CA1308066C - Static controlled discharge spout - Google Patents
Static controlled discharge spoutInfo
- Publication number
- CA1308066C CA1308066C CA000556860A CA556860A CA1308066C CA 1308066 C CA1308066 C CA 1308066C CA 000556860 A CA000556860 A CA 000556860A CA 556860 A CA556860 A CA 556860A CA 1308066 C CA1308066 C CA 1308066C
- Authority
- CA
- Canada
- Prior art keywords
- discharge spout
- product
- receptacle
- fabric
- layer
- 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 - Fee Related
Links
Landscapes
- Bag Frames (AREA)
- Laminated Bodies (AREA)
Abstract
STATIC CONTROLLED DISCHARGE SPOUT
ABSTRACT
A discharge spout on the bottom wall of a collapsible receptacle has an exterior layer which is grounded during the flow of material through the discharge spout to prevent buildup of static electric charge therein. The discharge spout is made from a metalized fabric having a lower layer of fabric.
Secured to the fabric layer is an upper film layer. At least a portion of the exposed surface of the film layer is metalized or laminated with-foil.
3232e
ABSTRACT
A discharge spout on the bottom wall of a collapsible receptacle has an exterior layer which is grounded during the flow of material through the discharge spout to prevent buildup of static electric charge therein. The discharge spout is made from a metalized fabric having a lower layer of fabric.
Secured to the fabric layer is an upper film layer. At least a portion of the exposed surface of the film layer is metalized or laminated with-foil.
3232e
Description
1 30bO66 STATIC CONTROLLED DISCHARGE SPOUT
TECHNICAL FIELD
This invention relates to a collapsible receptacle which is useful in handling flowable materials in semi-bulk quantities, and more particularly to a collapsible plastic ~abric recep~acle having a discharge spout with a metalized outer surface to discharge static electricity.
TECHNICAL FIELD
This invention relates to a collapsible receptacle which is useful in handling flowable materials in semi-bulk quantities, and more particularly to a collapsible plastic ~abric recep~acle having a discharge spout with a metalized outer surface to discharge static electricity.
BACKGROUND
There has been increasing interest in the use of flexible, collapsible containers for handling semi-bulk quantities of particulate, granular and other ~lowable materials such as chemicals, minerals, fertili~ers, S foodstuffs, grains, and agricultural products. The advantages of such receptacles include relatively low weight, reduced cost, better versatility, and low return freight costs in the case of reusable receptacles.
Fabrics are often used in the construction of such containers for strength, flexibility and durability.
Traditionally, fabrics have been constructed of natural fibers; however, in recent years synthetic fibers manufactured from polypropylene or other plastics have come into extensive use because they are generally stronger and more durable than fabrics made of natural fiber.
The electrical characteristics of fabrics make their use undesirable in some circumstances. For ~ example, many qranular and liquid materials develop a static-electric charge through friction as they are poured into, discharged from or vibrated within a receptacle. Because ~.lbrics are not electrically 1 30~066 conductive, discharge of static-electricity rom such materials contained by ~a~ric receptacles is difficult, if not impossible, poslng the danger of explosion or fire caused by an electrical spark.
Previously, to reduce static electricity problems, a layer of metalized fabric or a metallic laminate such as an aluminum or other electrically conductive metal foil has been secured to the fabric and the fabric was used to construct a receptacle and a discharge spout with the foil laminate or metalized layer comprising the interior surface of the receptacle and the discharge spout. The metal layers were then grounded to eliminate static electricity.
Foil la~inates and metalized fabrics are, however, susceptible to abrasion, tearing and separation ~rom the underlying fabric, particularly along the edges of the foil laminate due to contact with the contents of the receptacle as the receptacle is filled, emptied or transported. Such abrasion quickly reduces the effectiveness of the foil layer as a grounding surface and often results in unwanted contamination of the contents of the bag with foil particles or flakes.
SUMMARY OF THE INVENTION
The present invention comprises a collapsible receptacle for handling materials in semi-bulk quantities having a metallized fabric discharge spout which eliminates statlc electric charge from the collapsible receptacle as flowable materials are discharged. The receptacle may have any of those designs known in the art such as those disclosed in U.~.
Patent No. 4~457,456. The receptacle is formed primarily of rectangular panels of flexible but substantially inextensible material such as woven polypropylene or woven polyethylene.
In accordance with one aspect of the invention there is provided a collapsible product receptacle comprising: a tu~ular side wall; a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product; a generally pliable cylindrical discharge spout located in the bottom wall for dispensing the product, the discharge spout comprisi.ng a continuous inner layer for contact with the product to be dispensed and a continuous outer layer having a continuous inner non-metallized surface securely bonded substantially throughout to the continuous inner layer and a continuous outer surface metallized to a level that is electrically conductive to the static electricity generated by contact of the dispensed product with the inner layer, said inner layer and said inner surface of said outer layer protecting said conductive metallized surface of said spout from wear and tear .
4a induced by direct contact with the dispensed product; and means for connecting the outer conductive surface of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
In accordance with another aspect of the invention there is provided a collapsible product receptacle comprising: a tubular side wall; a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product; a pliable discharge spout located in the bottom wall for dispensing the product, the discharge spout comprising a continuous inner layer of plastic fabric for contact with the product being dispensed and a continuous outer layer of plastic material having a continuous inner surface securely bonded substantially throughout to the plastic fabric by lamination and a continuous outer surface metallized to a level that is conductive to the static electricity generated by contact of the dispensed product with the plastic fabric; and means for connecting the electrically conductive outer layer of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
C
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete understanding of the invention can be had by reference to the following Detailed Description in conjunction with the accompanying Drawings, wherein:
FIGURE 1 is an illustration of the lower portion of a collapsible receptacle incorporating the discharge spout o the present invention for static electric charge elimination;
FIGURE 2 is an enlarged partial sectional view showing part of the bottom wall and part of the discharge spout of the receptacle of FIGURE l;
FIGURE 3 is a sectional view through the discharge spout of the receptacle of FIGURE l; and FIGURE 4 schematically illustrates a preferred method of construction of fabric for the discharge spout.
1 30~3066 DETAILED DESCPcIPT~ON
Referrinq now to the Drawings, wherein like reference numerals designate like or corresponding parts throughout the several views, and particularly referring to F~GURE 1, there is shown the lower portion of a collapsible receptacle 10 incorporating a static controlled tubular discharge spout 12 according to the present invention. The receptacle 10 has a side wall 14 and a bottom wall 16 both formed from fabric material, preferably woven polypropylene or woven polyethylene. The side wall 14 compri~ses a ractangular piece of fabric material rolled into a tubular configuration with the overlapping edges secured to each other by sewing, adhesives or a combination of both techniques. The bottom wall 16 is secured to the lower end of the side wall 14 to close the bottom of the receptacle 10.
The bottom wall 16 comprises a fabric layer 18 which is secured to the side wall 14, such as by means of sewing. Perpendicular slits are formed in the fabric layer 18 to de~ine a plurality of flaps 22 which in turn define a rectangular opening 26 in the fabric layer 18. The tubular discharge spout 12 is provided with a flange at its upper end which is secured to the interior of the ~abric layer 18 along a line of stitching 34.
1 3~0~6 As illustrated in FIGURES 1, ~ and 3, the discharge spout 12 has a woven fabric interior layer 38 and an electrically conductive exterior layer 40. As is best shown in FIGURE 3, the discharge spout lZ is formed 5 from a rectangular piece o~ ~abric rolled into a cylinger with the edges joined by means of a seam 42.
A typical alligator-type connector 44 forms an electrical connection with the conductive layer 40 and is in turn connected by a lead 46 to a source of ground potential. Those skilled in the art will appreciate the fact that various other conventional techniques may be used to ground the discharge spout 12 and conductive layer 40.
In earlier collapsible receptacles with no grounded conductive layer, static charges of up to 200,000 volts developed. This static electricity created a significant fire and safety hazard. In the the receptacle shown in FlGURES 4~-50 of U.S. Patent No.
4,457,456, a grounded inner conductive layer is used to eliminate the static electric charge. However, the inner layer of the receptacle is subject to deterioration through abrasive wear and tear.
The conductive l~yer 40 of the disch~rge spout 12 is grounded during ~he discharge o~ material :' ' therethrough. This prevents a buildup of static electric charge within the material as it is discharged from the collapsible receptacle 10 through the discharge spout 12. ~y maintaining the conductive layer 40 at ground potential, the static electric charge buildup from material flowing out of the receptacle lO is grounded and eliminated. In the present invention, grounding the conductive layer 40 eliminates the static electricity problem without wear and tear on the conductive layer 40 because the conductive layer 40 is not in contact with the material moving through the spout 30. It is presently not understood exactly why grounding the exterior surface of the discharge spout results in the elimination of static.
The receptacle 10 is preferably manufactured as described in U.S. Patent No. 4,457,456. Discharge spout 12 is similar to the discharge spout assembly 582 illustrated and described in FIGURES 48-50 of U.S.
Patent No. 4,457,456.
~ollapsible receptacle 10 may be constructed of any strong, flexible and substantially inextensible material. Natural or synthetic woven material such as jute, cotton, polyethylene, or polypropylene are examples of such materials. Woven polypropylene material is advantageous because of its strength, durability and puncture resistance.
The receptacle 10 is useful for handling semi-bulk quantities of virtually any flowabl-e material, including minerals, chemicals, fertilizers, foodstuffs, agricultural products and the like. The receptacle 10 is simply constructed and is therefor-e less expensive than collapsible receptacles incorporating other static discharge methods.
FIGURE 4 schematically illustrates the construction of the metalized fabric preferably used in constructing the discharge spout 12 of the present invention. A
roll 50 comprises a length of plastic fabric 52, such as woven polyethylene or polypropylene, having an upper surface 54 and an opposing lower surface 56. Supported above the roll 50 of plastic fabric is a roll 58 comprising a length of plastic film 60 having a metalized upper surface 64 and a lower sur~ace 66. The length of fabric 52 and the length of film 60 are manufactured from the same type of plastic. The film 60 is oriented in two substantially perpendicular directions, thereby strengthening the film against tearing or breaking.
The upper surface 64 of the length of film 60 is metallized continuously along its entire length by conventional methods to a level which is electrically conductive. For example, one such method includes vaporization of an electrically conductive metal in a vacuum.
The surface 64 of the length of film 60 is exposed to the metallic vapors within the vacuum while opposing electrical charges are imposed on the metal vapor and the film 60. The opposing charge causes the vapor to deposit or plate onto the film, forming a strong bond therebetween.
Typically, a metallic layer no more than one or two atoms thick is required to provide an electrically conductive surface. In the embodiment shown, aluminum is deposited on the length of film 60 due to its relatively low melting point and low cost. However, other electrically conductive metals, such as gold, silver, chromium, and the like may be used.
The film 60 is extrusion laminated to the fabric 52 by drawing the fabric 52 and the film 60 from rolls 50 and 58, respectively, through the nip between two compression rollers 68 and 70. Prior to passage of the film 60 and fabric 52 between the rollers 6 and 70, a thin layer of molten plastic of the same type from .
Qsn66 which the fabric 52 and the film 60 are manufactured is interposed between the lower, non-metalized surface of the film 60 and the upper surface 54 of the fabric 52 by a nozzle 72. Molt~n plastic is provided to the nozzle 72 from a supply 74 through a tube 76. As the fabric 52 and the metalized film 64 are compressed together between the rollers 68 and 70, the molten plastic partially melts both the non-metalized surface of the film 60 and the upper surface 54 of the fabric 52, resulting in a homogeneous layer of molten plastic which hardens when cooled to securely bond the film 60 to the underlying fabric 52. The resulting metalized fabric 78 exits from the compression rollers 68 and 70 and is collected on a take-up roll 80.
The fabric 78 may be cut into lengths of material to form discharge spout blanks. The discharge spout blank is rolled into a cylinder and the ends joined by the seam 42 to form a discharge spout 12 with an electrically conductive layer 40. The fabric 78 may also be used in the construction of a receptacle having an electrically conductive surface by using the techniques disclosed by U.S. Patent No. 4,457,456. The metalized surface will also protect the fabric 78 from the harmful effects o~ sunlight, ultraviolet radiation ~: 25 or other similar radiation.
~.
': :
... ~.', .
. ., ;' .~ ~ ,. , 1 3()8066 Although a preferred embodiment of the invention has been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiment disclosed, but is capable of numerous rearrangements, modifications and substitutions of parts and elements without departing from the spirit of the invention.
There has been increasing interest in the use of flexible, collapsible containers for handling semi-bulk quantities of particulate, granular and other ~lowable materials such as chemicals, minerals, fertili~ers, S foodstuffs, grains, and agricultural products. The advantages of such receptacles include relatively low weight, reduced cost, better versatility, and low return freight costs in the case of reusable receptacles.
Fabrics are often used in the construction of such containers for strength, flexibility and durability.
Traditionally, fabrics have been constructed of natural fibers; however, in recent years synthetic fibers manufactured from polypropylene or other plastics have come into extensive use because they are generally stronger and more durable than fabrics made of natural fiber.
The electrical characteristics of fabrics make their use undesirable in some circumstances. For ~ example, many qranular and liquid materials develop a static-electric charge through friction as they are poured into, discharged from or vibrated within a receptacle. Because ~.lbrics are not electrically 1 30~066 conductive, discharge of static-electricity rom such materials contained by ~a~ric receptacles is difficult, if not impossible, poslng the danger of explosion or fire caused by an electrical spark.
Previously, to reduce static electricity problems, a layer of metalized fabric or a metallic laminate such as an aluminum or other electrically conductive metal foil has been secured to the fabric and the fabric was used to construct a receptacle and a discharge spout with the foil laminate or metalized layer comprising the interior surface of the receptacle and the discharge spout. The metal layers were then grounded to eliminate static electricity.
Foil la~inates and metalized fabrics are, however, susceptible to abrasion, tearing and separation ~rom the underlying fabric, particularly along the edges of the foil laminate due to contact with the contents of the receptacle as the receptacle is filled, emptied or transported. Such abrasion quickly reduces the effectiveness of the foil layer as a grounding surface and often results in unwanted contamination of the contents of the bag with foil particles or flakes.
SUMMARY OF THE INVENTION
The present invention comprises a collapsible receptacle for handling materials in semi-bulk quantities having a metallized fabric discharge spout which eliminates statlc electric charge from the collapsible receptacle as flowable materials are discharged. The receptacle may have any of those designs known in the art such as those disclosed in U.~.
Patent No. 4~457,456. The receptacle is formed primarily of rectangular panels of flexible but substantially inextensible material such as woven polypropylene or woven polyethylene.
In accordance with one aspect of the invention there is provided a collapsible product receptacle comprising: a tu~ular side wall; a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product; a generally pliable cylindrical discharge spout located in the bottom wall for dispensing the product, the discharge spout comprisi.ng a continuous inner layer for contact with the product to be dispensed and a continuous outer layer having a continuous inner non-metallized surface securely bonded substantially throughout to the continuous inner layer and a continuous outer surface metallized to a level that is electrically conductive to the static electricity generated by contact of the dispensed product with the inner layer, said inner layer and said inner surface of said outer layer protecting said conductive metallized surface of said spout from wear and tear .
4a induced by direct contact with the dispensed product; and means for connecting the outer conductive surface of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
In accordance with another aspect of the invention there is provided a collapsible product receptacle comprising: a tubular side wall; a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product; a pliable discharge spout located in the bottom wall for dispensing the product, the discharge spout comprising a continuous inner layer of plastic fabric for contact with the product being dispensed and a continuous outer layer of plastic material having a continuous inner surface securely bonded substantially throughout to the plastic fabric by lamination and a continuous outer surface metallized to a level that is conductive to the static electricity generated by contact of the dispensed product with the plastic fabric; and means for connecting the electrically conductive outer layer of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
C
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete understanding of the invention can be had by reference to the following Detailed Description in conjunction with the accompanying Drawings, wherein:
FIGURE 1 is an illustration of the lower portion of a collapsible receptacle incorporating the discharge spout o the present invention for static electric charge elimination;
FIGURE 2 is an enlarged partial sectional view showing part of the bottom wall and part of the discharge spout of the receptacle of FIGURE l;
FIGURE 3 is a sectional view through the discharge spout of the receptacle of FIGURE l; and FIGURE 4 schematically illustrates a preferred method of construction of fabric for the discharge spout.
1 30~3066 DETAILED DESCPcIPT~ON
Referrinq now to the Drawings, wherein like reference numerals designate like or corresponding parts throughout the several views, and particularly referring to F~GURE 1, there is shown the lower portion of a collapsible receptacle 10 incorporating a static controlled tubular discharge spout 12 according to the present invention. The receptacle 10 has a side wall 14 and a bottom wall 16 both formed from fabric material, preferably woven polypropylene or woven polyethylene. The side wall 14 compri~ses a ractangular piece of fabric material rolled into a tubular configuration with the overlapping edges secured to each other by sewing, adhesives or a combination of both techniques. The bottom wall 16 is secured to the lower end of the side wall 14 to close the bottom of the receptacle 10.
The bottom wall 16 comprises a fabric layer 18 which is secured to the side wall 14, such as by means of sewing. Perpendicular slits are formed in the fabric layer 18 to de~ine a plurality of flaps 22 which in turn define a rectangular opening 26 in the fabric layer 18. The tubular discharge spout 12 is provided with a flange at its upper end which is secured to the interior of the ~abric layer 18 along a line of stitching 34.
1 3~0~6 As illustrated in FIGURES 1, ~ and 3, the discharge spout 12 has a woven fabric interior layer 38 and an electrically conductive exterior layer 40. As is best shown in FIGURE 3, the discharge spout lZ is formed 5 from a rectangular piece o~ ~abric rolled into a cylinger with the edges joined by means of a seam 42.
A typical alligator-type connector 44 forms an electrical connection with the conductive layer 40 and is in turn connected by a lead 46 to a source of ground potential. Those skilled in the art will appreciate the fact that various other conventional techniques may be used to ground the discharge spout 12 and conductive layer 40.
In earlier collapsible receptacles with no grounded conductive layer, static charges of up to 200,000 volts developed. This static electricity created a significant fire and safety hazard. In the the receptacle shown in FlGURES 4~-50 of U.S. Patent No.
4,457,456, a grounded inner conductive layer is used to eliminate the static electric charge. However, the inner layer of the receptacle is subject to deterioration through abrasive wear and tear.
The conductive l~yer 40 of the disch~rge spout 12 is grounded during ~he discharge o~ material :' ' therethrough. This prevents a buildup of static electric charge within the material as it is discharged from the collapsible receptacle 10 through the discharge spout 12. ~y maintaining the conductive layer 40 at ground potential, the static electric charge buildup from material flowing out of the receptacle lO is grounded and eliminated. In the present invention, grounding the conductive layer 40 eliminates the static electricity problem without wear and tear on the conductive layer 40 because the conductive layer 40 is not in contact with the material moving through the spout 30. It is presently not understood exactly why grounding the exterior surface of the discharge spout results in the elimination of static.
The receptacle 10 is preferably manufactured as described in U.S. Patent No. 4,457,456. Discharge spout 12 is similar to the discharge spout assembly 582 illustrated and described in FIGURES 48-50 of U.S.
Patent No. 4,457,456.
~ollapsible receptacle 10 may be constructed of any strong, flexible and substantially inextensible material. Natural or synthetic woven material such as jute, cotton, polyethylene, or polypropylene are examples of such materials. Woven polypropylene material is advantageous because of its strength, durability and puncture resistance.
The receptacle 10 is useful for handling semi-bulk quantities of virtually any flowabl-e material, including minerals, chemicals, fertilizers, foodstuffs, agricultural products and the like. The receptacle 10 is simply constructed and is therefor-e less expensive than collapsible receptacles incorporating other static discharge methods.
FIGURE 4 schematically illustrates the construction of the metalized fabric preferably used in constructing the discharge spout 12 of the present invention. A
roll 50 comprises a length of plastic fabric 52, such as woven polyethylene or polypropylene, having an upper surface 54 and an opposing lower surface 56. Supported above the roll 50 of plastic fabric is a roll 58 comprising a length of plastic film 60 having a metalized upper surface 64 and a lower sur~ace 66. The length of fabric 52 and the length of film 60 are manufactured from the same type of plastic. The film 60 is oriented in two substantially perpendicular directions, thereby strengthening the film against tearing or breaking.
The upper surface 64 of the length of film 60 is metallized continuously along its entire length by conventional methods to a level which is electrically conductive. For example, one such method includes vaporization of an electrically conductive metal in a vacuum.
The surface 64 of the length of film 60 is exposed to the metallic vapors within the vacuum while opposing electrical charges are imposed on the metal vapor and the film 60. The opposing charge causes the vapor to deposit or plate onto the film, forming a strong bond therebetween.
Typically, a metallic layer no more than one or two atoms thick is required to provide an electrically conductive surface. In the embodiment shown, aluminum is deposited on the length of film 60 due to its relatively low melting point and low cost. However, other electrically conductive metals, such as gold, silver, chromium, and the like may be used.
The film 60 is extrusion laminated to the fabric 52 by drawing the fabric 52 and the film 60 from rolls 50 and 58, respectively, through the nip between two compression rollers 68 and 70. Prior to passage of the film 60 and fabric 52 between the rollers 6 and 70, a thin layer of molten plastic of the same type from .
Qsn66 which the fabric 52 and the film 60 are manufactured is interposed between the lower, non-metalized surface of the film 60 and the upper surface 54 of the fabric 52 by a nozzle 72. Molt~n plastic is provided to the nozzle 72 from a supply 74 through a tube 76. As the fabric 52 and the metalized film 64 are compressed together between the rollers 68 and 70, the molten plastic partially melts both the non-metalized surface of the film 60 and the upper surface 54 of the fabric 52, resulting in a homogeneous layer of molten plastic which hardens when cooled to securely bond the film 60 to the underlying fabric 52. The resulting metalized fabric 78 exits from the compression rollers 68 and 70 and is collected on a take-up roll 80.
The fabric 78 may be cut into lengths of material to form discharge spout blanks. The discharge spout blank is rolled into a cylinder and the ends joined by the seam 42 to form a discharge spout 12 with an electrically conductive layer 40. The fabric 78 may also be used in the construction of a receptacle having an electrically conductive surface by using the techniques disclosed by U.S. Patent No. 4,457,456. The metalized surface will also protect the fabric 78 from the harmful effects o~ sunlight, ultraviolet radiation ~: 25 or other similar radiation.
~.
': :
... ~.', .
. ., ;' .~ ~ ,. , 1 3()8066 Although a preferred embodiment of the invention has been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiment disclosed, but is capable of numerous rearrangements, modifications and substitutions of parts and elements without departing from the spirit of the invention.
Claims (2)
1. A collapsible product receptacle comprising:
a tubular side wall;
a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product;
a generally pliable cylindrical discharge spout located in the bottom wall for dispensing the product, the discharge spout comprising a continuous inner layer for contact with the product to be dispensed and a continuous outer layer having a continuous inner non-metallized surface securely bonded substantially throughout to the continuous inner layer and a continuous outer surface metallized to a level that is electrically conductive to the static electricity generated by contact of the dispensed product with the inner layer, said inner layer and said inner surface of said outer layer protecting said conductive metallized surface of said spout from wear and tear induced by direct contact with the dispensed product; and means for connecting the outer conductive surface of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
a tubular side wall;
a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product;
a generally pliable cylindrical discharge spout located in the bottom wall for dispensing the product, the discharge spout comprising a continuous inner layer for contact with the product to be dispensed and a continuous outer layer having a continuous inner non-metallized surface securely bonded substantially throughout to the continuous inner layer and a continuous outer surface metallized to a level that is electrically conductive to the static electricity generated by contact of the dispensed product with the inner layer, said inner layer and said inner surface of said outer layer protecting said conductive metallized surface of said spout from wear and tear induced by direct contact with the dispensed product; and means for connecting the outer conductive surface of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
2. A collapsible product receptacle comprising:
a tubular side wall;
a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product;
a pliable discharge spout located in the bottom wall for dispensing the product, the discharge spout comprising a continuous inner layer of plastic fabric for contact with the product being dispensed and a continuous outer layer of plastic material having a continuous inner surface securely bonded substantially throughout to the plastic fabric by lamination and a continuous outer surface metallized to a level that is conductive to the static electricity generated by contact of the dispensed product with the plastic fabric;
and means for connecting the electrically conductive outer layer of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
a tubular side wall;
a bottom wall secured to the side wall around the lower end thereof for closing the lower end of the receptacle to retain the product;
a pliable discharge spout located in the bottom wall for dispensing the product, the discharge spout comprising a continuous inner layer of plastic fabric for contact with the product being dispensed and a continuous outer layer of plastic material having a continuous inner surface securely bonded substantially throughout to the plastic fabric by lamination and a continuous outer surface metallized to a level that is conductive to the static electricity generated by contact of the dispensed product with the plastic fabric;
and means for connecting the electrically conductive outer layer of the discharge spout to a source of predetermined electrical potential to control the buildup of static electricity in the receptacle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000556860A CA1308066C (en) | 1988-01-19 | 1988-01-19 | Static controlled discharge spout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000556860A CA1308066C (en) | 1988-01-19 | 1988-01-19 | Static controlled discharge spout |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1308066C true CA1308066C (en) | 1992-09-29 |
Family
ID=4137287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000556860A Expired - Fee Related CA1308066C (en) | 1988-01-19 | 1988-01-19 | Static controlled discharge spout |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1308066C (en) |
-
1988
- 1988-01-19 CA CA000556860A patent/CA1308066C/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0098694B1 (en) | Textile materials and their use in containers | |
| EP1893407B1 (en) | Multi-layer film comprising a barrier layer and an antistatic layer | |
| US4833008A (en) | Metalized fabric | |
| US5244281A (en) | Static controlled collapsible receptacle | |
| EP0703162B1 (en) | Recycleable bulk bag containers | |
| US4457456A (en) | Collapsible receptacle with static electric charge elimination | |
| US6179467B1 (en) | Woven polypropylene bulk bag with polypropylene lining or liner and process for manufacturing same | |
| US4878600A (en) | Static controlled discharge spout | |
| CZ223995A3 (en) | Plastic packing with enhanced electrostatic discharge ability | |
| CA1117919A (en) | Plastic bag handle construction | |
| EP0413886A1 (en) | High resistance synthetic fibre fabric, as well as bulk storage container and strap formed from this fabric | |
| US4909410A (en) | Protective cover for bulk container | |
| EP2301859A1 (en) | Stand bag made of a heat sealable plastic film and method for its manufacture | |
| US6451407B1 (en) | Anti-static films and anti-static fabrics for use in manufacturing bulk liners and bulk bags | |
| US4865218A (en) | Protective cover for bulk container | |
| US5212337A (en) | Plastic storage and transporation container for loose cartridges | |
| CA1308066C (en) | Static controlled discharge spout | |
| AU620800B2 (en) | Extrusion coated circular woven fabric | |
| GB1591323A (en) | Freight containers for bulk storage transporters | |
| SK279593B6 (en) | Flexible packaging material | |
| US20150266668A1 (en) | Transporting bag having conductive property | |
| DE3539619C1 (en) | Packaging for granular or small-grain products with a high degree of purity, and method for filling, transporting and emptying the packaging | |
| FI89889B (en) | FOERFARANDE ATT FRAMSTAELLA EN BEHAOLLARESAECK | |
| CA1297768C (en) | Metalized fabric | |
| GB1581437A (en) | Containers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |