EP0060360A2 - Emballage refermable et méthode et dispositif pour sa fabrication - Google Patents

Emballage refermable et méthode et dispositif pour sa fabrication Download PDF

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Publication number
EP0060360A2
EP0060360A2 EP81303432A EP81303432A EP0060360A2 EP 0060360 A2 EP0060360 A2 EP 0060360A2 EP 81303432 A EP81303432 A EP 81303432A EP 81303432 A EP81303432 A EP 81303432A EP 0060360 A2 EP0060360 A2 EP 0060360A2
Authority
EP
European Patent Office
Prior art keywords
strip
bag
neck
adhesive
package
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP81303432A
Other languages
German (de)
English (en)
Other versions
EP0060360A3 (fr
Inventor
Klaus Peter Dieckow
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.)
HAMMEX MACHINES Ltd
Original Assignee
HAMMEX MACHINES 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
Priority claimed from US06/242,321 external-priority patent/US4426035A/en
Application filed by HAMMEX MACHINES Ltd filed Critical HAMMEX MACHINES Ltd
Publication of EP0060360A2 publication Critical patent/EP0060360A2/fr
Publication of EP0060360A3 publication Critical patent/EP0060360A3/fr
Withdrawn legal-status Critical Current

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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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
    • B65B7/06—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap
    • B65B7/08—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap and folding
    • 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

