EP1442980B1 - Device and method for manufacturing reclosable packagings - Google Patents
Device and method for manufacturing reclosable packagings Download PDFInfo
- Publication number
- EP1442980B1 EP1442980B1 EP04075028A EP04075028A EP1442980B1 EP 1442980 B1 EP1442980 B1 EP 1442980B1 EP 04075028 A EP04075028 A EP 04075028A EP 04075028 A EP04075028 A EP 04075028A EP 1442980 B1 EP1442980 B1 EP 1442980B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- fill
- longitudinal
- overlap
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000007789 sealing Methods 0.000 claims abstract description 90
- 239000011888 foil Substances 0.000 claims abstract description 66
- 239000000463 material Substances 0.000 claims abstract description 32
- 230000001131 transforming effect Effects 0.000 claims abstract 2
- 239000000853 adhesive Substances 0.000 claims description 24
- 230000001070 adhesive effect Effects 0.000 claims description 24
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000002390 adhesive tape Substances 0.000 claims description 8
- 235000009508 confectionery Nutrition 0.000 claims description 5
- 240000008415 Lactuca sativa Species 0.000 claims description 4
- 235000012045 salad Nutrition 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000011345 viscous material Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 15
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/04—Applying separate sealing or securing members, e.g. clips
- B65B51/06—Applying adhesive tape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
- B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
- B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
- B65B9/2014—Tube advancing means
- B65B9/2028—Rollers or belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
- B65B9/2042—Means for altering the cross-section of the tube filling opening prior to transversal sealing, e.g. tube spreading devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
- B65B9/213—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles the web having intermittent motion
-
- 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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B2220/00—Specific aspects of the packaging operation
- B65B2220/12—Creating additional longitudinal welds on horizontal or vertical form fill seal [FFS] machines for stiffening packages or for creating package edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
- B65B59/04—Machines constructed with readily-detachable units or assemblies, e.g. to facilitate maintenance
Definitions
- the invention relates to a device for making bag-shaped packagings from a web of sheet material, such as synthetic foil, for loose products that may or may not be packaged in groups, such as sweets, powdered or granular products, such as ground cheese or flour or viscous products, such as salads. Below products are referred to in general, which therefore may have any given shape or consistency.
- the invention furthermore relates to such a method.
- the invention further relates to a reclosable, bag-shaped packaging for said products.
- the bag is formed from a sheet of foil material and has a front side and a rear side which at the side edges are sealed together. The material of the rear side continues over the upper side and forms an overlap at the front side.
- the foil material has an outer layer which is of a different synthetic material than the inner layer. At the location of the overlap (that can be engaged by the hand) its inner layer is attached on the outer layer of the front side by means of a severable seal.
- On the outer layer of the front side a strip of doublesided adhesive tape may be attached, which at the outer side has been provided with a removable protective strip. By removing the protective strip after opening the bag, during which the severable seal is severed, the strip of adhesive tape forms a sealing that can be opened and closed several times.
- the bag may be provided with an inwardly folded bottom area, in order to offer an increase of filling volume of the bag by unfolding.
- the filled bag can be put straight up, but then lacks sufficient stability to remain positively standing up, and may topple over. A shopkeeper will therefore be inclined to put the bag down flat on its rear side, and stack the bags, which harms the presentation of the product.
- a form-fill-seal machine that is easy to adapt to the wanted packaging with an overlap that can be opened, and which machine can be substantially standard, particularly having transverse sealing jaws that are reciprocally moveable in a vertical plane perpendicular to the front side, as is usual in form-fill-seal machines -that may or may not be so-called continuously operative- (in continuously operative machines the transverse sealing jaws do not only move towards each other and away from each other again, but also up and down, in non-continuously operative machines the motion in the said vertical plane is merely direct according to a straight line towards each other and away from each other).
- the invention provides a form-fill-seal machine for making bag-shaped packagings for products, such as edible products, according to claim 1
- the asymmetrical position of the overlap realised with this machine makes it possible to place the longitudinal sealing means for the severable seal seam at one lateral side of the fill tube (as considered from the front side), as a result of which a condition has been met for (easily) changing the form-fill unit: after all no longitudinal sealing jaws need to be removed for taking out the form-fill unit from the front.
- a standard machine in which the transverse sealing jaws reciprocally move in a vertical plane perpendicular to the front side of the machine, can be used here, with only minor adjustment. The owner of such a standard machine is thus more easily enabled to make packagings having an overlap that can be opened.
- the machine is furthermore provided with second longitudinal sealing means positioned at a second side, at one lateral side of the form tube, as considered from the front side of the machine, opposite the first side, for forming at least one longitudinal seal in the foil tube.
- second longitudinal sealing means are provided that are positioned at either side of, preferably equidistanced from, the vertical plane of section. Also the longitudinal sealing means for the other side then allow an easy change of the form-fill unit.
- the form-fill unit at the second side is provided with two protruding form strips for forming longitudinal folds in the foil tube, wherein the second longitudinal sealing means are positioned for sealing the longitudinal folds.
- the second longitudinal sealing means may comprise an anvil/form member, that extends between both longitudinal folds for positioning them for sealing.
- the position of the first and/or second longitudinal sealing means is adjustable in a direction towards/away from the fill tube, so that the cross-section of the fill tube used at a certain moment can be adjusted to.
- the anvil/form member as well preferably forms an interchangeable part then.
- the form-fill unit is removably or detachably placed in the machine.
- the form/fill tube at the first side at the lower end is provided with a first protrusion, situated in or near the vertical plane of section and extending downwards, and which in horizontal direction is free from the remainder of the lower end of the fill tube.
- the protrusion forms a guide for the tube area at the first side, so that it is narrowed in order to end up crease-free between the transverse sealing jaws.
- the first protrusion is pen- or lip-shaped and narrow as a result.
- the first protrusion with its end smoothly extends beyond the profile of the fill tube, so that the narrowing of the tube is enhanced at that location.
- the form/fill tube at its lower end is furthermore provided with at least one second protrusion, which is at least situated at the second side and defines a recess with the first protrusion.
- the recess offers a certain room for the shape transformation, whereas the foil tube is guided and held there where such is necessary.
- the second protrusion forms a sharp guiding edge, as a result of which a self-orienting influence can be exerted on the bottom seal, particularly when the guiding edge is substantially oriented towards the bottom.
- the sharp edge only takes little space in transverse direction, as a result of which the area within the bottom seal is able to be tautened.
- two second protrusions are present, which extend on either side of the vertical plane of section and preferably keep an area free between them in which area a fold-maker is allowed to extend. In this way it is achieved that the said bottom area defined by the two bottom seals can be folded in smoothly, prior to the transverse sealing jaws being active on it.
- the two second protrusions may advantageously be connected to each other by a plate, for instance a V-shaped plate, which is forming a cavity for the inwardly folded bottom area to be made.
- the foil tube is pulled taut and slightly tapering in that direction, in order to ensure that the foil tube at said short side is not folded double when closing the transverse sealing jaws, but at the other short side a sufficient fill opening will each time remain present.
- the form-fill tube may have different cross-sectional shapes, for instance circular.
- the fill tube has a substantially rectangular cross-section, having the main sides substantially parallel to said vertical plane of section. It is noted that a rectangle also includes a flat cross-section, in which the long sides are buckled or flat bent.
- the first side of the form-fill tube is bent having a flat surface between bent transitions to the main sides.
- the machine is furthermore provided with means for applying a strip of doublesided adhesive tape on the web of foil material in the area of the intended overlap.
- the first longitudinal sealing means are preferably positioned for arranging the severable longitudinal seal at the side of the strip of doublesided adhesive that faces away from the outer longitudinal edge of the overlap.
- the form-fill unit is detachably arranged on the frame it can easily be replaced by another unit (possibly the original one of the machine), for instance a unit for forming regular, non-reclosable, cushion-shaped bag-shaped packagings only having one longitudinal seal for permanent sealing of the (in that case very short) overlap.
- the machine may be a standard machine adapted for the latter packagings, in which the transverse sealing jaws are moveable in a vertical plane perpendicular to the front side of the machine. Said standard machine can then simply be temporarily equipped for making the reclosable packagings, without parts, particularly the transverse sealing jaws, having to be rotated.
