GB2409186A - Bag gusset provided with reinforcing weld - Google Patents

Bag gusset provided with reinforcing weld Download PDF

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Publication number
GB2409186A
GB2409186A GB0426148A GB0426148A GB2409186A GB 2409186 A GB2409186 A GB 2409186A GB 0426148 A GB0426148 A GB 0426148A GB 0426148 A GB0426148 A GB 0426148A GB 2409186 A GB2409186 A GB 2409186A
Authority
GB
United Kingdom
Prior art keywords
web
webs
overlapping
panels
guide plate
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.)
Granted
Application number
GB0426148A
Other versions
GB2409186B (en
GB0426148D0 (en
Inventor
Eamon Martin
Garry Moore
Aidan O'brien
Andrew Bourke
Shane Healy
Paul Conlon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STERIPACK MEDICAL Ltd
Original Assignee
STERIPACK MEDICAL Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by STERIPACK MEDICAL Ltd filed Critical STERIPACK MEDICAL Ltd
Publication of GB0426148D0 publication Critical patent/GB0426148D0/en
Publication of GB2409186A publication Critical patent/GB2409186A/en
Application granted granted Critical
Publication of GB2409186B publication Critical patent/GB2409186B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • 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
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • 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
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0014—Flexible containers made from webs by folding webs longitudinally having their openings facing transversally to the direction of movement
    • 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
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores

Abstract

Bag formation process in which after a main welding process 50, such as at which sides the bag are welded, an additional reinforcing weld 46 is provided circa a side of the bag proximate a bottom gusset of the bag, such as by additional welding station 60.

