CA2044582A1 - Stand-up bag - Google Patents
Stand-up bagInfo
- Publication number
- CA2044582A1 CA2044582A1 CA 2044582 CA2044582A CA2044582A1 CA 2044582 A1 CA2044582 A1 CA 2044582A1 CA 2044582 CA2044582 CA 2044582 CA 2044582 A CA2044582 A CA 2044582A CA 2044582 A1 CA2044582 A1 CA 2044582A1
- Authority
- CA
- Canada
- Prior art keywords
- stand
- sheet
- bag according
- bag
- sidewalls
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5861—Spouts
- B65D75/5872—Non-integral spouts
- B65D75/5877—Non-integral spouts connected to a planar surface of the package wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/008—Standing pouches, i.e. "Standbeutel"
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Packages (AREA)
Abstract
Abstract of the Disclosure The invention relates to a stand-up bag made of a heat-sealable or weldable plastic sheet material and adapted to contain liquid and/or pasty products.
For providing a stand-up bag of this type, which permits its contents to be?dispensed in individual metered port-ions, is designed for simple handling and conveying and for simple production and space-saving storage in the unfilled state, the invention provides that the stand-up bag is provided with a dispensing opening defined by a closeable dispenser spout having one of its ends provided with a flange by means of which it is secured to a top portion of a sidewall of the bag.
For providing a stand-up bag of this type, which permits its contents to be?dispensed in individual metered port-ions, is designed for simple handling and conveying and for simple production and space-saving storage in the unfilled state, the invention provides that the stand-up bag is provided with a dispensing opening defined by a closeable dispenser spout having one of its ends provided with a flange by means of which it is secured to a top portion of a sidewall of the bag.
Description
-- 2 ~ 8 2 1 Stand-Up Bag Description 5 The present invention relates to a stand-up bag made of a heat-sealable or weldable plastic sheet material and adapted to contain liquid and/or pasty products, said stand-up bag being provided with a dispensing opening and comprising two substantially rectangular flat sidewall-10 forming sheet elements sealed to one another along theirlongitudinal margins, a foldable bottom element acting as a support bottom and adapted to lie between said sidewalls being interposed between the lower transverse edges, and a foldable sheet element acting as a top wall and adapted to lie between said sidewalls being interposed between said sidewalls adjacent the upper ends thereof.
Stand-up bags made of plastic sheet material are specific-ally known as disposable beverage packages. Packages of this type usually terminate in a pointed end and have a 20 f~lling volume of o.2 litres. The sheet material employed for these beverage packages is provided with a thin aluminum sheet layer serving amongst other purposes to stabilize the package. The bottom side is provided with a support bottom surface permitting the bag to be placed on 25a support after having been opened, without the danger of - the bag's contents spilling from the dispensing opening or of the bag toppling over. In beverage packages of this type the dispensing opening may for instance be determined by a pierceable weakened wall portion capable of being pierced 30by a drinking straw terminating in a pointed end.
Aside from beverages, sheet bags are also used for filling them with other liquid or pasty products, for instance liquid detergents. Sheet bags of this type are especially used as refill packages.
35In order to impart increased stability to such stand-up bags comprising a lower bottom wall interposed between the side-walls, and preferably composed of two wall elements welded ; 2~44582 1 to one another, an additional top wall element is provided in an arrangement similar to that of the bottom wall.
The basic advantage of such sheet bags can be seen in the fact that they can be folded extremely flat in their empty 5 state so as to require little space. Particularly stand-up bags of a greater volume, for instance a volume of up to two litres, are practically never used for containing products to be dispensed in individual portions, because afetr opening the bag, as by cutting off an upper corner 10 portion, it is not ensured that the bag retains sufficient stability to remain standing when air enters its interior and the contents have been partially dispensed.
It is an object of the invention to provide a stand-up bag which is capable of retaining sufficient stability after its contents have been partially dispensed, and of being readily handled and conveyed, which can be manufactured in a simple manner and requires little storage space in its unfilled state.
