EP1338523A1 - Method for fabricating a bag with a flat bottom, and a bag thus obtained - Google Patents
Method for fabricating a bag with a flat bottom, and a bag thus obtained Download PDFInfo
- Publication number
- EP1338523A1 EP1338523A1 EP03075294A EP03075294A EP1338523A1 EP 1338523 A1 EP1338523 A1 EP 1338523A1 EP 03075294 A EP03075294 A EP 03075294A EP 03075294 A EP03075294 A EP 03075294A EP 1338523 A1 EP1338523 A1 EP 1338523A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bellows
- tubular element
- bag
- sides
- flattened tubular
- 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.)
- Withdrawn
Links
Images
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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
Definitions
- the present invention relates to a method for fabricating a bag with a flat bottom and to a bag thus obtained.
- the aforesaid continuous tubular element is then provided, on its opposite longitudinal sides, with appropriate areas turned inwards, in the branch referred to herein as "bellows formation", which enable it to be amply developed in an open condition and enable a bottom having a certain width to be obtained, but one that is not flat.
- the next step in the process is to use an appropriately designed transverse welding rod, which functions intermittently, to form both the mouth (either opened or closed) of the bag and the weld for closing so as to obtain the bottom of the bag, blocking both the opposite sides of the flattened tubular element and the inner sides of the two bellows formations by means of a single weld.
- the use of the above bags is by now fairly widespread and is bound to continue increasing.
- the aforesaid bags are also used for containing objects having a certain weight, even though they present a bottom of limited dimensions as compared to the transverse development that the bag may have given by the sum of the sides of the flattened tubular element and the size of the internal sides of the bellows all splayed out together.
- the purpose of the present invention is therefore to identify a solution to the technical problem referred to above by making a bag with a wide flat bottom.
- Another purpose of the invention is to provide a bag with a flat bottom that is particularly valid and that is able to perform the function outlined previously, which will be particularly simple to construct.
- Yet a further purpose of the present invention is to provide a bag with a flat bottom which will be able to be manufactured automatically, without any need for manual intervention for its completion.
- the bag with flat bottom 11 is obtained from a flattened tubular element 12 provided with lateral bellows formations 13 folded towards the inside of the tubular element itself.
- the bag 11, which is illustrated finished, envisages an open mouth 14 and a quadrilateral bottom 15, having in the case illustrated by way of example in Figure 4 a rectangular shape, even though the said quadrilateral bottom 15 may also be square.
- the bag 11 comprises a bottom element 16, which is inserted inside an open end of the flattened tubular element 12 with the free edges of both elements, towards the outside, set aligned and one on top of the other.
- the bottom element 16 is made initially of a quadrilateral sheet (see Figure 2), which is folded in a first direction into two halves along a first folding axis 17, keeping two external sides or parallel edges 18 parallel to said first folding axis 17 and so that they have a size that is equal to the initial size.
- said bottom element 16 is inserted into the aforesaid flattened tubular element 12 by bringing the two opposite bellows 20 of said bottom element 16 astride of the lateral bellows 13 of the flattened tubular element 12.
- the weld is a perimetral weld, which constrains, in a first portion 22, the sides that remain in view of the flattened tubular element 12 with the sides 18 of the bottom element 16 and, in a second portion 23, the sides of the internal bellows 13 of the flattened tubular element 12 with the sides or internal edges of the two opposite internal bellows 20 of the bottom element 16; of course, this is done whilst the latter are set in the folded condition on top of each other.
- a perimetral weld is then made between the sides and the end bellows of the flattened tubular element 12 and the sides and the bellows of the bottom element 16, so obtaining a bag, which, in the splayed-out and open condition has a quadrilateral flat bottom.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Making Paper Articles (AREA)
Abstract
A method for fabricating a bag with a flat bottom comprises: making a flattened tubular element (12) with lateral bellows (13); obtaining a quadrilateral bottom of a single piece (15), folding the bottom in a single piece to identify two opposite bellows, inserting the bottom (16) thus folded into the flattened tubular element (12), bringing the two opposite bellows (20) of the bottom so that they are astride of the lateral bellows (13) of the flattened tubular element (12); and welding the ends facing outwards of the flattened tubular element to the outer sides (18) of the bottom (16) and to the inner edges of the two opposite bellows obtained in the bottom.
Description
- The present invention relates to a method for fabricating a bag with a flat bottom and to a bag thus obtained.
