CA2057713A1 - High barrier plastic container - Google Patents
High barrier plastic containerInfo
- Publication number
- CA2057713A1 CA2057713A1 CA002057713A CA2057713A CA2057713A1 CA 2057713 A1 CA2057713 A1 CA 2057713A1 CA 002057713 A CA002057713 A CA 002057713A CA 2057713 A CA2057713 A CA 2057713A CA 2057713 A1 CA2057713 A1 CA 2057713A1
- Authority
- CA
- Canada
- Prior art keywords
- barrier layer
- closure member
- open end
- container body
- container
- 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
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
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
- B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
-
- 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
- B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
- B65D2517/0001—Details
- B65D2517/0058—Other details of container end panel
- B65D2517/008—Materials of container end panel
- B65D2517/0085—Foil-like, e.g. paper or cardboard
- B65D2517/0088—Foil-like, e.g. paper or cardboard with plastic overmoulded onto foil
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
- Closures For Containers (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A barrier container includes a gas imperme-able container body, a closure member and a gas impermeable barrier layer bonded to the closure member.
The closure member is spin welded to the open end of the container body and the barrier layer of the closure member defines a radially outer portion the is disposed across the side wall at the open end of the container body. This radially outer portion of the barrier layer is positioned to avoid any substantial contact with the outer surface of the side wall. The barrier layer includes a non-metallic high barrier layer and a pair of non-metallic flanking layers, each on a respective side of the non-metallic high barrier layer.
wp\WAW-22B\3011-9.PAT\ak
A barrier container includes a gas imperme-able container body, a closure member and a gas impermeable barrier layer bonded to the closure member.
The closure member is spin welded to the open end of the container body and the barrier layer of the closure member defines a radially outer portion the is disposed across the side wall at the open end of the container body. This radially outer portion of the barrier layer is positioned to avoid any substantial contact with the outer surface of the side wall. The barrier layer includes a non-metallic high barrier layer and a pair of non-metallic flanking layers, each on a respective side of the non-metallic high barrier layer.
wp\WAW-22B\3011-9.PAT\ak
Description
2 0 ~ 7 ~ ~ ~
HIGH BARRIER PLASTIC CONTAIN~R
BACKGROUND OF THE INVENTION
This invention relates to improvements in a barrier container of the type comprising a gas imperme-able container body having a side wall that defines an open end, a closure member, and a gas impermeable barrier layer bonded to the closure member, wherein the closure member defines a flange sized to receive the open end of the container, and wherein the closure member is spin welded to the open end of the container body with the open end of the container body received within the flange.
MacLaughlin U.S. Patent 4,892,227, assigned -~
to the assignee of the present invention, discloses a high barrier plastic container of the type described a~ove. In the disclosed container the barrier layer 28 of the closure member 24 is formed of a metal foil such as aluminum, and this barrier layer 28 includes a portion that extends in contact with the inner wall of the container 20. In so doing, the container of the MacLau~hlin patent differs from the prior art practice as shown for example in Del Bon U.S. Patent 4,333,585, Jeppsson U.S. Patent 4,212,409 and U.K. Patent Appli-cation GB 2120200. In all of these cases the ~arrier layer is shown as wrapping around the open end of the container ~ody, such that the barrier layer of the closure contacts ~oth the inner and outer side walls of 2 -- 2 03 7 ~
the container body. One advantage of this prior art approach is that it maximizes contact between the barrier layer of the closure and the barrier layer of the container body, and thereby promotes a high barrier closure.
However, the prior art approach demonstrated in the Del Bon, Jeppsson and British patent applica-tions are not believed to be optimally suited for a spin welded closure of the type described in the MacLaughlin patent. It is believed that an optimal spin weld bond is obtained by direct bonding between the container body and the closure. If the barrier layer were to intrude into the region of the bond between the closure and the container body, it is believed that such an intrusion would not enhance the quality or the integrity of the spin weld bond.
Thus, it is an object of this invention to provide a spin weld container of the type described above having improved barrier characteristics as compared with the container of the MacLaughlin patent, without degrading the spin weld bond between the closure and the container body.
As mentioned above, the MacLaughlin patent discloses the use of an aluminum foil 28 as a barrier layer on the closure. This approach can be used to form an effective closure and an effective barrier layer. However, an aluminum foil barrier layer is not without disadvantages in certain applications.
~ irst, since the aluminum foil disclosed in the MacLaughlin patent is bonded to the closure member the MacLaughlin patent does not disclose an all plastic container. The metal foil remaining in the portion of the closure spin that is welded to the container body can result in microwave problems when the opened con-tainer is heated in a microwave oven. Second, ~ecause 7 s~
the metal foil is bonded to the plastic of the closure, certain recycling disadvantages are inherent. Third, it has been discovered that in the event the dimensions of the closure and the container body are not con-trolled properly, a metallic barrier layer can result in metallic impurities being in~roduced into the contents of the container. For example, it is well known that plastic components change in dimension as they age. Such dimensional changes can result in a situation where the container body is smaller than intended and where the inside wall of the container body comes into high speed contact with the barrier layer of the closure during the spin welding process.
When this happens the barrier layer can be disrupted into a fine dust, which may find its way into food contained within the container. This result is of course unacceptable.
It is another object of this invention to provide an improved high barrier plastic container which aYoids the use of a metallic barrier layer in order to eliminate the above mentioned problems.
SUMMARY OF THE INVENTION
This invention relates to improvements to the barrier container described initially above having a gas impermeable container body and a closure member having a gas impermeable barrier layer bonded thereto, wherein the closure member is spin welded to the open end of the container body.
According to a first aspect of this in-vention, a radially outer portion of the barrier layer is disposed across the side wall at the open end of the container body. The side wall of the container body ~efines an outer surface adjacent the open end, and the barrier layer is positioned to avoid any substantial ~ ~ a 7 ~
contact with the outer surface, thereby enhancing direct spin welding bonding between the container body and the closure member, while simultaneously enhancing the barrier characteristics of the container.
According to a second aspect of this in-vention, a barrier container of the type described above includes a plurality of a co-extensive layers included in the barrier layer. This plurality of layers comprises at least one non-metallic high barrier layer and a pair of non-metallic flanking layers, each on a respective side of the non-metallic high barrier layer. The barrier layer, the container and the closure member are all devoid of any metallic layers.
In this way, the disadvantages described above related to metallic layers are all avoided.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a top view of a closure member of a container that incorporates a presently preferred embodiment of this invention.
Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
Figure 3 is an enlarged view of region 3 of Figure 2.
Figure 4 is an enlarged view of region 4 of Figure 3.
Figure 5 is an enlarged view of region 5 of Figure 3.
DETAILED DESCRIPTION OF THE
Turning now to the drawings, Figures 1 and 2 show general views ~f a container 10 which includes a container body 12 and closure member 20. Only the upper portion of the container body 12 is illustrated in Figure 2, but in general the container body 12 is barrel shaped and defines an open end 14 and a closed end (not shown). The open end 14 is defined by a side wall 16 having an outer surface 18. The outer surface is preferably circularly cylindrical in shape.
The closure member 20 defines a perimeter flange 22 that is integrally molded with a central panel 23. The flange 22 defines a circular groove 24 that terminates at a root 26.
The aspects of the container 10 described above are quite similar to those described in MacLaughlin ~.S. Patent 4,892,227, the disclosure of which is hereby incorporated by reference.
Figures 3, 4 and 5 are enlarged views that provide more detailed illustrations of selected aspects of the closure member 20. As best shown in Figure 3, the closure member 20 includes a barrier layer 3~
having a circular inner portion 32 which is integral with an intermediate annular portion 34. The annular portion 34 extends generally at right angles to the inner portion 32. The barrier layer 30 also includes a radially outer annular portion 36 which is generally disposed parallel to the inner portion 32.
As shown in Figure 3, the radially outer annular portion 36 extends across the root 26 of the groove 24, where it is disposed to come into contact with the open end 14 of the body 12. If desired, the radially outer annular portion 36 can be curved slightly to follow the shape of the root 26 of the groove 24. However, the radially outer annular portion 36 preferably does not come into any substantial contact with the outer surface 18 of the side wall 16 of the container body 12.
The illustrated geometry provides two important advantages. First, the radially outer h ~ ~ 7 ~
annular portion 36 crosses the root 26 of the groove 24 and thereby comes into contact with the open end 14.
This provides improved contact between the barrier layer 30 and the barrier layer 19 of the container body 12. Second, because the barrier layer 30 does not come into any substantial contact with the outer surface 18, the barrier layer 30 does not reduce the area of direct spin welding between the flange 22 and the container body 12. Thus, the high barrier characteristics of the container 10 are enhanced without detracting from the integrity of the spin weld bond 50.
Figure 4 shows an enlarged view of the barrier layer 30, and it can be seen that the barrier layer 30 is formed of five layers. The central layer is a high barrier layer 38 which is substantially gas impermeable. The high barrier layer 38 is covered on each side by a respective flanking layer 40, and the flanking layers 40 are secured in place adjacent the high barrier layer 38 by respective adhesive layers 42.
Preferably, the layers 38, 40, 42 are co-extruded as co-extensive layers in a sheet. This sheet is then thermally formed to the shape shown in Figure 3 and trimmed to size. Then the preshaped barrier layer is placed within a injection molding machine, and the resin material used to form the closure member 20 including the flange 22 is shot into the injection molding machine from the top surface only. The heat of the injection melt fuses the melt to the barrier layer 30.
Figure 5 shows an enlarged view of a weakened line 44 which is provided to allow easy opening of the closure member 20.
The barrier layer 30 completely eliminates any metallic layer in the barrier layer 30. As illustrated, neither the container body 12 nor the h closure member 20 includes any metallic layer. In this way, all metallic layers are avoided, and the advant-ages discussed above are obtained.
In particular, in the event the container 10 is smaller than desired and the container 10 comes into high speed contact with the barrier layer 30 during the spin weld process, no metallic elements will be deposited on the contents of the container 10.
The following details of construction are provided in order better to define the presently preferred embodiments.
A wide variety of resins can be used to form the container 10 and the closure member 20. However, the following resin blend is presently preferred for the closure member 20:
a) Polypropylene (Rexene PP57S20V) - 94%
b) Linear low density polyethylene (Novacore GI-5026A) - 2%
c) Color - Ferro CH31029 - 4%
Similarly, a variety of materials can be used for the barrier layer 30. The following materials are presently preferred:
a) Central high barrier layer 38 - Saran (Dow XU.31MA) b) Flanking layer 40 - Polypropylene (Himont 6331) c) Adhesi~e layer 42 - Exxon Esorene 5610 The presently preferred thickness of the layers 38~ 40, 42 are 0.003, 0.002, and 0.0015 inches, respectively.
~he presently preferred width and thickness of the reduced thickness line 44 are 0.005 and 0.003 inches, respectively.
~s~ ?
Other materials can be substituted. For example, the adhesive identified as Admer QF551 has also been found suitable for the adhesive layer 42 and EVOH (Evalca LCL lOlA) has been found suitable for the central high barrier layer 38.
of course, it should be understood that a wide range of changes and modifications can be made to the preferred embodiments described above. It is therefore intended that the foregoing detailed descrip-tion be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, which are intended to define the scope of this invention.
HIGH BARRIER PLASTIC CONTAIN~R
BACKGROUND OF THE INVENTION
This invention relates to improvements in a barrier container of the type comprising a gas imperme-able container body having a side wall that defines an open end, a closure member, and a gas impermeable barrier layer bonded to the closure member, wherein the closure member defines a flange sized to receive the open end of the container, and wherein the closure member is spin welded to the open end of the container body with the open end of the container body received within the flange.
MacLaughlin U.S. Patent 4,892,227, assigned -~
to the assignee of the present invention, discloses a high barrier plastic container of the type described a~ove. In the disclosed container the barrier layer 28 of the closure member 24 is formed of a metal foil such as aluminum, and this barrier layer 28 includes a portion that extends in contact with the inner wall of the container 20. In so doing, the container of the MacLau~hlin patent differs from the prior art practice as shown for example in Del Bon U.S. Patent 4,333,585, Jeppsson U.S. Patent 4,212,409 and U.K. Patent Appli-cation GB 2120200. In all of these cases the ~arrier layer is shown as wrapping around the open end of the container ~ody, such that the barrier layer of the closure contacts ~oth the inner and outer side walls of 2 -- 2 03 7 ~
the container body. One advantage of this prior art approach is that it maximizes contact between the barrier layer of the closure and the barrier layer of the container body, and thereby promotes a high barrier closure.
However, the prior art approach demonstrated in the Del Bon, Jeppsson and British patent applica-tions are not believed to be optimally suited for a spin welded closure of the type described in the MacLaughlin patent. It is believed that an optimal spin weld bond is obtained by direct bonding between the container body and the closure. If the barrier layer were to intrude into the region of the bond between the closure and the container body, it is believed that such an intrusion would not enhance the quality or the integrity of the spin weld bond.
Thus, it is an object of this invention to provide a spin weld container of the type described above having improved barrier characteristics as compared with the container of the MacLaughlin patent, without degrading the spin weld bond between the closure and the container body.
As mentioned above, the MacLaughlin patent discloses the use of an aluminum foil 28 as a barrier layer on the closure. This approach can be used to form an effective closure and an effective barrier layer. However, an aluminum foil barrier layer is not without disadvantages in certain applications.
~ irst, since the aluminum foil disclosed in the MacLaughlin patent is bonded to the closure member the MacLaughlin patent does not disclose an all plastic container. The metal foil remaining in the portion of the closure spin that is welded to the container body can result in microwave problems when the opened con-tainer is heated in a microwave oven. Second, ~ecause 7 s~
the metal foil is bonded to the plastic of the closure, certain recycling disadvantages are inherent. Third, it has been discovered that in the event the dimensions of the closure and the container body are not con-trolled properly, a metallic barrier layer can result in metallic impurities being in~roduced into the contents of the container. For example, it is well known that plastic components change in dimension as they age. Such dimensional changes can result in a situation where the container body is smaller than intended and where the inside wall of the container body comes into high speed contact with the barrier layer of the closure during the spin welding process.
When this happens the barrier layer can be disrupted into a fine dust, which may find its way into food contained within the container. This result is of course unacceptable.
It is another object of this invention to provide an improved high barrier plastic container which aYoids the use of a metallic barrier layer in order to eliminate the above mentioned problems.
SUMMARY OF THE INVENTION
This invention relates to improvements to the barrier container described initially above having a gas impermeable container body and a closure member having a gas impermeable barrier layer bonded thereto, wherein the closure member is spin welded to the open end of the container body.
According to a first aspect of this in-vention, a radially outer portion of the barrier layer is disposed across the side wall at the open end of the container body. The side wall of the container body ~efines an outer surface adjacent the open end, and the barrier layer is positioned to avoid any substantial ~ ~ a 7 ~
contact with the outer surface, thereby enhancing direct spin welding bonding between the container body and the closure member, while simultaneously enhancing the barrier characteristics of the container.
According to a second aspect of this in-vention, a barrier container of the type described above includes a plurality of a co-extensive layers included in the barrier layer. This plurality of layers comprises at least one non-metallic high barrier layer and a pair of non-metallic flanking layers, each on a respective side of the non-metallic high barrier layer. The barrier layer, the container and the closure member are all devoid of any metallic layers.
In this way, the disadvantages described above related to metallic layers are all avoided.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a top view of a closure member of a container that incorporates a presently preferred embodiment of this invention.
Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.
Figure 3 is an enlarged view of region 3 of Figure 2.
Figure 4 is an enlarged view of region 4 of Figure 3.
Figure 5 is an enlarged view of region 5 of Figure 3.
DETAILED DESCRIPTION OF THE
Turning now to the drawings, Figures 1 and 2 show general views ~f a container 10 which includes a container body 12 and closure member 20. Only the upper portion of the container body 12 is illustrated in Figure 2, but in general the container body 12 is barrel shaped and defines an open end 14 and a closed end (not shown). The open end 14 is defined by a side wall 16 having an outer surface 18. The outer surface is preferably circularly cylindrical in shape.
The closure member 20 defines a perimeter flange 22 that is integrally molded with a central panel 23. The flange 22 defines a circular groove 24 that terminates at a root 26.
The aspects of the container 10 described above are quite similar to those described in MacLaughlin ~.S. Patent 4,892,227, the disclosure of which is hereby incorporated by reference.
Figures 3, 4 and 5 are enlarged views that provide more detailed illustrations of selected aspects of the closure member 20. As best shown in Figure 3, the closure member 20 includes a barrier layer 3~
having a circular inner portion 32 which is integral with an intermediate annular portion 34. The annular portion 34 extends generally at right angles to the inner portion 32. The barrier layer 30 also includes a radially outer annular portion 36 which is generally disposed parallel to the inner portion 32.
As shown in Figure 3, the radially outer annular portion 36 extends across the root 26 of the groove 24, where it is disposed to come into contact with the open end 14 of the body 12. If desired, the radially outer annular portion 36 can be curved slightly to follow the shape of the root 26 of the groove 24. However, the radially outer annular portion 36 preferably does not come into any substantial contact with the outer surface 18 of the side wall 16 of the container body 12.
The illustrated geometry provides two important advantages. First, the radially outer h ~ ~ 7 ~
annular portion 36 crosses the root 26 of the groove 24 and thereby comes into contact with the open end 14.
This provides improved contact between the barrier layer 30 and the barrier layer 19 of the container body 12. Second, because the barrier layer 30 does not come into any substantial contact with the outer surface 18, the barrier layer 30 does not reduce the area of direct spin welding between the flange 22 and the container body 12. Thus, the high barrier characteristics of the container 10 are enhanced without detracting from the integrity of the spin weld bond 50.
Figure 4 shows an enlarged view of the barrier layer 30, and it can be seen that the barrier layer 30 is formed of five layers. The central layer is a high barrier layer 38 which is substantially gas impermeable. The high barrier layer 38 is covered on each side by a respective flanking layer 40, and the flanking layers 40 are secured in place adjacent the high barrier layer 38 by respective adhesive layers 42.
Preferably, the layers 38, 40, 42 are co-extruded as co-extensive layers in a sheet. This sheet is then thermally formed to the shape shown in Figure 3 and trimmed to size. Then the preshaped barrier layer is placed within a injection molding machine, and the resin material used to form the closure member 20 including the flange 22 is shot into the injection molding machine from the top surface only. The heat of the injection melt fuses the melt to the barrier layer 30.
Figure 5 shows an enlarged view of a weakened line 44 which is provided to allow easy opening of the closure member 20.
The barrier layer 30 completely eliminates any metallic layer in the barrier layer 30. As illustrated, neither the container body 12 nor the h closure member 20 includes any metallic layer. In this way, all metallic layers are avoided, and the advant-ages discussed above are obtained.
In particular, in the event the container 10 is smaller than desired and the container 10 comes into high speed contact with the barrier layer 30 during the spin weld process, no metallic elements will be deposited on the contents of the container 10.
The following details of construction are provided in order better to define the presently preferred embodiments.
A wide variety of resins can be used to form the container 10 and the closure member 20. However, the following resin blend is presently preferred for the closure member 20:
a) Polypropylene (Rexene PP57S20V) - 94%
b) Linear low density polyethylene (Novacore GI-5026A) - 2%
c) Color - Ferro CH31029 - 4%
Similarly, a variety of materials can be used for the barrier layer 30. The following materials are presently preferred:
a) Central high barrier layer 38 - Saran (Dow XU.31MA) b) Flanking layer 40 - Polypropylene (Himont 6331) c) Adhesi~e layer 42 - Exxon Esorene 5610 The presently preferred thickness of the layers 38~ 40, 42 are 0.003, 0.002, and 0.0015 inches, respectively.
~he presently preferred width and thickness of the reduced thickness line 44 are 0.005 and 0.003 inches, respectively.
~s~ ?
Other materials can be substituted. For example, the adhesive identified as Admer QF551 has also been found suitable for the adhesive layer 42 and EVOH (Evalca LCL lOlA) has been found suitable for the central high barrier layer 38.
of course, it should be understood that a wide range of changes and modifications can be made to the preferred embodiments described above. It is therefore intended that the foregoing detailed descrip-tion be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, which are intended to define the scope of this invention.
Claims (7)
1. In a barrier container of the type comprising a gas impermeable container body having a side wall that defines an open end, a closure member, and a gas impermeable barrier layer bonded to the closure member, wherein the closure member defines a flange sized to receive the open end of the container, and wherein the closure member is spin welded to the open end of the container body with the open end of the container body received within the flange, the improvement comprising:
a radially outer portion of the barrier layer disposed across the side wall at the open end of the container body;
said side wall defining an outer surface adjacent the open end, and said barrier layer positioned to avoid any substantial contact with the outer surface, thereby enhancing direct spin weld bonding between the container body and the closure member.
a radially outer portion of the barrier layer disposed across the side wall at the open end of the container body;
said side wall defining an outer surface adjacent the open end, and said barrier layer positioned to avoid any substantial contact with the outer surface, thereby enhancing direct spin weld bonding between the container body and the closure member.
2. The invention of Claim 1 wherein the barrier layer comprises a plurality of non-metallic layers comprising at least one high barrier non-metallic layer.
3. The invention of Claim 2 wherein the barrier layer comprises a circular inner portion, an annular inter-mediate portion extending around the inner portion substantially at right angles thereto, and an annular outer portion extending radially outwardly from the intermediate portion, generally parallel to the inner portion.
4. The invention of Claim 2 wherein the plurality of non-metallic layers comprises a pair of flanking layers, and wherein the high barrier non-metallic layer is interposed between the flanking layers.
5. In a barrier container of the type comprising a gas impermeable container body having a side wall that defines an open end, a closure member, and a gas impermeable barrier layer bonded to the closure member, wherein the closure member defines a flange sized to receive the open end of the container, and wherein the closure member is spin welded to the open end of the container body with the open end of the container body received within the flange, the improvement comprising:
a plurality of co-extensive layers included in the barrier layer, said plurality of layers comprising at least one non-metallic high barrier layer and a pair of non-metallic flanking layers, each on a respective side of the non-metallic high barrier layer;
said barrier layer, said container and said closure member all being devoid of any metallic layers.
a plurality of co-extensive layers included in the barrier layer, said plurality of layers comprising at least one non-metallic high barrier layer and a pair of non-metallic flanking layers, each on a respective side of the non-metallic high barrier layer;
said barrier layer, said container and said closure member all being devoid of any metallic layers.
6. The invention of Claim 5 wherein the barrier layer comprises a circular inner portion, an annular intermediate portion extending around the inner portion substantially at right angles thereto, and an annular outer portion extending radially outwardly from the intermediate portion, generally parallel to the inner portion.
7. The invention of Claim 5 wherein the barrier layer comprises a radially outer portion of the barrier layer disposed across the side wall at the open end of the container body;
wherein said side wall defines an outer surface adjacent the open end; and wherein said barrier layer is positioned to avoid any substantial contact with the outer surface, thereby enhancing direct spin weld bonding between the container body and the closure member.
wherein said side wall defines an outer surface adjacent the open end; and wherein said barrier layer is positioned to avoid any substantial contact with the outer surface, thereby enhancing direct spin weld bonding between the container body and the closure member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64488291A | 1991-01-23 | 1991-01-23 | |
| US07/644,882 | 1991-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2057713A1 true CA2057713A1 (en) | 1992-07-24 |
Family
ID=24586721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002057713A Abandoned CA2057713A1 (en) | 1991-01-23 | 1991-12-18 | High barrier plastic container |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH05132062A (en) |
| CA (1) | CA2057713A1 (en) |
| GB (1) | GB2252093B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2170590C (en) * | 1993-09-03 | 1999-03-16 | Daniel James Kinne | Improved tear-away canister lid |
| US6325213B1 (en) | 1997-11-20 | 2001-12-04 | General Mills, Inc. | Plastic container for food products |
| US6213301B1 (en) | 1997-11-20 | 2001-04-10 | General Mills, Inc. | Plastic container for food products |
| JP2000326968A (en) * | 1999-05-18 | 2000-11-28 | Ishida Co Ltd | Container lid |
| US6547093B1 (en) | 2000-02-28 | 2003-04-15 | General Mills, Inc. | Plastic container for food products |
| US8714402B2 (en) | 2010-01-21 | 2014-05-06 | General Mills, Inc. | Thermoformed container assembly for food products |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IN149917B (en) * | 1978-04-10 | 1982-05-29 | Akerlund & Rausing Ab | |
| US4389266A (en) * | 1981-02-10 | 1983-06-21 | Brockway Glass Co., Inc. | Preparation of glass container for thermoplastic closure |
| US4359169A (en) * | 1981-08-28 | 1982-11-16 | Container Corporation Of America | Container end closure arrangement |
| US4892227A (en) * | 1988-04-21 | 1990-01-09 | Packaging Resources Incorporated | High barrier plastic container and method of making same |
-
1991
- 1991-07-30 GB GB9116388A patent/GB2252093B/en not_active Expired - Fee Related
- 1991-08-12 JP JP3201767A patent/JPH05132062A/en active Pending
- 1991-12-18 CA CA002057713A patent/CA2057713A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05132062A (en) | 1993-05-28 |
| GB9116388D0 (en) | 1991-09-11 |
| GB2252093A (en) | 1992-07-29 |
| GB2252093B (en) | 1994-12-07 |
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