CA2045555A1 - Stand-up bag - Google Patents
Stand-up bagInfo
- Publication number
- CA2045555A1 CA2045555A1 CA002045555A CA2045555A CA2045555A1 CA 2045555 A1 CA2045555 A1 CA 2045555A1 CA 002045555 A CA002045555 A CA 002045555A CA 2045555 A CA2045555 A CA 2045555A CA 2045555 A1 CA2045555 A1 CA 2045555A1
- Authority
- CA
- Canada
- Prior art keywords
- stand
- bag
- bag according
- sheet
- hose
- 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
- B65D75/5883—Non-integral spouts connected to the package at the sealed junction of two package walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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"
-
- 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
-
- 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
- B65D2231/00—Means for facilitating the complete expelling of the contents
- B65D2231/001—Means for facilitating the complete expelling of the contents the container being a bag
- B65D2231/004—Means for facilitating the complete expelling of the contents the container being a bag comprising rods or tubes provided with radial openings, ribs or the like, e.g. dip-tubes, spiral rods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Saccharide Compounds (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Medicines Containing Plant Substances (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Tubes (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. In order to permit the contents of the bag to be dispensed in metered amounts and to be evenly spread on a surface by a simple handling of the stand-up bag, a first solution according to the invention provides the use of a dispensing member in the form of a sheet strip disposed between the upper transverse margins of the bag, another solution provides the employ of a dispensing member in the form of a flexible and closeable hose, and still another solution provides the use of a dispenser nozzle member having an applicator edge.
Description
2 ~
1 Stand-~p Bag Description 5 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, comprising two substantially rectangular sidewall-forming sheet elements sealed to one another along their longitudinal margins, a foldable bottom wall element acting as a stand-up support bottom and adapted to lie between said sidewalls being interposed between the lower transverse margins of the sidewalls, and a dispensing portion adjacent the upper transverse margins.
15 Stand-up bags made of plastic sheet material are specific-ally known for use as disposable beverage packages.
Packages of this type usually terminate in a pointed end and have a filling volume of o.2 litres. The sheet material employed for these beverage packages is pro~ided with a 20 thin aluminum sheet layerservingamongst other purposes to stabilize the package. The bottom side is provided with a support bottom surface permitting the bag to be placed on a support after having been opened, without the danger of the bag's contents spilling from the dispensing opening or 25 f the bag toppling over. In beverage packages of this kind the dispensing opening may for instance be determined by a pierceable weakened portion capable of being pierced by a drinking straw terminating in a pointed end.
Aside from beverages, sheet bags are also used for filling 30 them with other liquid or pasty products, for instance liquid detergents. Sheet bags of this type are especially used as refill packages.
In order to impart increased stability to such stand-up bags comprising a lower bottom wall interposed between the sidewalls, and preferably composed of two wall elements welded to one another, an additional top wall element is included with a structure similar to that of the bottom wall.
1 The basic advantage of such plastic sheet bags can be seen in the fact that they can be folded extremely flat in their empty state so as to require very little storage space.
Particularly stand-up bags of a greater volume, for instance 5 a volume of up to two litres, are practically never used for containing products to be dispensed in individual metered portions, because after the bag has been opened, as by cutting off an upper corner portion, it is not ensured that the bag retains sufficient stability to remain standing 10 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 has sufficient stability for it to remain standing even after its contents have been partially dispensed, 15 which requires little storage space in its empty state, and which permits its contents to be dispensed in metered amounts and to be uniformly spread on a surface by a simple handling of the container, i.e. the bag.
20 According to the invention, this object is attained by the provision that the dispensing portion is a sheet member connected to the upper transverse margins and having a closed dispensing outlet defined by its end portion, with a restricted cross-section as compared to that of the bag, 5 the dispensing portion being closed adjacent the closed dispensing outlet by a sheet strip inserted into the dispensing portion so as to obturate the cross-sectional area of the dispensing outlet, and provided with at least one passage opening. The sheet strip inserted into the dispensing opening and provided with one or more passage openings is designed to form an applicator head permitting the bag's contents, for instance glue, to be dispensed in metered amounts. The sheet strip is inserted into the dispensing portion of the bag in such a manner that it forms the upper end of the bag after the closed end of the dispensing portion, which may for instance be sealed, has been opened, for instance by cutting it of`f by means of a pair of scissors or a knife. The sheet strip may also be r~
1 provided with a narrow slit rather than with a plurality of separate passage openings. For dispensing its contents, the bag is held with its stand-up support bottom facing upwards and the dispensing portion pointing downwards, and 5 a slight pressure is exerted on the sidewalls of the bag.
This causes the contents to be dispensed from the bag in a uniform flo~l and permits them to be evenly spread on a surface by means of the sheet strip. After use the stand-up bag can again be stood on its stand-up support bottom 10 without subsequently collapsing, since the support bottom and the sidewalls sealed to one another impart sufficient stability to the bag. A particular advantage of a bag of this type is the low weight of the package. An additional advantage results from the fact that the unfilled bag can be folded without the thickness of the respective portion Or the folded bag being substantially increased by the applicator ehad formed by the sheet strip. This stand-up bag including its dispensing ~ortion can be economically produced, since all of its components can be made of a 20 heat-sealable or weldable plastic sheet material.
In order to permit the sheet strip on the one hand to lie snugly between the sidewalls of the collapsed and folded bag, and on the other hand, to allow the dispensing portion to expand adjacent the dispensing opening in the filled 25 state of the bag, the sheet strip is provided with at least one folding seam or folding line extending between the sealed longitudinal margins of the sidewalls or of the dispensing portion, respectively. As a result the sheet strip is divided into two flat portions, the width of 30 these two flat surface portions being preferably the same.
The sheet strip is preferably provided with several passage openings aligned in a row, which in the case of a sheet strip having a folding seam or folding line should prefcr-ably extend along this seam or line, since the edge defined 35 thereby forms the foremost projecting portion of the assembly. In order to permit the bag's contents to be even more effectively spread on a surface, the sheet strip may be provided with two folding lines defining a flat surface 1 therebetween, in which case the passage openings should preferably be located on or in this flat surface.
In order to permit the sheet strip to be sealed to the inner faces of the sidewalls of the stand-up bag, it is 5 advantageously provided with two margin strip portions acting as respective sealing surfaces. These margin strip portions are preferably used for sealing or welding the sheet strip to the components of the stand-up bag before the sidewalls are sealed to one another.
The passage openings may have a circular or an elongate, slit-shaped cross-sectional configuration. The free crcss-sectional size of each passage opening should be about o.5 mm to 2 mm.
15 Since a sheet strip of the type described above has only two of its sides sealingly connected to the inner faces of the stand-up bag, and is merely in loose abutment with the sidewalls adjacent the location of their sealing seams, the sealing action should be improved by providing the ends of 20 the sheet strip with flaps extending transversely of the folding seam or folding lines on both sides thereof and adapted to lie in contact with the sidewalls to thereby effectively seal the interior of the bag at these locations.
In order to make these flaps more flexible, they are divided 2sin continuation of the respective fo~ding seam or lines, so that the thus divided portions of the flap can overlie one another.
In the closed state, i.e. in the se~led state of the stand-up bag the sheet strip may be directed towards the 30 bottom wall as viewed from the dispensing opening. This offers the advantage that the sheet strip can snap or be flexed outwards so as to project a substantial distance over the walls of the bag after the sealed dispensing opening of the stand-up bag has been opened.
The stand-up bag including the sheet strip is made of pre-cut heat-sealable sheet elements, preferably of a twin-layer compound-sheet material.
1 The stated object of the invention may also be attained by the provision that the dispensing portion is a flexible and closeable hose. This hose permits the bag's contents, for instance a glue or a self-curing foam, to be deposited at 5 awkwardly accessible locations and to be evenly metered and spread at these locations. The hose may be connected only to the upper end of the bag, cr extend down to its bottom.
In both cases the bag's contents can be dispensed by exert-ing a slight pressure on the sidewalls. In the case of a 10 hose extending down to the bottom, the bag can remain in its upright position during the dispensing operation, while the dispensing of the bag's contents through a hos~
connected only to the end of the bag requires the bag to be held with its support bottom facing upwards and the 15 hose pointing downwards. After part of the contents has been dispensed from the bag, the ba~ can again be stood on its support bottom without the danger of collapsing, since the support bottom and the sidewalls sealed to one another impart sufficient stability to the bag. A particular 20 advantage of a bag of this type is its low empty weight.
In addition, the bag can be folded very flat or thin in its emp~y or unfilled state.
The hose is preferably provided in the form of a polyethylene hose or a propylene hose, as the case might be. Hoses of 25 these materials can be readily welded to the inwards facing layer of the bag's wall consisting of a polyethylene s~eet layer. A hose made of a plastic material can be sealingly welced into the end of the bag, resulting in a continuous hermetically sealed volume between the support bottom and 30 the inserted hcse. The hose is preferably connected to a conically convergent extension formed of respective upper extensions of the plastic sheet sidewalls, so that even the last remainders of the bag's contents can flow into the hose as the bag is emptied. In order to obtain a sealing 35 surface area of the greatest possible size, the end portion of the conically cGnvergent extension should have a constant cross-section corresponding to the outer cross-sectional dimension of the hose.
1 Il order to permit different types of hoses to be connected to the dispensing opening of a stand-up bag of a given size, i.e. a bag of predetermined dimensions, it is possible to employ an adapter member made for instance of polyethylene 5 and inserted into the conical extension so that the hose can be plugged thereonto. In an advantageous embodiment such an adapter member should have its er.d facing towards the bag, i.e. the end to be sealed or welded into the conical extension, provided with an oval connecting cone 10 aligned with its longer axis in the direction of the two weld seams cf the sidewalls. An oval connection cone of this kind may terminate in pointed or wedge-shaped ends adjacent the weld seams, so that it fits between the sealed or welded sidewalls without excessively expanding them.