Description

24oo 1486 - 1 "Process for manufacturing packaging pouches" This invention
relates to apparatus and a process for manufacturing packaging pouches, and In particular packaging pouches of plastics material used in medical applications.
Sealed sterile plastics pouches are widely used in medical applications for maintaining equipment in sterile cor'dition prior to use for example, or for collecting or delivering fluids from or to a patient. Simple pouches may comprise front and back thermopiastc panels heat welded together about side scams for example. A difficulty arises in achieving a good seal at seams on pouches where the profile of the pouch is uneven, that is additional layers of material are provided at certain parts of the seam due to a gusset fold for example. To enable such pouches to be used in medical applications it is essential to be able to provide a secure seal throughout the seam, otherwise the sterility within the pouch could be compromised in use with disastrous results.
The present invention is directed towards overcoming this problem.
According to the invention there is provided a process for manufacturing a pouch Including: a .
forming a pouch assembly of a number of overlapping panels having an uneven transverse profile, :. 25 said uneven transverse profile comprising a thin profile portion and a thick profile portion, the thin proflie portion having two overlapping main panels, at least one of 3 0 which is of thermoplastics material, said thick profile portion having an additional pair of overlapping panels sandwiched between portion of said main panels, - 2 - crimping the thick profile portion, at a main welding station clamping the panels to-tether between a complementary pair of die parts and heating said die parts to a desired welding temperature for applying a thermoseal for bonding the panels together by head welding the panels together in a preselected seam configuration to form the pouch, and at a reinforcing welding station applying an additional reinforcing weld to the thick profile portion of tho scam.
In one embodiment of the invention the process includes the steps: leading a thermoplastics web from a supply reel, folding the web in half about a longitudinal axis of the web to form two overlapping main panels with a common folded edge extending along one side of the web, a. 20 forming a gusset along the folded edge of the web with four overlapping -ea panels by leading the web over three overlapping guide platesl namely a top guide plate, a middle guide plate and a bottom guide plate, drawing the main panels over outer faces of the top guide plate and the bottom guide plate, the middle guide plate pushing the folded edge inwardly between the top guide -.
2 5 plate and the bottom guide plate to form the gusset, and A. -e applying the reinforcing weld across the gusseted portion of the web.
In another embodiment the process includes the steps: leading a pair of thermoplastics webs and a filter web from supply reels, folding the filter web in half about a longitudinal axis of the filter web, - 3 - forming the pouch assembly by overlapping the webs with the folded filLer web mounted between the two outer thermoplastics webs, that portion of the assembly where only the two thermoplastics webs overlap forming the thin profile portion of two panel layers and that portion of the assembly where all the vvebs overlap forming the thick profile portion of four panel layers, and applying the reinforcing weld across the thick profile portion of the overlapping webs Inciting the filter webs.
In another embodiment the process includes adjoining each side edge of the filter web to an adjacent outer thermoplastic. web by longitudinal seals at a longitudinal soaring station for mounting the filter web between the two outer thermoplastics webs.
In a further embodiment the longitudinal sealing station is located upstream of the main welding station.
In another embodiment the process includes applying the reinforcing weld to the thick 2 0 profile portion downstream of the main welding station. e&. e *,.
In another embodiment the process includes feeding the overlapping panels between -,2 a pair of stepped nip rollers located upstream of the main welding station, Said nip rollers having a stepped web receiving gap between the nip rollers, with a narrow spacing portion between the rollers for receiving the thin profile portion and a wide 2. spacing portion between the rollers for receiving the thick profile portion. ad e.
1,, another aspect the Invention provides pouches manufactured according to the process. An
The invention will be more clearly understood by the following description of some embodiments thereof, given by way of example only, with reference to tho accompanying drawings in which; Fig 1 is a schematic perspective view illustrating of a pouch manufacturing apparatus and production line according to the invention, fig. 2 is a schematic perspective view illustrating a folding section of the apparatus, Fig. 3 is a detail perspective view of a folded web guide forming portion of the apparatus; JO Fig. 4 is a sectional olevational view of the folded web guiLIu Shown In Flg. 3; Fig. 5 is a perspective view of a pouch formed by the process of the invention; Figs. 6, 7 and 8 illustrate sequential steps in forming filter pouches according to another embodiment of the invention; and Fig. 9 Is a perspective view of a filter pouch formed by the process of the invention.
. 20 Referring to the drawings, there is Illustrated a pouch manufacturing apparatus according to the invention indicated generally by the reference numeral 1. The " apparatus 1 has a ground engaging support frame, which has been omitted from the en drawings for the sake of clarity, on which the various parts of the apparatus are mounted. - .