- the unit can also be replaced by a unit for comparable reclosable packagings of a larger cross-section.
- the means for arranging the severable seal may be positioned for arranging the severable seal at the side of the strip of doublesided adhesive facing away from the outer longitudinal edge of the overlap.
- the second longitudinal sealing means are positioned at the second short side of the form-fill tube.
- the first short side of the form-fill tube is bent having a flat surface between bent transitions to the main sides.
- the form-fill unit is detachably arranged on the frame, and/or the first longitudinal sealing means and/or the second longitudinal sealing means are detachably arranged on the frame, for easy adjustment to the desires regarding the shape of the packaging.
- the invention provides a method for making bag-shaped packagings for products, such as edible products, according to claim 14
- the foil web is supplied to the form shoulder eccentrically with respect to a centre plane of the fill tube, which is perpendicular to the front side, as a result of which the realisation of the overlap shifted to the lateral side of the fill tube is facilitated.
- an adhesive strip is applied for forming a closing means for the overlap on the packaging, which closing means can be used several times, preferably on the lower side of the foil web, in an edge area thereof.
- the adhesive strip is adhered in the overlap at the foil area of the overlap that is situated on the inner side.
- the tube is furthermore folded in an area at a distance from the overlap, preferably at a second side of the fill tube situated opposite the first side, for forming two fold areas extending in longitudinal direction which between them define a bottom area, wherein the web material at the location of the fold areas is sealed together for forming two bottom longitudinal seals.
- bottom area is also folded inwards by means of fold makers that are positioned immediately above and immediately below transverse sealing jaws, an inwardly folded bottom can be obtained without the transverse sealing creating creases there.
- the invention provides a packaging, for a mass of articles, such as sweets, viscous material, such as salad , according to claim 22
- Such a reclosable packaging is easy in use and prior to and after use can be placed straight up in a stable manner, particularly when presented for sale in a shop. The use of space thus remains limited to the bottom profile.
- the means that enable repeated opening and closing of the packaging are formed by a strip of doublesided adhesive, preferably provided with a detachable protective strip, in which the strip of adhesive preferably is permanently adhered to the first main side.
- the form-fill-seal machine 1 in figure 1 comprises a frame 2, on which the various parts of the machine have been arranged and on which operation and control means that are not further shown are also included.
- the frame 2 is provided with a stock roll 3 of a web F of foil material, which via a number of free-running circulating rollers 7 is passed upwards to a horizontal track.
- the foil may for instance be a known multi-layered foil having specifications OPP/OPA/PFP having respective thicknesses of z20/15/50 ⁇ m, available from Amcor, in Gent, Belgium.
- a stock roll 4 of doublesided adhesive tape 57 has been arranged.
- the doublesided adhesive tape 57 is provided with a protective sheet 57c, at the radial inside as considered on the roll.
- the adhesive tape 57 is passed upwards to end up against the lower side of the web F at the location of the roller 5.
- two rollers 5a, 5b are arranged, which guide the adhesive strip 57 and the web F, during continuous transport in the direction C.
- a form-fill unit 10 is removably/replaceably arranged on the frame 2.
- two foil drive units 80 are attached, which each comprise a frame 81 and a vacuum belt 82.
- the frame 81 forms a unity with a holder 83 which can be attached to two rods 84 attached in the frame 2 (figure 1 A).
- the distance between the holders 83 is adjustable with means that are not further shown.
- sealing station 70 having in absolute sense horizontally, in the direction G, synchronously perpendicular to the front side reciprocally movable transverse sealing jaws 71a, 71b.
- a fill chute 6 is also shown, for receiving small articles to be packaged, such a sweets, from the direction F.
- the form-fill unit 10 is further shown in the figures 1 A-E and 2A-D.
- the form-fill unit 10 has a frame 11, that can be suspended and attached to the frame 2 of the machine 1.
- the frame 11 comprises a bracket 12 which is formed as one unity with the girders 16, on which a support plate 15 is attached.
- On the support plate 15 an asymmetrical form shoulder 13 is attached, which will be further discussed.
- a fill tube 14 extends through the form shoulder 13, which fill tube 14 at the upper end, spaced apart above the form shoulder 13, is attached to the upper end of the bracket 12.
- Bracket 12, form shoulder 13 and fill tube 14 form one unity, that can be kept in stock in various embodiments and can be placed in the frame 2 when a certain bag shape has to be made.
- the girders 16 For attachment in the frame 2 the girders 16 have an inverted U-shape, in order to be able to be placed on placement pins 19a, which with ends 19 are permanently attached to the frame 2.
- the pins 19a have a length that corresponds to the length of the girders 16.
- the ends 19 form a stop for the girders 16, for correct placement.
- the tube 14 extends vertically through the body of the form shoulder 13, in a correspondingly shaped vertical passage 93 thereof.
- the collar surface 90 of the form shoulder 13 on the one hand slopes downwards with an inclined surface 91 into a narrowing lip 92, which runs to the left short side of the passage 93.
- Said edge 94 is also turned at the corner, running about the lip 92, and therewith defines a sideward opening 95 through which the edge area of the foil web F, which is to form an overlap, is able to move.
- the lip 92 extends to near the vertical main plane S.
- the fill tube 14 is accommodated with play in the passage 93, which is sufficient for movement of the foil web F, which is then transformed into a tube F', over the circumferential surface of the tube 14.
- the passage 93 is slightly broader, at the opposite short side much broader.
- the cross-section of the tube is flat rectangular, having a vertical main plane or plane of symmetry S.
- the one short side forms a flat surface at 44, which surface via bent corners 46 changes into flat main sides 41 and 42.
- the other short side has a flat surface 43, which in the area immediately below the shoulder 13 is provided with protruding longitudinal strips 45 in the extension of the sides 41, 42. Said strips 45 are only short considered in tube direction.
- each longitudinal sealing station 19 and 20 are arranged, which, as can be seen in the figures 1A-E, each comprise a girder 17, by which means they are attached in the holders 18, which holders 18 are permanent to the holders 83, which, as already mentioned, are adjustably attached to the frame 2.
- the mutual distance of the longitudinal sealing stations can thus be adjusted with the mutual distance of the belts 82.
- the one longitudinal sealing station 19 comprises an upright 21 mounted on a girder 17, on which girder a holder 22 is attached.
- pneumatic means that are not further shown are provided, by means of which the sealing head holder 23 attached thereon can be moved in horizontal direction towards the tube 14 and away from it.
- the sealing head holder 23 holds a longitudinal sealing head 23a, provided with longitudinal sealing surface 23b (figure 2B).
- the longitudinal sealing surface 23b is positioned to cooperate with flat surface 44, which then serves as counter surface or anvil, immediately adjacent to the plane S.
- a vertical plate 24 is attached to the rear side of the holder 22, on which plate a protective cover can be arranged.
- the other longitudinal sealing station 20 is designed double, and is operative in a direction perpendicular to the direction of the first longitudinal sealing station 19.
- an upright 26 is mounted, on which a horizontal mounting plate 31 is attached.
- a form member 32 is attached, which extends to near the short surface 43 of the tube 14, while leaving play for the web of foil F', and at the corners is provided with seal-rubber seal anvils 34, which are facing sidewards, perpendicular to the normal of the flat surface 44 situated on the other short side.
- the form member 32 is detachable from the plate 31 by means of screw handles 28b, in order to be replaced by a form member having another shape or set-up, to be used with another form tube.
- longitudinal sealing heads 37a are positioned, which are provided with longitudinal sealing surfaces 37 for cooperation with the said seal anvils 34.
- the longitudinal sealing heads 37a are attached on holders 37 which, in a manner comparable to the one of the holders 22, are attached on holders 27, in which pneumatic means that are not shown are included for reciprocally moving the sealing head holders 27, and thus the sealing heads 37.
- the holders 27 are detachably attached on the aforementioned mounting plate 31, by means of screw handles 28a.
- the screw knobs 28a (twice) and 28b are always provided in pairs.
- a vertical plate 29 is attached, on which said protective cover can be arranged.
- the position of the holders 27 in a direction parallel to the plate 31 is adjustable, see arrows.
- a pair of vertical guiding plates 30 is also attached on the holder 32, which are located at the short sides for the sealing heads 37 and are provided with parallel, vertical and flat portions 34 and with run-in strips 33 that converge with respect to each other.
- the plates 30 are situated at a short distance for the anvils 34 and are provided with a passage (not shown), for the sealing heads 37.
- the lower end of the tube 14 is shaped in a particular way, and namely particularly the lower end of the strip 44, which in the shape of a tapering lip 74 is bent concave and then convex again to the outside, extending beyond the profile of the tube 14 as it is above it.
- the tube 14 at its lower end is provided with a V-shaped guide 77 (figure 2E) oriented to the inside with its bottom, which guide has edges 78a,b that are placed slightly within the corners of the tube 14.
- the guide 77 is covered by a plate 79.
- an open space 76 is realised, which in this example, is upwardly limited by horizontal lower edge 75 of the main sides 41 and 42 of the tube 14.
- a fold maker 102a is positioned which is provided with an edge 103a, which fold maker 102a is plate-shaped and arranged at the end of a rod 101 a, which is adjustably accommodated in holder 100a which is permanent to the frame 2.
- a comparable fold maker 102b is positioned, arranged at the end of a pin 101 b, adjustably accommodated in holder 100b, and provided with a nose 103b having a run-out edge.
- the fold maker 102b is placed at vertical distance X below the fold maker 102a in order to make movement of the transverse sealing jaws 71 a-b in the direction G in between them possible.
- the holders 100a and 100b are reciprocally movable in a direction parallel to the pins 101 a and 101 b, in register with the motion of the transverse sealing jaws.
- a foil material in the form of a laminate, having for instance a polythene inner layer that will come to lie at the inner side of the bag and a polypropene outer layer that will come to lie at the outer side of the bag.
- the foil web is unwound from the stock roll 3 in the direction A, and runs upwards (F) via turn rollers 7, and then horizontally (C) over the roller 5 where the doublesided adhesive tape 57 is added, which originates from stock roll 4 rotating in the direction B. With the adhesive strip 57 attached at the lower side, the protective sheet 57c still below, the foil web F runs to form shoulder 13, and at that location is transformed into a tube shape corresponding to tube 14.
- the centre line of the foil web F that is transported in the direction C to the form shoulder 13 here lies staggered over a distance Y with respect to the vertical plane T through the centre of the tube 14 (perpendicular to plane S).
- the edge area provided with the adhesive strip 57 is brought a considerable distance, as considered in the drawing at the left-hand side, from the plane T, up to the left-hand side of the tube 14, to near the plane S.
- the overlap extends further to the main side 41 of the tube 14, which side faces the front side 8 of the machine 1.
- the doublesided adhesive strip 57 is present, its protective sheet 57c also situated at the outer side, so that at that location no adhesion to the inner surface of the overlap formed is effected.
- the strips 45 ensure two folds in the foil web F', for which the material originates from foil material present in the widened area situated there in the passage 93. Due to the strips 30 and the holder 32 with anvil surfaces 34, the two folds retain their flat shape.
- the tubular shape F' of the foil shown in figure 2B is secured by operating the longitudinal sealing stations 19 and 20, so that the longitudinal sealing head 23 in cooperation with the flat surface 44, by heat sealing forms a longitudinal seal between the inner surface of the overlap and the outer surface of the foil area situated beneath it, which foil area forms the edge area of the foil web F onto which the adhesive strip 57 has been arranged.
- the layer of polypropene is sealed to the layer of polythene here, which seal can be severed when opening the packaging to be made. Note that (figure 2B) the location of the seal is now situated adjacent to the plane S.
- the area near the longitudinal seam formed on the flat surface 44 is smoothly urged to the outside by the lip 74, in which the material of the foil that is necessary to that end is obtained by the recesses 76.
- the edges 78a,b keep the bottom edges 58a,b in their place and orient them such that they are parallel to the closing plane of the transverse sealing jaws.
- the fold maker 102a here extends in the V-space within the guide 77, in order to form an inwardly folded bottom area, in the bag yet to be made, without creases arising.
- the V-space is large enough for forming the inwardly folded bottom area.
- the foil tube F' When leaving the lower end of the tube 14 the foil tube F' is thus pulled slightly flatter in order to thus be engaged without creases by the transverse sealing jaws 71 a, 71 b moved towards each other in the direction G.
- the transverse sealing jaws 71 a, 71 b in which a cutting means has also been incorporated, here move between the both fold formers 102a,b and form an upper transverse seal of a previous packaging and a lower transverse seal for the next packaging.
- the product is introduced through the fill tube into the bag that lies on top and is still in open connection with the foil tube.
- the cutting means in the transverse sealing jaws 71 a, 71 b is activated, to separate a packaging.
- a bag 50 is shown, having a rear side 52 and a front side 51, in which the front side is attached to the overlap 53 at the upper edge by means of a longitudinal seal 56 in such a manner that it can be manually severed, which overlap is a continuation of the rear side 52, passing over the upper side 54 of the packaging 50.
- the doublesided adhesive strip 57 is positioned, which with the adhesive side 57b is adhered to the outer layer of the front side 51 and with the other adhesive side 57a is still covered by protective strip 57c.
- hand engagement part 61 is formed, having lower edge 62.
- transverse seals 64 formed by means of transverse sealing jaws 71 a,b are shown, which transverse seals, at the location of areas 65, 66 and 67, coincide with the seal 56, the adhesive strip 57 and the bottom seams 58a, 58b.
- areas 65, 66 and 67 coincide with the seal 56, the adhesive strip 57 and the bottom seams 58a, 58b.
- areas 68 the double folded bottom area 59 is sealed at its ends.
- the bag 50 can be placed straight up, that means with the lower edges 60a, 60b of the bottom seams 58a, 58b on a surface, wherein the overlap 53 is situated at the top, see figure 3C.
- the user takes the edge area 61 of the overlap 53, to pull it upwards and thus sever the seam 56.
- the user can remove the protective strip 57c and then adhere the overlap 53 to the adhesive layer 57a on the front side 51 of the bag 50.
- the adhesive selected for the adhesive strip 57 is suitable to adhere to both the inner layer and the outer layer.
- front side 51 is folded down, so that the inner side of that material is turned to the outside and then the longitudinal sealing head 23 makes an inside-inside seal, that can also be severable, in case suitable material is selected.
- an alternative fill tube shape 114 is shown, which in this case is circular.
- the fill tube 114 at the right-hand side may be provided with protrusions such as the aforementioned short protrusions 45, for preparing the formation of the bottom seal areas.
- protrusions such as the aforementioned short protrusions 45
- the sealing head for forming the severable seal is shown, in a position comparable to those of the previous figures, that means having the sealing surface 23b just adjacent to the plane of symmetry S.
- the transverse sealing jaws 71 a, b are schematically shown, which in the direction G can be moved towards and away from each other.
- the transverse sealing jaws 71 a, b are of a standard machine, possibly continuously operative, accommodated therein in a standard manner. They are symmetrical with respect to the plane of symmetry S of the fill tube 114.
- the attachment of the longitudinal sealing head 23 is, just like in the embodiment of the previous figures, situated at a lateral side thereof.
- the foil web F is again supplied eccentrically, having eccentricity Y between centre line U of the foil web F and the tube plane of symmetry T.
- the eccentric supply of the foil web is possible on standard machines, because the width of the supply rollers 7 and the like leaves room to that end, or its trestle can be moved in transverse direction.
- the edge area provided with the adhesive strip 57 may extend far to the left about the foil tube 14, approximately 90° past the plane of symmetry T.
- the severable closing seam can each time be arranged on the left-hand side near the plane of symmetry S, which is also near the closing surface of the transverse sealing jaws 71a, b at the side of the overlap.
- the possible bottom seals can be made at the opposite side.
- the transverse sealing jaws 71a, b can thus be maintained, and one can limit oneself to moving the wanted longitudinal sealing heads and the unit of form shoulder/ fill tube.
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Abstract
Description
- The invention relates to a device for making bag-shaped packagings from a web of sheet material, such as synthetic foil, for loose products that may or may not be packaged in groups, such as sweets, powdered or granular products, such as ground cheese or flour or viscous products, such as salads. Below products are referred to in general, which therefore may have any given shape or consistency. The invention furthermore relates to such a method. The invention further relates to a reclosable, bag-shaped packaging for said products.
- It is known for example from
EP 0 708 025 A1 to package sweets and such loose mass of goods in reclosable bags of foil material. The bag is formed from a sheet of foil material and has a front side and a rear side which at the side edges are sealed together. The material of the rear side continues over the upper side and forms an overlap at the front side. The foil material has an outer layer which is of a different synthetic material than the inner layer. At the location of the overlap (that can be engaged by the hand) its inner layer is attached on the outer layer of the front side by means of a severable seal. On the outer layer of the front side a strip of doublesided adhesive tape may be attached, which at the outer side has been provided with a removable protective strip. By removing the protective strip after opening the bag, during which the severable seal is severed, the strip of adhesive tape forms a sealing that can be opened and closed several times. - At the lower side the bag may be provided with an inwardly folded bottom area, in order to offer an increase of filling volume of the bag by unfolding.
- The filled bag can be put straight up, but then lacks sufficient stability to remain positively standing up, and may topple over. A shopkeeper will therefore be inclined to put the bag down flat on its rear side, and stack the bags, which harms the presentation of the product.
- Therefore there is a need for such a bag-shaped packaging that is able to stand straight up in a stable manner.
- There furthermore is a need for a form-fill-seal machine by which means such bag-shaped packagings can reliably and easily be made.
- There is furthermore a need for a form-fill-seal machine that is easy to adapt to the wanted packaging with an overlap that can be opened, and which machine can be substantially standard, particularly having transverse sealing jaws that are reciprocally moveable in a vertical plane perpendicular to the front side, as is usual in form-fill-seal machines -that may or may not be so-called continuously operative- (in continuously operative machines the transverse sealing jaws do not only move towards each other and away from each other again, but also up and down, in non-continuously operative machines the motion in the said vertical plane is merely direct according to a straight line towards each other and away from each other).
- There is furthermore a need for a method by which means such a bag-shaped packaging can reliably and easily be made.
- From one aspect the invention provides a form-fill-seal machine for making bag-shaped packagings for products, such as edible products, according to claim 1
- The asymmetrical position of the overlap realised with this machine makes it possible to place the longitudinal sealing means for the severable seal seam at one lateral side of the fill tube (as considered from the front side), as a result of which a condition has been met for (easily) changing the form-fill unit: after all no longitudinal sealing jaws need to be removed for taking out the form-fill unit from the front. Furthermore a standard machine, in which the transverse sealing jaws reciprocally move in a vertical plane perpendicular to the front side of the machine, can be used here, with only minor adjustment. The owner of such a standard machine is thus more easily enabled to make packagings having an overlap that can be opened.
- Preferably the machine is furthermore provided with second longitudinal sealing means positioned at a second side, at one lateral side of the form tube, as considered from the front side of the machine, opposite the first side, for forming at least one longitudinal seal in the foil tube. Preferably two second longitudinal sealing means are provided that are positioned at either side of, preferably equidistanced from, the vertical plane of section. Also the longitudinal sealing means for the other side then allow an easy change of the form-fill unit.
- Preferably the form-fill unit at the second side is provided with two protruding form strips for forming longitudinal folds in the foil tube, wherein the second longitudinal sealing means are positioned for sealing the longitudinal folds.
- In that way a stable, reclosable packaging can easily be obtained, which is able to remain standing straight up, both if filled with smaller grains and if filled with larger articles, such as for instance salad, also if only filled to a limited extent, in which the bottom longitudinal seams, just like the severable closing seal and the closing means are arranged running along with the process direction of the foil tube and in the ready packaging form a bottom stabilisation. Arranging the said seals may suffice here. The width of the manufactured bags can simply be changed by changing the frequency in arranging transverse seals. No or hardly any parts that depend on the bag shape or size need to be changed.
- The second longitudinal sealing means may comprise an anvil/form member, that extends between both longitudinal folds for positioning them for sealing.
- Preferably the position of the first and/or second longitudinal sealing means is adjustable in a direction towards/away from the fill tube, so that the cross-section of the fill tube used at a certain moment can be adjusted to. The anvil/form member as well preferably forms an interchangeable part then.
- Preferably the form-fill unit is removably or detachably placed in the machine.
- In a further development which is also applicable per se in other form-fill tubes, the form/fill tube at the first side at the lower end is provided with a first protrusion, situated in or near the vertical plane of section and extending downwards, and which in horizontal direction is free from the remainder of the lower end of the fill tube. The protrusion forms a guide for the tube area at the first side, so that it is narrowed in order to end up crease-free between the transverse sealing jaws. Because the fill tube wall is already interrupted there the foil tube is able to be smoothly subjected to the cross-section transformation. Preferably the first protrusion is pen- or lip-shaped and narrow as a result.
- Preferably the first protrusion with its end smoothly extends beyond the profile of the fill tube, so that the narrowing of the tube is enhanced at that location.
- It is furthermore preferred that the form/fill tube at its lower end is furthermore provided with at least one second protrusion, which is at least situated at the second side and defines a recess with the first protrusion. The recess offers a certain room for the shape transformation, whereas the foil tube is guided and held there where such is necessary.
- In a simple embodiment thereof, the second protrusion forms a sharp guiding edge, as a result of which a self-orienting influence can be exerted on the bottom seal, particularly when the guiding edge is substantially oriented towards the bottom. The sharp edge only takes little space in transverse direction, as a result of which the area within the bottom seal is able to be tautened.
- Preferably two second protrusions are present, which extend on either side of the vertical plane of section and preferably keep an area free between them in which area a fold-maker is allowed to extend. In this way it is achieved that the said bottom area defined by the two bottom seals can be folded in smoothly, prior to the transverse sealing jaws being active on it. The two second protrusions may advantageously be connected to each other by a plate, for instance a V-shaped plate, which is forming a cavity for the inwardly folded bottom area to be made.
- Thus, after sealing, when leaving in a direction parallel to the main sides, the foil tube is pulled taut and slightly tapering in that direction, in order to ensure that the foil tube at said short side is not folded double when closing the transverse sealing jaws, but at the other short side a sufficient fill opening will each time remain present.
- The form-fill tube may have different cross-sectional shapes, for instance circular. In one embodiment the fill tube has a substantially rectangular cross-section, having the main sides substantially parallel to said vertical plane of section. It is noted that a rectangle also includes a flat cross-section, in which the long sides are buckled or flat bent.
- It is preferred here that the first side of the form-fill tube is bent having a flat surface between bent transitions to the main sides.
- For forming a type of packaging, as discussed in the preamble, which is also reclosable, it is preferred that the machine is furthermore provided with means for applying a strip of doublesided adhesive tape on the web of foil material in the area of the intended overlap.
- Then, the first longitudinal sealing means are preferably positioned for arranging the severable longitudinal seal at the side of the strip of doublesided adhesive that faces away from the outer longitudinal edge of the overlap.
- In case the form-fill unit is detachably arranged on the frame it can easily be replaced by another unit (possibly the original one of the machine), for instance a unit for forming regular, non-reclosable, cushion-shaped bag-shaped packagings only having one longitudinal seal for permanent sealing of the (in that case very short) overlap. The machine may be a standard machine adapted for the latter packagings, in which the transverse sealing jaws are moveable in a vertical plane perpendicular to the front side of the machine. Said standard machine can then simply be temporarily equipped for making the reclosable packagings, without parts, particularly the transverse sealing jaws, having to be rotated. The unit can also be replaced by a unit for comparable reclosable packagings of a larger cross-section.
- With the machine as claimed the aforementioned packagings can easily be made, whereas a condition is provided for being able to choose the wanted location of overlap, seals and (re)closing means, depending on the type of bag to be made.
- For instance the means for arranging the severable seal may be positioned for arranging the severable seal at the side of the strip of doublesided adhesive facing away from the outer longitudinal edge of the overlap.
- Preferably the second longitudinal sealing means are positioned at the second short side of the form-fill tube.
- Preferably the first short side of the form-fill tube is bent having a flat surface between bent transitions to the main sides.
- Preferably the form-fill unit is detachably arranged on the frame, and/or the first longitudinal sealing means and/or the second longitudinal sealing means are detachably arranged on the frame, for easy adjustment to the desires regarding the shape of the packaging.
- From a further aspect the invention provides a method for making bag-shaped packagings for products, such as edible products, according to
claim 14 - Preferably the foil web is supplied to the form shoulder eccentrically with respect to a centre plane of the fill tube, which is perpendicular to the front side, as a result of which the realisation of the overlap shifted to the lateral side of the fill tube is facilitated.
- Preferably at the location of the overlap, in longitudinal direction of the tube an adhesive strip is applied for forming a closing means for the overlap on the packaging, which closing means can be used several times, preferably on the lower side of the foil web, in an edge area thereof.
- Preferably the adhesive strip is adhered in the overlap at the foil area of the overlap that is situated on the inner side.
- Preferably the tube is furthermore folded in an area at a distance from the overlap, preferably at a second side of the fill tube situated opposite the first side, for forming two fold areas extending in longitudinal direction which between them define a bottom area, wherein the web material at the location of the fold areas is sealed together for forming two bottom longitudinal seals.
- If the bottom area is also folded inwards by means of fold makers that are positioned immediately above and immediately below transverse sealing jaws, an inwardly folded bottom can be obtained without the transverse sealing creating creases there.
- Preferably exclusively said seals are arranged.
- Further advantageous embodiments of the method according to the invention are the subject of subclaims as attached.
- From a further aspect the invention provides a packaging, for a mass of articles, such as sweets, viscous material, such as salad , according to
claim 22 - Such a reclosable packaging is easy in use and prior to and after use can be placed straight up in a stable manner, particularly when presented for sale in a shop. The use of space thus remains limited to the bottom profile.
- Preferably the means that enable repeated opening and closing of the packaging are formed by a strip of doublesided adhesive, preferably provided with a detachable protective strip, in which the strip of adhesive preferably is permanently adhered to the first main side.
- The invention will be elucidated on the basis of an exemplary embodiment shown in the attached drawings, in which:
- Figure 1 shows a schematic front view of a form-fill-seal machine according to the invention;
- Figure 1A-E show respective perspective views of various sides of a form-fill unit for the machine of figure 1 and a schematic radial view on it, respectively;
- Figures 2A-E show some schematic cross-sections at the location of the planes of section IIA-D in figure 1E and IIE in figure 1D;
- Figure 2F shows a schematic horizontal cross-section of an embodiment of the machine according to the invention having a circular fill tube; and
- Figures 3A-C show a front view, a cross-section of a packaging according to the invention, however without filling, and a view of a filled packaging according to the invention.
- The form-fill-seal machine 1 in figure 1 comprises a frame 2, on which the various parts of the machine have been arranged and on which operation and control means that are not further shown are also included.
- At the right-hand side the frame 2 is provided with a
stock roll 3 of a web F of foil material, which via a number of free-running circulatingrollers 7 is passed upwards to a horizontal track. The foil may for instance be a known multi-layered foil having specifications OPP/OPA/PFP having respective thicknesses of z20/15/50 µm, available from Amcor, in Gent, Belgium. In the machine astock roll 4 of doublesidedadhesive tape 57 has been arranged. The doublesidedadhesive tape 57 is provided with aprotective sheet 57c, at the radial inside as considered on the roll. Theadhesive tape 57 is passed upwards to end up against the lower side of the web F at the location of theroller 5. Immediately downstream of theroller 5 tworollers adhesive strip 57 and the web F, during continuous transport in the direction C. - At the front side (the left-hand side in the drawing) of the machine 1 a form-
fill unit 10 is removably/replaceably arranged on the frame 2. On either side of theform unit 10, particularly itstube 14, twofoil drive units 80 are attached, which each comprise aframe 81 and avacuum belt 82. Theframe 81 forms a unity with aholder 83 which can be attached to tworods 84 attached in the frame 2 (figure 1 A). The distance between theholders 83 is adjustable with means that are not further shown. - Vertically below from it, there is a sealing
station 70, having in absolute sense horizontally, in the direction G, synchronously perpendicular to the front side reciprocally movabletransverse sealing jaws - At the front side of the machine 1
doors 8 that can be opened are furthermore provided, in order to get to the form-fill unit. At the indicated side of the machine 1 an operation panel 9 is furthermore shown. - On top of the form-fill unit 10 a
fill chute 6 is also shown, for receiving small articles to be packaged, such a sweets, from the direction F. - The form-
fill unit 10 is further shown in the figures 1 A-E and 2A-D. The form-fill unit 10 has aframe 11, that can be suspended and attached to the frame 2 of the machine 1. Theframe 11 comprises abracket 12 which is formed as one unity with thegirders 16, on which asupport plate 15 is attached. On thesupport plate 15 anasymmetrical form shoulder 13 is attached, which will be further discussed. Afill tube 14 extends through theform shoulder 13, which filltube 14 at the upper end, spaced apart above theform shoulder 13, is attached to the upper end of thebracket 12.Bracket 12,form shoulder 13 and filltube 14 form one unity, that can be kept in stock in various embodiments and can be placed in the frame 2 when a certain bag shape has to be made. For attachment in the frame 2 thegirders 16 have an inverted U-shape, in order to be able to be placed onplacement pins 19a, which with ends 19 are permanently attached to the frame 2. Thepins 19a have a length that corresponds to the length of thegirders 16. The ends 19 form a stop for thegirders 16, for correct placement. - On the plate 12 a
form shoulder 13 is attached, which, as can clearly be seen in the figures 1 A-E, is asymmetric. - As can be seen in figure 2A the
tube 14 extends vertically through the body of theform shoulder 13, in a correspondingly shapedvertical passage 93 thereof. Thecollar surface 90 of theform shoulder 13 on the one hand slopes downwards with aninclined surface 91 into a narrowinglip 92, which runs to the left short side of thepassage 93. Around it, on the other hand, extends the (vertical)straight end edge 94 of theform shoulder 13, which edge has anupper surface 90 that is horizontal. Saidedge 94 is also turned at the corner, running about thelip 92, and therewith defines asideward opening 95 through which the edge area of the foil web F, which is to form an overlap, is able to move. Thelip 92 extends to near the vertical main plane S. - The
fill tube 14 is accommodated with play in thepassage 93, which is sufficient for movement of the foil web F, which is then transformed into a tube F', over the circumferential surface of thetube 14. At the location oflip 92 thepassage 93 is slightly broader, at the opposite short side much broader. - As can be seen in figure 2C, the cross-section of the tube is flat rectangular, having a vertical main plane or plane of symmetry S. The one short side forms a flat surface at 44, which surface via
bent corners 46 changes into flatmain sides flat surface 43, which in the area immediately below theshoulder 13 is provided with protrudinglongitudinal strips 45 in the extension of thesides - Immediately below the
form shoulder 13 twolongitudinal sealing stations girder 17, by which means they are attached in theholders 18, whichholders 18 are permanent to theholders 83, which, as already mentioned, are adjustably attached to the frame 2. The mutual distance of the longitudinal sealing stations can thus be adjusted with the mutual distance of thebelts 82. - The one
longitudinal sealing station 19 comprises an upright 21 mounted on agirder 17, on which girder aholder 22 is attached. In theholder 22 pneumatic means that are not further shown are provided, by means of which the sealinghead holder 23 attached thereon can be moved in horizontal direction towards thetube 14 and away from it. The sealinghead holder 23 holds alongitudinal sealing head 23a, provided withlongitudinal sealing surface 23b (figure 2B). Thelongitudinal sealing surface 23b is positioned to cooperate withflat surface 44, which then serves as counter surface or anvil, immediately adjacent to the plane S. Avertical plate 24 is attached to the rear side of theholder 22, on which plate a protective cover can be arranged. - The other longitudinal sealing
station 20 is designed double, and is operative in a direction perpendicular to the direction of the first longitudinal sealingstation 19. On thecross girder 17 anupright 26 is mounted, on which a horizontal mountingplate 31 is attached. On the other side of the mounting plate 31 aform member 32 is attached, which extends to near theshort surface 43 of thetube 14, while leaving play for the web of foil F', and at the corners is provided with seal-rubber seal anvils 34, which are facing sidewards, perpendicular to the normal of theflat surface 44 situated on the other short side. Theform member 32 is detachable from theplate 31 by means of screw handles 28b, in order to be replaced by a form member having another shape or set-up, to be used with another form tube. - At the outer side of the
strips 30 longitudinal sealing heads 37a are positioned, which are provided with longitudinal sealing surfaces 37 for cooperation with the said seal anvils 34. - The longitudinal sealing heads 37a are attached on
holders 37 which, in a manner comparable to the one of theholders 22, are attached onholders 27, in which pneumatic means that are not shown are included for reciprocally moving the sealinghead holders 27, and thus the sealing heads 37. As can be seen in figure 2B theholders 27 are detachably attached on the aforementioned mountingplate 31, by means of screw handles 28a. As can be seen in figure 1 B thescrew knobs 28a (twice) and 28b are always provided in pairs. At the rear side of theholder 37 avertical plate 29 is attached, on which said protective cover can be arranged. The position of theholders 27 in a direction parallel to theplate 31 is adjustable, see arrows. - A pair of
vertical guiding plates 30 is also attached on theholder 32, which are located at the short sides for the sealing heads 37 and are provided with parallel, vertical andflat portions 34 and with run-instrips 33 that converge with respect to each other. Theplates 30 are situated at a short distance for theanvils 34 and are provided with a passage (not shown), for the sealing heads 37. - As can be seen in the figures 1 A-D the lower end of the
tube 14 is shaped in a particular way, and namely particularly the lower end of thestrip 44, which in the shape of a taperinglip 74 is bent concave and then convex again to the outside, extending beyond the profile of thetube 14 as it is above it. At the opposite short side thetube 14 at its lower end is provided with a V-shaped guide 77 (figure 2E) oriented to the inside with its bottom, which guide hasedges 78a,b that are placed slightly within the corners of thetube 14. At the upper side theguide 77 is covered by aplate 79. Between the guide and thelip 74 anopen space 76 is realised, which in this example, is upwardly limited by horizontallower edge 75 of themain sides tube 14. - Above the lower end of the guide 77 a
fold maker 102a is positioned which is provided with anedge 103a, which foldmaker 102a is plate-shaped and arranged at the end of arod 101 a, which is adjustably accommodated inholder 100a which is permanent to the frame 2. Below it acomparable fold maker 102b is positioned, arranged at the end of apin 101 b, adjustably accommodated inholder 100b, and provided with anose 103b having a run-out edge. Thefold maker 102b is placed at vertical distance X below thefold maker 102a in order to make movement of the transverse sealing jaws 71 a-b in the direction G in between them possible. Theholders pins - For making the reclosable packagings as shown in figures 3A and 3B use can be made of a foil material in the form of a laminate, having for instance a polythene inner layer that will come to lie at the inner side of the bag and a polypropene outer layer that will come to lie at the outer side of the bag.
- The foil web is unwound from the
stock roll 3 in the direction A, and runs upwards (F) viaturn rollers 7, and then horizontally (C) over theroller 5 where the doublesidedadhesive tape 57 is added, which originates fromstock roll 4 rotating in the direction B. With theadhesive strip 57 attached at the lower side, theprotective sheet 57c still below, the foil web F runs to formshoulder 13, and at that location is transformed into a tube shape corresponding totube 14. - As schematically shown in figure 2A the centre line of the foil web F that is transported in the direction C to the
form shoulder 13 here lies staggered over a distance Y with respect to the vertical plane T through the centre of the tube 14 (perpendicular to plane S). As a result when passing over theform shoulder 13 the edge area provided with theadhesive strip 57 is brought a considerable distance, as considered in the drawing at the left-hand side, from the plane T, up to the left-hand side of thetube 14, to near the plane S. - As indicated in figure 2B, the overlap extends further to the
main side 41 of thetube 14, which side faces thefront side 8 of the machine 1. At that location at its (at that moment) outer side, on the outer layer of polypropene, of the edge area of the foil web F, the doublesidedadhesive strip 57 is present, itsprotective sheet 57c also situated at the outer side, so that at that location no adhesion to the inner surface of the overlap formed is effected. - At the other short side the
strips 45 ensure two folds in the foil web F', for which the material originates from foil material present in the widened area situated there in thepassage 93. Due to thestrips 30 and theholder 32 with anvil surfaces 34, the two folds retain their flat shape. - The tubular shape F' of the foil shown in figure 2B, is secured by operating the
longitudinal sealing stations longitudinal sealing head 23 in cooperation with theflat surface 44, by heat sealing forms a longitudinal seal between the inner surface of the overlap and the outer surface of the foil area situated beneath it, which foil area forms the edge area of the foil web F onto which theadhesive strip 57 has been arranged. Thus the layer of polypropene is sealed to the layer of polythene here, which seal can be severed when opening the packaging to be made. Note that (figure 2B) the location of the seal is now situated adjacent to the plane S. - At the other short side sealing of the inner layer to the inner layer of foil F takes place, that means of polythene to polythene, by cooperation of the anvil surfaces 34 and the longitudinal sealing heads 37. As a result a permanent, firm
longitudinal seam 58a, b (see figures 3A,B) is formed. - At the lower end of the
tube 14 the area near the longitudinal seam formed on theflat surface 44 is smoothly urged to the outside by thelip 74, in which the material of the foil that is necessary to that end is obtained by therecesses 76. Theedges 78a,b keep thebottom edges 58a,b in their place and orient them such that they are parallel to the closing plane of the transverse sealing jaws. - The
fold maker 102a here extends in the V-space within theguide 77, in order to form an inwardly folded bottom area, in the bag yet to be made, without creases arising. The V-space is large enough for forming the inwardly folded bottom area. When thetransverse sealing jaws 71 a,b have been opened and the foil tube has been moved downwards by thevacuum belts 82 and after that the transverse sealing jaws have been brought towards each other again, thefold maker 102b prevents that material present in the bag that is below it and has to be sealed and separated now, would urge the inwardly folded bottom area of the next bag to the outside just prior to closing the transverse sealing jaws. - When leaving the lower end of the
tube 14 the foil tube F' is thus pulled slightly flatter in order to thus be engaged without creases by thetransverse sealing jaws transverse sealing jaws fold formers 102a,b and form an upper transverse seal of a previous packaging and a lower transverse seal for the next packaging. During transverse sealing the product is introduced through the fill tube into the bag that lies on top and is still in open connection with the foil tube. After sealing has been completed, the cutting means in thetransverse sealing jaws chute 6 and subsequently through the inside of thetube 14. Theplate 79 prevents that material ends up in the bottom areas to be made/made, which would otherwise render the sealing difficult. - Finally a bag according to figures 3A-C has been obtained, in which a
bag 50 is shown, having arear side 52 and afront side 51, in which the front side is attached to theoverlap 53 at the upper edge by means of alongitudinal seal 56 in such a manner that it can be manually severed, which overlap is a continuation of therear side 52, passing over theupper side 54 of thepackaging 50. Approximately halfway theoverlap 53 the doublesidedadhesive strip 57 is positioned, which with theadhesive side 57b is adhered to the outer layer of thefront side 51 and with the otheradhesive side 57a is still covered byprotective strip 57c. Below theadhesive strip 57hand engagement part 61 is formed, havinglower edge 62. - In the bottom area of the
bag 50 the portion indicated by 59, which has abutted theside 43 of thetube 14, is now folded double at the location of foldingline 63, in order to form an inwardly turned bottom area. In the lower edge at the location ofbottom seams sides - In figure 3A the
transverse seals 64 formed by means of transverse sealingjaws 71 a,b are shown, which transverse seals, at the location ofareas seal 56, theadhesive strip 57 and thebottom seams areas 68 the double foldedbottom area 59 is sealed at its ends. - In filled condition the
bag 50 can be placed straight up, that means with thelower edges bottom seams overlap 53 is situated at the top, see figure 3C. - For use the user takes the
edge area 61 of theoverlap 53, to pull it upwards and thus sever theseam 56. After taking the product out of thebag 50 the user can remove theprotective strip 57c and then adhere theoverlap 53 to theadhesive layer 57a on thefront side 51 of thebag 50. The adhesive selected for theadhesive strip 57 is suitable to adhere to both the inner layer and the outer layer. - It is noted that embodiments are also possible in which the
front side 51 is folded down, so that the inner side of that material is turned to the outside and then thelongitudinal sealing head 23 makes an inside-inside seal, that can also be severable, in case suitable material is selected. - In figure 2F an alternative
fill tube shape 114 is shown, which in this case is circular. Optionally thefill tube 114 at the right-hand side may be provided with protrusions such as the aforementionedshort protrusions 45, for preparing the formation of the bottom seal areas. For reasons of clarity this is further left out. Furthermore only the sealing head for forming the severable seal is shown, in a position comparable to those of the previous figures, that means having the sealingsurface 23b just adjacent to the plane of symmetry S. Furthermore, thetransverse sealing jaws 71 a, b are schematically shown, which in the direction G can be moved towards and away from each other. Thetransverse sealing jaws 71 a, b are of a standard machine, possibly continuously operative, accommodated therein in a standard manner. They are symmetrical with respect to the plane of symmetry S of thefill tube 114. The attachment of thelongitudinal sealing head 23 is, just like in the embodiment of the previous figures, situated at a lateral side thereof. - As can be seen, the foil web F is again supplied eccentrically, having eccentricity Y between centre line U of the foil web F and the tube plane of symmetry T. The eccentric supply of the foil web is possible on standard machines, because the width of the
supply rollers 7 and the like leaves room to that end, or its trestle can be moved in transverse direction. - As can be seen in figure 2F, in this case the edge area provided with the
adhesive strip 57 may extend far to the left about thefoil tube 14, approximately 90° past the plane of symmetry T. By means of the sealinghead 23 at the location of the start of the overlap a seal can be formed, which is situated just adjacent to the plane of symmetry S, so that there will be no particular difficulties in opening the packaging later. - With the asymmetrical form shoulder according to the invention and/or the eccentric supply of the foil web F the severable closing seam can each time be arranged on the left-hand side near the plane of symmetry S, which is also near the closing surface of the
transverse sealing jaws 71a, b at the side of the overlap. The possible bottom seals can be made at the opposite side. On a standard machine, thetransverse sealing jaws 71a, b can thus be maintained, and one can limit oneself to moving the wanted longitudinal sealing heads and the unit of form shoulder/ fill tube.
Claims (26)
- Form-fill-seal machine for making bag-shaped packagings for products, such as edible products, from a web of foil material, such as synthetic foil, the machine comprising a frame (2) having a stock of web of foil material and a supply of the web of foil material in flat condition, and a form-fill unit (10) positioned at a front side of the machine, wherein the form-fill unit comprises a form shoulder (13) for transforming the flat web of foil material into a foil tube as well as a form-fill tube (14) connected to the form shoulder provided with lateral and longitudinal sides, having a vertical main plane of section (S), in which the machine furthermore comprises transverse sealing jaws (71A, 71B) that are positioned below the lower end of the fill tube for forming transverse seals in the foil tube and which are reciprocally moveable in a vertical plane (T) perpendicular to the front side of the machine and the vertical main plane (S) of section parallel to the longitudinal sides, the form shoulder being asymmetrically shaped for forming an overlap (53) in the foil tube which extends to at least a short distance from or near the said vertical main plane of section, wherein the machine is characterized in, that it is furthermore provided with first longitudinal sealing means (23) that are positioned at a first lateral side of the form-fill tube (14), as considered from the front side of the machine, preferably at a short distance from or near the said vertical main plane of section, for forming a first, severable longitudinal seal (56) at the location of the overlap (53).
- Form-fill-seal machine according to claim 1, furthermore provided with second longitudinal sealing means positioned at a second side, at one lateral side of the form tube, as considered from the front side of the machine, opposite the first side, for forming at least one longitudinal seal in the foil tube.
- Form-fill-seal machine according to claim 2, wherein two longitudinal sealing means are provided that are positioned at either side of, preferably equidistanced from, the vertical plane of section, wherein preferably the form-fill unit at the second side is provided with two protruding form strips for forming longitudinal folds in the foil tube, wherein preferably the second longitudinal sealing means are positioned for sealing the longitudinal folds.
- Form-fill-seal machine according to claim 3, wherein second longitudinal sealing means comprise an anvil/form member, that extends between both longitudinal folds for positioning them for sealing.
- Form-fill-seal machine according to any one of the claims 1-4, wherein the position of the first and/or second longitudinal sealing means is adjustable in a direction towards/away from the fill tube.
- Form-fill-seal machine according to claim 4 and 5, wherein the anvil/form member forms an interchangeable part.
- Form-fill-seal machine according to any one of the preceding claims, wherein the form-fill unit is detachably placed in the machine.
- Form-fill-seal machine according to any one of the preceding claims, wherein the form/fill tube at the first side at the lower end is provided with a first protrusion, situated in or near the vertical plane of section and extending downwards, and which in horizontal direction is free from the remainder of the lower end of the fill tube, wherein preferably the first protrusion is pen- or lip-shaped.
- Form-fill-seal machine according to claim 8, wherein the first protrusion with its end extends beyond the profile of the fill tube.
- Form-fill-seal machine according to claim 8 or 9, wherein the form/fill tube at its lower end is furthermore provided with at least a second protrusion, which is at least situated at the second side and defines a recess with the first protrusion, wherein preferably the second protrusion forms a sharp guiding edge, particularly substantially oriented towards the bottom.
- Form-fill-seal machine according to claim 10, wherein two second protrusions are present, which extend on either side of the vertical plane of section and preferably keep an area free between them, in which area a fold-maker is able to extend, wherein the two second protrusions preferably are connected to each other by a plate, for instance a V-shaped plate, which is forming a cavity for the inwardly folded bottom area to be made.
- Form-fill-seal machine according to any one of the preceding claims, wherein the fill tube has a substantially rectangular cross-section, having the main sides substantially parallel to the vertical plane of section, wherein preferably the first side of the form and fill tube is bent having a flat surface between bent transitions to the main sides.
- Form-fill-seal machine according to any one of the preceding claims, characterized in, that it is furthermore provided with means for arranging a strip of doublesided adhesive tape on the web of foil material in the area of the intended overlap, wherein preferably the first longitudinal sealing means are positioned for arranging the severable longitudinal seal at the side of the strip of doublesided adhesive that faces away from the outer longitudinal edge of the overlap.
- Method for making bag-shaped packagings for products, such as edible products, in a form-fill-seal machine from a web of sheet material, such as synthetic foil, wherein the web of material is supplied in a flat condition to an asymmetrical form shoulder positioned at a front side of the machine and connected to a form-fill tube provided with lateral and longitudinal sides in order to be transformed there into a tube in which the longitudinal edges form an overlap, said lateral sides being parallel to a vertical centre plane of the fill tube which is perpendicular to the front side, wherein the overlap is formed eccentrically with respect to the centre plane of the fill tube, characterized in, that it extends up to the lateral side of the fill tube, wherein the overlap, at a distance from the outer longitudinal edge of the overlap, at said lateral side, is secured onto the tube by arranging a severable, closing seal in longitudinal direction of the tube, after which the tube is filled, sealed and closed by means of transverse seals extending perpendicularly to the tube and the centre plane.
- Method according to claim 14, wherein the foil web is supplied to the form shoulder eccentrically with respect to the centre plane of the fill tube, which is perpendicular to the front side
- Method according to any one of the claims 14 or 15, wherein the tube is furthermore folded inwards in an area at a distance from the overlap, preferably at a second side of the fill tube situated opposite the first side, for forming two fold areas extending in longitudinal direction which between them define a bottom area, wherein the web material at the location of the fold areas is sealed together for forming two bottom longitudinal seals, wherein preferably the bottom area is folded inwards by means of fold makers that are positioned immediately above and immediately below transverse sealing jaws, wherein preferably exclusively said seals are arranged.
- Method according to any one of the preceding claims, wherein for arranging closing means a strip is supplied in the in the longitudinal direction of the tube, which strip is provided with adhesive on both sides.
- Method according to claim 17, wherein the closing means is arranged situated at a distance from the outer longitudinal edge of the overlap which is smaller than the distance of the severable, closing seal to said edge.
- Method according to any of the preceding claims, wherein the transverse seals are arranged over the severable, closing seal and the closing means.
- Method according to any one of the preceding claims, wherein the tube is formed on a vertical form and fill tube of a form-fill-seal machine, wherein the form tube gives the tube a substantially rectangular cross-section, of which the one, first main side faces away from the machine and the other, second main side faces the machine, wherein the transverse seals are arranged by means of transverse sealing jaws which in a vertical plane are moved transverse to the plane of the both main sides, wherein preferably the overlap is arranged at the first main side.
- Method according to one of the preceding claims, characterized in, that at the location of the overlap, in longitudinal direction of the tube an adhesive strip is applied for forming a closing means for the overlap on the packaging
- Packaging for a mass of articles, such as sweets, viscous material, such as salad, wherein the packaging is bag-shaped and manufactured from a web of foil material which from a flat condition has been bent into a tube shape having an overlap (53) and after that in filled condition is cut into (tube) sections for separating the manufactured packaging, wherein the packaging at the cutting edges (68) of the section in question is sealed closed for forming side edges, wherein the packaging has two mains sides (51, 52) and a bottom area (55), which extends perpendicular to the side edges and forms two bottom edges (60a,60b) which between them define an inwardly folded bottom strip (63) and each with a connecting main side of the packaging form a sealed bottom seam (58a, 58b), characterized in, that the overlap extends from a main back side over a main front side and at a distance from its end edge is sealed to said main front side (51) by means of a closed but severable seal (56), and wherein the packaging at the location of the overlap is provided with an adhesive strip (57) that enables repeated opening and closing of the packaging.
- Packaging according to claim 22, wherein the bottom longitudinal seals and the transverse seals overlap each other in the corner areas that form the boundary of the inside of the packaging.
- Packaging according to claim 22 or 23, wherein the means that enable repeated opening and closing of the packaging are situated between the severable longitudinal seal and the outer longitudinal edge of the overlap.
- Packaging according to claim 22 - 24, wherein the means that enable repeated opening and closing of the packaging are formed by a strip of doublesided adhesive, preferably provided with a detachable protective strip.
- Packaging according to any one of the claims 22 - 25, wherein the foil material is a laminate having situated at both its outer sides respective first and second layers of different synthetic material, wherein at the location of the severable longitudinal seal the first material is attached to the second material.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1022307 | 2003-01-06 | ||
NL1022307 | 2003-01-06 | ||
NL1023151A NL1023151C2 (en) | 2003-01-06 | 2003-04-11 | Device and method for manufacturing resealable packages. |
NL1023151 | 2003-04-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1442980A1 EP1442980A1 (en) | 2004-08-04 |
EP1442980B1 true EP1442980B1 (en) | 2007-08-08 |
Family
ID=32658686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04075028A Expired - Lifetime EP1442980B1 (en) | 2003-01-06 | 2004-01-05 | Device and method for manufacturing reclosable packagings |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040154271A1 (en) |
EP (1) | EP1442980B1 (en) |
AT (1) | ATE369284T1 (en) |
DE (1) | DE602004007964T2 (en) |
ES (1) | ES2291805T3 (en) |
NL (1) | NL1023151C2 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7523597B2 (en) * | 2007-03-20 | 2009-04-28 | J & F Business, Inc. | Apparatus and method for mounting a bag former |
US8784289B2 (en) * | 2010-04-29 | 2014-07-22 | Illinois Tool Works Inc. | Process of forming a wide mouth gusseted bag with edge seals |
FR2962717B1 (en) * | 2010-07-13 | 2013-12-06 | Da Silva Simoes Carlos Alberto Rodrigues | DEVICE FOR MANUFACTURING BELLOW SACHET ON VERTICAL INSERT |
JP5918980B2 (en) * | 2011-02-04 | 2016-05-18 | 株式会社イシダ | Bag making and packaging machine |
US9840346B2 (en) * | 2013-11-01 | 2017-12-12 | Frito-Lay North America, Inc. | Method and apparatus for making a structurally resilient package |
US20160122061A1 (en) * | 2014-10-31 | 2016-05-05 | Radpak Sp z o.o. | Pouch forming machine with vertical jaw adjustment mechanism |
ITUA20162990A1 (en) * | 2016-04-28 | 2017-10-28 | Martini S R L | VERTICAL PACKAGING MACHINE |
JP6742625B2 (en) * | 2016-04-28 | 2020-08-19 | 株式会社イシダ | Packaging equipment |
US11230064B2 (en) * | 2017-02-28 | 2022-01-25 | Gea Food Solutions Weert B.V. | Inspection of a vertical flow-wrapper |
CN107380560B (en) * | 2017-07-10 | 2019-08-09 | 广州市易盈包装材料有限公司 | A kind of packing machine |
IT201700117793A1 (en) * | 2017-10-18 | 2019-04-18 | Mbp Srl | VERTICAL PACKAGING MACHINE WITH CARTRIDGE WELDING SYSTEM |
RU205322U1 (en) * | 2020-11-24 | 2021-07-08 | Общество с ограниченной ответственностью «БАРРАКУДА МЕХАНИКС» | PACKAGE HEAT WELDER WITH LONGITUDINAL OVERLAP SEAL |
RU207591U1 (en) * | 2021-09-09 | 2021-11-03 | Общество с ограниченной ответственностью «БАРРАКУДА МЕХАНИКС» | THREE-SEAM PACKAGE FORMER |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2657790A1 (en) * | 1976-12-21 | 1978-06-22 | Rovema Gmbh | HOSE BAG MACHINE |
AU585174B2 (en) * | 1987-01-27 | 1989-06-08 | Fujitokushu Shigyo Company Limited | Bag with zipper and its production method |
US5279098A (en) * | 1990-07-31 | 1994-01-18 | Ishida Scales Mfg. Co., Ltd. | Apparatus for and method of transverse sealing for a form-fill-seal packaging machine |
US5412924A (en) * | 1994-04-11 | 1995-05-09 | Minigrip, Inc. | Method of making reclosable plastic bags on a form, fill and seal machine |
US5425216A (en) * | 1994-06-06 | 1995-06-20 | Minigrip, Inc. | Method of making reclosable plastic bags on a form, fill and seal machine with open zipper profiles |
DE4431933A1 (en) * | 1994-09-08 | 1996-03-14 | Altamat Verpackungsmaschinen G | Vertical tubular bag packaging machine |
US5540035A (en) * | 1994-12-07 | 1996-07-30 | Kliklok Corporation | Continuous vertical form-fill-seal packaging machine with synchronized product clamp |
US5862652A (en) * | 1995-03-03 | 1999-01-26 | Rovema Packaging Machines, L.P. | Tubular bagging machine with an asymmetrical forming shoulder and tubular bags with an edge-side longitudinal seam |
US5551208A (en) * | 1995-05-31 | 1996-09-03 | Minigrip, Inc. | Method for applying zipper to film at tube on a form-fill-and-seal |
DE19801402A1 (en) * | 1998-01-16 | 1999-07-22 | Natec Reich Summer Gmbh Co Kg | Method and device for shaping and portioning a soft, pasty product |
US6088994A (en) * | 1998-01-20 | 2000-07-18 | Ishida Co., Ltd. | Packaging machine incorporating device for adjusting position for cutting bags |
DE19957891A1 (en) * | 1999-12-01 | 2001-06-07 | Rovema Gmbh | Tubular bag machine |
-
2003
- 2003-04-11 NL NL1023151A patent/NL1023151C2/en not_active IP Right Cessation
-
2004
- 2004-01-05 EP EP04075028A patent/EP1442980B1/en not_active Expired - Lifetime
- 2004-01-05 AT AT04075028T patent/ATE369284T1/en not_active IP Right Cessation
- 2004-01-05 ES ES04075028T patent/ES2291805T3/en not_active Expired - Lifetime
- 2004-01-05 DE DE602004007964T patent/DE602004007964T2/en not_active Expired - Fee Related
- 2004-01-05 US US10/750,906 patent/US20040154271A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
DE602004007964T2 (en) | 2008-04-24 |
ATE369284T1 (en) | 2007-08-15 |
US20040154271A1 (en) | 2004-08-12 |
EP1442980A1 (en) | 2004-08-04 |
DE602004007964D1 (en) | 2007-09-20 |
NL1023151C2 (en) | 2004-07-07 |
ES2291805T3 (en) | 2008-03-01 |
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