15 The closure of the hose may be formed by a plug inserted into the end of the hose. Another advantageous possibility for closing the hose may be achieved by a clamp which is clamped onto the hose. To this purpose the hose may be folded back on itself, and the clamp can be clamped onto 20 the hose adjacent the location of the fold. In an embodi-ment cf this kind the hose is preferably provided with a pre-established fold-back portion which may be defined by a wall portion of reduced thickness. This pre-established fold-back portion should be positioned closely adjacent 25 the end of the hose facing towards the bag.
Depending on the product the bag is intended to contain, it may be advantageous to employ a hose extending through the wall of the bag tc a location adjacent the bottom wall.
This configuration perrnits the contents of the bag to be dispensed therefrom by exerting pressure on the sidewalls even after the contents have been reduced to a small amount collecting in the bcttom portion of the bag.
According to still another aspect of the irvention, the 35 stated object may be attained by the provision that t~e dispensing opening is formed by a nozzle member incorpor-ated in the bag and provided with an applicator edge formed with at least one cutlet port the cross-sectional area at the exit end of which is small as compared to the free 1 interior cross-sectional area of the nozzle member adjacent its inlet end connected to the sheet material, the outlet port being closed by a closure cap. This nozzle member acts as an applicator head permitting the bag's contents, 5 for instance glue, to be dispensed through its outlet port(s) by holding the stand-up bag wi.th its support bottom facing upwards and the nozzle member pointing downwards and exerting a slight pressure on the sidewalls of the bag.
This causes the contents to be disp~rsed through the 10 outlet port(s) in a uniform flow which may then be e~enly spread on a surface by means of the applicator edge. It is also possible to provide a narrow slot rather than a plurality of separate outlet ports. After a given surface area has been evenly coated with the contents of the bag by 15 the use~of the applicator edge, the bag is stood on its support bottom without collapsing, since the support bottom and the sidewalls sealed to one ancther impart sufficient stability to the bag. A particular advantage of a bag of this kind is its low empty weight.
20 The nozzle member is preferably provided with a dispersion space from which the individual outlet Forts extend, so that the bag's cont~nts are uniformly distributed over the separate outlet ports. For obtaining a uniform flat surface coating the outlet ports should preferably be aligned in a 25 row at regular sp~cings, and should additionally be of the same diameter. The applicat~r edge used for spreading the bag's contents dispensed through the outlet ports may form a boundary of a flat surface acting as a spreader surface for facilitating the coating of a surface with the bag's 30 contents, for instance a viscuous glue.
For facilitating the hermetically sealing insertion of the nozzle member, the inlet end portion thereof connectea to the sheet material is provided with a connecting cone having a cross-sectional shape defined by oval outer contours which may converge into pointed or wedge-shaped ends in the direction of the longer axis, this axis being aligned between the two weld seams of the sidewalls. A connecting ,, , 2 ~ 3 ei 1 cone of this configuration fits snugly in a corres~onding opening of the bag without subjecting the sealed seams of the sidewalls to excessive stress by excessive expansion of the respective sidewall portions, so that the otherwise 5 existing danger of leakage at these location is avoided.
If the outlet ports provided in the nozzle member have an elongate cross-sectional shape in the form for instance of slcts, these slots should be aligned parallel to one another.
The preferrec' free cross-sectional area of the outlet ports 10 lies between o.5 mm and 2 mm. In addition, the outlet ports shoulc' have an exit end portion ha~ing a length of 2 mm to 5 mm with a constant cross-section~ to result in that, particularly in the case of the bag'~ contents being a pasty composition, the mass is dispensed in the form of a 15 thin extrusion having a constant cross-section.
A blade-shaped extension may be connected to the applicator edge in such a manner that the bag " contents dispensed through the outlet ports flows onto this blade, which r,lay 20 then be used for spreading the product. The blade-shaped extension may be flexible and provided with suitably shaped teeth at its end or with grooves extending over the blade surface, as may be required by the intended use.
The nozzle member is preferab'y connected to a conically 25 convergent extension formed of a sheet material as an upper extension of the sidewalls, so that even small remainders of the bag's contents can be dispensed through the outlet ports of the nozzle member or applicator head by exerting a slight pressure on the sidewalls. Fc: permitting a 30 connecting plug extending from the nozzle member to be secilingly connected to the plastic sheet walls of the stand-up bag oYer a greater length, the upper portion of the ~ag to which the nozzle member is secured should preferably have a constant cross-section.
35 For preventing the outlet ports from getting clc,gged after repeated use of the bag, the closure cap may be provided with pins arranged in a comb-like configuration so as to be insertable into the outlet ports. When the closure cap is ~ J~3 1 replaced on the dispenser nozzle member after each use of the bag, the pins are pushed through the outlet ports so as to ensure the free passage therethrough of the bag's contents when the closure cap is again removed the next 5 time the bag is to be used. When the closure cap is designed for being clamped onto the nozzle member of the bag, the comb-like pins can be non-rotatably connected to the closure cap. In this embodiment th~ closure cap and the nozzle member are preferably provided with inner and outer 10 guide surfaces, respectively, in the shape for instance of a cone, acting to align the pins in the direction of the outlet ports when the closure cap is placed onto the nozzle member. When the closure cap is designed to be threaded onto outer screw threads of the nozzle member, the comb-like 15 pins have to be disposed on a support element losely in-serted in the closure cap, so that the closure cap is permitted to be rotated relative to the pin as it is being threaded onto the nozzle member. It has been found advant-ageous to form the pins of a flexible material permitting 20 them to be yieldingly inserted into the outlet ports.
All of the solutions indicated above are characterized in that the stand-up bag is made of prefabricated heat-seal-able flat sheet elements, preferably a twin-layer compound sheet material. Excellent performance is achieved when the 25 layer facing towards the interior is a polyethylene sheet, and the outer skin is formed by a polyester sheet. The employ of a pc1yethylene sheet in the form of a ccextrusion sheet - i.e. a multiple-layer sheet material - offers the advantage that the sheet acting as the inner wall of the 30 stand-up bag c2n be adapted to specific requirements in accordance with the intended use of the stand-up bag. The side of the sheet material on which the sealing operation is to be carried out may thus be designed to ensure part-icularly effective sealing properties; in addition, the 35 composition of a coextrusion sheet of this kind can be selected so as to result in increased stiffness. The thick-ness of the outwards directed polyester sheet is at least 10 ,um, preferably 12 ,um, while the inwards facing polyethylene 2 ~ 3 ~
1 sheet or coextrusion sheet should have a thickness of 80 ~m to 200 ~m, preferably a thickness of 100 ym to 150 ~m. In order to permit the stand-up bag to be also filled with solvent-containing or migration-sensitive products, a thin 5 aluminum sheet acting as a barrier layer may be enclosed between the several sheet layers~ preferably adjacent the inwards facing sheet layer. This aluminum sheet should have a thickness of between 8 ,um and 15 jum, depending on the size of the stand-up bag, and is effective for instance lO to p~event leakage of a solvent through the walls of the bag or, in the case of migration-sensitive products, the infiltration of oxygen into the bag and thus into the product.
In order to impart optimum stability or standing ability to 15 the bag, it is advantageously designed so as to assume a substantially cylindrical shape adjacent its bottom portion in the filled state of the bag. For obtaining this cGnfig-uration, the two sidewalls are designed as rectangular elements and sealed or welded to one another along their 20 longitudinal margins. The bottom wall element is made of a substantially circular cutting in this case, and welded to the sidewalls alcng a semicircular sealing or weld seam in the collapsed state of the bag. As an alternative to the rectangular shape, the sidewalls may conically converge 25 tcwards their upper end, so that the filled stand-up bag is of substantially frusto-conical shape.
The applicator nozzle member including its flange may be made of polyethylene or polypropylene, i.e. of a material which can be readily processed and effectively welded to an inwards facing layer of the bag in the form of a polyethylene sheet.
Embodiments of the invention shall now be described in more detail by way of example with reference to the accompanying 35c'rawings, wherein:
fig. 1 shows a perspective view of a filled stand-up bag, fig. 2 shows a longitudinal sectional view of the stand-up ;.
l bag of fig. 1, fig. 3 shows a pre-cut sheet blank of a sheet strip to be inserted into the dispensing opening, 5 figs. 4 and 5 show other embodiments of sheet strips, fig. 6 shows a sectional view of the plastic sheet material used for making the stand-up bag, fig. 7 shows a perspective view of a filled stand-up bag according to another embodiment, fig. 8 shows a sectional view of the plastic sheet material used for making the stand-up bag, fig. 9 shows a longitudinal sectional view of the stand-up bag of fig. 7 with a reduced diameter of the bag, 5 fig.10 shows an enlarged illustration of a hcse sealingly welded into the stand-up bag of fig. 7, fig.11 shows a hose secured to the bag with the aid of an adapter member, 20 fig.12 shows a perspective view of a filled stand-up bag according to still another embodiment, fig.13 shows the stand-up bag of fig. 12 in its empty and folded state, fig.14 shows a longitudinally sectioned view of the stand-up bag taken along the line III~III in fig. 13, fig.15 shows a sectional view of the applicator nozzle member taken along the line IV-IV in fig. 14, fig.16 shows another embodiment of an applicator nozzle, and fig.17 shows a sectional view of the plastic sheet material used for making the stand-up bag.
A stand-up bag illustrated in figs. 1 and 2 hzs two side-walls 1 heat-sealed or welded to one another along their 35 vertically extending longitudinal margins 2 by the form-ation of respective sealing or weld seams 3. Inserted alcng the lower transverse margins 4 is a lower bottom wall elem-ent 5 acting as a support bottom and made of a circular or 1 elliptical cutting as apparent from the bottom weld seam 6 depicted in fig. 1. Bottom wall element 5 and sidewalls 1 are surface-welded or sealed to one another over the entire area between lower transverse margin 4 and bottom 5 weld seam 6, to result in a two-layer plastic sheet struct-ure acting to reinforce the lower portion of the bag's wall.
Ir. the filled state of the bag bottom wall 5 assumes a slightly sagging configuration at least at its center portion as indicated by a broken line 7 in fig. 2. The lO thus sagging bottom wall 5 cooperates with the reinforced lower transverse margins 4 to _mpart excellent standing ability to the stand-up bag.
All of the cuttings or blanks ~of which the stand-up bag is l5 composed cc,nsist of a twin-layer plastic sheet material of the type shown in cross-section in fig. 5. The outwards facing sheet 8 acting as the outer skin is a polyester sheet having a thickness of 12 ~m, while the sheet 10 facing inwards to the interior 9 of the stand-up bag and 0 acting as the inner skin is a polyethylene sheet formed as a coextrusion sheet material. Such a coextrusion sheet material is composed of several layers. This layered struct-ure may be suitably varied at the time of the coextrusion process for adapting it to any specific requirements.
Sheet 10 has a thicknecs of 150 ~um, the above indicated thicknesses cf the sheet materials being applicable for a stand-up bag having a capacity of about 1 to 1.5 litres, or no more than 2 litres. Enclosed between sheet 8 acting as the outer skin and 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 ~m and 15 ~m, depending on the size of the stand-up bag. An aluminum layer of this kind is effective for instance to prevent leakage of a solvent through the walls of the ba~ or, in the case of migration-sensitive products, the infiltration of oxygen into the bag and thus into the product.
The stand-up bag has substantially cylindrical outer con-tours. The upper portions of sidewalls 1 are continuously 2 ~
l extended to fcr~ a conical extension 11 of the bag, the end of extension 11 being formed as a dispensing cpening having a sheet strip 12 inserted therein.
As illustrated in flg. 3, sheet strip 12 consists of a 5 rectangular sheet element having a central folding seam 13 and two outer folding seams 14 defining respective margin portions 15. These margin portions 15 are used for sealing or welding sheet strip 12 into the upper end of conical extension 11 of the stand-up bag as shown in fig. 2. In the lO empty and closed state of the stand-up ~ag sheet strip 12 may by folded downwards to assume the position indicated by a broken line. The upper end of the filled and not yet used stand-up bag is sealed by a closure seam 1~ as ~chown in fig. 1. For opening the stand-up bag closure seam 16 is 15 cut off to thereby expose the dispensing opening. The stand up bag may then be held with its bottom wall 5 facing up-wards and its conical extension 1i pointing downwards, so that the pressure of the bag's contents acting on sheet strip 12 from inside causes siheet ctrip to snap outwards 20 to the position shown in fig. 2, wh~reupon the contents can be dispensed through passage openings 17 formed in sheet strip 12. Passage openings 17 may for instance be designed in the form of slits as shown in fig 3, or in the form of perforations as indicated in figs. 4 and 5.
25 Passage openings in the form of slits 17 should be disposed parallel to one another at the location of central fo~ding seam 13 as ill~strated in fig. 3. Sheet strip 12 may also be folded along several folding lines as indicated at 18 in fig. 3, resulting in the formation of a planar surface 30 19 containing passage openings 17. This surface may be used as an applicator surface for evenly spreading the bag's contents on a surface after it has been dispensed through passage openings 17.
The sheet strip 12 illustrated in fig. 4 likewise has a central folding seam 13 with passage openings 17, and the two margin portions 15 for sealing or welding sheet strip 12 to the inner faces of saidewalls 1 of conical extension 1 11. Connected to the longitudinal ends Or sheet strip 12 extending transversely of folding lines 13, 14 are respective flaps 20 formed as extensions of the central flat strip portions and folded downwards about respective folding 5 lines to point in the direction towards the interior 9 of the bag. Flaps 20 intimately contact sidewalls 1, so that also these portions of the dispensing opening are hermet-ically closed by sheet strip 12. The pressure of the bag's contents being discharged forces flaps 20 into engagement lO wit~l the interior wall surfaces.
Fig. 5 shows a sheet strip 12 similar to the one depicted in fig. 4, although without flaps at its ends. The sheet strips 12 shown in figs. 4 and 5 are particularly suitable for use in conical extensions 11 terminating in an end also 15 of conical shape. To this purpose central folding deam 13 is of a shorter length than the lateral folding lines 14 defining the margin portions 15.
Another embodiment of the invention shall now be described with reference to figs. 7 to 11. As particularly shown in figs. 7 and 9, a stand-up bag has two sidewalls 21 sealed or welded to one another along their vertically extending longitudinal margins 22 by the formation of respective sealing or weld seams 23. Inserted along the lower trans-5 verse margins 24 is a bottom wall element 25 acting as asupport bottom and formed by a circular or elliptical cutting as clearly apparent from the bottom weld seam 26 in fig. 1. Bottom wall element 25 and sidewalls 21 are surface-welded or sealed to one another over the entire area between lower transverse margin 24 and bottom weld seam 26, so that the thus obtained two-layer plastic sheet structure acts as a reinforced wall of the lower portion of the bag.
In the filled state of the bag bottom wall 25 as~umes a 35 somewhat sagging shape, at least at its central portion, as indicated in fig. 9 by the broken line 27. The thus sagging bottom wall 25 cooperates with the reinforced lower transverse rnargins 24 to impart excellent ctanding ability r3 l to the stand-up bag.
All of the pre-cut blanks of which the stand-up bag is composed consist of a twin-layer plastic sheet material as shown in cross-section ir fig. 8. The outwards facing 5 layer acting as the outer skin is a polyester sheet 28 having a thickness of 12 ym, while the layer 210 facing inwards towards the interior 29 of the stand-up bag and acting as the inner skin is a polyethylene sheet formed as a coextrusion sheet. Such a coextrusion sheet material is 10 composed of several layers resulting in a layered structure which may be varied at the time of the extrusion process for adapting it to any specific requirements. Sheet 210 has a thickness of 150 lum, the indicated sheet thicknesses being applicable in the case of a stand-up bag having a 15 capacity of about 1 to 1.5 litres, or no more than 2 litres.
Enclosed between sheet 28 acting as the outer skin and sheet 210 acting as the inner skin is a thin alumin~m sheet 210' acting as a barrier layer and having a thickness of between 8 ym and 15 ~um, depending on the size of the 20 stand-up bag. An aluminium 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 into the bag and thus into the product.
The stand-up bag has substantially cylindrical outer con-tours. The upper portions of sidewalls 21 are integrally extended to form a conical extension 211 defining a dispens-ing opening at its end, the said end of extension 211 hav-ing a hose 212 made of a plastic material sealingly in-serted therein~ ~ose 212 may have any suitable length, depending on the intended use of the stand-up bag. The flexibility of hose 212 permits it to be positioned at not readily accessible locations for thereat spreading the bag's contents. The end of hose 212 may be closed by a plug 213 as illustrated in fig. 7. Another possibility of closing hose 212 consists in that the hose is folded back upon itself at a pre-established folding location 21LI which l may be defined by a wall portion of reduced thickness of hose 212, the rearwards folded end portion 215 of the hose being clamped to hcse 212 by a clamp 216 as shown in fig.9.
The hose shown in fig. 9 extends right through the interior 5 29 of the stand-up bag to a location adjacent bottom wall 25, to thereby permit remainders of the bag's contents collecting adjacent the bottom portion to be dispensed.
Fig. 10 shows the upper end portion of conical extension 10 211. This upper end portion i defined by parallel walls, so that hose 212 can be sealed into this end portion in surface contact therewith over an extended area. By contrast to the embodiment according to f'ig. 9, the hose 212 shown in fig. 10 terminates within extension 211 at a location 15 indicated by a broken line 217 in fig. 9. Fig. 11 shows the conical extension 211 to which hose 212 is connected by an adapter member 218 interposed therebetween. Adapter member 218 may be provided with a connecting cone 219 of oval cross-sectional shape, ~;ith the long axis of the oval cross-section extending in the direction of weld seams 23, so that the adapter member 218 fits snugly into the connect-ion betw~een weld seams 23 and sidewalls 21; as a result, the weld seams 23 are not subjected to excessive stress by being unnecessarily expanded adjacent these locations. The portion of adapter member 218 to which hose 212 is connected projects outwards from adapter member 219 and may be of any suitable thickness, permitting hoses 212 of different diameters to be connected to the stand-up bag.
Adapter member 218 is preferably made of polyethylene.
30 A still further embodiment of the invention shall now be discussed with reference to figs. 12 to 17. As particul-arly shown in figs. 12, 13 and 14, the illustrated stand-up bag has two sidewalls 31 sealed or welded to one another along their vertically extending longitudinal margins 32 35 by the formation of respective sealing or weld seams 33.
Inserted along the lower transverse margins 34 is a lower bottom wall element 35 acting as a support bottom and formed as a circular or eliiptical cutting as clearly apparent ~ 3 1 from the bottom weld seam 36 shown in fig. 13. Bottom wall element 35 and sidewalls 31 are surface-welded or sealed to each other over the entire area between lower transverse margins 34 and bottom weld seam 6, so that the thus obtained 5 two-layer plastic sheet structure acts as a reinforced wall of this lower portion of the bag.
In the filled state of the stand-up bag,bottom wall element 35 assumes a slightly sagging shape, at least at its central portion, as indicated by the broken line 37 in 10 fig. 14. The sagg~ng bottom wall 35 cooperates with the reinforced lower transverse margins 34 to result in an excellent stability of the stand-up bag in its standing position.
5 All of the pre-cut elements of which the stand-up bag is composed consist of a twin-layer plastic sheet material as shown in cross-section in fig. 16. The outwards facing layer 38 acting as the outer skin is a polyester sheet having a thickness of 12 ~m, while the layer 310 facing inwards towards the interior 39 of the stand-up bag and acting as the inner skin is a polyester sheet formed as a coextrusion sheet material. Such a coextrusion sheet material is composed of several layers resulting in a layered structure which may be varied at the time of the extrusion process for adaptation to any specific require-ments. Sheet 310 has a thickn~ss of 150 ~um, the indicated sheet thicknesses being applicable in the case of a stand-up bag having a capacity of about 1 to 1.5 litres, or no more than 2 litres. Interposed between sheet 38 acting as the outer skin and sheet 310 acting as the inner skin is a thin aluminu~ sheet 310' acting as a barrier layer and ha~ing a thickness of between 8 jum and 15 ~m, depending on the size of the stand-up bag. An aluminum layer of this kind is effective for instance to prevent the leakage of a solvent through the walls of the bag or, in the case of a migration-sensitive product, the infiltration of oxygen into the bag and thus into the product.