20 This object is attained according to the invention by the provision that the dispensing opening is defined by a closeable dispenser spout provided at one of its ends with a flange by means of which it is secured to a top portion of one of the sidewalls. The closeable dispenser spout 25 permits the contents of the stand-up bag to be dispensed in - individual portions. The dispenser spout is located at an upper portion of the sidewalls, so that the stand-up bag can be placed on its bottom wall in a standing position without its contents spilling from the opened dispenser 30 spout. To this purpose it is essential that the stand-up bag has a stable shape, which is ensured by the provision of the stand-up bag with an additional top wall element substantially similar to the bottom wall element. The flange provided at one end of the dispenser spout permits the 35 latter to be sealingly inserted or welded to a sidewall of the stand-up bag. The flange is preferably in contact with and sealed to the inner side of the sidewall, with the dispenser spout projecting through an opening formed in the 2 ~ 8 2 sidewall. The flange should have a width of between 4 mm and 8 mm, so tha-t a sufficiently large sealing surface is provided for sealingly bond the flange to the sidewall.
The thickness of the flange should be no more than 2 mm, so that the wall thickness of the stand-up back is not unnecessarily increased, particularly with a view to the space-saving storage of the empty bag in its folded state.
For permitting it to be closed, the dispenser spout should be provided, preferably at its outer end, with exterior threads permitting a closure cap to be threaded thereonto.
This construction permits the stand-up bag to be hermetic-ally closed to thereby prevent any leakage even of highly fluid contents. As an alternative, the dispenser spout may be provided with ~uick-stop closure means comprising for instance radial projections or undercut portions formed on the outer surface of the dispenser spout and adapted to have a protective cap clamped thereonto. A
protective cap of this kind can be clamped onto the dispenser spout and removed therefrom by overcoming a slight resistance.
In order to permit the interior volume of the stand-up bag to be used as fully as possible, the dispenser spout is preferably spaced by no more than 10 mm from the weld seam formed between the sidewall and the top wall, and located at a central position between the two weld seams inter-connecting the two sidewalls.
For the purpose of mass production i-t may be advantageous to maintain a stock of different types of dispensing spouts, for instance ones having different diameters at their ends, which are then sealingly fitted to an aperture punched in the respective side wall. In order to permit sidewalls with punched openings of preferably circular shape and the same diameter to be employed in combination with different dispenser spouts, the base portion of each dispenser spout adjacent the flange should be provided with an auxiliary flange portion having a diameter corresponding to that of the punched sidewall openings.
2~582 l For facilitating the handling of the stand-up bag, it is provided with grip openings formed in sidewall extensions projecting above the top wall. These grip openings, which may in a preferred simple embodiment for instance be formed 5 by punched slits, are readily accessible at their location above the top wall. The grip openings may be formed in a particularly simple manner by punching the sidewalls of' the bag in its folded state at congruent positions, so that they are located diametrally opposite one another in the lO filled state of the bag. For ensuring the uniform distrib-ution in the sidewalls of traction forces at the location of the grip openings, the latter may extend substantially parallel to the weld seam between the sidewalls and the top wall.
l5 The stand-up bag is composed of pre-cut heat-sealable flat elements preferably of a twin-layer compound sheet material.
Excellent results are achieved when the layer facing towards the interior is a polyethylene sheet, and the layer forming the outer skin, a polyester sheet. The employ of a poly-20 ethylene sheet in the form of a coextrusion sheet - i.e.
a multiple-layer sheet material - offfers the advantage that the layer forming the interior wall of the stand-up bag can be adapted to various requirements in accordance with the intended use of the stand-up bag. The side of the 25 sheet material to be sealed may thus for instance be formed of a particularly readily sealable material; a coextrusion sheet material of this kind also offers the possibility of achieving an increased stiffness or stability by proper selection of its composition. The thickness o~ the outwards 30 facing polyester sheet is at least 10 ,um, and preferably 12 ym, while the inwards facing polyethylene sheet or coextrusion sheet should have a thickness of 80 ym to 200 ym, preferably a thickness of 100 ,um to 150 ~m. In order to permit the stand-up bag to be filled with solvent-contain-36 ing or migration-sensitive products, a thin aluminum sheet acting as a barrier layer may be enclosed between layers of' the sheet material, preferably adjacent the inwards facing layer. This aluminum sheet should have a thickness -` 2~4~8~
l of between ~ ,um and 12 ,um, depending on the size of the stand-up bag. An aluminum layer of this kind is effective for instance to prevent the leakage of solvents through the walls of the bag or, in the case of migration-sensitive 5 products, the infiltration of oxygen into the bag and thus into the product.
For achieving optirnum stability or standing ability of the bag, the latter is advantageously designed so as to assume a substantially cylindrical shape in its filled state. To 10 this purpose the two sidewalls are cut to a rectangular shape and sealed to one another along their longitudinal margins. In this embodiment the bottom wall element and the top wall element are formed as substantially circular cuttings. The bottom and top wall elements are welded to 15 the sidewalls of the collapsed or folded bag along respect-ive semicircular weld seams. As an alternative to the rect-angular shape of the sidewalls or the cylindrical shape of the filled bag~ respectively, The sidewalls may be slightly convergent towards the top wall element, resulting in a 20 frusto-conical configuration of the filled stand-up bag.
An embodiment of the invention shall now be described in more detail by way of example with reference to the accompanying drawings, wherein:
2sfig. 1 shows a perspective view of a filled stand-up bag, fig. 2 shows the stand-up bag of fig. 1 in its empty and folded state, in a sectional view taken along the line II-II in fig. 3, fig. 3 shows a top plan view of the stand-up bag of fig. 1 in its empty and folded state, fig. 4 shows a sectional view of the dispensing opening taken along the line IV-IV inlfig. 3, and fig. 5 shows a sectional view of the plastic sheet material used for making the stand-up bag.
As shown in figs. 1 and 3, the illustrated stand-up bag has two sidewalls 1 heat-sealed to one another at their 2~582 1 vertically extending longitudinal margins 2 by respective sealing or weld seams 3. Interposed between sidewalls 1 along their lower transverse margins 4 is a bottom wall element 5 acting as a stand-up support bottom and formed 5 as a circular or elliptical cutting as clearly apparent from the bottom weld seam 6 depicted in figs. 1 and 3.
Bottom wall element 5 and sidewalls 1 are welded to each other in surface contact over the entire area between bottom weld seam 6 and lower transverse margins 4, so 10 that the thus obtained twin-layer plastic sheet acts as a reinforced wall of the lower portion of the bag.
In the filled state of the bag bottom wall element 5 assumes a sagging shape, at least at its central portion, so that it rests on a support surface on which the stand-up 15 bag is placed. The sagg~ng portion of bottom wall element 5 cooperates with the reinforced lower transverse edges 4 to impart excellent standing ability to the stand-up bag. One of the two sidewalls is provided with a dispenser spout 7 at its upper portion.
All of the cuttings used for making the stand-up bag consist of a twin-layer plastic sheet material of the type depicted in cross-section in fig. 5. The outwards facing sheet 8 acting as the outer skin is a polyester sheet hav-ing a thickness of 12 ,um, while the sheet 10 facing towards _ the interior 9 of the stand-up bag and acting as the inner skin is a polyethylene sheet formed as a coextrusion sheet.
A coextrusion sheet of this kind has a multiple-layer construction which may be varied during the extrusion process for adaptation to specific requirements in accord-ance with its intended use. Sheet 10 has a thickness of 150 ~um, the sheet thicknesses stated above being applicable in the case of a stand-up bag having a capacity of about 1 to 1.5 litres, or a maximum capacity of 2 litres.
Enclosed between sheet 8 acting as the outer skin and 35 sheet 10 acting as the inner skin is a thin aluminum sheet 10' acting as a barrier layer and having a thickness of between 8 ,um and 12 ~m, depending on the size of the 2~4~82 l stand-up bag. An aluminum layer of this kind is effective for instance to prevent the leakage of solvents through the walls of the bag or, in the case of migration-sensitive products, the infiltration of oxygen ~nto the bag and 5 thus into the product.
The stand-up bag has substantially cylindrical outer con-tours in its filled state thanks to the provision of a top wall element 11 of a shape corresponding to that of bottom wall element 5 and welded to upper portions of lO sidewalls 1. By contrast to weld seam 6 of bottom wall 5, the weld seam 12 of top wall element 11 extends along a circular-arcuate path with its open side facing downwards, i.e. it is formed as a mirror image of weld seam 6 of bottom wall 5. Bottom wall element 5 and top wall element 15 11 are each formed with a folding seam 13 extending between weld seams 3 of sidewalls 1 as illustrated in fig. 3.
The dispensing opening of the bag defined by dispenser spout 7 is located adjacent folding seam 13 of top wall 11.