- In the field of automatic manufacture of bags, both bags with handles (shopping bags or shoppers) and without handles (open-mouthed bags), it is normal to use as starting material a continuous tubular element, which is, in general, made of thermoplastic material.
- The aforesaid continuous tubular element is then provided, on its opposite longitudinal sides, with appropriate areas turned inwards, in the branch referred to herein as "bellows formation", which enable it to be amply developed in an open condition and enable a bottom having a certain width to be obtained, but one that is not flat.
- In fact, once the continuous tubular element provided with longitudinal side bellows formations is created, the next step in the process is to use an appropriately designed transverse welding rod, which functions intermittently, to form both the mouth (either opened or closed) of the bag and the weld for closing so as to obtain the bottom of the bag, blocking both the opposite sides of the flattened tubular element and the inner sides of the two bellows formations by means of a single weld.
- The use of the above bags is by now fairly widespread and is bound to continue increasing. The aforesaid bags are also used for containing objects having a certain weight, even though they present a bottom of limited dimensions as compared to the transverse development that the bag may have given by the sum of the sides of the flattened tubular element and the size of the internal sides of the bellows all splayed out together.
- There is consequently felt the need to make bags with wider bottoms, for example, bags with flat bottoms, which will present a certain degree of sturdiness and a certain degree of strength.
- So far, no solution has been found to the above rather important technical problem.
- The purpose of the present invention is therefore to identify a solution to the technical problem referred to above by making a bag with a wide flat bottom.
- Another purpose of the invention is to provide a bag with a flat bottom that is particularly valid and that is able to perform the function outlined previously, which will be particularly simple to construct.
- Yet a further purpose of the present invention is to provide a bag with a flat bottom which will be able to be manufactured automatically, without any need for manual intervention for its completion.
- The above purposes according to the present invention are achieved by providing a bag with a flat bottom and by a method for fabrication thereof, as set forth in the attached independent claims.
- Further salient characteristics and details of the present invention form the subject of the dependent claims.
- The characteristics and advantages of a bag with a flat bottom and of a method for fabrication thereof according to the present invention will emerge more clearly from the ensuing description, which is provided purely by way of non-limiting example, of an embodiment thereof, with reference to the attached figures, in which:
- Figure 1 is a side view of a bag in a folded condition or position made according to the present invention;
- Figure 2 is a top plan view of a bottom element in a non-operative condition, laid out flat, which must then be included in the bag of Figure 1 according to the present invention;
- Figure 3 is a perspective side view of the bottom element of Figure 2 in a folded condition ready for being inserted within the initial tubular element having an external shape that is the same as the one illustrated in Figure 1;
- Figure 4 is a perspective view, from beneath, of the bag of Figure 1, when it is partially splayed out in an operative condition and is provided with the flat-bottom element illustrated in Figures 2 and 3; and
- Figure 5 illustrates an enlarged view of a closed bottom end portion of the bag of Figure 1.
- With reference to the various figures taken as a whole, there is illustrated in an altogether schematic way a bag with a flat bottom according to the invention, designated, as a whole, by 11 and obtained according to the method, which itself constitutes a novelty and inventive idea of the invention.
- The bag with
flat bottom 11 is obtained from a flattenedtubular element 12 provided withlateral bellows formations 13 folded towards the inside of the tubular element itself. - The
bag 11, which is illustrated finished, envisages anopen mouth 14 and aquadrilateral bottom 15, having in the case illustrated by way of example in Figure 4 a rectangular shape, even though the saidquadrilateral bottom 15 may also be square. - In the folded condition, the
bag 11 comprises abottom element 16, which is inserted inside an open end of the flattenedtubular element 12 with the free edges of both elements, towards the outside, set aligned and one on top of the other. - The
bottom element 16 is made initially of a quadrilateral sheet (see Figure 2), which is folded in a first direction into two halves along afirst folding axis 17, keeping two external sides orparallel edges 18 parallel to saidfirst folding axis 17 and so that they have a size that is equal to the initial size. - Next, in a second operating step carried out on the
aforesaid bottom element 16, the further twosides 19 are folded in order to identify twoopposite bellows 20 by bringing acentral folding line 21 of saidbellows 20 thus identified into a position perpendicular to saidfirst axis 17. - Once the
bottom element 16 has been folded as described above, saidbottom element 16 is inserted into the aforesaid flattenedtubular element 12 by bringing the twoopposite bellows 20 of saidbottom element 16 astride of thelateral bellows 13 of the flattenedtubular element 12. - In this way, the configuration and arrangement illustrated in Figure 1 is achieved, except for the weld. In fact, it is at this point that the step of welding the ends facing the outside of the flattened
tubular element 12, opposite to theopen mouth 14, with the corresponding ends of thelateral bellows 20 of thebottom elements 16 is carried out. - During the above operation, the
outer sides 18 of thebottom element 16 parallel to thefirst folding axis 17 are kept so that thesaid sides 18 are set aligned with the end of the flattenedtubular element 12. The weld is a perimetral weld, which constrains, in afirst portion 22, the sides that remain in view of the flattenedtubular element 12 with thesides 18 of thebottom element 16 and, in asecond portion 23, the sides of theinternal bellows 13 of the flattenedtubular element 12 with the sides or internal edges of the two oppositeinternal bellows 20 of thebottom element 16; of course, this is done whilst the latter are set in the folded condition on top of each other. - A perimetral weld is then made between the sides and the end bellows of the flattened
tubular element 12 and the sides and the bellows of thebottom element 16, so obtaining a bag, which, in the splayed-out and open condition has a quadrilateral flat bottom. - It is evident that a splayed-out and open bag provided with a quadrilateral flat bottom may be obtained also following steps other than the ones described previously, and hence the present invention also regards, in a much simpler manner, the said bag, irrespective of the method with which it is obtained.
- It has thus been seen how the said bag with flat bottom and the method indicated according to the present invention achieve the purposes specified previously.
- The method of fabrication of a bag with flat bottom, as well as the bag thus obtained according to the present invention, as conceived herein, may undergo numerous modifications and variations all falling within the scope of the same invention.
- Furthermore, in practice, the materials used, as well as the dimensions and components, may be any whatsoever according to the technical requirements.
Claims (4)
- Bag with flat bottom obtained from a flattened tubular element (12) with side bellows (13), characterized in that said flat bottom is obtained from a bottom element (16), which is quadrilateral and has a perimetral weld, at the ends of the sides and of the bellows of said tubular element.
- Bag with flat bottom according to Claim 1, characterized in that said perimetral weld is made, in one of its first portions (22), between the sides in view of the flattened tubular element (12) with the first opposite sides (18) of said bottom element (16) and, in one of its second portions (23), between the sides of the internal bellows (13) of said flattened tubular element (12) with the remaining two sides or internal edges of two opposite internal bellows (20) of said bottom element (16).
- Method for fabricating a bag with flat bottom, characterized in: making a flattened tubular element (12) with side bellows (13); obtaining a quadrilateral bottom of a single piece (15), the perimeter of which has a size equal to that given by the sum of said tubular element and said bellows; folding said bottom in a single piece along one of its first axes (17), keeping the outer sides (18) parallel to said axis (17) and of a size equal to the initial one; folding the other two sides (19) to identify two opposite bellows (20), bringing a central folding line (21) of said bellows thus identified into a position perpendicular to said first axis (17); inserting said bottom element (16) thus folded into said flattened tubular element (12), bringing said two opposite bellows (20) of said bottom so that they are astride of said lateral bellows (13) of said flattened tubular element (12); and welding the ends facing outwards of said flattened tubular element and of the corresponding lateral bellows respectively to said outer sides (18) which are parallel to said axis (17) and are of a size equal to the initial size of said bellows and to the internal edges of said two opposite bellows obtained in said bottom.
- Method according to Claim 3, characterized in that said bottom element (16) is obtained having a rectangular shape.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2002MI000291A ITMI20020291A1 (en) | 2002-02-14 | 2002-02-14 | METHOD OF MANUFACTURE OF A FLAT BOTTOM BAG AND SO BAG |
ITMI20020291 | 2002-02-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1338523A1 true EP1338523A1 (en) | 2003-08-27 |
Family
ID=11449239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03075294A Withdrawn EP1338523A1 (en) | 2002-02-14 | 2003-01-31 | Method for fabricating a bag with a flat bottom, and a bag thus obtained |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030152298A1 (en) |
EP (1) | EP1338523A1 (en) |
JP (1) | JP2003237797A (en) |
CA (1) | CA2418427A1 (en) |
IT (1) | ITMI20020291A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2876084A1 (en) * | 2004-10-06 | 2006-04-07 | Brink S France Sa | Package for transporting object e.g. bank note, has propulsion pockets propelling package by compressed air of pneumatic system, sheets forming pockets and fixed on bag, and gusset provided at end of bag opposite to bag`s opening |
US8790230B2 (en) | 2009-07-22 | 2014-07-29 | Anapo Plastics, Llc | Method of manufacturing a stand-up bag |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2859987B1 (en) * | 2003-09-19 | 2006-02-10 | Autobar Flexible Packaging | ENVELOPE USED ON PNEUMATIC TRANSPORT NETWORKS |
ITRM20070033U1 (en) * | 2007-02-01 | 2008-08-02 | Vittoria Carnevale | ENVELOPE WITH BAR CODE |
JP2011031946A (en) * | 2009-07-31 | 2011-02-17 | Meiko Shoji Kk | Wet sheet package |
DE202011102943U1 (en) * | 2011-07-05 | 2012-07-04 | Bischof + Klein Gmbh & Co. Kg | packaging container |
PL71772Y1 (en) * | 2018-02-28 | 2021-01-25 | Hitec Film Spolka Z Ograniczona Odpowiedzialnoscia | Elastic sack, preferably for storage of fluid and loose products |
USD920128S1 (en) * | 2019-04-19 | 2021-05-25 | Flat System S.R.L. | Packaging bag |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2600627A1 (en) * | 1986-06-27 | 1987-12-31 | Gieza Paul | Packaging bag for loose products |
JPH07314587A (en) * | 1994-05-27 | 1995-12-05 | Hosokawa Yoko:Kk | Manufacture of bag |
FR2744699A1 (en) * | 1996-02-13 | 1997-08-14 | Hosokawa Yoko Kk | BAG AND METHOD FOR MANUFACTURING SUCH BAG |
GB2317159A (en) * | 1996-02-13 | 1998-03-18 | Hosokawa Yoko Kk | Closing one or both ends of a generally tubular bag |
US6334710B1 (en) * | 1997-08-14 | 2002-01-01 | Hosokawa Yoko Co., Ltd. | Self-standing container |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1106339B1 (en) * | 1999-12-02 | 2006-09-27 | Totani Corporation | Plastic bag making apparatus |
-
2002
- 2002-02-14 IT IT2002MI000291A patent/ITMI20020291A1/en unknown
-
2003
- 2003-01-31 US US10/354,843 patent/US20030152298A1/en not_active Abandoned
- 2003-01-31 EP EP03075294A patent/EP1338523A1/en not_active Withdrawn
- 2003-02-03 CA CA002418427A patent/CA2418427A1/en not_active Abandoned
- 2003-02-10 JP JP2003032479A patent/JP2003237797A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2600627A1 (en) * | 1986-06-27 | 1987-12-31 | Gieza Paul | Packaging bag for loose products |
JPH07314587A (en) * | 1994-05-27 | 1995-12-05 | Hosokawa Yoko:Kk | Manufacture of bag |
FR2744699A1 (en) * | 1996-02-13 | 1997-08-14 | Hosokawa Yoko Kk | BAG AND METHOD FOR MANUFACTURING SUCH BAG |
GB2317159A (en) * | 1996-02-13 | 1998-03-18 | Hosokawa Yoko Kk | Closing one or both ends of a generally tubular bag |
US6334710B1 (en) * | 1997-08-14 | 2002-01-01 | Hosokawa Yoko Co., Ltd. | Self-standing container |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04 30 April 1996 (1996-04-30) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2876084A1 (en) * | 2004-10-06 | 2006-04-07 | Brink S France Sa | Package for transporting object e.g. bank note, has propulsion pockets propelling package by compressed air of pneumatic system, sheets forming pockets and fixed on bag, and gusset provided at end of bag opposite to bag`s opening |
US8790230B2 (en) | 2009-07-22 | 2014-07-29 | Anapo Plastics, Llc | Method of manufacturing a stand-up bag |
Also Published As
Publication number | Publication date |
---|---|
US20030152298A1 (en) | 2003-08-14 |
ITMI20020291A1 (en) | 2003-08-14 |
JP2003237797A (en) | 2003-08-27 |
ITMI20020291A0 (en) | 2002-02-14 |
CA2418427A1 (en) | 2003-08-14 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO |
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AKX | Designation fees paid | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20040228 |