The stand-up bag has substantially cylindrical outer contours.
2'~
1 The upper portions of sidewalls 31 are integrally extended to form a conical extension 311, the end of which defines a dispensing opening having an applicator nozzle member 312 sealingly inserted therein. As shown in figs. 13 and 14, 5 nozzle member 312 is provided with a connecting cone 313 having an oval or elliptical cross-section and being sealingly inserted into conical extension 311, the end portion of which has a constant interior cross-section.
The long axis of the oval cross-section of connecting cone 10 313 is aligned in the direction between the two weld seams 33 connecting the longitudinal margins 32 of sidewalls 31 to one another. At the juncture of the two sidewalls 31, connecting cone terminates in a pointed or wedge-shaped end so as to conform to the shape of sidewalls 31 at this 15 location. As a result, sidewalls 31 are not subjected to excessive stress at the location Or the seams. As shown in fig. 15, applicator nozzle member 312 can be closed by a closure cap 315 having inner screw threads 316 for thread-ing it onto outer screw threads 317 on applicator nozzle 20 member 312. The end of applicator nozzle member 312 is formed with a flat surface 318 including the openings of five outlet ports 319 each having a cross-section of about 1 mm. The flat surface 318 is defined by two applicator edges 320 forming a transition to respective tapered 25 surfaces 321. Apart from these tapered surfaces 321, applicator nozzle member 312 has a circular cross-section.
Both the applicator edges 320 and flat surface 318 as well as tapered surfaces 321 serve to apply the bag's contents dispensed through outlet ports 319 to a surface and to 30 evenly spread it thereon. For this applying operation the stand-up bag is held with applicator nozzle 312 pointing downwards, so that its contents are dispensed through out-let ports 319, aided, if need be, by the exertion of a slight pressure on sidewalls 31. The construction of the 35bag with its lower bottom wall element 35 acting as a support bottom and the weld seams 33 sealingly interconnect-ing its sidewalls 31 ensures sufficient stability of thebag even after its contents have been partially dispensed, l thus enabling it to stand upright on its support bottom even when partially empty. Inserted into closure cap 315 is an insert member 322 provided with pins 323 in an arrangement corresponding to that of outlet ports 319 on 5 nozzle member 312, so that they are pushed into outlet ports 319 when applicator nozzle 312 is closed after use.
By this provision it is ensured that the outlet ports remain open even after repeated use, and are not clogged by the bag's contents. This insert member 322 is supported 10 on the interior wall surface of closure cap 315 and is not entrained to rotate in unison therewith when applic-ator nozzle 312 is opened or closed. In a modified embodi-ment of closure cap 315, in which it is merely clamped onto applicator nozzle 312 and therefore not provided with 1~ screw threads, insert member 322 may be integrally and non-rotatably connected with closure cap 315.
As viewed from the side of their exit ends, outlet ports 319 extend parallel to each other over a length of 5 mm with a constant cross-section. Provided between outlet 20 ports 319 and connecting cone 313 is a dispersion space 325 effective to ensure that the bag's contents are evenly distributet between the separate outlet ports 319. The outlet ports 319 may be formed in an insert member diagram-matically indicated at 326. It is thus possible to adapt 25 applicator nozzle 312 to different requirements by the insertion thereinto of insert members having different arrangements of outlet ports 319. By contrast to the applicator nozzle shown in fig. 15, the applicator nozzle of fig. 16 has seven outlet ports 319 and is provided with 30 a blade-shaped extension 327 extending from one side of the flat surface 318 including the openings of outlet ports 319.
Otherwise the construction of the applicator nozzle 312 of fig~ 16 is similar to that of the embodiment shown in fig. 15, there being likewise provided a closure cap to be clamped 35 onto the nozæle for closing it. The blade-shaped extension 327 is preferably formed of a flexible material and provided with grooves 328 extending in the direction of the axes of outlet ports 319 and useful for spreading the bag's contents dispensed through outlet ports 319 on a surface.
1 Stand-~p Bag Description 5 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, comprising two substantially rectangular sidewall-forming sheet elements sealed to one another along their longitudinal margins, a foldable bottom wall element acting as a stand-up support bottom and adapted to lie between said sidewalls being interposed between the lower transverse margins of the sidewalls, and a dispensing portion adjacent the upper transverse margins.
15 Stand-up bags made of plastic sheet material are specific-ally known for use as disposable beverage packages.
Packages of this type usually terminate in a pointed end and have a filling volume of o.2 litres. The sheet material employed for these beverage packages is pro~ided with a 20 thin aluminum sheet layerservingamongst other purposes to stabilize the package. The bottom side is provided with a support bottom surface permitting the bag to be placed on a support after having been opened, without the danger of the bag's contents spilling from the dispensing opening or 25 f the bag toppling over. In beverage packages of this kind the dispensing opening may for instance be determined by a pierceable weakened portion capable of being pierced by a drinking straw terminating in a pointed end.
Aside from beverages, sheet bags are also used for filling 30 them with other liquid or pasty products, for instance liquid detergents. Sheet bags of this type are especially used as refill packages.
In order to impart increased stability to such stand-up bags comprising a lower bottom wall interposed between the sidewalls, and preferably composed of two wall elements welded to one another, an additional top wall element is included with a structure similar to that of the bottom wall.
1 The basic advantage of such plastic sheet bags can be seen in the fact that they can be folded extremely flat in their empty state so as to require very little storage space.
Particularly stand-up bags of a greater volume, for instance 5 a volume of up to two litres, are practically never used for containing products to be dispensed in individual metered portions, because after the bag has been opened, as by cutting off an upper corner portion, it is not ensured that the bag retains sufficient stability to remain standing 10 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 has sufficient stability for it to remain standing even after its contents have been partially dispensed, 15 which requires little storage space in its empty state, and which permits its contents to be dispensed in metered amounts and to be uniformly spread on a surface by a simple handling of the container, i.e. the bag.
20 According to the invention, this object is attained by the provision that the dispensing portion is a sheet member connected to the upper transverse margins and having a closed dispensing outlet defined by its end portion, with a restricted cross-section as compared to that of the bag, 5 the dispensing portion being closed adjacent the closed dispensing outlet by a sheet strip inserted into the dispensing portion so as to obturate the cross-sectional area of the dispensing outlet, and provided with at least one passage opening. The sheet strip inserted into the dispensing opening and provided with one or more passage openings is designed to form an applicator head permitting the bag's contents, for instance glue, to be dispensed in metered amounts. The sheet strip is inserted into the dispensing portion of the bag in such a manner that it forms the upper end of the bag after the closed end of the dispensing portion, which may for instance be sealed, has been opened, for instance by cutting it of`f by means of a pair of scissors or a knife. The sheet strip may also be r~
1 provided with a narrow slit rather than with a plurality of separate passage openings. For dispensing its contents, the bag is held with its stand-up support bottom facing upwards and the dispensing portion pointing downwards, and 5 a slight pressure is exerted on the sidewalls of the bag.
This causes the contents to be dispensed from the bag in a uniform flo~l and permits them to be evenly spread on a surface by means of the sheet strip. After use the stand-up bag can again be stood on its stand-up support bottom 10 without subsequently collapsing, since the support bottom and the sidewalls sealed to one another impart sufficient stability to the bag. A particular advantage of a bag of this type is the low weight of the package. An additional advantage results from the fact that the unfilled bag can be folded without the thickness of the respective portion Or the folded bag being substantially increased by the applicator ehad formed by the sheet strip. This stand-up bag including its dispensing ~ortion can be economically produced, since all of its components can be made of a 20 heat-sealable or weldable plastic sheet material.
In order to permit the sheet strip on the one hand to lie snugly between the sidewalls of the collapsed and folded bag, and on the other hand, to allow the dispensing portion to expand adjacent the dispensing opening in the filled 25 state of the bag, the sheet strip is provided with at least one folding seam or folding line extending between the sealed longitudinal margins of the sidewalls or of the dispensing portion, respectively. As a result the sheet strip is divided into two flat portions, the width of 30 these two flat surface portions being preferably the same.
The sheet strip is preferably provided with several passage openings aligned in a row, which in the case of a sheet strip having a folding seam or folding line should prefcr-ably extend along this seam or line, since the edge defined 35 thereby forms the foremost projecting portion of the assembly. In order to permit the bag's contents to be even more effectively spread on a surface, the sheet strip may be provided with two folding lines defining a flat surface 1 therebetween, in which case the passage openings should preferably be located on or in this flat surface.
In order to permit the sheet strip to be sealed to the inner faces of the sidewalls of the stand-up bag, it is 5 advantageously provided with two margin strip portions acting as respective sealing surfaces. These margin strip portions are preferably used for sealing or welding the sheet strip to the components of the stand-up bag before the sidewalls are sealed to one another.
The passage openings may have a circular or an elongate, slit-shaped cross-sectional configuration. The free crcss-sectional size of each passage opening should be about o.5 mm to 2 mm.
15 Since a sheet strip of the type described above has only two of its sides sealingly connected to the inner faces of the stand-up bag, and is merely in loose abutment with the sidewalls adjacent the location of their sealing seams, the sealing action should be improved by providing the ends of 20 the sheet strip with flaps extending transversely of the folding seam or folding lines on both sides thereof and adapted to lie in contact with the sidewalls to thereby effectively seal the interior of the bag at these locations.
In order to make these flaps more flexible, they are divided 2sin continuation of the respective fo~ding seam or lines, so that the thus divided portions of the flap can overlie one another.
In the closed state, i.e. in the se~led state of the stand-up bag the sheet strip may be directed towards the 30 bottom wall as viewed from the dispensing opening. This offers the advantage that the sheet strip can snap or be flexed outwards so as to project a substantial distance over the walls of the bag after the sealed dispensing opening of the stand-up bag has been opened.
The stand-up bag including the sheet strip is made of pre-cut heat-sealable sheet elements, preferably of a twin-layer compound-sheet material.
1 The stated object of the invention may also be attained by the provision that the dispensing portion is a flexible and closeable hose. This hose permits the bag's contents, for instance a glue or a self-curing foam, to be deposited at 5 awkwardly accessible locations and to be evenly metered and spread at these locations. The hose may be connected only to the upper end of the bag, cr extend down to its bottom.