Definitions

  • This invention relates to a method and apparatus for the closing and sealing of packages using adhesive tape, and to a novel package produced thereby.
  • a number of products are commonly sold in bags, usually of paper, with a closure at their upper end. In many cases, where the contents of the package are used gradually and may deteriorate if exposed to the atmosphere for prolonged periods, it is desirable to make provision for reclosure of the package once opened.
  • a number of proposals have been made for reclosable bags of one sort or another, the most widely used package of this type having a deformable metal tie -(or "tin tie”) attached to one edge of the open top end of the bag, which may be closed and reclosed by repeatedly folding the bag end and securing the folds with the tin tie. This form of package has several disadvantages.
  • U.S. Patent No. 3,212,698 shows a bag with an adhesive sealing tab and a further non-setting adhesive coating to render the bag reclosable.
  • Other proposals, such as that contained in U.S. Patent No. 4,066,167 (Hanna et al) have provided a sealing strip attached to the bag which may be used to reseal the container after its original seal has been broken or removed. This of course complicates manufacture of the bag, and is rather clumsy in use since it requires the user to recover the strip from the bag and then apply it.
  • U.S. Patent No. 3,396,902 shows how the top of a bag may be specially shaped so as to ensure that a sealing strip does provide a good seal, but this proposal requires a special configuration of the top of the bag to ensure that all of the bag surfaces are exposed to the sealing strip.
  • U.S. Patent No. 3,439,866 discloses a bag closure arrangement in which a coupon or other material is folded into the neck of the bag during closure, for which purpose pressure sensitive adhesive may be utilized.
  • a disadvantage of this arrangement is that the coupon must be inserted as a separate step, the coupon is not visible until the package is opened; and the closure methods described fall in the categories already discussed above.
  • the Kuhnle arrangement does not provide any solution to the problem of applying packaging and like dates or codes, which hitherto have required the use of an additional printing or labelling step.
  • An object of the present invention is to provide an improved reclosable bag package, and a method and apparatus to produce such a package, which does not require the use of a special design of bag, which can be carried out at high speed, and which can readily be utilized to incorporate into the finished package printed material such as coupons or packaging dates or codes. It is a further object of the invention to provide a package which can be made particularly easy to reseal yet satisfactorily airtight and easily produced in an automated operation without the use of expensive clips or tin ties.
  • a package is formed by the steps of closing an open-topped bag filled with product by bringing together the upper portions of opposite side walls of the bag to form a closed upstanding neck, and applying to the neck a first strip bearing on its surface adjacent the bag a non-setting adhesive, said first strip being applied to the bag so as to adhere to both opposite side walls and close the bag, and is characterised in that the first strip also bears on its surface adjacent the bag a second non-adhesive coated strip extending parallel to the first strip and at least partially beneath and adhered to one lateral edge portion of said first strip to prevent the adherence of the adhesive to the bag along that edge and to provide a tab whereby the portion of the first strip adjacent the second strip may be peeled from at least one of the walls to which it adheres.
  • the second strip is introduced beneath the lower edge of the first strip and the strips are coterminous and extend the full width of the bag.
  • the second strip since it provides a tab by which a portion of the adhesive adhering to the bag may be pulled away therefrom, permits simple opening of the package, and this second strip may carry printed material such as a coupon and/or packaging data.
  • the detached portion of the first adhesive strip is readily pressed back into place to reclose the bag.
  • the closed top of the bag is trimmed to a predetermined level after closure, whereby upon a folding over of the top of the bag, the cut edges become displaced relative to one another, thus exposing each layer of the bag material to the adhesive surface of the first strip and ensuring a proper seal.
  • the invention also extends to a reclosable package comprising a filled bag formed at one end with a bag neck in which the bag walls are brought into parallel juxtaposition, the neck being folded upon itself at least once and a folded over portion of the neck being secured to the adjacent wall of the bag, the securement being provided by closure strip means extending parallel to the width of the folded over portion, which is characterised in that the closure strip means comprises a first flexible strip coated on one surface with a non-setting adhesive and a second flexible strip without a non-setting adhesive coating overlapping with and adhered to one marginal edge portion of the adhesive-coated surface of the first strip, the other marginal edge portion and an intermediate portion of the adhesive-coated surface of the first strip being adhered one to the folded-over portion of the neck and the other to a portion of the adjacent wall of the bag not overlaid by said folded-over portion.
  • the invention also extends to apparatus for forming a reclosable package from a filled open-topped bag, comprising means to transport successive bags along a path sequentially through a plurality of operating stations, said operating stations comprising in sequence a closing station having means to bring opposite bag walls of the open end of the bag into parallel juxtaposition to form a closed upstanding neck, and a sealing station comprising means to dispense a first strip having a non-setting adhesive coating on one surface, means to sever lengths from said first strip, and means to apply said lengths to the bag neck to adhere to both opposite walls and seal the bag, which is characterised in that the sealing station also includes means to apply a length of a second strip, without an adhesive coating, with the first strip, one edge of the second strip overlapping one marginal edge portion of the adhesive-coated surface of the first strip and the remainder of the adhesive-coated surface of the first strip adhered to both side walls of the bag.
  • open bags B filled to a desired level with a product are delivered by a conveyor 2 and a turntable 4 to successive carriers 6 mounted on an endless chain a driven along an oval path through a pleating station P, a cutting station C, a folding station F and a sealing station S, whereafter the sealed bag packages B5 are discharged onto a conveyor 10.
  • Loading of the bags B is effected by synchronized movement of the turntable 4 in conjunction with rails 12, whilst further rails 14 guide the sealed packages B5 off the carriers onto the conveyor 10.
  • Figure 1 includes perspective views showing packages Bl, B2, B3 and B4 at the stations P, C, F and S.
  • An additional belt 20 bears against the outer sides of the packages to help steady them in their progress through stations P and C.
  • station C and as best seen in Figure 2, the top portion or neck N of the bag is gripped between rubber 0-rings 22 on spring loaded idler rollers 24 which guide the top of the neck N into the nip of two interengaging cutting discs 26.
  • the discs shear off the top of the bag horizontally so that all of the top edges of the bag are at the same level as the bag enters the folding station F.
  • the folding station F is located peripherally of a carousel rotating on the same axis and at the same rate as a sprocket 30 engaging and supporting one end of the chain 8.
  • the carousel 28 comprises a polyginal plate 32 carrying at its corners guides 34 for the belts 16 and 18, and is concentric with a stationary cam drum 36 defining two peripheral cam tracks 38 and 40. Between each pair of guides 34, the plate 32 supports a folding mechanism 42 operated by cam followers 44, 46 engaging the cam tracks 38 and 40 so that the vertical undulations of the tracks are translated into movements of folding members 48 and 50 about the axes of shafts 52 and 54.
  • movement of the follower 44 is transmitted via a cross bar 56, racks 58 and pinions 60 to the shaft 52, whilst movements of the follower 46 are transmitted via a crank 62, a shaft 64 and bevel gears 66 and 68 to the shaft 54.
  • FIGs 4, 5 and 6 Successive operations resulting in the container B3 at the folding station F are illustrated in Figures 4, 5 and 6.
  • folding members 48 and 50 start in the positions shown in Figure 3 and in solid lines in Figure 4.
  • the member 50 then descends to the lower position shown in broken lines so that a turned up end portion holds the neck N of the bag against a spring loaded platen 70 whereupon the member 48 rotates anticlockwise from its position shown in Figure 4 so as to fold the top of the neck over the end portion of the member 50.
  • the member 48 then moves clockwise sufficiently to enable the member 50 to disengage from the neck and withdraw to its original position, whereupon the member 48 once again moves anticlockwise to the position shown in Figure 5 so that the top portion of the neck is tightly folded against the adjacent side wall W of the bag in the still upstanding portion of the neck N so as to form a sharp crease. Since the material of the bag is of finite thickness, and the pleats inserted at the pleating station P result in most of the neck having four thicknesses of paper, the folding will result in the originally adjacent cut edges produced at the cutting station C no longer being immediately adjacent. Instead, they will be fanned slightly apart as seen in Figure 5 and subsequent Figures. This has a significance discussed further below.
  • the folding member 48 retracts clockwise to its original position, allowing the creased top end N' of the package neck to spring back as shown in Figure 6.
  • the package next approaches the sealing station S, shown in more detail in Figure 7.
  • the neck N of the package is still at this point gripped between the belts 16 and 18.
  • the package engages sequentially two switches 72 and 74, which may be operated by feelers as shown, or by photoelectric means.
  • the switch 72 applies drive to sprockets driving two internally toothed belts 76 and 78 which advance a composite sealing strip means formed by a pair of strips 80 and 82 drawn from rolls 84 and 88. Both strips pass around part of the periphery of a sprocket 90 supporting the belt 76, this portion of the periphery being shown in section in Figure 8.
  • the first strip 80 carries a non-setting adhesive upon its outer surface as seen in Figure 8, and the strip 82 is fed onto the surface of the belt 76 on the sprocket 90 so that it overlaps the adhesive surface of the strip 80 and adheres thereto to form the composite strip means.
  • the belt 78 is narrower than the belt 76, and is disposed so as only to bear on the non-adhesive strip 82, thus enabling the combined strip means to be pinched between the belts and advanced without any contact with the adhesive surface of the strip 80.
  • the combined strip means Upon emerging from between the belts, the combined strip means is fed between the blades 92 of a shear and onto the surface of a roller 94 driven so that its peripheral speed is the same as that of the chain 8.
  • the roller 94 has on its peripheral surface a number of small orifices 96 connected by drillings 98 to a stationary semi-circular vacuum manifold 100, so that suction forces are developed at the surface of the roller on its right hand side as seen in Figure 7.
  • the combined strip means is thus drawn onto the surface of the roll 94 and is transported downwardly.
  • a solenoid 102 (see Figure 10) is energized.
  • the solenoid operates through a linkage 104 to actuate the shear blades 92 and sever the combined strip means.
  • the strip path is arranged so that it passes around a roller 108 and a tension arm 106.
  • the combined strip means is advanced by the belts 76 and 78, it is drawn from the loop formed by the tension arm 106 until a feeler 110 operates a limit switch 112 which in turn applies drive to the roller 108.
  • the roller 108 is of similar construction to roller 94, with a vacuum manifold 114, and so that the non-adhesive side of the combined strip means is sucked against the roller, and further strip is drawn from the roll 84 as the roller 108 rotates, so as to replenish the loop formed by the arm 106.
  • the belt 16 passes around a pulley 116 beneath the roller 94 and then around further pulleys 118 and 120 to raise its level so that a portion of the belt presses the creased over portion N' of the neck of the package towards the bottom of the roller 94 as shown in Figure 9.
  • the upright portion of the neck N is supported by a further belt 122 driven parallel to the chain 8 at the same speed and engaging the side wall of the bag further from the neck portion N'.
  • the strip means is released from the roller as it adheres to the package.
  • the upstanding portion of the neck passes between the belt 122 and a guide blade 124, and the creased over portion of the neck is then turned down by a rotating cam 126 as best seen in Figure 11.
  • a pressure roller 128 forms a nip with a roller 130 supporting the belt 122 (see Figure 12) so as to press the first strip 80 firmly into contact not only with the bent over portion N', but also the adjacent side wall W of the bag on the upstanding portion of the neck N, and intermediately the separated cut edges of the various layers of the bag as seen in Figure 12.
  • the completed package has a single fold at its neck N, secured and sealed by the strip 80.
  • the upper edge of the strip 82 extends beneath the lower edge of the strip 80, so that the strip 82 is secured to the strip 80, and the lower edge of the strip 80 is not secured to the bag.
  • the strip 82 may thus be used as a tab to lift the lower part of the strip 80 away from the neck of the bag, thus releasing the creased over portion N of the neck and allowing the bag to be opened.
  • the bag may be resealed simply by folding over the portion N' of the neck and pressing the lower portion of the strip 80 back into contact with the neck of the bag.
  • the strip 82 not only serves to facilitate opening and reclosure of the bag, but may also advantageously be used for various other purposes. Firstly, it may be used to carry packaging dates and codes, which may either be preprinted on the second strip 82 or applied by a suitable printing head positioned at an appropriate point along the strip path at station F. Secondly, the strip 82 may be formed as a line of coupons, which are thereby automatically applied to the packages. In this case, the strip 82 may be formed with a longitudinal perforation 134 or other line of weakness so that a coupon portion may be removed from the package and still leave a tab for opening the package.
  • the strip 82 may further serve to provide a virgin seal on the package.
  • a gluing head 130 may be provided, for example beneath the roller 94 (see Figure 9), to apply a row of dots or other pattern of hot melt adhesive 132 (see Figure 11) to the underside of the strip 82 so that the latter is locally adhered to the shoulder of the package B4 to provide a seal which must be broken before the package can be opened.
  • the neck of the bag is folded once, a similar seal may be applied to multiple folded bag necks although in this case the top edges of the bag will not be directly engaged by the strip means.
  • the non-adhesive strip could also be overlapped beneath the top edge rather than the bottom edge of the adhesive strip although this arrangement will usually be less satisfactory since on opening, the composite strip means will remain adhered to the main portion of the bag neck and will not assist in unfolding of the folded over portion of the bag neck. This unfolding facilitates opening of the bag since it automatically tends to limit the extent to which the composite strip means is pulled away from the bag during opening.
  • the strip 82 being non-adhesive or non-adhesive coated
  • this is intended to refer to non-setting adhesive coatings such as that applied to a conventional self-adhesive tape. It is not intended to rule out the application of setting adhesive, e.g. the hot melt adhesive 132, which does not interfere with the application of the second strip 82 during closure of the package nor prevent the strip 82 from being used as a tab to open the package.
EP81303432A 1981-03-10 1981-07-27 Emballage refermable et méthode et dispositif pour sa fabrication Withdrawn EP0060360A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US242321 1981-03-10
US06/242,321 US4426035A (en) 1980-03-13 1981-03-10 Packaging

Publications (2)

Publication Number Publication Date
EP0060360A2 true EP0060360A2 (fr) 1982-09-22
EP0060360A3 EP0060360A3 (fr) 1983-03-16

Family

ID=22914314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81303432A Withdrawn EP0060360A3 (fr) 1981-03-10 1981-07-27 Emballage refermable et méthode et dispositif pour sa fabrication

Country Status (2)

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EP (1) EP0060360A3 (fr)
JP (1) JPS57153831A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112249441A (zh) * 2020-10-26 2021-01-22 中国兵器装备集团自动化研究所 一种冷封口包装设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153310A (en) * 1937-12-06 1939-04-04 American Seal Company Package seal and label
FR1099235A (fr) * 1953-03-23 1955-08-31 British Sugar Corp Ltd Machine à empaqueter du sucre ou des produits similaires
US3085738A (en) * 1959-08-10 1963-04-16 Bok Edward Flat bag with an adhesive seal
US3131613A (en) * 1960-10-15 1964-05-05 Bok Edward Tape applying to flat bags
US3212698A (en) * 1964-05-08 1965-10-19 Cello Foil Products Inc Easy opening resealable bag
US3396902A (en) * 1967-07-17 1968-08-13 Albemarle Paper Co Refuse sack
US4066167A (en) * 1976-07-08 1978-01-03 Keebler Company Recloseable package

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153310A (en) * 1937-12-06 1939-04-04 American Seal Company Package seal and label
FR1099235A (fr) * 1953-03-23 1955-08-31 British Sugar Corp Ltd Machine à empaqueter du sucre ou des produits similaires
US3085738A (en) * 1959-08-10 1963-04-16 Bok Edward Flat bag with an adhesive seal
US3131613A (en) * 1960-10-15 1964-05-05 Bok Edward Tape applying to flat bags
US3212698A (en) * 1964-05-08 1965-10-19 Cello Foil Products Inc Easy opening resealable bag
US3396902A (en) * 1967-07-17 1968-08-13 Albemarle Paper Co Refuse sack
US4066167A (en) * 1976-07-08 1978-01-03 Keebler Company Recloseable package

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112249441A (zh) * 2020-10-26 2021-01-22 中国兵器装备集团自动化研究所 一种冷封口包装设备
CN112249441B (zh) * 2020-10-26 2022-06-03 中国兵器装备集团自动化研究所 一种冷封口包装设备

Also Published As

Publication number Publication date
JPS57153831A (en) 1982-09-22
EP0060360A3 (fr) 1983-03-16

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Inventor name: DIECKOW, KLAUS PETER