25 . . A supply reel 10 (Fig. 2) of thermoplastic material is mounted on a rotatable support . spindle 11. A web 12 of the plastics material is drawn from the reel 10 and delivered through a pair of nip rollers 13 to a web tensioner 14. I he web tensioner 14 has an upper sot of fixed rollers to and a lower set of movable rollers 16 which are movable 3 0 towards and away from the fixed rollers 15 to adjust the tension applied to the welt 12 to maintain a required tension and to convert the web 12 from continuous feed from the reel 10 to incremental feed downstream of the tensioner 14.
Downstream of the tensioner 14 the web 12 is delivered past an ease guide 17. The s - edge guide 17 aligns the woh 12 for delivery through a set of turning rollers 18 which turns the web 12 through 90 from a substantially horizontal orientation to a substantially vertical orientation for feeding into a folding station 19.
At the folding station 19 the web 12 is folded in half about a longitudinal axis by being drawn over a tapered folding guide 20 which narrows towards the downstream end.
A quest fold 2a Is formed along one edge of the folded web 12. The gusset fold 22 is formed by feeding the web 12 through an associated set of guide plates 25. The n guide plates 25 comprise three overlapping guide plates, namely a top guide plate 26, a middle guide plate 27 and a bottom guide plate 28. The main folded panels 31, 32 of the web 12 are drawn over outer faces 33, .24 of the top guide plate 26 and bottom guide plate 28, the middle guide plate 27 pushing the folded edge 38 inwardly between the top guide plate 26 and bottom guide plate 28 to form the gusset fold 22.
Downstream of the guide plates 25 a gusset edge 29 of the web t2 passes beneath a creasing plate 30 which creases the folded gusset edge 29 of the web 12 to form a creased gusset.
The guccotod web 12 then passes througl' rrip rollers 35 and a second tensioner 36 2 0 of similar construction to the first tensioner 14, :.
An edge guide 40 aligns and feeds the gusseted web 12 between a pair of nip rollers . 42. The nip rollers 42 have a stepped configuration to accommodate the extra two layers of web film along the gusset edge 29. At this stage there are four layers of 2 5 web film at the gusset edge 29 and only two layers across the remainder of the web Bee..
12. The nip rollers 42 have a stepped web receiving gap between the nip rollers 42 with a narrow spacing portion between the rollers 42 for receiving the thin profile .e portion (havilly two layers of web film) and a wide spacing portion between the rollers 42 for receiving the Thick profile portion (having four layers of web film).
The web 12 is then delivered to a main welding station 50. At the main welding station 50 the web 12 is clamped between die parts 52 which are hearted for formin main transverse side seam welds In the web 12 defining the pouches. - 6 -
Downstream of the main weld station 50 the web 12 of pouches may be delivered to a reinforcing welding station 60 at which a reinforcing weld is provided at the gusset edge 29 of the web 12.
The web 12 is then delivered to a guillotine 65 which cuts away a gusseted pouch 70 from a free end of the web 12. A number of the gusseted pouches 70 are stacked and sent for packaging.
Fig. 5 shows the pouch 70 having a pair of overlapping main panels 71, 72 with the grs.sF,t fold 22 at an inner end 73 of tho pouch 70. Welded side Harris 74, 75 extend between the inner end 73 and a free outer end 76 of the pouch 70 which is left open to receive an article before a thermoseal is applied along the outer end 76 also to seal the pouch 70. It will be noted that the reinforcing welds 46 are coincident with the normal side seam welds 74, 75 and extend across any beyond the inner gusseted portion of the pouch 70.
Fteferring now to Figs. 6 to 9 the manufacturing process for forming a filter pouch 80 using the apparatus of the invention will be described. A pair of thermoplastics webs 81, 82 and an intermediate filter web 83 are led from supply reels. I he filter web 83 2 0 is folded in half about a longitudinal axis of the filter web as shown in Fig. 6. A pouch assembly 84 is formed by overlapping the webs 81, 82, 83 with the folded filter web 83 mounted between the two outer thermoplastics webs 81, 82. The pair of outer thermoplastics webs 81, 82 with the associated folded filter web 83 therebetween are delivered to a longitudinal sealing station 39 upstream of the main welding station 50.
2 5 At the longitudinal sealing station 39 top and bottom longitudinal sealing welds 90 .e..
are applied between an outer face of free edges 91, 92 of each fold of the filter web 83 and the adjacent outer thermoplastics web 81, 82 to seal each edge 91, 92 of I..
the filter web 83 with the outer thermoplastics webs 81, 82. The overlapping webs . 81, 82, 83 forming the pouch assembly 84 are then delivered to the main welding station 50 At the main welding station 50 a transverse side seam weld 87 its applied across the webs 81, 82, 83 and longitudinal side seams 88 are applied down each side of the overlapping thermoplastics webs 81, 82. 7 -
Downstream of the main welding station 50 a reinforcing weld 86 is applied across the thick profile portion of the overlapping webs 81, 82, 83 where the two outer thermoplastics webs 81, 82 and the intermediate filter web 83 overlap. This reinforcing weld 86 extends across and proJocts outwardly of each side of the thick pronto portion of the overlapping webs 81, 82, 83.
When the pouch 80 is cut away from the web by the guilluti'u 6S it has an open end 89 opposite the end with the transverse seal 87.
The invention is not limited to the embodiments hereinbefore described which may be varied in both construction and detail within the scope of the appended claims. ë.e I: e.e .. e.. . : ë .. - 8

Claims (1)

1. A process for manufacturing a pouch including: s forming a pouch assembly of a number of overlapping panels having an uneven transverse profile, said uneven transverse profile comprising a thin profile portion and a thick profile portion, the thin profile portion having two overlapping main panels, at least one of which is of thermoplastics material, said thick profile portion having an additional pair of overlapping panels sandwiched between portion of said main panels, crimping the thick profile portion, at a main welding station clamping the panels together between a .. complementary pair of die parts and heating said die parts to a ë desired welding temperature for applying a thermoseal for bonding the . . panels together by heat welding the panels together in a preselected seam configuration to form the pouch, and ..-.. a
at a reinforcing welding station a,oplying an additional reinforcing weld to the thick profile portion of the seam. ... .
2. A process as claimed in claim 1 which includes the steps: leading a thermoplastics web from a supply reel, folding the web in half about a longitudinal axis of the web to form two overlapping main panels with a Common folded edge extending along 9 _ one side of the web, forming a gusset along the folded edge of the web with four overlapping panels by leading the web over three overlapping guide plates namely a top guide plate, a middle guide plate and a bottom guide plate, drawing the main panels over outer faces of the top guide plate and the bottom guide plate, the middle guide plate pushing the folded edge inwardly between the top guide plate and the bottom guide plate to form the gusset, and applying the reinforcing weld across the gusseted portion of the web.
3. A process as claimed in claim 1, including the steps: leading a pair of thermoplastics webs and a filter web from supply reels, folding the filter web in half about a longitudinal axis of the filter web, 2 0 forming the pouch assembly by overlapping the webs with the folded .. filter web mounted between tho two outer thermoplastics webs, that A. portion of the assembly where only the two thermoplastics webs ..
overlap forming the thin profile portion of two panel layers ant! that : portion of the assembly where all the webs overlap forming the thick 5 profile portion of four panel layers, and . applying the reinforcing weld across the thick profile portion of the overlapping webs including the fitter webs. .
A. process as claimed in claim 3 whuruir' the process Includes Jonmg each side edge of the filter web to an adjacent outer thermoplastics web by longitudinal seals at a Inngiturlinal sealing station for mounting the filter web between the two outer thermoplastics webs.
A process as claimed in claim 4 wherein the longitudinal sealing station is located upstream of the main welding station.
6. A process as claimed in any preceding claim wherein the process includes applying the reinforcing weld to the thick profile portion downstream of the main welding station.
7. A process as claimed in any preceding claim wherein the process includes feeding the overlapping panels between a pair of stepped nip rollers located upstream of the main welding station, said nip rollers having a stepped web receiving gap between the nip rollers, with a narrow spacing portion between the nip rollers for receiving the thin profile portion and a wide spacing portion between the nip rollers for receiving the thick profile portion.
8. A process for manufacturing a pouch substantially as hereinbefore described with reference to the accompanying drawings.
9. A pouch whenever manufactured by the process as claimed in any preceding cluing. 2G :-e . e. ... ..e I--: . I. ... C.. In
GB0426148A 2003-11-28 2004-11-29 Process for manufacturing packaging pouches Expired - Fee Related GB2409186B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE20030895A IES20030895A2 (en) 2003-11-28 2003-11-28 Process for manufacturing packaging pouches

Publications (3)

Publication Number Publication Date
GB0426148D0 GB0426148D0 (en) 2005-01-05
GB2409186A true GB2409186A (en) 2005-06-22
GB2409186B GB2409186B (en) 2007-01-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB0426148A Expired - Fee Related GB2409186B (en) 2003-11-28 2004-11-29 Process for manufacturing packaging pouches

Country Status (2)

Country Link
GB (1) GB2409186B (en)
IE (1) IES20030895A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220402636A1 (en) * 2021-06-17 2022-12-22 Pactiv Evergreen Inc. Multilayer paperboard pouch and method of making the same using conventional bag-making equipment (cbme)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047199A (en) * 1979-03-30 1980-11-26 Union Carbide Corp Reinforced gusseted bag

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047199A (en) * 1979-03-30 1980-11-26 Union Carbide Corp Reinforced gusseted bag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220402636A1 (en) * 2021-06-17 2022-12-22 Pactiv Evergreen Inc. Multilayer paperboard pouch and method of making the same using conventional bag-making equipment (cbme)
US11827397B2 (en) * 2021-06-17 2023-11-28 Evergreen Packaging Llc Multilayer paperboard pouch and method of making the same using conventional bag-making equipment (CBME)

Also Published As

Publication number Publication date
GB2409186B (en) 2007-01-10
GB0426148D0 (en) 2005-01-05
IE20040796A1 (en) 2005-06-01
IES20030895A2 (en) 2005-05-18

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20161129