In both cases the bag's contents can be dispensed by exert-ing a slight pressure on the sidewalls. In the case of a 10 hose extending down to the bottom, the bag can remain in its upright position during the dispensing operation, while the dispensing of the bag's contents through a hos~
connected only to the end of the bag requires the bag to be held with its support bottom facing upwards and the 15 hose pointing downwards. After part of the contents has been dispensed from the bag, the ba~ can again be stood on its support bottom without the danger of collapsing, since the support bottom and the sidewalls sealed to one another impart sufficient stability to the bag. A particular 20 advantage of a bag of this type is its low empty weight.
In addition, the bag can be folded very flat or thin in its emp~y or unfilled state.
The hose is preferably provided in the form of a polyethylene hose or a propylene hose, as the case might be. Hoses of 25 these materials can be readily welded to the inwards facing layer of the bag's wall consisting of a polyethylene s~eet layer. A hose made of a plastic material can be sealingly welced into the end of the bag, resulting in a continuous hermetically sealed volume between the support bottom and 30 the inserted hcse. The hose is preferably connected to a conically convergent extension formed of respective upper extensions of the plastic sheet sidewalls, so that even the last remainders of the bag's contents can flow into the hose as the bag is emptied. In order to obtain a sealing 35 surface area of the greatest possible size, the end portion of the conically cGnvergent extension should have a constant cross-section corresponding to the outer cross-sectional dimension of the hose.
1 Il order to permit different types of hoses to be connected to the dispensing opening of a stand-up bag of a given size, i.e. a bag of predetermined dimensions, it is possible to employ an adapter member made for instance of polyethylene 5 and inserted into the conical extension so that the hose can be plugged thereonto. In an advantageous embodiment such an adapter member should have its er.d facing towards the bag, i.e. the end to be sealed or welded into the conical extension, provided with an oval connecting cone 10 aligned with its longer axis in the direction of the two weld seams cf the sidewalls. An oval connection cone of this kind may terminate in pointed or wedge-shaped ends adjacent the weld seams, so that it fits between the sealed or welded sidewalls without excessively expanding them.
15 The closure of the hose may be formed by a plug inserted into the end of the hose. Another advantageous possibility for closing the hose may be achieved by a clamp which is clamped onto the hose. To this purpose the hose may be folded back on itself, and the clamp can be clamped onto 20 the hose adjacent the location of the fold. In an embodi-ment cf this kind the hose is preferably provided with a pre-established fold-back portion which may be defined by a wall portion of reduced thickness. This pre-established fold-back portion should be positioned closely adjacent 25 the end of the hose facing towards the bag.
Depending on the product the bag is intended to contain, it may be advantageous to employ a hose extending through the wall of the bag tc a location adjacent the bottom wall.
This configuration perrnits the contents of the bag to be dispensed therefrom by exerting pressure on the sidewalls even after the contents have been reduced to a small amount collecting in the bcttom portion of the bag.
According to still another aspect of the irvention, the 35 stated object may be attained by the provision that t~e dispensing opening is formed by a nozzle member incorpor-ated in the bag and provided with an applicator edge formed with at least one cutlet port the cross-sectional area at the exit end of which is small as compared to the free 1 interior cross-sectional area of the nozzle member adjacent its inlet end connected to the sheet material, the outlet port being closed by a closure cap. This nozzle member acts as an applicator head permitting the bag's contents, 5 for instance glue, to be dispensed through its outlet port(s) by holding the stand-up bag wi.th its support bottom facing upwards and the nozzle member pointing downwards and exerting a slight pressure on the sidewalls of the bag.
This causes the contents to be disp~rsed through the 10 outlet port(s) in a uniform flow which may then be e~enly spread on a surface by means of the applicator edge. It is also possible to provide a narrow slot rather than a plurality of separate outlet ports. After a given surface area has been evenly coated with the contents of the bag by 15 the use~of the applicator edge, the bag is stood on its support bottom without collapsing, since the support bottom and the sidewalls sealed to one ancther impart sufficient stability to the bag. A particular advantage of a bag of this kind is its low empty weight.
20 The nozzle member is preferably provided with a dispersion space from which the individual outlet Forts extend, so that the bag's cont~nts are uniformly distributed over the separate outlet ports. For obtaining a uniform flat surface coating the outlet ports should preferably be aligned in a 25 row at regular sp~cings, and should additionally be of the same diameter. The applicat~r edge used for spreading the bag's contents dispensed through the outlet ports may form a boundary of a flat surface acting as a spreader surface for facilitating the coating of a surface with the bag's 30 contents, for instance a viscuous glue.
For facilitating the hermetically sealing insertion of the nozzle member, the inlet end portion thereof connectea to the sheet material is provided with a connecting cone having a cross-sectional shape defined by oval outer contours which may converge into pointed or wedge-shaped ends in the direction of the longer axis, this axis being aligned between the two weld seams of the sidewalls. A connecting ,, , 2 ~ 3 ei 1 cone of this configuration fits snugly in a corres~onding opening of the bag without subjecting the sealed seams of the sidewalls to excessive stress by excessive expansion of the respective sidewall portions, so that the otherwise 5 existing danger of leakage at these location is avoided.
If the outlet ports provided in the nozzle member have an elongate cross-sectional shape in the form for instance of slcts, these slots should be aligned parallel to one another.
The preferrec' free cross-sectional area of the outlet ports 10 lies between o.5 mm and 2 mm. In addition, the outlet ports shoulc' have an exit end portion ha~ing a length of 2 mm to 5 mm with a constant cross-section~ to result in that, particularly in the case of the bag'~ contents being a pasty composition, the mass is dispensed in the form of a 15 thin extrusion having a constant cross-section.
A blade-shaped extension may be connected to the applicator edge in such a manner that the bag " contents dispensed through the outlet ports flows onto this blade, which r,lay 20 then be used for spreading the product. The blade-shaped extension may be flexible and provided with suitably shaped teeth at its end or with grooves extending over the blade surface, as may be required by the intended use.
The nozzle member is preferab'y connected to a conically 25 convergent extension formed of a sheet material as an upper extension of the sidewalls, so that even small remainders of the bag's contents can be dispensed through the outlet ports of the nozzle member or applicator head by exerting a slight pressure on the sidewalls. Fc: permitting a 30 connecting plug extending from the nozzle member to be secilingly connected to the plastic sheet walls of the stand-up bag oYer a greater length, the upper portion of the ~ag to which the nozzle member is secured should preferably have a constant cross-section.
35 For preventing the outlet ports from getting clc,gged after repeated use of the bag, the closure cap may be provided with pins arranged in a comb-like configuration so as to be insertable into the outlet ports. When the closure cap is ~ J~3 1 replaced on the dispenser nozzle member after each use of the bag, the pins are pushed through the outlet ports so as to ensure the free passage therethrough of the bag's contents when the closure cap is again removed the next 5 time the bag is to be used. When the closure cap is designed for being clamped onto the nozzle member of the bag, the comb-like pins can be non-rotatably connected to the closure cap. In this embodiment th~ closure cap and the nozzle member are preferably provided with inner and outer 10 guide surfaces, respectively, in the shape for instance of a cone, acting to align the pins in the direction of the outlet ports when the closure cap is placed onto the nozzle member. When the closure cap is designed to be threaded onto outer screw threads of the nozzle member, the comb-like 15 pins have to be disposed on a support element losely in-serted in the closure cap, so that the closure cap is permitted to be rotated relative to the pin as it is being threaded onto the nozzle member. It has been found advant-ageous to form the pins of a flexible material permitting 20 them to be yieldingly inserted into the outlet ports.
All of the solutions indicated above are characterized in that the stand-up bag is made of prefabricated heat-seal-able flat sheet elements, preferably a twin-layer compound sheet material. Excellent performance is achieved when the 25 layer facing towards the interior is a polyethylene sheet, and the outer skin is formed by a polyester sheet. The employ of a pc1yethylene sheet in the form of a ccextrusion sheet - i.e. a multiple-layer sheet material - offers the advantage that the sheet acting as the inner wall of the 30 stand-up bag c2n be adapted to specific requirements in accordance with the intended use of the stand-up bag. The side of the sheet material on which the sealing operation is to be carried out may thus be designed to ensure part-icularly effective sealing properties; in addition, the 35 composition of a coextrusion sheet of this kind can be selected so as to result in increased stiffness. The thick-ness of the outwards directed polyester sheet is at least 10 ,um, preferably 12 ,um, while the inwards facing polyethylene 2 ~ 3 ~
1 sheet or coextrusion sheet should have a thickness of 80 ~m to 200 ~m, preferably a thickness of 100 ym to 150 ~m. In order to permit the stand-up bag to be also filled with solvent-containing or migration-sensitive products, a thin 5 aluminum sheet acting as a barrier layer may be enclosed between the several sheet layers~ preferably adjacent the inwards facing sheet layer. This aluminum sheet should have a thickness of between 8 ,um and 15 jum, depending on the size of the stand-up bag, and is effective for instance lO to p~event leakage of a solvent through the walls of the bag or, in the case of migration-sensitive products, the infiltration of oxygen into the bag and thus into the product.
In order to impart optimum stability or standing ability to 15 the bag, it is advantageously designed so as to assume a substantially cylindrical shape adjacent its bottom portion in the filled state of the bag. For obtaining this cGnfig-uration, the two sidewalls are designed as rectangular elements and sealed or welded to one another along their 20 longitudinal margins. The bottom wall element is made of a substantially circular cutting in this case, and welded to the sidewalls alcng a semicircular sealing or weld seam in the collapsed state of the bag. As an alternative to the rectangular shape, the sidewalls may conically converge 25 tcwards their upper end, so that the filled stand-up bag is of substantially frusto-conical shape.
The applicator nozzle member including its flange may be made of polyethylene or polypropylene, i.e. of a material which can be readily processed and effectively welded to an inwards facing layer of the bag in the form of a polyethylene sheet.
Embodiments of the invention shall now be described in more detail by way of example with reference to the accompanying 35c'rawings, wherein:
fig. 1 shows a perspective view of a filled stand-up bag, fig. 2 shows a longitudinal sectional view of the stand-up ;.
l bag of fig. 1, fig. 3 shows a pre-cut sheet blank of a sheet strip to be inserted into the dispensing opening, 5 figs. 4 and 5 show other embodiments of sheet strips, fig. 6 shows a sectional view of the plastic sheet material used for making the stand-up bag, fig. 7 shows a perspective view of a filled stand-up bag according to another embodiment, fig. 8 shows a sectional view of the plastic sheet material used for making the stand-up bag, fig. 9 shows a longitudinal sectional view of the stand-up bag of fig. 7 with a reduced diameter of the bag, 5 fig.10 shows an enlarged illustration of a hcse sealingly welded into the stand-up bag of fig. 7, fig.11 shows a hose secured to the bag with the aid of an adapter member, 20 fig.12 shows a perspective view of a filled stand-up bag according to still another embodiment, fig.13 shows the stand-up bag of fig. 12 in its empty and folded state, fig.14 shows a longitudinally sectioned view of the stand-up bag taken along the line III~III in fig. 13, fig.15 shows a sectional view of the applicator nozzle member taken along the line IV-IV in fig. 14, fig.16 shows another embodiment of an applicator nozzle, and fig.17 shows a sectional view of the plastic sheet material used for making the stand-up bag.
A stand-up bag illustrated in figs. 1 and 2 hzs two side-walls 1 heat-sealed or welded to one another along their 35 vertically extending longitudinal margins 2 by the form-ation of respective sealing or weld seams 3. Inserted alcng the lower transverse margins 4 is a lower bottom wall elem-ent 5 acting as a support bottom and made of a circular or 1 elliptical cutting as apparent from the bottom weld seam 6 depicted in fig. 1. Bottom wall element 5 and sidewalls 1 are surface-welded or sealed to one another over the entire area between lower transverse margin 4 and bottom 5 weld seam 6, to result in a two-layer plastic sheet struct-ure acting to reinforce the lower portion of the bag's wall.
Ir. the filled state of the bag bottom wall 5 assumes a slightly sagging configuration at least at its center portion as indicated by a broken line 7 in fig. 2. The lO thus sagging bottom wall 5 cooperates with the reinforced lower transverse margins 4 to _mpart excellent standing ability to the stand-up bag.
All of the cuttings or blanks ~of which the stand-up bag is l5 composed cc,nsist of a twin-layer plastic sheet material of the type shown in cross-section in fig. 5. The outwards facing sheet 8 acting as the outer skin is a polyester sheet having a thickness of 12 ~m, while the sheet 10 facing inwards to the interior 9 of the stand-up bag and 0 acting as the inner skin is a polyethylene sheet formed as a coextrusion sheet material. Such a coextrusion sheet material is composed of several layers. This layered struct-ure may be suitably varied at the time of the coextrusion process for adapting it to any specific requirements.
Sheet 10 has a thicknecs of 150 ~um, the above indicated thicknesses cf the sheet materials being applicable for a stand-up bag having a capacity of about 1 to 1.5 litres, or no more than 2 litres. Enclosed between sheet 8 acting as the outer skin and 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 ~m and 15 ~m, depending on the size of the stand-up bag. An aluminum layer of this kind is effective for instance to prevent leakage of a solvent through the walls of the ba~ or, in the case of migration-sensitive products, the infiltration of oxygen into the bag and thus into the product.
The stand-up bag has substantially cylindrical outer con-tours. The upper portions of sidewalls 1 are continuously 2 ~
l extended to fcr~ a conical extension 11 of the bag, the end of extension 11 being formed as a dispensing cpening having a sheet strip 12 inserted therein.
As illustrated in flg. 3, sheet strip 12 consists of a 5 rectangular sheet element having a central folding seam 13 and two outer folding seams 14 defining respective margin portions 15. These margin portions 15 are used for sealing or welding sheet strip 12 into the upper end of conical extension 11 of the stand-up bag as shown in fig. 2. In the lO empty and closed state of the stand-up ~ag sheet strip 12 may by folded downwards to assume the position indicated by a broken line. The upper end of the filled and not yet used stand-up bag is sealed by a closure seam 1~ as ~chown in fig. 1. For opening the stand-up bag closure seam 16 is 15 cut off to thereby expose the dispensing opening. The stand up bag may then be held with its bottom wall 5 facing up-wards and its conical extension 1i pointing downwards, so that the pressure of the bag's contents acting on sheet strip 12 from inside causes siheet ctrip to snap outwards 20 to the position shown in fig. 2, wh~reupon the contents can be dispensed through passage openings 17 formed in sheet strip 12. Passage openings 17 may for instance be designed in the form of slits as shown in fig 3, or in the form of perforations as indicated in figs. 4 and 5.
25 Passage openings in the form of slits 17 should be disposed parallel to one another at the location of central fo~ding seam 13 as ill~strated in fig. 3. Sheet strip 12 may also be folded along several folding lines as indicated at 18 in fig. 3, resulting in the formation of a planar surface 30 19 containing passage openings 17. This surface may be used as an applicator surface for evenly spreading the bag's contents on a surface after it has been dispensed through passage openings 17.
The sheet strip 12 illustrated in fig. 4 likewise has a central folding seam 13 with passage openings 17, and the two margin portions 15 for sealing or welding sheet strip 12 to the inner faces of saidewalls 1 of conical extension 1 11. Connected to the longitudinal ends Or sheet strip 12 extending transversely of folding lines 13, 14 are respective flaps 20 formed as extensions of the central flat strip portions and folded downwards about respective folding 5 lines to point in the direction towards the interior 9 of the bag. Flaps 20 intimately contact sidewalls 1, so that also these portions of the dispensing opening are hermet-ically closed by sheet strip 12. The pressure of the bag's contents being discharged forces flaps 20 into engagement lO wit~l the interior wall surfaces.
Fig. 5 shows a sheet strip 12 similar to the one depicted in fig. 4, although without flaps at its ends. The sheet strips 12 shown in figs. 4 and 5 are particularly suitable for use in conical extensions 11 terminating in an end also 15 of conical shape. To this purpose central folding deam 13 is of a shorter length than the lateral folding lines 14 defining the margin portions 15.
Another embodiment of the invention shall now be described with reference to figs. 7 to 11. As particularly shown in figs. 7 and 9, a stand-up bag has two sidewalls 21 sealed or welded to one another along their vertically extending longitudinal margins 22 by the formation of respective sealing or weld seams 23. Inserted along the lower trans-5 verse margins 24 is a bottom wall element 25 acting as asupport bottom and formed by a circular or elliptical cutting as clearly apparent from the bottom weld seam 26 in fig. 1. Bottom wall element 25 and sidewalls 21 are surface-welded or sealed to one another over the entire area between lower transverse margin 24 and bottom weld seam 26, so that the thus obtained two-layer plastic sheet structure acts as a reinforced wall of the lower portion of the bag.
In the filled state of the bag bottom wall 25 as~umes a 35 somewhat sagging shape, at least at its central portion, as indicated in fig. 9 by the broken line 27. The thus sagging bottom wall 25 cooperates with the reinforced lower transverse rnargins 24 to impart excellent ctanding ability r3 l to the stand-up bag.
All of the pre-cut blanks of which the stand-up bag is composed consist of a twin-layer plastic sheet material as shown in cross-section ir fig. 8. The outwards facing 5 layer acting as the outer skin is a polyester sheet 28 having a thickness of 12 ym, while the layer 210 facing inwards towards the interior 29 of the stand-up bag and acting as the inner skin is a polyethylene sheet formed as a coextrusion sheet. Such a coextrusion sheet material is 10 composed of several layers resulting in a layered structure which may be varied at the time of the extrusion process for adapting it to any specific requirements. Sheet 210 has a thickness of 150 lum, the indicated sheet thicknesses being applicable in the case of a stand-up bag having a 15 capacity of about 1 to 1.5 litres, or no more than 2 litres.
Enclosed between sheet 28 acting as the outer skin and sheet 210 acting as the inner skin is a thin alumin~m sheet 210' acting as a barrier layer and having a thickness of between 8 ym and 15 ~um, depending on the size of the 20 stand-up bag. An aluminium 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 into the bag and thus into the product.
The stand-up bag has substantially cylindrical outer con-tours. The upper portions of sidewalls 21 are integrally extended to form a conical extension 211 defining a dispens-ing opening at its end, the said end of extension 211 hav-ing a hose 212 made of a plastic material sealingly in-serted therein~ ~ose 212 may have any suitable length, depending on the intended use of the stand-up bag. The flexibility of hose 212 permits it to be positioned at not readily accessible locations for thereat spreading the bag's contents. The end of hose 212 may be closed by a plug 213 as illustrated in fig. 7. Another possibility of closing hose 212 consists in that the hose is folded back upon itself at a pre-established folding location 21LI which l may be defined by a wall portion of reduced thickness of hose 212, the rearwards folded end portion 215 of the hose being clamped to hcse 212 by a clamp 216 as shown in fig.9.
The hose shown in fig. 9 extends right through the interior 5 29 of the stand-up bag to a location adjacent bottom wall 25, to thereby permit remainders of the bag's contents collecting adjacent the bottom portion to be dispensed.
Fig. 10 shows the upper end portion of conical extension 10 211. This upper end portion i defined by parallel walls, so that hose 212 can be sealed into this end portion in surface contact therewith over an extended area. By contrast to the embodiment according to f'ig. 9, the hose 212 shown in fig. 10 terminates within extension 211 at a location 15 indicated by a broken line 217 in fig. 9. Fig. 11 shows the conical extension 211 to which hose 212 is connected by an adapter member 218 interposed therebetween. Adapter member 218 may be provided with a connecting cone 219 of oval cross-sectional shape, ~;ith the long axis of the oval cross-section extending in the direction of weld seams 23, so that the adapter member 218 fits snugly into the connect-ion betw~een weld seams 23 and sidewalls 21; as a result, the weld seams 23 are not subjected to excessive stress by being unnecessarily expanded adjacent these locations. The portion of adapter member 218 to which hose 212 is connected projects outwards from adapter member 219 and may be of any suitable thickness, permitting hoses 212 of different diameters to be connected to the stand-up bag.
Adapter member 218 is preferably made of polyethylene.
30 A still further embodiment of the invention shall now be discussed with reference to figs. 12 to 17. As particul-arly shown in figs. 12, 13 and 14, the illustrated stand-up bag has two sidewalls 31 sealed or welded to one another along their vertically extending longitudinal margins 32 35 by the formation of respective sealing or weld seams 33.
Inserted along the lower transverse margins 34 is a lower bottom wall element 35 acting as a support bottom and formed as a circular or eliiptical cutting as clearly apparent ~ 3 1 from the bottom weld seam 36 shown in fig. 13. Bottom wall element 35 and sidewalls 31 are surface-welded or sealed to each other over the entire area between lower transverse margins 34 and bottom weld seam 6, so that the thus obtained 5 two-layer plastic sheet structure acts as a reinforced wall of this lower portion of the bag.
In the filled state of the stand-up bag,bottom wall element 35 assumes a slightly sagging shape, at least at its central portion, as indicated by the broken line 37 in 10 fig. 14. The sagg~ng bottom wall 35 cooperates with the reinforced lower transverse margins 34 to result in an excellent stability of the stand-up bag in its standing position.
5 All of the pre-cut elements of which the stand-up bag is composed consist of a twin-layer plastic sheet material as shown in cross-section in fig. 16. The outwards facing layer 38 acting as the outer skin is a polyester sheet having a thickness of 12 ~m, while the layer 310 facing inwards towards the interior 39 of the stand-up bag and acting as the inner skin is a polyester sheet formed as a coextrusion sheet material. Such a coextrusion sheet material is composed of several layers resulting in a layered structure which may be varied at the time of the extrusion process for adaptation to any specific require-ments. Sheet 310 has a thickn~ss of 150 ~um, the indicated sheet thicknesses being applicable in the case of a stand-up bag having a capacity of about 1 to 1.5 litres, or no more than 2 litres. Interposed between sheet 38 acting as the outer skin and sheet 310 acting as the inner skin is a thin aluminu~ sheet 310' acting as a barrier layer and ha~ing a thickness of between 8 jum and 15 ~m, depending on the size of the stand-up bag. An aluminum layer of this kind is effective for instance to prevent the leakage of a solvent through the walls of the bag or, in the case of a migration-sensitive product, the infiltration of oxygen into the bag and thus into the product.
The stand-up bag has substantially cylindrical outer contours.
2'~
1 The upper portions of sidewalls 31 are integrally extended to form a conical extension 311, the end of which defines a dispensing opening having an applicator nozzle member 312 sealingly inserted therein. As shown in figs. 13 and 14, 5 nozzle member 312 is provided with a connecting cone 313 having an oval or elliptical cross-section and being sealingly inserted into conical extension 311, the end portion of which has a constant interior cross-section.
The long axis of the oval cross-section of connecting cone 10 313 is aligned in the direction between the two weld seams 33 connecting the longitudinal margins 32 of sidewalls 31 to one another. At the juncture of the two sidewalls 31, connecting cone terminates in a pointed or wedge-shaped end so as to conform to the shape of sidewalls 31 at this 15 location. As a result, sidewalls 31 are not subjected to excessive stress at the location Or the seams. As shown in fig. 15, applicator nozzle member 312 can be closed by a closure cap 315 having inner screw threads 316 for thread-ing it onto outer screw threads 317 on applicator nozzle 20 member 312. The end of applicator nozzle member 312 is formed with a flat surface 318 including the openings of five outlet ports 319 each having a cross-section of about 1 mm. The flat surface 318 is defined by two applicator edges 320 forming a transition to respective tapered 25 surfaces 321. Apart from these tapered surfaces 321, applicator nozzle member 312 has a circular cross-section.
Both the applicator edges 320 and flat surface 318 as well as tapered surfaces 321 serve to apply the bag's contents dispensed through outlet ports 319 to a surface and to 30 evenly spread it thereon. For this applying operation the stand-up bag is held with applicator nozzle 312 pointing downwards, so that its contents are dispensed through out-let ports 319, aided, if need be, by the exertion of a slight pressure on sidewalls 31. The construction of the 35bag with its lower bottom wall element 35 acting as a support bottom and the weld seams 33 sealingly interconnect-ing its sidewalls 31 ensures sufficient stability of thebag even after its contents have been partially dispensed, l thus enabling it to stand upright on its support bottom even when partially empty. Inserted into closure cap 315 is an insert member 322 provided with pins 323 in an arrangement corresponding to that of outlet ports 319 on 5 nozzle member 312, so that they are pushed into outlet ports 319 when applicator nozzle 312 is closed after use.
By this provision it is ensured that the outlet ports remain open even after repeated use, and are not clogged by the bag's contents. This insert member 322 is supported 10 on the interior wall surface of closure cap 315 and is not entrained to rotate in unison therewith when applic-ator nozzle 312 is opened or closed. In a modified embodi-ment of closure cap 315, in which it is merely clamped onto applicator nozzle 312 and therefore not provided with 1~ screw threads, insert member 322 may be integrally and non-rotatably connected with closure cap 315.
As viewed from the side of their exit ends, outlet ports 319 extend parallel to each other over a length of 5 mm with a constant cross-section. Provided between outlet 20 ports 319 and connecting cone 313 is a dispersion space 325 effective to ensure that the bag's contents are evenly distributet between the separate outlet ports 319. The outlet ports 319 may be formed in an insert member diagram-matically indicated at 326. It is thus possible to adapt 25 applicator nozzle 312 to different requirements by the insertion thereinto of insert members having different arrangements of outlet ports 319. By contrast to the applicator nozzle shown in fig. 15, the applicator nozzle of fig. 16 has seven outlet ports 319 and is provided with 30 a blade-shaped extension 327 extending from one side of the flat surface 318 including the openings of outlet ports 319.
Otherwise the construction of the applicator nozzle 312 of fig~ 16 is similar to that of the embodiment shown in fig. 15, there being likewise provided a closure cap to be clamped 35 onto the nozæle for closing it. The blade-shaped extension 327 is preferably formed of a flexible material and provided with grooves 328 extending in the direction of the axes of outlet ports 319 and useful for spreading the bag's contents dispensed through outlet ports 319 on a surface.
Claims (49)
1. A stand-up bag made of a heat-sealable or weldable plastic sheet material and adapted to contain liquid and/or pasty products, comprising two substantially rect-angular sidewall-forming sheet elements sealed to one another along their longitudinal margins, a foldable bottom wall element acting as a stand-up support bottom and adapted to lie between said sidewalls being interposed between the lower transverse margins of said sidewalls, and a dispens-ing portion adjacent the upper transverse margins, characterized in that said dispensing portion is a sheet member connected to said upper transverse margins and having a dispensing outlet-defining end portion of a restricted cross-section as compared to that of said bag, the dispensing outlet of said dispensing portion (11) being closed by a sheet strip (12) inserted into said dispensing portion so as to close the cross-sectional area of said dispensing outlet, and provided with at least one passage opening (17).
2. A stand-up bag according to claim 1, characterized in that said sheet strip (12) has at least one folding seam (13) extending between the sealed longitudinal margins (2) of said sidewalls (1) or said dispensing portion, respectively.
3. A stand-up bag according to claim 1 or 2, character-ized in that a plurality of said passage openings (17) are aligned in a row.
4. A stand-up bag according to claim 1 or 2, character-ized in that said sheet strip (12) has two folding lines (18) defining therebetween a flat surface (19) over which several of said passage openings (17) are distributed.
5. A stand-up bag according to any of claims 1 to 4, characterized in that said sheet strip (12) has two margin strip portions (15) by means of which it is sealed to the inner sides of said sidewalls (1).
6. A stand-up bag according to any of claims 1 to 5, characterized in that said passage openings (17) are slits.
7. A stand-up bag according to any of claims 1 to 6, characterized in that said passage openings (17) have an open cross-section of o.5 mm to 2 mm.
8. A stand-up bag according to any of claims 2 to 7, characterized in that said sheet strip (12) has its ends provided with flaps (20) extending transversely of said folding seams/folding lines (13; 18) on both sides thereof and adapted to lie in contact with said sidewalls (1).
9. A stand-up bag according to claim 8, characterized in that said flaps (20) are divided in continuation of said folding seam/folding lines (13; 18).
10. A stand-up bag according to any of claims 1 to 9, characterized in that in the closed position said sheet strip (12) is directed towards said bottom wall (5) as viewed from said dispensing opening.
11. A stand-up bag according to any of claims 1 to 10, characterized in that said dispensing portion is a con-ically convergent extension (11) of the bag.
12. A stand-up bag according to any of claims 1 to 11, characterized in that the end section of said dispensing portion has a constant cross-section.
13. A stand-up bag according to the generic clause of claim 1, characterized in that said dispensing portion is a flexible and closeable hose (212).
14. A stand-up bag according to claim 13, characterized in that said hose (212) is welded into said plastic sheet material.
15. A stand-up bag according to claim 13 or 14, characterized in that said hose (212) is connected to a conically convergent extension (211) or a spout of said bag.
16. A stand-up bag according to claim 15, characterized in that the end portion of said extension (211) has a constant cross-section corresponding to the outer cross-section of said hose (212).
17. A stand-up bag according to any of claims 13 to 16, characterized in that said hose (212) is secured to the sheet material walls with an adapter (218) interposed therebetween.
18. A stand-up bag according to claim 17, characterized in that the end of said adapter (218) facing towards the bag is provided with a connecting cone (219) having an oval outer cross-sectional shape.
19. A stand-up bag according to any of claims 13 to 18, characterized in that said hose (212) is closed by a plug (213) inserted into its end (215).
20. A stand-up bag according to any of claims 13 to 18, characterized in that said hose (212) is closed by a clamp (216) clamped thereonto.
21. A stand-up bag according to claim 20, characterized in that said hose (212) is provided with a pre-established fold-back location (214) formed by a wall portion of reduced thickness.
22. A stand-up bag according to claim 21, characterized in that said pre-established fold-back location (214) is provided adjacent the end facing towards the bag.
23. A stand-up bag according to any of claims 13 to 22, characterized in that said hose (212) extends through the wall of the bag to a location adjacent the bottom wall (25).
24. A stand-up bag according to the generic clause of claim 1, characterized in that said dispensing opening is formed by a nozzle member (312) incorporated in the bag, said nozzle member (312) being provided with an applicator edge (320) formed with at least one outlet port (319) the cross-sectional area at the exit end of which is small as compared to theifree interior cross-sectional area of said nozzle member (312) adjacent its inlet end connected to the sheet material, said outlet port (319) being closed by a closure cap (315).
25. A stand-up bag according to claim 24, characterized in that a dispersion space (325) is provided between said outlet port(s) (319) and the inlet end portion of said nozzle member (313)
26. A stand-up bag according to claim 24 or 25, charact-erized in that several of said outlet ports (319) are aligned in a row.
27. A stand-up bag according to any of claims 24 to 26, characterized in that said applicator edge (320) borders a flat surface (318) containing the openings of said outlet ports (319).
28. A stand-up bag according to any of claims 24 to 27, characterized in that the inlet end portion of said nozzle member (312) is provided with a connecting cone (313) having an ovel outer cross-sectional shape.
29. A stand-up bag according to any of claims 24 to 28, characterized in that said outlet ports (319) are directed parallel to one another.
30. A stand-up bag according to any of claims 24 to 29, characterized in that said outlet ports (319) are formed as bores with their respective axis extending in the direction of the longitudinal axis of the bag.
31. A stand-up bag according to any of claims 24 to 30, characterized in that said outlet ports (319) have a cross-sectional size of o.5 mm to 2 mm.
32. A stand-up bag according to any of claims 24 to 31, characterized in that said outlet ports (319) have a constant-cross-section length of 2 mm to 5 mm as viewed from their respective exit ends.
33. A stand-up bag according to any of claims 24 to 32, characterized in that a blade-shaped extension (327) is provided to extend from said applicator edge (320).
34. A stand-up bag according to any of claims 24 to 33, characterized in that said blade-shaped extension (327) is formed with grooves (328) extending in the direction of the axes of said outlet ports (319).
35. A stand-up bag according to any of claims 24 to 34, characterized in that said nozzle member (312) is connected to a conically convergent extension (311) of the bag.
36. A stand-up bag according to any of claims 24 to 35, characterized in that the portion of the bag to which said nozzle member (312) is secured has a constant cross-section.
37. A stand-up bag according to any of claims 24 to 36, characterized in that said closure cap (315) is provided with pins (323) arranged in a comb-like configuration and adapted to be pushed into said outlet ports (319).
38. A stand-up bag according to claim 37, characterized in that said pins (323) consist of a flexible material.
39. A stand-up bag according to claim 37 or 38, characterized in that said pins (323) are disposed on an insert member (322) inserted into said closure cap (315).
40. A stand-up bag according to any of claims 1 to 39, characterized in that said plastic sheet material is a twin-layer compound sheet (8,28,38; 10,210,310).
41. A stand-up bag according to claim 40, characterized in that the sheet (10,210,310) facing towards the interior (9,29,39) is a polyethylene sheet.
42. A stand-up bag according to claim 39 or 41, characterized in that the outwards facing sheet (8,28,38) acting as the outer skin is a polyester sheet.
43. A stand-up bag according to claim 40, characterized in that said polyethylene sheet is a coextrusion sheet.
44. A stand-up bag according to any of claims 40 to 43, characterized in that said outwards facing sheet (8,28,38) has a thickness of at least 10 µm.
45. A stand-up bag according to claim 44, characterized in that the thickness of said outwards facing sheet (8,28, 38) is 12 µm.
46. A stand-up bag according to any of claims 40 to 45, characterized in that said inwards facing sheet (10,210, 310) has a thickness of 80 µm to 200 µm.
47. A stand-up bag according to claim 46 7 characterized in that the thickness of said inwards facing sheet (10,210, 310) is 100 µm to 150 µm.
48. A stand-up bag according to any of claims 40 to 47.
characterized in that an aluminum sheet (10',210',310') is enclosed between the layers of said compound sheet (8,28,38;
10,210,310).
characterized in that an aluminum sheet (10',210',310') is enclosed between the layers of said compound sheet (8,28,38;
10,210,310).
49. A stand-up bag according to claim 48, characterized in that said aluminum sheet (10',210',310') has a thickness of between 8 µm and 15 µm.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG8900884.7 | 1989-01-26 | ||
| DE8900884U DE8900884U1 (en) | 1989-01-26 | 1989-01-26 | Stand-up pouch |
| DE8900885U DE8900885U1 (en) | 1989-01-26 | 1989-01-26 | Stand-up pouch |
| DEG8900886.3 | 1989-01-26 | ||
| DE8900886U DE8900886U1 (en) | 1989-01-26 | 1989-01-26 | Stand-up pouch |
| DEG8900885.5 | 1989-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2045555A1 true CA2045555A1 (en) | 1990-07-27 |
Family
ID=27207991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002045555A Abandoned CA2045555A1 (en) | 1989-01-26 | 1990-01-25 | Stand-up bag |
Country Status (11)
| Country | Link |
|---|---|
| EP (2) | EP0380107B1 (en) |
| JP (1) | JPH04503045A (en) |
| AT (1) | ATE87875T1 (en) |
| CA (1) | CA2045555A1 (en) |
| DE (1) | DE59001144D1 (en) |
| DK (1) | DK0380107T3 (en) |
| ES (1) | ES2040514T3 (en) |
| FI (1) | FI913602A0 (en) |
| IE (1) | IE900283L (en) |
| NO (1) | NO912913L (en) |
| WO (1) | WO1990008703A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6076968A (en) * | 1996-11-26 | 2000-06-20 | The Coca-Cola Company | Easy open flexible pouch |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3914517A1 (en) * | 1989-03-10 | 1990-09-13 | Coster Tecnologie Speciali Spa | TWO CHAMBER PACK |
| JPH06200215A (en) * | 1992-12-29 | 1994-07-19 | Inax Corp | Organic adhesive package for tile laying and laying of tile |
| JP3229444B2 (en) * | 1993-07-06 | 2001-11-19 | ブラザー工業株式会社 | Ink supply device and wrapping ink impregnated foam |
| SE513561C2 (en) * | 1998-02-17 | 2000-10-02 | Eco Lean Ab | Container, method and apparatus for making a container and method and apparatus for filling a container |
| DE10349048A1 (en) * | 2003-10-17 | 2005-05-19 | Herrmann Gmbh | Ready meal is a dehydrated foodstuff, within a film bag, to be reconstituted by added liquid and mixed by squeezing the bag which can be boiled or cooked in a conventional or microwave oven |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE554969A (en) * | ||||
| US3418059A (en) | 1967-03-20 | 1968-12-24 | Robe Associates | Dispenser package for flowable materials and method of forming same |
| 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 |
| SE394853B (en) * | 1975-04-15 | 1977-07-18 | Jerund Devello Ab | DEVICE FOR FITTED VETERATORS INTENDED FOR MEDICAL ENVIRONMENT |
| DE7526045U (en) * | 1975-08-16 | 1975-12-11 | Hoechst Ag | Pouch with puncture site |
| JPS54117583A (en) * | 1978-02-09 | 1979-09-12 | American Can Co | Multilayer laminated structure and mutiwalled bag body produced therefrom |
| CA1106317A (en) * | 1979-11-26 | 1981-08-04 | Robert D. Foster | Dispensing bag |
| FR2504091A1 (en) * | 1981-04-16 | 1982-10-22 | Bernhardt Cie | Semi rigid pack with flexible outlet tube - for controlled discharge of part of the contents |
| JPS5827956U (en) * | 1981-08-18 | 1983-02-23 | 株式会社東芝 | Optical semiconductor device |
| JPS58194838A (en) * | 1982-05-11 | 1983-11-12 | Citizen Watch Co Ltd | Low-temperature liquid crystal composition |
| JPH0221399Y2 (en) * | 1985-02-14 | 1990-06-08 |
-
1990
- 1990-01-25 AT AT90101518T patent/ATE87875T1/en active
- 1990-01-25 WO PCT/EP1990/000139 patent/WO1990008703A1/en not_active Application Discontinuation
- 1990-01-25 ES ES199090101518T patent/ES2040514T3/en not_active Expired - Fee Related
- 1990-01-25 IE IE900283A patent/IE900283L/en unknown
- 1990-01-25 JP JP2503468A patent/JPH04503045A/en active Pending
- 1990-01-25 EP EP90101518A patent/EP0380107B1/en not_active Expired - Lifetime
- 1990-01-25 CA CA002045555A patent/CA2045555A1/en not_active Abandoned
- 1990-01-25 DK DK90101518.0T patent/DK0380107T3/en active
- 1990-01-25 DE DE9090101518T patent/DE59001144D1/en not_active Expired - Fee Related
- 1990-01-25 EP EP90903339A patent/EP0455732A1/en active Pending
-
1991
- 1991-07-25 NO NO91912913A patent/NO912913L/en unknown
- 1991-07-26 FI FI913602A patent/FI913602A0/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6076968A (en) * | 1996-11-26 | 2000-06-20 | The Coca-Cola Company | Easy open flexible pouch |
Also Published As
| Publication number | Publication date |
|---|---|
| IE900283L (en) | 1990-07-26 |
| WO1990008703A1 (en) | 1990-08-09 |
| NO912913D0 (en) | 1991-07-25 |
| DE59001144D1 (en) | 1993-05-13 |
| EP0380107B1 (en) | 1993-04-07 |
| EP0380107A1 (en) | 1990-08-01 |
| FI913602A0 (en) | 1991-07-26 |
| EP0455732A1 (en) | 1991-11-13 |
| NO912913L (en) | 1991-07-25 |
| ATE87875T1 (en) | 1993-04-15 |
| JPH04503045A (en) | 1992-06-04 |
| DK0380107T3 (en) | 1993-05-17 |
| ES2040514T3 (en) | 1993-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |