maintain goods which are initially above or below ambient temperature at or close to their initial temperature.
In the past one form of insulated container for the above purpose has had a rigid physical form and the heated or chilled goods to be transported have been placed in the container and a closure has been applied to isolate the atmosphere within the container from outside atmospheric conditions. After the closure of the container there is an averaging-out heat exchange between the goods and the space not occupied by the goods to provide a temperature within the container different to that of the outside air and the initial temperature of the goods.
In another form of insulated container, which is general of a "bag" form, flexible but semi-rigid sides of the bag are interconnected by hinge folds allowing the bag to expand to accept large objects and contract to a smaller size for smaller objects. There is however still a large amount of unoccupied space within the container when goods are located therein and the closure of the container is applied. Again there is an averaging-ou-t of the temperature of the atmosphere within the container and the goods within the Z92~32 container after the closure thereof.
This invention has as its object the provision of a bag which will substantially completely embrace goods housed within it and so minimise the amount of air within the bag. As there is very little air in the bag there will be a minimal hea~ loss or heat gain to the air in the bag and this ensures that the atmospheri~
temperature within the bag will closely approximate that of the goods located therein.
The carry bag as proposed comprises generally an inner bag and an outer with insulating means therebetween. The inner and outer bays are made from soft material. The term soft material as used herein means a flexible sheet material with substnatially no body rigidity which can be formed into a bag able to adopt any configuration within the limits determinecl by its physical shape and size. Soft materials as hereinbefore defined are preferably selected from the group comprising woven or non-woven fabric sheet materials and sheet plastics material. Preferably also the inner hag material ls ~aterproof, Broadly, the present invention can be sa-ld to comprise an insulated carry bay with sub,stantially no resistance to manual reformation from a substantially cylindrical shape which is the normal expanded configuration of the carry bag to a shape corresponding to that of an article or an aggregation of articles housed in the carry bag, said carry bag comprising an outer bag 29~3~
7057~-18 part made of flexible sheet matexial and of generally cylindrical shape when expanded and which is closed at one end and open at the other end, an inner bag part of generally cylindrical shape when expanded and which is closed at one end ancl open at the other end, the inner bag part being smaller ln diameter and shorter in length than the outer bag part and the perimeters of the open ends of the inner and outer bag parts being joined to form a mouth ~or the carry bag and this join providing the only connection between the outer and inner bag parts, drawstring closure means for the mouth of the carry bag, thermal lnsulating material in particulate form being provided in the hollow region defined by the outer bag part and inner bag part, the quantity of said particulate being at least sufficient to form a layer of insulation over the exterior surface of the inner bag part when it is expanded to cylindrical shape but less than the difference in volume of the region between the expanded form of the inner and ou~er bag parts.
Two presently preferred forms of the invention will now be described with reference to the accompanying drawings in which:-Figure 1 is a perspectlve view of the carry bag in a mouth closed configuration,Figure 2 is a perspective view in a mouth open configuration, Figure 3 is a sect.lonal elevation on the section line 3-3 of Figure 2, Figure 4 is a view similar to Figure 3 with a bottle housed in the carry bag, ~, ~29~3i~:
70~78-18 Figure 5 is a view similar to Figure 3 of an alternate construction~ and Figure 6 is a perspective view of a second form of the invention.
Re~er.ring to the drawings the carry bag Comprises an ou~er ~292~3;;~
bag l made of a soft material as hereinbefore defined and in the present example is made from plastic coated woven fabric with sewn joints, although welded or heat sealed joints can be used. Inside the outer bag l there is an inner bag 2 made of soft material as hereinbefore defined and in the present example is made of laminated polyethylene sheet material again with sewn joints although welded or heat sealed joints can be used. The inner bag 2 preferably has a capacity when opened up which is less than that of the inner bag l as can be readily seen from Fig.3. The inner and outer bags have openings therein and the peripheries of the openings are fastened together, as by sewing or adhesive, to form a mouth 3 for the carry bag. The bag materials may have a limited degree of elastic stretch to facilitate accomodation of irregularly shaped objects placed within the carry bag.
There are eyelets 5 around the upper end of the carry bag adjacent the mouth thereof. A draw string 6 is provided whereby the mouth of the carry bag can be closed to retain a object housed within the carry bag or about portion of an object protruding through the mouth of the carry bag, as for example the neck of a bot-t]e.
Housed between the inner and outer bags there is insulation material in the Eorm of pellets 4. The pellets 4 are ~ ~ ~z~ 3~:
preferably of random diameter within a predetermined range and are made of foamed polystyrene. The pellets may however be formed of other materials such as crumbed or granulated foam plastics material having the qualities of foamed polystyrene pellets as are hereinafter set out. The number of pellets 4 should be such that there is a least sufficient to provide a single skin of pellets about substantially all of the exterior of the inner bag when an object is housed in the carry bag. In Fig.3 it will be seen that there will be a natural tendancy for the pellets to migrate to the bottom section of the carry bag when unoccupied. Fig.4 indicates how a pellet redistribution will take place when an object is positioned in the carry bag. The redistribution can be likened to a fluid flow of the pellets which will migrate from a zone where pressure is exerted to a zone of lesser prssure.
Fig.5 illustrates an alternate arrangement where there is an intermediate bag identified 7 with the opend ends of the bags l,2 and 7 fixed together to form the carry bag mouth 3.
The bag 7 has several uses. For example, it can be used to separate two zones occupied by pellets 4 thereby providing additional insulation for the carry bag whilst controlling the locatlon o~ the pellets in two "skins" around the object within the carry bag. The bag 7 need not be made of any particular material, Eor example it need not be waterproof.
-` ~2~ 3;~:
It can be in the form of a net which is strong and have openings small enough to prevent pellets migrating from one skin to the other. The bag 7 may be made oE inextensible strong material or net and provide the strength of the carry bag and relieve the inner and outer bags of the stretching forces that will occur if a heavy object is transported in the carry bag and it is supported by the draw string 6.
With such an arrangement the inner and outer bags could be relatively thin and decorative light weight material could be used for the outer bag and waterproof light weight material could be used for the inner bag.
In an alternate arrangement the inner and/or outer bags may have reinforcement strips affixed thereto to provide load support for objects carried in the carry bag thereby substantially elimlnating tension loads on the inner and/or outer bags. The intermediate bag 7 may also be in the form of a large mesh or grid which will allow free migration of the pellets between the inner and ou-ter bags.
Preferably the material Erom which the inner and outer bags is made is such as to have an electostatic affinity with the pellets ~, as may be promoted simply by frictional contact between polystyrene pellets and -the inner and outer bags.
The electrostatic attraction between the pellets and the material from which the inner and outer bags is made ` :~L29Z~3~
promotes the formation of a layer of pellets on the outer surface of the inner bag.
As will be understood the form of the carry bag substantially eliminates unoccupied air space within the carry bag and so there is little heat exchange between an object in the carry bag and the atmosphere within the carry bag. This is promoted by the support oE the carry bag and contents by the draw string 6. The result is improved temperature retention for the object in the carry bag.
Where an object or a number of objects are inserted into the carry bag assembly, e.g. a bottle of wine, or several cans of beer, or an irregular object such as a box or packet is and the closed bag assembly is left lying on a surface the natural tendancy is for the bag assembly to slump, due to the flexible nature of the bag materials. This also substantially eliminates empty space from within the bag assembly with resultant efficient temperature retention by the object(s) within the carry bag.
With irregular or regular shaped objects the placement of the object within the bag assembly will cause the flow of pellets between the bags. For example, if a bag assembly is lying on a table a majority of the pellets surplus to those electrostatically adhering to the inner bag will probably be Z~32 in the lowermost portion of the bag assembly. By placing a bottle in the bag assembly the weight of the bottle and the natural shuffling of the pellets as the bottle in posi-tioned within the carry bag will result in a generally uniform distribution of the pellets around the bottle as the pellets flow freely between the bags. The distribution of the pellets into a moulded consolidated sleeve around the bottle is further promoted by the application of tightening pressuré to the drawstring provided as part of the carry bag, In another example, if an object was thrust into a bag assembly sitting on its closed end, with the majority of the pellets not electrostatically adhering to the inner bag gathered at the closed end, the action of thrusting the object into the bag and the gravitational effect on the object will cause the pellets to flow upwardly over each other to form a skin several pellets thick around the object. The capacity of the pellets to flow between the bags and so allow the bag to adapt to accomodate objects oE
differing shapes and sizes provides an advantage over known containers for the defined purpose.
The foregoing example can be varied as shown in Fig.6 to have a different shape to that of the example illustrated in Figs.l to 5 whilst having the same physical characteristics.
Claims (4)
1. An insulated carry bag with substantially no resistance to manual reformation from a substantially cylindrical shape which is the normal expanded configuration of the carry bag to a shape corresponding to that of an article or an aggregation of articles housed in the carry bag, said carry bag comprising an outer bag part made of flexible sheet material and of generally cylindrical shape when expanded and which is closed at one end and open at the other end, an inner bag part of generally cylindrical shape when expanded and which is closed at one end and open at the other end, the inner bag part being smaller in diameter and shorter in length than the outer bag part and the perimeters of the open ends of the inner and outer bag parts being joined to form a mouth for the carry bag and this join providing the only connection between the outer and inner bag parts, drawstring closure means for the mouth of the carry bag, thermal insulating material in particulate form being provided in the hollow region defined by the outer bag part and inner bag part, the quantity of said particulate being at least sufficient to form a layer of insulation over the exterior surface of the inner bag part when it is expanded to cylindrical shape but less than the difference in volume of the region between the expanded form of the inner and outer bag parts.
2. A carry bag as claimed in claim 1 wherein the insulating material and at least the material from which the inner bag part is made are capable of maintaining a static electric surface charge sufficient to cause the insulating material to adhere to the inner bag part.
3. A carry bag as claimed in claim 1 wherein the insulating material is comprised of random sized spherical beads of foamed polystyrene.
4. A carry bag as claimed in claim 1 including an intermediate liner between the inner and outer bag parts, said liner having a shape similar to the inner and outer bag parts and being larger than the inner bag part and smaller than the outer bag part and having an open end secured to the open ends of the inner and outer bag parts;
said insulation material being disposed between the inner and intermediate bag parts and between the intermediate and outer bag parts.
said insulation material being disposed between the inner and intermediate bag parts and between the intermediate and outer bag parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000541701A CA1292432C (en) | 1987-07-09 | 1987-07-09 | Insulated carry bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000541701A CA1292432C (en) | 1987-07-09 | 1987-07-09 | Insulated carry bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1292432C true CA1292432C (en) | 1991-11-26 |
Family
ID=4136058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000541701A Expired - Lifetime CA1292432C (en) | 1987-07-09 | 1987-07-09 | Insulated carry bag |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1292432C (en) |
-
1987
- 1987-07-09 CA CA000541701A patent/CA1292432C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |