EP0476374A1 - Vorrichtung zum Anbringen von Streifen an Verpackungsfolien - Google Patents

Vorrichtung zum Anbringen von Streifen an Verpackungsfolien Download PDF

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Publication number
EP0476374A1
EP0476374A1 EP91114395A EP91114395A EP0476374A1 EP 0476374 A1 EP0476374 A1 EP 0476374A1 EP 91114395 A EP91114395 A EP 91114395A EP 91114395 A EP91114395 A EP 91114395A EP 0476374 A1 EP0476374 A1 EP 0476374A1
Authority
EP
European Patent Office
Prior art keywords
strip
cutting
sealing
jaw
web
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Withdrawn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
EP91114395A
Other languages
English (en)
French (fr)
Inventor
Roland Göransson
Jörgen Niske
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Pak Holdings SA
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Pak Holdings SA, Tetra Laval Holdings and Finance SA filed Critical Tetra Pak Holdings SA
Publication of EP0476374A1 publication Critical patent/EP0476374A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812—Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8125—Applying strips or strings, e.g. tear strips or strings
    • B31B50/8127—Applying strips or strings, e.g. tear strips or strings perpendicular to the direction of movement of the webs or the blanks

Definitions

  • the present invention relates to an apparatus for applying a material strip to a packaging material web, comprising a cutting unit for cutting-off a material strip from web-shaped, stepwise advanced strip material, and a sealing unit for applying the severed material strip to the material web.
  • Packaging material webs of flexible type which comprise layers of, for example, thermoplastic and paper, are employed for the manufacture of, for instance, consumer packages for milk, juice or other beverages.
  • Packaging containers of this type are often provided with opening arrangements which include some form of material strip, for example a tearing strip or a material strip which seals a prefabricated pouring spout.
  • the material strips are normally applied to the packaging material web while this is still in web form, i.e. before reforming thereof into individual packaging containers filled with the desired contents.
  • extremely high demands are placed on rapidity, accuracy and register alignment, which have been difficult to satisfy because the small dimensions and slight material thickness of the strips render them difficult to handle, in particular at high application speeds.
  • One prior art apparatus for applying material strips to a stepwise advanced packaging material web comprises two sequentially disposed workstations, namely a first station in which each individual material strip is cut off from stepwise advanced strip material, transferred into abutment against the material and is provisionally secured thereto, for example by spot welding or gluing, and a subsequent, second station in which compression and fixed fusion (or alternatively gluing) of the material strip to the packaging material web are carried out.
  • the employment of two sequentially disposed workstations necessitates not only the use of bulkier and more expensive equipment, but also complicates the manufacturing process proper, with less exact precision and slower workrates as a result.
  • the material strip is cut from a strip starting material whose width corresponds to the width of the material strip, i.e. the longitudinal direction of the material strip corresponds to the longitudinal direction of the starting material. Since the length of the finished material strip is normally between ten and fifty times greater than its width, this orientation necessitates advancement of a relatively long length of strip material prior to each cutting-off operation of an individual material strip, which further impedes the handling operation and slows down the working cycle.
  • One object of the present invention is to realise an apparatus for cutting and applying a material strip, the apparatus being compact and providing, in a single workstation, complete and finished strip application.
  • a further object of the present invention is to realise an application apparatus which operates with extreme accuracy and which ensures that the total surface of the material strip is completely sealed to the surface of the packaging material.
  • Yet a further object of the present invention is to realise an application apparatus which operates at high speed and with great reliability.
  • Still a further object of the present invention is, finally, to realise an apparatus for application of a material strip to a packaging material web, the apparatus not suffering from the drawbacks inherent in prior art, similar apparatuses.
  • an apparatus of the type disclosed by way of introduction has been given the characterizing features that it comprises a transfer device which, by means of gripping members, is operative to retain the material strip and, after the cutting operation, to transfer the strip from the cutting unit to the sealing unit, and fixing devices for fixing the material strip in the correct position in the sealing unit.
  • the apparatus according to the present invention caters for both strip production and strip application in a single workstation, i.e. without intermediate displacement of the packaging material web, both rapid and dependable application of the material strip will be achieved in the correct position on the packaging material web. It will hereby be ensured not only that the material strip is placed in absolute register on the packaging material web, but also that the material strip arrives in the correct position in relation to the sealing unit, it being hereby possible to ensure that a complete sealing takes place throughout the entire surface of the material strip, which is vital for preventing contents and possible sterilization agent from adhering between the strip and the surface of the packaging material web in the further reforming of the packaging material web into individual, filled package containers.
  • the apparatus comprises three main parts fixedly secured on a common frame 1, namely a magazine 2, a cutting unit 3 and a sealing unit 4 which, in this order, are disposed along an advancement path for a packaging material web 5, the path being defined by per se known guide means (not shown).
  • the magazine 2 includes a shaft 6 for a reel 7 of starting strip material 8.
  • the reel 7 is rotary by means of an electric motor (not shown) which is guided by means of a sensor device 9 in the form of guide rollers for the starting material 8 whose position indicates the need for strip advancement and controls the rotation of the reel 7 by the intermediary of electric devices (not shown).
  • This type of sensing device for controlling material advancement is well known in the art and probably needs no detailed description in this context.
  • the cutting unit 3 includes a feeder device 10 which comprises two parallel arms 11 pivotal about a shaft 12 at the upper region of the cutting unit 3.
  • the arms 11 are connected to drive means, for example in the form of a cam surface or a piston and cylinder assembly.
  • the shaft 12 extends transversely in relation to the direction of advancement of the strip starting material 8 and the distance between the two arms 11 slightly exceeds the width of the strip material 8.
  • the cutting device 15 Adjacent the feeder device 10 of the cutting unit, and thereafter (seen in the feed direction of the strip material 8), there is a cutting device 15.
  • the cutting device 15 comprises a cylinder 16 which extends transversely in relation to the strip material 8 and carries a knife 17 which is displaceable between two end positions a slight distance beyond each respective edge of the strip material 8.
  • the cylinder 16 is preferably a linear cylinder which may be driven pneumatically or by other means. It is, of course, also possible to employ other types of cutting devices, such as a pivotal knife or the like.
  • a movable jaw for stabilizing the material during the cutting operation proper. This may be designed as a conventional clamping jaw and will not, therefore, be described in greater detail in this context.
  • the sealing unit 4 Seen in the direction of movement of the two material webs 5 and 8, the sealing unit 4 is disposed after the cutting unit 3, the sealing unit comprising an upper portion with a transfer device 18 and a lower portion with a sealing or working device 19.
  • the transfer device 18 is of the same basic construction as the feeder device 10, i.e. it comprises two mutually parallel and mutually spaced arms 20 which are pivotally suspended about a shaft 21 extending transversely in relation to the strip material 8. Via the shaft 21, the transfer device 18 is connected to a pivotal drive arm 22 which is operative to be driven by means (not shown) eg in the form of a cam surface or a piston and cylinder assembly.
  • the lower ends of the arms 20 each display their gripping member 23 (Fig.
  • the upper finger 24 is pivotally disposed in the arm 20 of the transfer device 18 and is manoeuvrable between an upper, open position and the lower, illustrated operative position by means of known, for example pneumatic, operating devices.
  • the gripping members 23 move about the shaft 21 substantially from a position immediately after the cutting device 15 (Fig. 1) to a position immediately above the packaging material web 5 and flush with the working device 19 (Fig. 2a) of the sealing unit 4.
  • the sealing unit 4 further includes the working device 19 which has two mutually registering jaws extending transversely in relation to the packaging material web 5, namely a lower sealing jaw 26 and an upper counter jaw 27.
  • the counter jaw 27 is manoeuvrable between three positions by means of a toggle joint 28 which, by the intermediary of a drive arm 29, is connected to conventional drive means (not shown) eg a piston and cylinder assembly or a cam surface. All drive arms, i.e. the drive arm 13 for the feeder device 10, the drive arm 22 for the transfer device 18 and the drive arm 29 for the working device 19 may ideally be driven from cam surfaces on a common, electrically driven camshaft (not shown).
  • the toggle joint 28 is of conventional type and acts on the counter jaw 27 so that this may be displaced vertically up and down, guided by guide rails 30 which run in sleeves 31 (Fig. 2) vertically disposed in the frame 1.
  • the counter jaw 27 comprises two fixing devices 32 which, in slight spaced apart relationship, are slidably disposed in vertical holes in the counter jaw 27 and are actuated in a downward direction, i.e. towards the sealing jaw 26, with the aid of helical springs 33 or other spring means disposed in the holes.
  • the sealing jaw 26 constitutes a part of a plate cylinder 34 and has an upper, substantially rectangular working surface which is hydraulically manoeuvrable between a passive, lower position (Fig. 2a) and an active, upper position (Fig. 2c).
  • the apparatus according to the present invention further naturally includes a large number of conventional devices for driving, guiding and control of the apparatus.
  • these are of well-known type and are not germane to the present invention, for which reason they are not shown or described in greater detail in this context.
  • the illustrated embodiment of the apparatus according to the present invention is particularly designed to apply, with uniform spacing, elongate, narrow material strips transversely in relation to the packaging material web.
  • the material strips are intended to be included as a part in an opening arrangement for those packages or cartons which are subsequently manufactured from the packaging material web, and, in such instance, are often of longer length than the width of the packaging material web, since they are to extend, with a gripping portion, beyond a sealing edge in the finished package container.
  • the material strips are manufactured from or include layers of a heat sealable plastic material and are parted, with the aid of the apparatus according to the invention, from the strip starting material 8 which has a width of 140 mm. Each finished material strip will then be of a length of 140 mm and its width will be determined by the length of the stepwise advancement of the strip material 8, which typically amounts to 6 mm.
  • the strip starting material 8 is thus advanced stepwise 6 mm at a time with the aid of the feeder device 10 whose arms 11 execute a pivotal movement so that the gripping members 14 are reciprocated along the advancement path of the strip material 8 and alternatingly grasp and release the edges of the strip material, respectively.
  • the stepwise advancement is sensed by the sensor device 9 which ensures that the reel 7 is driven forwardly at a uniform speed so that the feeder device 10 can, at all times, advance the requisite length of strip material without, in this instance, being placed under loading by the mass of the reel 7.
  • both of its gripping members 23 are flush with both edges of the strip starting material 8 and the fingers 24 of the gripping members 23 are operated to open position so that the edges of the strip material 8 can be inserted in between the fingers 24 and 25, whereafter the fingers 24 are activated to assume a closed position abutting against the fingers 25 such that the projecting portion of the strip material 8 is held captive by the gripping members 23 (Fig. 2a).
  • the cutting device 15 executes a cutting movement, whereat the cylinder 16 operates the knife 17 in a linear stroke transversely in relation to the strip material 8 so that a desired length of the strip material 8 is severed.
  • the severed material strip is held with the aid of the gripping members 23 and is transferred to the correct position for being fixedly welded to the packaging material web 5 with the aid of the transfer device 18 which, by means of the drive arm 22, is pivoted counterclockwise about the shaft 21 until both of the gripping members 23 are located flush with both of the jaws 26 and 27 of the working device 19. Since the distance between both arms 20 of the transfer device 18 is slightly greater than the width of both of the jaws 26, 27, the transfer device 18 may unimpeded hold the material strip in this position, as is illustrated in Fig. 2a.
  • the counter jaw 27 is activated by means of the drive arm 29 and the toggle joint 28 so that it can be displaced from the rest position illustrated in Fig. 2a a distance from the sealing jaw 26, to an intermediate position (Fig. 2b) in which both of the fixing devices 32 abut, with the aid of the force from the springs 33, against the material strip and urge this against the packaging material web 5.
  • the fixing devices 32 now fix the material strip in the correct sealing position, and as soon as the counter jaw 27 has been brought to the intermediate position shown in Fig. 2b, the gripping members 23 can be released and the arms 20 of the transfer device 18 pivoted back to the position illustrated in Fig. 1 adjacent the cutting device 15.
  • the toggle joint 28 is once again operated so that the counter jaw 27 is displaced to its active position, in which the toggle joint 28 is brought to an upper central position and the material strip and packaging material web can be urged against one another with the aid of the sealing jaw 26 which, by means of the plate cylinder 34, realises requisite compression force to ensure a satisfactory seal between the material strip and the packaging material web.
  • the heating of the thermoplastic layer necessary for the seal preferably takes place by induction, and, to this end, the sealing jaw 26 is provided in a per se known manner with a coil for induction heating which may be placed in communication with a suitable power source. Other types of heating arrangement may also be employed, for example resistance heating or ultrasonic heating.
  • the design of the apparatus with a transfer device which grasps the material strip already before it is cut off from the strip starting material and conveys it to an accurately defined position in relation to the jaws 26 and 27 of the working device 19, in which position the fixing is taken over by the fixing devices 32 in the counter jaw 27, ensures that the severed material strip ends up at exactly the desired place in relation to the packaging material web 5 and the jaws 26, 27.
  • the jaws 26 and 27 of the working device can be given a working surface which slightly exceeds the surface of the material strip abutting against the packaging material web, which makes it possible to reliably seal the entire surface to the packaging material web, whereby unsealed parts or pocket formation can be avoided.
  • This feature is particularly desirable when the packaging material web is to be reformed into aseptic packaging containers, since it then passes through liquid sterilization agents which must not penetrate beneath the material strip.
  • the cutting-off of the strip material with such orientation that the width of the strip starting material corresponds to the length of the material strip further makes it possible to restrict the advancement length of the strip starting material 8, so that the apparatus can operate at very high speed, making it possible to carry out the entire operation in one station, i.e. the packaging material web 5 need only be stopped in register once for each strip application.
  • the apparatus according to the present invention can operate at extremely high rapidity and with exact precision.
  • gripping and fixing members and devices 23, 14 and 32 may be replaced by other devices of equivalent function, eg suction cups.
  • the feeder device 10 and the transfer device 18 may naturally be designed as devices linearly slidable along the strip starting material, but the illustrated embodiment has proved to function well in practice and is, therefore, preferred to other conceivable technical solutions.

Landscapes

  • Package Closures (AREA)
  • Making Paper Articles (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP91114395A 1990-09-13 1991-08-27 Vorrichtung zum Anbringen von Streifen an Verpackungsfolien Withdrawn EP0476374A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9002910 1990-09-13
SE9002910A SE466952B (sv) 1990-09-13 1990-09-13 Anordning foer applicering av en materialremsa paa en foerpackningsmaterialbana

Publications (1)

Publication Number Publication Date
EP0476374A1 true EP0476374A1 (de) 1992-03-25

Family

ID=20380341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114395A Withdrawn EP0476374A1 (de) 1990-09-13 1991-08-27 Vorrichtung zum Anbringen von Streifen an Verpackungsfolien

Country Status (5)

Country Link
EP (1) EP0476374A1 (de)
JP (1) JPH05212820A (de)
CN (1) CN1059877A (de)
CA (1) CA2050704A1 (de)
SE (1) SE466952B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU673183B2 (en) * 1992-07-10 1996-10-31 Boots Company Plc, The Dioxcyclobutene derivatives as angiotensin II antagonists

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500938C2 (sv) * 1992-11-24 1994-10-03 Tetra Laval Holdings & Finance Anordning för kontinuerlig applicering av remsbitar på en löpande materialbana
JP2771761B2 (ja) * 1993-10-08 1998-07-02 株式会社大西ライト工業所 シート材の切断装置
CN100381276C (zh) * 2005-05-08 2008-04-16 上海交通大学 自动贴条装置
JP2011057360A (ja) * 2009-09-09 2011-03-24 Nitto Denko Corp 粘着テープ貼付け方法および粘着テープ貼付け装置
DE102010029364A1 (de) * 2009-09-30 2011-04-07 Robert Bosch Gmbh Vorrichtung zum Handhaben von Öffnungseinrichtungen für Verpackungsbehälter
WO2014128934A1 (ja) * 2013-02-22 2014-08-28 株式会社柏原製袋 収容体用シートの加工方法及び加工装置
CN107108051B (zh) * 2015-01-21 2019-09-10 凸版印刷株式会社 搬运装置
CN105000229B (zh) * 2015-07-08 2017-07-04 北京洋航科贸有限公司 用于将易撕条封焊于包装体上的装置
CN107662362B (zh) * 2017-11-01 2024-04-02 佛山市嘉旭塑料制品有限公司 一种半自动切贴袋机压贴袋装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455698B (sv) * 1986-12-01 1988-08-01 Foerenade Well Ab Instellbar remsappliceringsanordning med forskjutbar graderad instellningsbalk
EP0384221A1 (de) * 1989-02-22 1990-08-29 WindmÀ¶ller & Hölscher Vorrichtung zum Aufbringen von mit einem Leimauftrag versehenen Verstärkungszetteln auf eine mit Querperforationen versehene Bahn

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455698B (sv) * 1986-12-01 1988-08-01 Foerenade Well Ab Instellbar remsappliceringsanordning med forskjutbar graderad instellningsbalk
EP0384221A1 (de) * 1989-02-22 1990-08-29 WindmÀ¶ller & Hölscher Vorrichtung zum Aufbringen von mit einem Leimauftrag versehenen Verstärkungszetteln auf eine mit Querperforationen versehene Bahn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU673183B2 (en) * 1992-07-10 1996-10-31 Boots Company Plc, The Dioxcyclobutene derivatives as angiotensin II antagonists

Also Published As

Publication number Publication date
SE9002910D0 (sv) 1990-09-13
CA2050704A1 (en) 1992-03-14
JPH05212820A (ja) 1993-08-24
SE466952B (sv) 1992-05-04
SE9002910L (sv) 1992-03-14
CN1059877A (zh) 1992-04-01

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