Dispenser spout 7 has its base end provided with a flange 14 by means of which it is sealingly secured to the inner side of the inwards facing sheet 10. Dispenser spout 7 projects from sidewall 1 of the stand-up bag by about 15 mm to 20 mm and is closed by a closure cap 15 provided with screw threads 16. Closure cap 15 may be provided wlth a _ sealing gasket 17 inserted therein. As indicated in fig. 4, flange 14 has a width 18 of about 5 mm, and a thickness 19 of about 1.5 mm. The rim of flange 14 is spaced from top wall weld seam 12 by about 5 mm to 10 mm and located at a central position between weld seasm 3 of sidewalls 1 inter-connected at thelr longltudlnal marglns 2.
Sidewalls 1 are extended upwards beyond top wall 11, the thus extended portions of the sidewalls being of sufficient length for punchign grip openings 20 therein. In the folded 35state of the stand-up bag illustrated in fig. 3, the grip openings 20 in the two sidewalls 1 are superimposed at congruent positions, so that they can be formed in a single punching operation. By contrast to the grip openings 20 2~5~2 1 of the stand-up bag shown in fig. 3, in which embodiment the sheet portions separated by the slit-shaped openings are pushed aside when the stand-up bag is to be carried, the grip openings may also be provided in the shape of 5 horizontally extending elongate openings. The grip openings 20 are of an arcuate shape approximately corresponding to that of top wall weld seam 12. The upper portion of the stand-up bag between top wall weld seam 12 and the upper transverse margin 21 may likewise be formed as a twin-layer 10 sheet construction formed by the upper extensions of sidewalls 1 and upwards folded sections of the cutting used for forming top wall 11, resulting in a reinforced structure of the wall portions in which grip openings 20 are located. These reinforced upper wall portions may for 15 instance be provided with an additional perforation 22 permitting the stand-up bag to be suspended from a peg or the like.
Stand-up bags made of plastic sheet material are specific-ally known as disposable beverage packages. Packages of this type usually terminate in a pointed end and have a 20 f~lling volume of o.2 litres. The sheet material employed for these beverage packages is provided with a thin aluminum sheet layer serving amongst other purposes to stabilize the package. The bottom side is provided with a support bottom surface permitting the bag to be placed on 25a support after having been opened, without the danger of - the bag's contents spilling from the dispensing opening or of the bag toppling over. In beverage packages of this type the dispensing opening may for instance be determined by a pierceable weakened wall portion capable of being pierced 30by a drinking straw terminating in a pointed end.
Aside from beverages, sheet bags are also used for filling them with other liquid or pasty products, for instance liquid detergents. Sheet bags of this type are especially used as refill packages.
35In order to impart increased stability to such stand-up bags comprising a lower bottom wall interposed between the side-walls, and preferably composed of two wall elements welded ; 2~44582 1 to one another, an additional top wall element is provided in an arrangement similar to that of the bottom wall.
The basic advantage of such sheet bags can be seen in the fact that they can be folded extremely flat in their empty 5 state so as to require little space. Particularly stand-up bags of a greater volume, for instance a volume of up to two litres, are practically never used for containing products to be dispensed in individual portions, because afetr opening the bag, as by cutting off an upper corner 10 portion, it is not ensured that the bag retains sufficient stability to remain standing when air enters its interior and the contents have been partially dispensed.
It is an object of the invention to provide a stand-up bag which is capable of retaining sufficient stability after its contents have been partially dispensed, and of being readily handled and conveyed, which can be manufactured in a simple manner and requires little storage space in its unfilled state.
20 This object is attained according to the invention by the provision that the dispensing opening is defined by a closeable dispenser spout provided at one of its ends with a flange by means of which it is secured to a top portion of one of the sidewalls. The closeable dispenser spout 25 permits the contents of the stand-up bag to be dispensed in - individual portions. The dispenser spout is located at an upper portion of the sidewalls, so that the stand-up bag can be placed on its bottom wall in a standing position without its contents spilling from the opened dispenser 30 spout. To this purpose it is essential that the stand-up bag has a stable shape, which is ensured by the provision of the stand-up bag with an additional top wall element substantially similar to the bottom wall element. The flange provided at one end of the dispenser spout permits the 35 latter to be sealingly inserted or welded to a sidewall of the stand-up bag. The flange is preferably in contact with and sealed to the inner side of the sidewall, with the dispenser spout projecting through an opening formed in the 2 ~ 8 2 sidewall. The flange should have a width of between 4 mm and 8 mm, so tha-t a sufficiently large sealing surface is provided for sealingly bond the flange to the sidewall.
The thickness of the flange should be no more than 2 mm, so that the wall thickness of the stand-up back is not unnecessarily increased, particularly with a view to the space-saving storage of the empty bag in its folded state.
For permitting it to be closed, the dispenser spout should be provided, preferably at its outer end, with exterior threads permitting a closure cap to be threaded thereonto.
This construction permits the stand-up bag to be hermetic-ally closed to thereby prevent any leakage even of highly fluid contents. As an alternative, the dispenser spout may be provided with ~uick-stop closure means comprising for instance radial projections or undercut portions formed on the outer surface of the dispenser spout and adapted to have a protective cap clamped thereonto. A
protective cap of this kind can be clamped onto the dispenser spout and removed therefrom by overcoming a slight resistance.
In order to permit the interior volume of the stand-up bag to be used as fully as possible, the dispenser spout is preferably spaced by no more than 10 mm from the weld seam formed between the sidewall and the top wall, and located at a central position between the two weld seams inter-connecting the two sidewalls.
For the purpose of mass production i-t may be advantageous to maintain a stock of different types of dispensing spouts, for instance ones having different diameters at their ends, which are then sealingly fitted to an aperture punched in the respective side wall. In order to permit sidewalls with punched openings of preferably circular shape and the same diameter to be employed in combination with different dispenser spouts, the base portion of each dispenser spout adjacent the flange should be provided with an auxiliary flange portion having a diameter corresponding to that of the punched sidewall openings.
2~582 l For facilitating the handling of the stand-up bag, it is provided with grip openings formed in sidewall extensions projecting above the top wall. These grip openings, which may in a preferred simple embodiment for instance be formed 5 by punched slits, are readily accessible at their location above the top wall. The grip openings may be formed in a particularly simple manner by punching the sidewalls of' the bag in its folded state at congruent positions, so that they are located diametrally opposite one another in the lO filled state of the bag. For ensuring the uniform distrib-ution in the sidewalls of traction forces at the location of the grip openings, the latter may extend substantially parallel to the weld seam between the sidewalls and the top wall.
l5 The stand-up bag is composed of pre-cut heat-sealable flat elements preferably of a twin-layer compound sheet material.
Excellent results are achieved when the layer facing towards the interior is a polyethylene sheet, and the layer forming the outer skin, a polyester sheet. The employ of a poly-20 ethylene sheet in the form of a coextrusion sheet - i.e.
a multiple-layer sheet material - offfers the advantage that the layer forming the interior wall of the stand-up bag can be adapted to various requirements in accordance with the intended use of the stand-up bag. The side of the 25 sheet material to be sealed may thus for instance be formed of a particularly readily sealable material; a coextrusion sheet material of this kind also offers the possibility of achieving an increased stiffness or stability by proper selection of its composition. The thickness o~ the outwards 30 facing polyester sheet is at least 10 ,um, and preferably 12 ym, while the inwards facing polyethylene sheet or coextrusion sheet should have a thickness of 80 ym to 200 ym, preferably a thickness of 100 ,um to 150 ~m. In order to permit the stand-up bag to be filled with solvent-contain-36 ing or migration-sensitive products, a thin aluminum sheet acting as a barrier layer may be enclosed between layers of' the sheet material, preferably adjacent the inwards facing layer. This aluminum sheet should have a thickness -` 2~4~8~
l of between ~ ,um and 12 ,um, depending on the size of the stand-up bag. An aluminum layer of this kind is effective for instance to prevent the leakage of solvents through the walls of the bag or, in the case of migration-sensitive 5 products, the infiltration of oxygen into the bag and thus into the product.
For achieving optirnum stability or standing ability of the bag, the latter is advantageously designed so as to assume a substantially cylindrical shape in its filled state. To 10 this purpose the two sidewalls are cut to a rectangular shape and sealed to one another along their longitudinal margins. In this embodiment the bottom wall element and the top wall element are formed as substantially circular cuttings. The bottom and top wall elements are welded to 15 the sidewalls of the collapsed or folded bag along respect-ive semicircular weld seams. As an alternative to the rect-angular shape of the sidewalls or the cylindrical shape of the filled bag~ respectively, The sidewalls may be slightly convergent towards the top wall element, resulting in a 20 frusto-conical configuration of the filled stand-up bag.
An embodiment of the invention shall now be described in more detail by way of example with reference to the accompanying drawings, wherein:
2sfig. 1 shows a perspective view of a filled stand-up bag, fig. 2 shows the stand-up bag of fig. 1 in its empty and folded state, in a sectional view taken along the line II-II in fig. 3, fig. 3 shows a top plan view of the stand-up bag of fig. 1 in its empty and folded state, fig. 4 shows a sectional view of the dispensing opening taken along the line IV-IV inlfig. 3, and fig. 5 shows a sectional view of the plastic sheet material used for making the stand-up bag.
As shown in figs. 1 and 3, the illustrated stand-up bag has two sidewalls 1 heat-sealed to one another at their 2~582 1 vertically extending longitudinal margins 2 by respective sealing or weld seams 3. Interposed between sidewalls 1 along their lower transverse margins 4 is a bottom wall element 5 acting as a stand-up support bottom and formed 5 as a circular or elliptical cutting as clearly apparent from the bottom weld seam 6 depicted in figs. 1 and 3.
Bottom wall element 5 and sidewalls 1 are welded to each other in surface contact over the entire area between bottom weld seam 6 and lower transverse margins 4, so 10 that the thus obtained twin-layer plastic sheet acts as a reinforced wall of the lower portion of the bag.
In the filled state of the bag bottom wall element 5 assumes a sagging shape, at least at its central portion, so that it rests on a support surface on which the stand-up 15 bag is placed. The sagg~ng portion of bottom wall element 5 cooperates with the reinforced lower transverse edges 4 to impart excellent standing ability to the stand-up bag. One of the two sidewalls is provided with a dispenser spout 7 at its upper portion.
All of the cuttings used for making the stand-up bag consist of a twin-layer plastic sheet material of the type depicted in cross-section in fig. 5. The outwards facing sheet 8 acting as the outer skin is a polyester sheet hav-ing a thickness of 12 ,um, while the sheet 10 facing towards _ the interior 9 of the stand-up bag and acting as the inner skin is a polyethylene sheet formed as a coextrusion sheet.
A coextrusion sheet of this kind has a multiple-layer construction which may be varied during the extrusion process for adaptation to specific requirements in accord-ance with its intended use. Sheet 10 has a thickness of 150 ~um, the sheet thicknesses stated above being applicable in the case of a stand-up bag having a capacity of about 1 to 1.5 litres, or a maximum capacity of 2 litres.
Enclosed between sheet 8 acting as the outer skin and 35 sheet 10 acting as the inner skin is a thin aluminum sheet 10' acting as a barrier layer and having a thickness of between 8 ,um and 12 ~m, depending on the size of the 2~4~82 l stand-up bag. An aluminum layer of this kind is effective for instance to prevent the leakage of solvents through the walls of the bag or, in the case of migration-sensitive products, the infiltration of oxygen ~nto the bag and 5 thus into the product.
The stand-up bag has substantially cylindrical outer con-tours in its filled state thanks to the provision of a top wall element 11 of a shape corresponding to that of bottom wall element 5 and welded to upper portions of lO sidewalls 1. By contrast to weld seam 6 of bottom wall 5, the weld seam 12 of top wall element 11 extends along a circular-arcuate path with its open side facing downwards, i.e. it is formed as a mirror image of weld seam 6 of bottom wall 5. Bottom wall element 5 and top wall element 15 11 are each formed with a folding seam 13 extending between weld seams 3 of sidewalls 1 as illustrated in fig. 3.
The dispensing opening of the bag defined by dispenser spout 7 is located adjacent folding seam 13 of top wall 11.
Dispenser spout 7 has its base end provided with a flange 14 by means of which it is sealingly secured to the inner side of the inwards facing sheet 10. Dispenser spout 7 projects from sidewall 1 of the stand-up bag by about 15 mm to 20 mm and is closed by a closure cap 15 provided with screw threads 16. Closure cap 15 may be provided wlth a _ sealing gasket 17 inserted therein. As indicated in fig. 4, flange 14 has a width 18 of about 5 mm, and a thickness 19 of about 1.5 mm. The rim of flange 14 is spaced from top wall weld seam 12 by about 5 mm to 10 mm and located at a central position between weld seasm 3 of sidewalls 1 inter-connected at thelr longltudlnal marglns 2.
Sidewalls 1 are extended upwards beyond top wall 11, the thus extended portions of the sidewalls being of sufficient length for punchign grip openings 20 therein. In the folded 35state of the stand-up bag illustrated in fig. 3, the grip openings 20 in the two sidewalls 1 are superimposed at congruent positions, so that they can be formed in a single punching operation. By contrast to the grip openings 20 2~5~2 1 of the stand-up bag shown in fig. 3, in which embodiment the sheet portions separated by the slit-shaped openings are pushed aside when the stand-up bag is to be carried, the grip openings may also be provided in the shape of 5 horizontally extending elongate openings. The grip openings 20 are of an arcuate shape approximately corresponding to that of top wall weld seam 12. The upper portion of the stand-up bag between top wall weld seam 12 and the upper transverse margin 21 may likewise be formed as a twin-layer 10 sheet construction formed by the upper extensions of sidewalls 1 and upwards folded sections of the cutting used for forming top wall 11, resulting in a reinforced structure of the wall portions in which grip openings 20 are located. These reinforced upper wall portions may for 15 instance be provided with an additional perforation 22 permitting the stand-up bag to be suspended from a peg or the like.
Claims (19)
1. A stand-up bag made of a heat-sealable or weldable plastic sheet material and devised to contain liquid and/or pasty products, provided with a dispensing aperture and comprising two substantially rectangular sidewall-forming sheet elements sealed to one another along their longitud-inal edges, a foldable bottom element acting as a support bottom fitted between the lower transverse edges of the sidewalls so as to fold in therebetween, and a foldable sheet element acting as a top closure wall fitted between upper end portions of said sidewalls so as to fold in there-between, characterized in that said dispensing aperture is formed by a closeable dispensing spout (7) provided at an upper location of one of said sidewalls (1) at the level of said top closure wall element when folded in, said dispens-ing spout (7) extending through said sidewall (1) and hav-ing one of its ends provided with a flange (14) secured to said sidewall (1) in contact with the inner face thereof, the outwards facing end of said dispensing spout (7) being provided with external screw threads (16) having a closure cap (15) screwed thereonto.
2. A stand-up bag according to claim 1, characterized in that said flange (14) is sealed to said sidewall.
3. A stand-up bag according to claim 1 or 2, character-ized in that said flange (14) has a maximum thickness (19) of 2 mm.
4. A stand-up bag according to any of claims 1 to 3, characterized in that said flange (14) has a width (18) of between 4 mm and 8 mm.
5. A stand-up bag according to any of claims 1 to 4, characterized in that said dispensing spout (7) has its outer surface formed with radial projections or undercut portions having a closure cap clamped thereonto.
6. A stand-up bag according to any of claims 1 to 5, characterized in that said dispensing spout (7) is spaced about 10 mm from the upper sealing seam (12) formed between said sidewall (1) and said top closure element (11).
7. A stand-up bag according to any of claims 1 to 6, characterized in that said sidewalls (1) are extended beyond said top closure element (11), the thus extended portions having grip openings (20) formed therein.
8. A stand-up bag according to claim 7, characterized in that said grip openings are formed by punched slits.
9. A stand-up bag according to any of claims 1 to 8, characterized in that said plastic sheet material is a two-layer compound sheet material (8, 10).
10. A stand-up bag according to claim 9, characterized in that the sheet layer (10) facing towards the interior (9) is a polyethylene sheet.
11. A stand-up bag according to claim 9 or 10, charact-erized in that the outwards facing sheet layer (8) acting as the outer skin is a polyester sheet.
12. A stand-up bag according to claim 10, characterized in that said polyethylene sheet is a co-extrusion sheet.
13. A stand-up bag according to any of claims 9 to 12, characterized in that said outwards facing sheet (8) has a thickness of at least 10 µm.
14. A stand-up bag according to claim 13, characterized in that the thickness of said outwards facing sheet (8) is 12 µm.
15. A stand-up bag according to any of claims 9 to 14, characterized in that said inwards facing sheet (10) has a thickness of between 80 µm and 200 µm.
16. A stand-up bag according to claim 15, characterized in that the thickness of said inwards facing sheet (10) is 100 µm to 150 µm.
17. A stand-up bag according to any of claims 1 to 16, characterized in that said bottom element (5) and said top closure element (11) are each of approximately circular configuration and connected to said sidewalls (1) in such a manner that the filled bag has the shape of a cylinder.
18. A sheet material bag according to any of claims 10 17, characterized in that an aluminum sheet (10') is disposed between the layers of said compound sheet (9, 10).
19. A sheet material bag according to claim 18, characterized in that said aluminum sheet (10') has a thickness of between 8 µm and 12 µm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8900882U DE8900882U1 (en) | 1989-01-26 | 1989-01-26 | Stand-up pouch |
| DEG8900882.0U | 1989-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2044582A1 true CA2044582A1 (en) | 1990-07-27 |
Family
ID=6835433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2044582 Abandoned CA2044582A1 (en) | 1989-01-26 | 1990-01-25 | Stand-up bag |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP0380110A3 (en) |
| JP (1) | JPH04503044A (en) |
| CA (1) | CA2044582A1 (en) |
| DE (1) | DE8900882U1 (en) |
| WO (1) | WO1990008702A2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT1181216E (en) | 1999-03-29 | 2003-10-31 | Amcor Flexibles Europe As | PE STACKING BAG |
| ES2194712T3 (en) * | 1999-03-29 | 2003-12-01 | Amcor Flexibles Europe As | BAG HOLDED ON FOOT FOR PRODUCTS THAT CAN FLOW OR THAT CAN BE VERTERED. |
| AU4639299A (en) * | 1999-06-30 | 2001-01-22 | Derek Martin Fay | Tissue dispenser container |
| AU2002257366A1 (en) * | 2001-05-04 | 2002-11-18 | Kohler Packaging Limited, Kohler Flexible Packaging Cape Division | Flexible package |
| CA2582060C (en) | 2004-10-22 | 2010-09-21 | Tama Plastic Industry | Netting material with breathable material panels and method of wrapping with netting material |
| EP1963199A1 (en) * | 2005-12-21 | 2008-09-03 | Columbus E. APS | Disposable beverage can |
| ES2671889T3 (en) | 2012-12-27 | 2018-06-11 | Genesistec Ltd. | Container |
| JP2016055916A (en) * | 2014-09-12 | 2016-04-21 | 凸版印刷株式会社 | Packaging bag |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2378503A (en) * | 1942-12-07 | 1945-06-19 | Howard A Rohdin | Sewed double side seam bag |
| US2981443A (en) * | 1956-09-04 | 1961-04-25 | Line Dispensers Inc B | Container and spout therefor |
| FR1482296A (en) * | 1966-05-23 | 1967-05-26 | Inland Container Corp | Thermoplastic liner bag for packing boxes |
| DE1786019A1 (en) * | 1968-08-06 | 1971-11-11 | Spiess C F & Sohn | Process for the production of a bag, especially a stand-up bag made of thermoplastic material |
| DE2946052A1 (en) * | 1979-11-15 | 1981-06-11 | Hoechst Ag, 6000 Frankfurt | Prodn. of foil bag with three layer laminate structure - closed by exposing polyethylene layer and press welding |
| US4362255A (en) * | 1980-10-24 | 1982-12-07 | Liqui-Box Corporation | Barrier spout and cap for flexible bags or pouches |
| DE3218415A1 (en) * | 1982-05-15 | 1983-11-24 | Karl-Heinz Dr. 4802 Halle Sengewald | BAG FOR INFUSION SOLUTIONS OR THE LIKE |
| DE8608435U1 (en) * | 1986-03-27 | 1986-06-12 | Deutsche Sisi-Werke Gmbh, 6901 Eppelheim | Beverage containers made from flexible composite material |
| DE8908015U1 (en) * | 1989-06-30 | 1989-08-10 | Hoechst Ag, 6230 Frankfurt | Stable bag |
-
1989
- 1989-01-26 DE DE8900882U patent/DE8900882U1/en not_active Expired
-
1990
- 1990-01-25 JP JP50331390A patent/JPH04503044A/en active Pending
- 1990-01-25 EP EP19900101522 patent/EP0380110A3/en not_active Withdrawn
- 1990-01-25 CA CA 2044582 patent/CA2044582A1/en not_active Abandoned
- 1990-01-25 EP EP19900903163 patent/EP0455728A1/en active Pending
- 1990-01-25 WO PCT/EP1990/000138 patent/WO1990008702A2/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0455728A1 (en) | 1991-11-13 |
| DE8900882U1 (en) | 1989-03-23 |
| WO1990008702A3 (en) | 1990-10-18 |
| EP0380110A2 (en) | 1990-08-01 |
| WO1990008702A2 (en) | 1990-08-09 |
| EP0380110A3 (en) | 1990-11-22 |
| JPH04503044A (en) | 1992-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |