CA2156796A1 - Impervious bag or tube - Google Patents
Impervious bag or tubeInfo
- Publication number
- CA2156796A1 CA2156796A1 CA002156796A CA2156796A CA2156796A1 CA 2156796 A1 CA2156796 A1 CA 2156796A1 CA 002156796 A CA002156796 A CA 002156796A CA 2156796 A CA2156796 A CA 2156796A CA 2156796 A1 CA2156796 A1 CA 2156796A1
- Authority
- CA
- Canada
- Prior art keywords
- sheath
- tubular
- fabric
- tubular member
- fabric sheet
- 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
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/003—Flexible containers made from webs starting from tubular webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Abstract
A tubular member comprises an inner tubular fabric sheath of selected length and selected circumference. A first fabric sheet is laminated to one side of the tubular fabric sheath which has a width which is greater than half the circumference of the tubular sheath so that opposite longitudinal side edges which run generally parallel to the length of the tubular sheath extend beyond opposite side edges of the sheath. A second fabric sheet is laminated to the opposite side of the tubular fabric sheath which also has a width which is greater than half the circumference of the tubular sheath, so that opposite longitudinal side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges of the sheath.
The respective opposite side edges of the first and second sheets are laminated together so as to encapsulate the tubular sheath between the first and second sheets. Preferably the tubular fabric sheath is seamless along its length. The fabric from which the sheath and the first and second fabric sheets are made may comprise a woven polypropylene cloth. The material used for lamination may comprise polyethylene, polypropylene or the like.
Alternatively polyethylene cloth may be used with a polyethylene laminating material.
The respective opposite side edges of the first and second sheets are laminated together so as to encapsulate the tubular sheath between the first and second sheets. Preferably the tubular fabric sheath is seamless along its length. The fabric from which the sheath and the first and second fabric sheets are made may comprise a woven polypropylene cloth. The material used for lamination may comprise polyethylene, polypropylene or the like.
Alternatively polyethylene cloth may be used with a polyethylene laminating material.
Description
~ 2156796 BACKGROUND TO lllE INVENTION
This invention relates to high strength bags or tubes of the type which may be used, for example, to store m~teri~ or chemicals for transportation which is of high strength but is liquid impervious. The invention can also be ext~n~led to tubular applications such as venfflation ducts, ple~urG hoses and the like.
The aforementioned type of products have in the past been made from a fabric or fabric-like m~t~ri~l which provides flexibility for the product but which gives the product strength and durability. However, prior art products of this type have generally compri~e~l an outer liquid pervious tubular member and an inner liquid h,ll,cl~ious tubular sheath which is sep~dle from the outer member, or a tubular member which is made up of a series of dirr~le~l layers which are woven or wound in situ. These constructions tend to be either unacceptably G~Gnsi~G for the purpose int~n-le~l or are difficult and costly to produce. Other bags have been made with sewn seams but this method of construction is often unacceptable because the needle punctures tend to weaken the fabric and also provide leakage holes for liquids contained in the bag.
SUMMARY OF THE INVENTION
According to the invention there is provided a tubular member comprising, an inner tubular fabric sheath of selected length and selected circumference, a first fabric sheet l~.,.it~ çd to one side of the tubular fabric sheath and having a width which is greater than half the circumference of the tubular sheath, the first fabric sheet having opposite longitudinal side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges thereof, a second fabric sheet l~min~tçd to the opposite side of the tubular fabric sheath and having a width which is greater than half the cir~ lfelence of the tubular sheath, the second fabric sheet having opposite longitu-lin~l side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges thereof, the respective opposite side edges of the first and second sheets being l~min~tçd together so as to encapsulate the tubular sheath between the first and second sheets.
Preferably the tubular fabric sheath is seamless along its length. The fabric from which the sheath and the first and second fabric sheets are made may comprise a woven poly~io~ylene cloth. The m~tt~ri~l used for l~min~ttion may comprise polyethylene, polyl.l~ylene or the like. ~lt~rn~tively polyethylene cloth may be used with a polyethylene l~ g m~t~ri~l One or both ends of the tubular member may be sealed to form a sealed bag.
The sealed bag may have a valve fitted thereto for introducing material into the interior of the bag. The ends of the tubular member may be folded over one or more times with the fold line running generally perpendicular to the length of the tubular member to form said sealed ends. The m~teri~l between each fold is preferably adhesively bonded to enhance the seal.
An embodiment of the invention is described in detail in the following passages of the specification which refer to the accolllpal-yhlg drawings.
The drawings are, however, merely illustrative of how the invention might be put into effect so that the specific fealules shown are not to be construed as limiting on the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a p~.~e~ilive view of a tubular member according to the invention exploded into its component parts;
Figure 2 shows a similar view to that of Figure 1 with the tubular member bonded together;
Figure 3 shows a cross-sectional view along lines II-II depicted in Figure 2;
Figure 4 shows a pc.~e-;live view of an end of a tubular member sealed in a typical manner, and Figure 5 shows a diagrammatic side view of an app~dlus for forming a tubular member according to the invention.
DETAILED DESCRIPTION
Referring initially to Figures 1 and 3 of the drawings, a tubular member 10 according to the invention is compri~e(l of an inner tubular sheath 12 which is shown in generally flat configuration but which will expand out to circular form when int~rn~lly filled or ~ s~ e~l A tubular sheath 12 is formed of a fabric material such as woven polyl,io~ylene cloth and will generally be m~mlf~lred in a continuous process in lengths of 500m to 1500m or more.
A first fabric sheet 14 is l~min~tç~l to one side 16 of the tubular sheath 12 and a second fabric sheet 18 is l~min~tecl to the opposite side 20 of the tubular sheath 12. T ~min~tion will preferably be done by applying a suitable l~min~tinp m~t~ri~l, such as polyethylene, to first the one side and then the opposite side of the sheath 12 as will be described in more detail herebelow.
The width of the tubular sheath when lying flat is indicated in Figure l as being "wi". "Wi" is thus basically equivalent to half the ci~ ferellce of the tubular sheath. The width of the first and second sheets 14 and 18 is indicated in Figure 1 as being "wo". "Wo" is wider than "wi" so that longitll-lin~l side edges indicated at numeral 22 project beyond the opposite edges of the tubular sheath 12 when in the assembled condition as shown in Figure 2 of the drawings. Thus, when the first and second sheets 14 and 18 are bonded to opposite sides of the sheath 12, the longit~l~lin~l side edges 22 of the two sheets 14 and 18 extend beyond the opposite side edges of the sheath to form overlapping edge strips 24 which run along each side of the sheath 12. The edges 22 are thus in face to face contact with each other and are l~ çcl together with the effect that the entire circumference of the sheath 12 is effectively sealed along the full length of the sheath 12. The cross-sectional form of the composite sheath is shown in Figure 3 with the l~."in~ g m~tt~ri~l indicated at numeral 19. The l~n in~tin~ material is depicted as being relatively thick but, in practice, the thickness of the l~min~tçcl m~t.ori~l will in most circllm~t~nces be less than lmm.
If so required, the ends 26 of the tubular member 10 may be sealed so as to form a sealed bag. Referring to Figure 2, access to the interior 28 of the 21~6796 tubular member 10 is provided through a valve 30 which may be adapted to permit the introduction of a fluid into, or the release of a fluid from, the interior 28 of the tubular member 10. ~lt~rn~tively, the valve 30 may comprise a suitable one-way valve adapted to permit the introduction of a fluid under plc;,~we into the interior 28 of the tubular member 10 such that the pl`e3~ will be m~int~ined within the tubular member 10 after the nozzle used for introducing the fluid has been removed from the valve 30.
Since providing the valve 30 in the tubular member 10 will provide a weak point for the tubular member it is preferred that a reinforcing band or strap 32 is fitted around the cil~;wl~lence of the tubular member 10 in the region of the valve 30.
Turning now to Figure 4 of the drawings, the sealing of an end 26 of a tubular member in a typical manner is depicted. The end 26 is preferably folded over one or more times along fold lines running generally perpendicular to the length of the tubular member 10 to form the sealed end.
After each fold is made an adhesive will be applied to the region where the next fold will take place so that each face of the fold is adhered to another.
Theledrl~ reillfolcillg straps or bands 40 may be adhered around the entire folded end to complete the sealing of the end of the tubular member 10.
The straps 40 will serve to resist the tendency of the ends to unfold as the iW`e within the tubular member 10 increases. Tests have shown that this type of sealing of the end of the tubular member is particularly effective.
It is pl~r~l~d that a continuous process is used to form the tubular member 10 depicted in Figures 1, 2 and 3 of the drawings. A typical process is described with ler~ence to Figure S of the drawings. It is envisaged that the inner tubular sheath 12 will be provided in a roll indicated at numeral 34, the first sheet m~t~ri~l 14 will be provided in a roll indicated at numeral 36 and a second sheet m~tP.ri~l 18 will be provided in a roll indicated at numeral 38. The first sheet m~t~ri~l 14 will run in the direction of the arrow SO past rollers 42 to a l~min~tion station 44 where the underside of the inner tubular sheath 12 and the edges 22 of the first sheet 14 will be coated with l~min~te T.~min~tion rollers 43 will press the sheath 12 and sheet 14 together at this l~min~tion station 44. From there the composite sheet w~ill pass to a second l~min~tion station 46 which will apply l~
to the upper side of the sheath 12 and will also serve to l~",i~ 1e the edges 22 of the sheets 14 and 18 together. T.~min~tion rollers 45 will press the composite sheet together at this l~min~tion station 46. The composite m~teri~l 10 will be rolled onto a roll 48.
Clearly, depending on the m~t~ri~l from which the sheets 14 and 18 and the sheaths 12 are formed, as well as the material used for the l~min~tion, the process may need to undergo additional steps such as heating for example.
It will, however, be appreciated that the process of forming the tubular member 10 depicted in Figures 1, 2 and 3 can be conducted as a continuous process. Thelear~l the tubular member may be cut to the desired lengths and, if so required, the ends 26 of the tubular member may be sealed so as to form a sealed bag.
Any suitable material may be used to form the tubular member shown in the drawings although it is prerelled that woven polyl,iopylene cloth is used.
A polyethylene material can be used for l~min~tion which will seal the fabric used as well as l~."i~ g the fabric sheets together.
It will be appreciated that if so required, the ends of the tubular member may be sealed to form a bag according to a number of dirr.,relll methods.
For example, it may be simpler to form a sealed end with a single fold rather than a number of folds provided that adhesive is applied to the interior of the tubular member adjacent to the ends of the member prior to the folding of such ends.
Clearly, this invention can be used in a number of applications not only for the m~mlf~ctllre of tubes and bags but also for the m~nllf~ctllre of ventilationducts, ple~ e hoses and the like.
This invention relates to high strength bags or tubes of the type which may be used, for example, to store m~teri~ or chemicals for transportation which is of high strength but is liquid impervious. The invention can also be ext~n~led to tubular applications such as venfflation ducts, ple~urG hoses and the like.
The aforementioned type of products have in the past been made from a fabric or fabric-like m~t~ri~l which provides flexibility for the product but which gives the product strength and durability. However, prior art products of this type have generally compri~e~l an outer liquid pervious tubular member and an inner liquid h,ll,cl~ious tubular sheath which is sep~dle from the outer member, or a tubular member which is made up of a series of dirr~le~l layers which are woven or wound in situ. These constructions tend to be either unacceptably G~Gnsi~G for the purpose int~n-le~l or are difficult and costly to produce. Other bags have been made with sewn seams but this method of construction is often unacceptable because the needle punctures tend to weaken the fabric and also provide leakage holes for liquids contained in the bag.
SUMMARY OF THE INVENTION
According to the invention there is provided a tubular member comprising, an inner tubular fabric sheath of selected length and selected circumference, a first fabric sheet l~.,.it~ çd to one side of the tubular fabric sheath and having a width which is greater than half the circumference of the tubular sheath, the first fabric sheet having opposite longitudinal side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges thereof, a second fabric sheet l~min~tçd to the opposite side of the tubular fabric sheath and having a width which is greater than half the cir~ lfelence of the tubular sheath, the second fabric sheet having opposite longitu-lin~l side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges thereof, the respective opposite side edges of the first and second sheets being l~min~tçd together so as to encapsulate the tubular sheath between the first and second sheets.
Preferably the tubular fabric sheath is seamless along its length. The fabric from which the sheath and the first and second fabric sheets are made may comprise a woven poly~io~ylene cloth. The m~tt~ri~l used for l~min~ttion may comprise polyethylene, polyl.l~ylene or the like. ~lt~rn~tively polyethylene cloth may be used with a polyethylene l~ g m~t~ri~l One or both ends of the tubular member may be sealed to form a sealed bag.
The sealed bag may have a valve fitted thereto for introducing material into the interior of the bag. The ends of the tubular member may be folded over one or more times with the fold line running generally perpendicular to the length of the tubular member to form said sealed ends. The m~teri~l between each fold is preferably adhesively bonded to enhance the seal.
An embodiment of the invention is described in detail in the following passages of the specification which refer to the accolllpal-yhlg drawings.
The drawings are, however, merely illustrative of how the invention might be put into effect so that the specific fealules shown are not to be construed as limiting on the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a p~.~e~ilive view of a tubular member according to the invention exploded into its component parts;
Figure 2 shows a similar view to that of Figure 1 with the tubular member bonded together;
Figure 3 shows a cross-sectional view along lines II-II depicted in Figure 2;
Figure 4 shows a pc.~e-;live view of an end of a tubular member sealed in a typical manner, and Figure 5 shows a diagrammatic side view of an app~dlus for forming a tubular member according to the invention.
DETAILED DESCRIPTION
Referring initially to Figures 1 and 3 of the drawings, a tubular member 10 according to the invention is compri~e(l of an inner tubular sheath 12 which is shown in generally flat configuration but which will expand out to circular form when int~rn~lly filled or ~ s~ e~l A tubular sheath 12 is formed of a fabric material such as woven polyl,io~ylene cloth and will generally be m~mlf~lred in a continuous process in lengths of 500m to 1500m or more.
A first fabric sheet 14 is l~min~tç~l to one side 16 of the tubular sheath 12 and a second fabric sheet 18 is l~min~tecl to the opposite side 20 of the tubular sheath 12. T ~min~tion will preferably be done by applying a suitable l~min~tinp m~t~ri~l, such as polyethylene, to first the one side and then the opposite side of the sheath 12 as will be described in more detail herebelow.
The width of the tubular sheath when lying flat is indicated in Figure l as being "wi". "Wi" is thus basically equivalent to half the ci~ ferellce of the tubular sheath. The width of the first and second sheets 14 and 18 is indicated in Figure 1 as being "wo". "Wo" is wider than "wi" so that longitll-lin~l side edges indicated at numeral 22 project beyond the opposite edges of the tubular sheath 12 when in the assembled condition as shown in Figure 2 of the drawings. Thus, when the first and second sheets 14 and 18 are bonded to opposite sides of the sheath 12, the longit~l~lin~l side edges 22 of the two sheets 14 and 18 extend beyond the opposite side edges of the sheath to form overlapping edge strips 24 which run along each side of the sheath 12. The edges 22 are thus in face to face contact with each other and are l~ çcl together with the effect that the entire circumference of the sheath 12 is effectively sealed along the full length of the sheath 12. The cross-sectional form of the composite sheath is shown in Figure 3 with the l~."in~ g m~tt~ri~l indicated at numeral 19. The l~n in~tin~ material is depicted as being relatively thick but, in practice, the thickness of the l~min~tçcl m~t.ori~l will in most circllm~t~nces be less than lmm.
If so required, the ends 26 of the tubular member 10 may be sealed so as to form a sealed bag. Referring to Figure 2, access to the interior 28 of the 21~6796 tubular member 10 is provided through a valve 30 which may be adapted to permit the introduction of a fluid into, or the release of a fluid from, the interior 28 of the tubular member 10. ~lt~rn~tively, the valve 30 may comprise a suitable one-way valve adapted to permit the introduction of a fluid under plc;,~we into the interior 28 of the tubular member 10 such that the pl`e3~ will be m~int~ined within the tubular member 10 after the nozzle used for introducing the fluid has been removed from the valve 30.
Since providing the valve 30 in the tubular member 10 will provide a weak point for the tubular member it is preferred that a reinforcing band or strap 32 is fitted around the cil~;wl~lence of the tubular member 10 in the region of the valve 30.
Turning now to Figure 4 of the drawings, the sealing of an end 26 of a tubular member in a typical manner is depicted. The end 26 is preferably folded over one or more times along fold lines running generally perpendicular to the length of the tubular member 10 to form the sealed end.
After each fold is made an adhesive will be applied to the region where the next fold will take place so that each face of the fold is adhered to another.
Theledrl~ reillfolcillg straps or bands 40 may be adhered around the entire folded end to complete the sealing of the end of the tubular member 10.
The straps 40 will serve to resist the tendency of the ends to unfold as the iW`e within the tubular member 10 increases. Tests have shown that this type of sealing of the end of the tubular member is particularly effective.
It is pl~r~l~d that a continuous process is used to form the tubular member 10 depicted in Figures 1, 2 and 3 of the drawings. A typical process is described with ler~ence to Figure S of the drawings. It is envisaged that the inner tubular sheath 12 will be provided in a roll indicated at numeral 34, the first sheet m~t~ri~l 14 will be provided in a roll indicated at numeral 36 and a second sheet m~tP.ri~l 18 will be provided in a roll indicated at numeral 38. The first sheet m~t~ri~l 14 will run in the direction of the arrow SO past rollers 42 to a l~min~tion station 44 where the underside of the inner tubular sheath 12 and the edges 22 of the first sheet 14 will be coated with l~min~te T.~min~tion rollers 43 will press the sheath 12 and sheet 14 together at this l~min~tion station 44. From there the composite sheet w~ill pass to a second l~min~tion station 46 which will apply l~
to the upper side of the sheath 12 and will also serve to l~",i~ 1e the edges 22 of the sheets 14 and 18 together. T.~min~tion rollers 45 will press the composite sheet together at this l~min~tion station 46. The composite m~teri~l 10 will be rolled onto a roll 48.
Clearly, depending on the m~t~ri~l from which the sheets 14 and 18 and the sheaths 12 are formed, as well as the material used for the l~min~tion, the process may need to undergo additional steps such as heating for example.
It will, however, be appreciated that the process of forming the tubular member 10 depicted in Figures 1, 2 and 3 can be conducted as a continuous process. Thelear~l the tubular member may be cut to the desired lengths and, if so required, the ends 26 of the tubular member may be sealed so as to form a sealed bag.
Any suitable material may be used to form the tubular member shown in the drawings although it is prerelled that woven polyl,iopylene cloth is used.
A polyethylene material can be used for l~min~tion which will seal the fabric used as well as l~."i~ g the fabric sheets together.
It will be appreciated that if so required, the ends of the tubular member may be sealed to form a bag according to a number of dirr.,relll methods.
For example, it may be simpler to form a sealed end with a single fold rather than a number of folds provided that adhesive is applied to the interior of the tubular member adjacent to the ends of the member prior to the folding of such ends.
Clearly, this invention can be used in a number of applications not only for the m~mlf~ctllre of tubes and bags but also for the m~nllf~ctllre of ventilationducts, ple~ e hoses and the like.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:-
1. A tubular member comprising an inner tubular fabric sheath of selected length and selected circumference, a first fabric sheet laminated to one side of the tubular fabric sheath and having a width which is greater than half the circumference of the tubular sheath, the first fabric sheet having opposite longitudinal side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges thereof, a second fabric sheet laminated to the opposite side of the tubular fabric sheath and having a width which is greater than half the circumference of the tubular sheath, the second fabric sheet having opposite longitudinal side edges which run generally parallel to the length of the tubular sheath and extend beyond opposite side edges thereof, the respective opposite side edges of the first and second sheets being laminated together so as to encapsulate the tubular sheath between the first and second sheets.
2. A tubular member according to claim 1 wherein the tubular fabric sheath is seamless along its length.
3. A tubular member according to claim 1 wherein the fabric from which the sheath and first and second sheets are made comprises woven polyethylene or polyprolpylene cloth.
4. A tubular member according to claim 3 wherein the sheath and sheets are laminated together with polyethylene or polypropylene laminate.
5. A tubular member according to claim 1 wherein one or both ends thereof are sealed.
6. A tubular member according to claim 5 wherein both ends are sealed to form a bag and the bag has a valve fitted thereto for introducing fluid material into the bag.
7. A tubular member according to claim 5 wherein the ends of the bag are folded over one or more times and fastened in their folded over configuration to form said sealed ends.
8. A tubular member according to claim 7 wherein the material between the or each fold is adhesively bonded to strengthen the sealed ends against rupture.
9. A method of forming a tubular member comprising the steps of:
providing a fabric tube of selected length and selected circumference having an inner surface and an outer surface;
laminating a first fabric sheet to the outer surface on one side of the tube, said first fabric sheet having a width which is wider than half of said circumference, said first fabric sheet having longitudinal edges which run generally parallel to the length of the tube and extend beyond opposite lateral edges of said tube; and laminating a second fabric sheet to the opposite side of said tube, said second fabric sheet having a width which is wider than half of said circumference, said second fabric sheet having longitudinal edges which run generally parallel to the length of the tube and extend beyond opposite lateral edges of said tube, said longitudinal edges of said second fabric sheet being simultaneously laminated to the longitudinal edges of the first fabric sheet.
providing a fabric tube of selected length and selected circumference having an inner surface and an outer surface;
laminating a first fabric sheet to the outer surface on one side of the tube, said first fabric sheet having a width which is wider than half of said circumference, said first fabric sheet having longitudinal edges which run generally parallel to the length of the tube and extend beyond opposite lateral edges of said tube; and laminating a second fabric sheet to the opposite side of said tube, said second fabric sheet having a width which is wider than half of said circumference, said second fabric sheet having longitudinal edges which run generally parallel to the length of the tube and extend beyond opposite lateral edges of said tube, said longitudinal edges of said second fabric sheet being simultaneously laminated to the longitudinal edges of the first fabric sheet.
10. A method according to claim 9 which includes the further step of sealing at least one end of said tube.
11. A method according to claim 10 wherein said end is sealed by folding the end of the tube over, at least once, and fastening the end in its folded over configuration.
12. A method according to claim 11 wherein the fastening is achieved by adhesively bonding the two facing sides of the fold together.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA956763A ZA956763B (en) | 1995-08-14 | 1995-08-14 | Impervious bag or tube |
| CA002156796A CA2156796A1 (en) | 1995-08-14 | 1995-08-23 | Impervious bag or tube |
| AU30295/95A AU3029595A (en) | 1995-08-14 | 1995-08-28 | Impervious bag or tube |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA956763A ZA956763B (en) | 1995-08-14 | 1995-08-14 | Impervious bag or tube |
| CA002156796A CA2156796A1 (en) | 1995-08-14 | 1995-08-23 | Impervious bag or tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2156796A1 true CA2156796A1 (en) | 1997-02-24 |
Family
ID=25678119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002156796A Abandoned CA2156796A1 (en) | 1995-08-14 | 1995-08-23 | Impervious bag or tube |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU3029595A (en) |
| CA (1) | CA2156796A1 (en) |
| ZA (1) | ZA956763B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007101061A1 (en) * | 2006-02-24 | 2007-09-07 | Cdf Corporation | Flexible liner for fibc or bag-in-box container systems with improved flex crack resistance |
| US8182152B2 (en) | 2006-03-28 | 2012-05-22 | Cdf Corporation | Flexible liner for FIBC or bag-in-box container systems with improved tensile strength |
| US8567660B2 (en) | 2009-11-17 | 2013-10-29 | Cdf Corporation | Sustainable packaging system for shipping liquid or viscous products |
| US9016555B2 (en) | 2007-04-03 | 2015-04-28 | Cdf Corporation | Flexible liner and bag-in-box container systems |
| US9120608B2 (en) | 2009-11-17 | 2015-09-01 | Cdf Corporation | Sustainable packaging system for shipping liquid or viscous products |
| US9346612B2 (en) | 2004-07-27 | 2016-05-24 | Cdf Corporation | Flexible liner for FIBC or bag-in-box container systems |
| US11180280B2 (en) | 2010-11-16 | 2021-11-23 | Cdf Corporation | Secondary packaging system for pre-packaged products |
-
1995
- 1995-08-14 ZA ZA956763A patent/ZA956763B/en unknown
- 1995-08-23 CA CA002156796A patent/CA2156796A1/en not_active Abandoned
- 1995-08-28 AU AU30295/95A patent/AU3029595A/en not_active Abandoned
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9346612B2 (en) | 2004-07-27 | 2016-05-24 | Cdf Corporation | Flexible liner for FIBC or bag-in-box container systems |
| WO2007101061A1 (en) * | 2006-02-24 | 2007-09-07 | Cdf Corporation | Flexible liner for fibc or bag-in-box container systems with improved flex crack resistance |
| US8075188B2 (en) | 2006-02-24 | 2011-12-13 | Cdf Corporation | Flexible liner for FIBC or bag-in-box container systems with improved flex crack resistance |
| US8182152B2 (en) | 2006-03-28 | 2012-05-22 | Cdf Corporation | Flexible liner for FIBC or bag-in-box container systems with improved tensile strength |
| US9016555B2 (en) | 2007-04-03 | 2015-04-28 | Cdf Corporation | Flexible liner and bag-in-box container systems |
| US8567660B2 (en) | 2009-11-17 | 2013-10-29 | Cdf Corporation | Sustainable packaging system for shipping liquid or viscous products |
| US9120608B2 (en) | 2009-11-17 | 2015-09-01 | Cdf Corporation | Sustainable packaging system for shipping liquid or viscous products |
| US11180280B2 (en) | 2010-11-16 | 2021-11-23 | Cdf Corporation | Secondary packaging system for pre-packaged products |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA956763B (en) | 1996-03-20 |
| AU3029595A (en) | 1997-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20010823 |